-
Open Access Article
1 - The Effects of Organizational Control Environment on Implementation of IT Control Processes
Nader RezaeiThe growing use of information technology solutions and applications in business operations has led to a growing need to implement appropriate control procedures. The implementation of IT control processes is affected by organizational control environment. This paper pr MoreThe growing use of information technology solutions and applications in business operations has led to a growing need to implement appropriate control procedures. The implementation of IT control processes is affected by organizational control environment. This paper presents the results of an experimental study exploring the influence of organizational control environment components on the domains of IT control processes. One hundred and ninety eight relatively experienced external and internal auditors and accounting managers responded to the mail survey. Results reveal the association between control environment components and IT control processes.The result of study indicates the relationships of control environment components and IT control processes domains. It also endorses the importance of control environment in the implementation of IT control processes. The findings of this study could help auditors and managers and other practitioners in designing and implementing information technology control systems. Manuscript profile -
Open Access Article
2 - A Satellite Control Method Using Laguerre Model Predictive Control Approach
shekoofeh jafari fesharaki farzad tihidkhah heydarali talebiIn this paper a Model Predictive Method based controller is proposed to control a satellite. Model Predictive Control (MPC) has been well known as a practical control method for various systems in industry. A problem with this method is its computational effort and time MoreIn this paper a Model Predictive Method based controller is proposed to control a satellite. Model Predictive Control (MPC) has been well known as a practical control method for various systems in industry. A problem with this method is its computational effort and time consuming. To reduce computational load Laguerre functions have been proposed in this literature. Simulation results are given to show feasibility and the validity of the design. A comparison between the time consumed in the presence and the absence of the Laguerre functions is done too. Manuscript profile -
Open Access Article
3 - Cross-layer Design for Congestion Control, Routing and Scheduling in Ad-hoc Wireless Networks with considering the Electrical Power of nodes
Hooman TahayoriAbstract Ad hoc Wireless Networks, are networks formed by a collection of nodes through radio. In wireless networking environment, formidable challenges are presented. One important challenge is connection maintenance mechanism for power consumption. In this paper, a mu MoreAbstract Ad hoc Wireless Networks, are networks formed by a collection of nodes through radio. In wireless networking environment, formidable challenges are presented. One important challenge is connection maintenance mechanism for power consumption. In this paper, a multi-objective optimal design is considered for ad-hoc networks which address the electrical power of nodes effects on cross-layer congestion control, routing and scheduling. We first formulate the rate and scheduling constraints. In this way, the multi-commodity flow variables are used. Then, resource allocation in networks with fixed wireless channel and single-rate devices is formulated. Since the electrical power of nodes effects are included in the design problem, we formulate resource allocation as utility and cost function, together in a maximization problem with those constraints. By dual decomposition, the resource allocation problem vertically decomposes into three sub-problems: congestion control, routing and scheduling. These three sub-problems interact through congestion and link price. Simulation results are included to verify the effectiveness of the proposed approach. Manuscript profile -
Open Access Article
4 - Three-axis attitude control of a micro-satellite by magnetic actuators through-synthesis robust method
ehsan habibollahian heydarali talebi masoud shafieeIn this paper a robust controller using µ-synthesis method has been designed for attitude control system of a micro-satellite in LEO orbit. Then the controller has been evaluated with accurate linear and nonlinear simulations. After necessary evaluation three-axis stabi MoreIn this paper a robust controller using µ-synthesis method has been designed for attitude control system of a micro-satellite in LEO orbit. Then the controller has been evaluated with accurate linear and nonlinear simulations. After necessary evaluation three-axis stabilization method with only magnetic torques and auxiliary gravity gradient boom was been selected. Nonlinear kinematics and dynamics equation of this system was obtained and linearization was performed on it. Finally the system was converted into a multivariable linear time varying system and controller for this system was performed via µ-synthesis, which has been done by changing from time varying system into system with uncertainty. Manuscript profile -
Open Access Article
5 - Effectiveness of information technology in monitoring and evaluating public service providers and institutions
Ehsan AbediniThis study was aimed to evaluate the effectiveness of information technology in monitoring and evaluating public service providers and institutions in order to extract managerial knowledge. This research is a descriptive survey. Data collection tool was a questionnaire MoreThis study was aimed to evaluate the effectiveness of information technology in monitoring and evaluating public service providers and institutions in order to extract managerial knowledge. This research is a descriptive survey. Data collection tool was a questionnaire including demographic information and questions about measuring variables. The statistical population of the present study consisted of employees of executive agencies located in Mazandaran province. The sample size was obtained using the Cochran formula, 346 people. The sampling method is simple random. Data were collected and classified by SPSS V. 21 and LISREL 8.8 software. The results of this study showed that speed, accuracy, reliability and ease of use of information technology have a significant effect on the monitoring and evaluation of services and facilities (p <0.001). In fact, rapid access to information, accelerated data processing, information provision through automation, and information security can lead to better monitoring and evaluation of service providers and institutions. Manuscript profile -
Open Access Article
6 - Routing improvement to control congestion in software defined networks by using distributed controllers
saied bakhtiyari Ardeshir AzarnejadSoftware defined networks (SDNs) are flexible for use in determining network traffic routing because they separate data plane and control plane. One of the major challenges facing SDNs is choosing the right locations to place and distribute controllers; in such a way th MoreSoftware defined networks (SDNs) are flexible for use in determining network traffic routing because they separate data plane and control plane. One of the major challenges facing SDNs is choosing the right locations to place and distribute controllers; in such a way that the delay between controllers and switches in wide area networks can be reduced. In this regard, most of the proposed methods have focused on reducing latency. But latency is just one factor in network efficiency and overall cost reduction between controllers and related switches. This article examines more factors to reduce the cost between controllers and switches, such as communication link traffic. In this regard, a cluster-based algorithm is provided for network segmentation. Using this algorithm, it can be ensured that each part of the network can reduce the maximum cost (including delays and traffic on links) between the controller and its related switches. In this paper, using Topology Zoo, extensive simulations have been performed under real network topologies. The results of the simulations show that when the probability of congestion in the network increases, the proposed algorithm has been able to control the congestion in the network by identifying the bottleneck links in the communication paths of each node with other nodes. Therefore, considering the two criteria of delay and the degree of busyness of the links, the process of placing and distributing the controllers in the clustering operation has been done with higher accuracy. By doing so, the maximum end-to-end cost between each controller and its related switches, in the topologies Chinanet of China, Uunet of the United States, DFN of Germany, and Rediris of Spain, is decreased 41.2694%, 29.2853%, 21.3805% and 46.2829% respectively. Manuscript profile -
Open Access Article
7 - Quantity and quality investigation of generated wastes at steel industries
Zahra Zamiraei علی ناهدRegarding to the variety of uses of steel in the world and widening its scope of application with the advancement of technology, steel production has changed to keep pace with advances in technology, following the changes; producers have tried to raise productivity and MoreRegarding to the variety of uses of steel in the world and widening its scope of application with the advancement of technology, steel production has changed to keep pace with advances in technology, following the changes; producers have tried to raise productivity and use of cheaper energy and fuels due to its geographical environment. There are the wastes in different stages of steelmaking (coke making, iron making and steelmaking). The generated wastes in this industry are with hazardous substances such as heavy metals, according to the classifications of the wastes, are classified as hazardous wastes. Therefore, identification and analysis and management of such waste in these industries are essential. The release of aforesaid hazardous wastes in nature can be had issues and problems for the environment and human health ultimately exceed the acceptable environmental conditions. The proper management of hazardous wastes in order to reduce and control pollution of the environment is utmost importance. Manuscript profile -
Open Access Article
8 - Promotion of principles related to construction control system based on sustainability approach and citizenship rights
sed ahmad anvari Mostafa Behzadfar esmaeil shieeThe rapid growth of construction in the modern world and the acceleration of the achievement of the final product have eliminated the opportunity of thinking and reflection in the layers of this industry. The purpose of this study was to investigate and evaluate the pri MoreThe rapid growth of construction in the modern world and the acceleration of the achievement of the final product have eliminated the opportunity of thinking and reflection in the layers of this industry. The purpose of this study was to investigate and evaluate the principles and guidelines of construction in Iran in relation to successful international sustainable construction systems such as Leyed and Bryme, as well as the emphasis on citizenship rights in the context of neighborhood and neighborhood rights. In order to achieve this goal, the method used in this study is of a descriptive-analytical and adaptive type with a critical approach and, in terms of its kind, is a part of applied research. The results of this study indicate that the basic principles of construction in Iran (technical, sanitary, urban, etc.) have proper basic principles, but these principles require a serious overhaul regarding the changes to It has emerged in terms of environmental and urban conditions in Iran and also due to new scientific advances and the growing importance of sustainable development issues around the world. Manuscript profile -
Open Access Article
9 - EXAMINING THE IMPACT OF CLOSED-CIRCUITED TELEVIOSIONS(CCTV) IN REDUCING URBAN CRIMES
Mahmood Vasegh Hossein Hataminejad shekoofeh jafari fesharakiOne of the main functions of governments, in better managed of their authority, is monitoring social affairs and citizenship behaviors within the law. Management and organization of social life, in the present era, because of the complexity processes of political, secur MoreOne of the main functions of governments, in better managed of their authority, is monitoring social affairs and citizenship behaviors within the law. Management and organization of social life, in the present era, because of the complexity processes of political, security and… in geographical environment, including major cities are extremely onerous and requires effective and efficient design and development methods and tools in this field. There is a question in this regard that how cans us increase the monitoring and control of the government in these areas. In response to the above question, this paper tries to come to investigate the effects of the application of intelligent monitoring and control systems and instruments (closed-circuited televisions) in reducing delinquency and urban crimes, how to increase government efficiency in controlling urban processes, should be investigated. This paper developed in descriptive-analytic methods and based on the field data, so The analysis and conclusions, in addition to the electronic library resources and results of a questionnaire is used. It should be noted that the validity of the questionnaire using factor analysis and reliability of the questionnaire was tested through Cronbach's alpha multiplied. Finally, the data obtained from the questionnaires were analyzed by examining the population mean (T-test). The results of this study show that the use of intelligent monitoring systems have significant role in reducing crimes in urban environments and social insecurities. Manuscript profile -
Open Access Article
10 - Structural controls on the hydrogeochemistry of Azarshahr travertine springs, NW Iran
Karim Taghipour Mohammad Mahdi Khatib Mahmod Rez Heyhata Abdol Rez Vaezihir Esmail ShabanianTravertine deposits in Azarshahr, NW Iran, are one of the most extensive travertine deposits in the world. The process of travertine deposit is currently active in the several springs. It was used a multidisciplinary approach to determine the source of fluids and struct MoreTravertine deposits in Azarshahr, NW Iran, are one of the most extensive travertine deposits in the world. The process of travertine deposit is currently active in the several springs. It was used a multidisciplinary approach to determine the source of fluids and structural characteristics of travertine springs. Results of in-situ measurements and type of travertine deposits, demonstrate that the springs are of thermogenic type with hydrothermal sources. Hydrogeochemical diagrams and ionic ratios represent that the type of spring waters are calcium carbonate, with increased sodium and chloride ions levels due to mixing with brine waters. Geophysical studies showed that these brines originated from the Urmia Lake or related brines, which are intruded through fracture systems to relay zones of faults and mixed with hydrothermal bicarbonate-saturated fluids. This phenomenon shows that hydrochemistry of travertine springs are affected by Urmia Lake or related brines. Manuscript profile -
Open Access Article
11 - Political Economy of State Developmentalism in Iran: A Study of Douglas North's Theory of Open and Restricted Access in the Islamic Republic
Ali RanjbarkiThis article explains the developmentalist status of political rule in the period of the Islamic Republic of Iran using the institutional theory of open and limited access "Douglas North". According to North, the elites and political rulers (ruling coalition) in a socie MoreThis article explains the developmentalist status of political rule in the period of the Islamic Republic of Iran using the institutional theory of open and limited access "Douglas North". According to North, the elites and political rulers (ruling coalition) in a society have two ways of forming social order and controlling violence. On the one hand, the open access system, which has impersonal rules and regulations, the rule of law and productive rent-seeking, which guarantees public access to society's resources and assets. And, on the other hand, the limited access system, which seeks to establish personal and private relationships and rules, sheikh and disciple (Murid &Morad) networks, unproductive rent-seeking and restricting the access of others to the resources and assets of society. Empirical evidence shows that open access systems guarantee and accelerate the achievement of economic development. Restricted access systems are not inherently developmental because economic development conflicts with the personal and group interests of the ruling coalition. Hence, political rule does not make a serious effort to address the problems and shortcomings in the path of economic development. In Iran, with the formation of the Islamic Revolution, the ground was opened for further opening of the social access system. But over time, with the occurrence of various internal and external events, political rule tended to limit the country's social system. This led to a special group of Islamists (traditional and fundamentalist right) becoming the dominant coalition of the country and using various strategies and policies to try to gain access to the sources of power and assets of the country in a centralized and exclusive way. Under these institutional conditions, the behavior of the country's political rulers is shaped in such a way that their main goal is to maintain the current political system in order to guarantee monopoly and centralized power and maximum access to the country's resources and assets. Therefore, increasing and allocating unproductive rents from oil revenues and government monopolies to groups affiliated with the ruling coalition, establishing personal and private relations and organizations, and restricting the participation and access of other groups to the economic and political resources of the country are the dominant coalition strategies. These strategies hinder the continuation and acceleration of economic development in the country. Thus, the behavior and plans of political rulers are not developmental. Manuscript profile -
Open Access Article
12 - Modeling and simulation of the central generator of the pattern to produce curved-linear motions in the snake robot
morteza vasegh yaghoub pourasadWith the advancement of science and technology and the importance of using robots, the need to use automated systems seems essential. Since most applications of snake robots move in unfamiliar and sometimes complex environments, there is a need to develop different cont MoreWith the advancement of science and technology and the importance of using robots, the need to use automated systems seems essential. Since most applications of snake robots move in unfamiliar and sometimes complex environments, there is a need to develop different control methods for them. The product of the integration of the two sciences of neuroscience and robotics, are motor neuron producers known as model central generators, which is the problem of producing motion in the robot. In this paper, we control the movement of a snake-like robot with a central pattern generator (CPG) that is able to produce coordinated patterns of output signals with different frequencies. For this purpose, it is necessary to model the snake robot first and then apply control Be. In this paper, the control of robot motion control in two modes of open loop and closed loop for CPG network is presented. At the same time, this study with simulations shows that the lower the level of stimulation and the lower its level, the lower the frequency of motion production and vice versa. Then, the effect of CPG models, which are used as neural networks, is simulated in motion control. In this paper, the remarkable point in comparison with other controllers is that in the central generating neural networks, the pattern of simple signals is sufficient to stimulate and induce the movement of robots, which is shown in the simulation Manuscript profile -
Open Access Article
13 - A Conflict Resolution Approach using Prioritization Strategy
Hojjat Emami Kamyar NarimanifarIn current air traffic control system and especially in free flight method, the resolution of conflicts between different aircrafts is a critical problem. In recent years, conflict detection and resolution problem has been an active and hot research topic in the aviatio MoreIn current air traffic control system and especially in free flight method, the resolution of conflicts between different aircrafts is a critical problem. In recent years, conflict detection and resolution problem has been an active and hot research topic in the aviation industry. In this paper, we mapped the aircrafts’ conflict resolution process to graph coloring problem, then we used a prioritization method to solve this problem. Valid and optimal solutions for corresponding graph are equivalent to free conflict flight plans for aircrafts in airspace. The proposed prioritization method is based on some score allocation metrics. After score allocation process, how much the score of an aircraft be higher its priority will be higher and vice versa how much the score of an aircraft be lower its priority will be lower. We implemented and tested our proposed method by different test cases and test results indicate high efficiency of this method. Manuscript profile -
Open Access Article
14 - A Stochastic Lyapunov Theorem with Application to Stability Analysis of Networked Control Systems
Babak Tavassoli Parviz Jabehdar MaralaniThe source of randomness in stochastic systems is an input with stochastic behavior as treated in the existing literature. Special types of stochastic processes such as the Wiener process or the Brownian motion have served as an adequate model of such an input for years MoreThe source of randomness in stochastic systems is an input with stochastic behavior as treated in the existing literature. Special types of stochastic processes such as the Wiener process or the Brownian motion have served as an adequate model of such an input for years. The body of stochastic systems theory is elegantly shaped around such input models. An example is the Itô’s formula. With development of new applications, we are faced with various phenomena that are more demanding from a stochastic modeling approach. To cope with this problem we restate the stochastic Lyapunov theorem such that it can be applied to a wider class of stochastic systems. In this paper stochastic systems are considered without imposing assumptions on the nature of the stochastic input and the way it affects the sample trajectories. Lyapunov stability theorem is represented for this type of systems in terms of a stability notion that generalizes the notion of stability in moments. As a result, the new theorem finds a larger domain of applications while it can be reduced to some known versions of the stochastic Lyapunov theorem. As an application, an existing deterministic result for nonlinear networked control systems is extended to a more practical probabilistic setting which extends the available analysis tools for checking the stability of continuous-time nonlinear networked control systems in the stochastic setting. The results are applied to a two-channel magnetic levitation system which is controlled over a local communication network to obtain a bound on the rate of transmission failures due to the presence of noise in the industrial environment. Manuscript profile -
Open Access Article
15 - A Bio-Inspired Self-configuring Observer/ Controller for Organic Computing Systems
Ali Tarihi Hassan Haghighi Fereidoon Shams AlieeThe increase in the complexity of computer systems has led to a vision of systems that can react and adapt to changes. Organic computing is a bio-inspired computing paradigm that applies ideas from nature as solutions to such concerns. This bio-inspiration leads to the MoreThe increase in the complexity of computer systems has led to a vision of systems that can react and adapt to changes. Organic computing is a bio-inspired computing paradigm that applies ideas from nature as solutions to such concerns. This bio-inspiration leads to the emergence of life-like properties, called self-* in general which suits them well for pervasive computing. Achievement of these properties in organic computing systems is closely related to a proposed general feedback architecture, called the observer/controller architecture, which supports the mentioned properties through interacting with the system components and keeping their behavior under control. As one of these properties, self-configuration is desirable in the application of organic computing systems as it enables by enabling the adaptation to environmental changes. However, the adaptation in the level of architecture itself has not yet been studied in the literature of organic computing systems. This limits the achievable level of adaptation. In this paper, a self-configuring observer/controller architecture is presented that takes the self-configuration to the architecture level. It enables the system to choose the proper architecture from a variety of possible observer/controller variants available for a specific environment. The validity of the proposed architecture is formally demonstrated. We also show the applicability of this architecture through a known case study. Manuscript profile -
Open Access Article
16 - A New Node Density Based k-edge Connected Topology Control Method: A Desirable QoS Tolerance Approach
Mohsen HeydarianThis research is an ongoing work for achieving consistency between topology control and QoS guarantee in MANET. Desirable topology and Quality of Service (QoS) control are two important challenges in wireless communication networks such as MANETs.In a Mobile Ad hoc Netw MoreThis research is an ongoing work for achieving consistency between topology control and QoS guarantee in MANET. Desirable topology and Quality of Service (QoS) control are two important challenges in wireless communication networks such as MANETs.In a Mobile Ad hoc Network, MANET, nodes move in the network area; therefore, the network topology is randomly and unpredictably changed. If the network topology is not controlled properly, the energy consumption is increased and also network topology probably becomes disconnected. To prevent from this situation, it is necessary to use desirable dynamic topology control algorithms such as k-edge connectivity methods. This papertries to improvethe three following parameters according to the k-edge connectivity concepts: (1) network performance, (2) reduce energy consumption, and (3) maintain the network connectivity. To achieve these goals, as a new method, we enhance k-edge connectivity methods using an improved definition of node density. The new method is called as: Node Density Based k-edge connected Topology Control (NDBkTC) algorithm. For the first time the node density definition is dynamically used. The new method, computes the node density based on a new equation which consists of the following factors: the relative velocity of nodes, distance between nodes, the number of nodes and the transmission range of nodes. The results show that our new method improves the network performance compared with the existing methods. Also we will show that the new method can holds QoS in a desirable tolerance range. Manuscript profile -
Open Access Article
17 - SSIM-Based Fuzzy Video Rate Controller for Variable Bit Rate Applications of Scalable HEVC
Farhad Raufmehr Mehdi RezaeiScalable High Efficiency Video Coding (SHVC) is the scalable extension of the latest video coding standard H.265/HEVC. Video rate control algorithm is out of the scope of video coding standards. Appropriate rate control algorithms are designed for various applications t MoreScalable High Efficiency Video Coding (SHVC) is the scalable extension of the latest video coding standard H.265/HEVC. Video rate control algorithm is out of the scope of video coding standards. Appropriate rate control algorithms are designed for various applications to overcome practical constraints such as bandwidth and buffering constraints. In most of the scalable video applications, such as video on demand (VoD) and broadcasting applications, encoded bitstreams with variable bit rates are preferred to bitstreams with constant bit rates. In variable bit rate (VBR) applications, the tolerable delay is relatively high. Therefore, we utilize a larger buffer to allow more variations in bitrate to provide smooth and high visual quality of output video. In this paper, we propose a fuzzy video rate controller appropriate for VBR applications of SHVC. A fuzzy controller is used for each layer of scalable video to minimize the fluctuation of QP at the frame level while the buffering constraint is obeyed for any number of layers received by a decoder. The proposed rate controller utilizes the well-known structural similarity index (SSIM) as a quality metric to increase the visual quality of the output video. The proposed rate control algorithm is implemented in HEVC reference software and comprehensive experiments are executed to tune the fuzzy controllers and also to evaluate the performance of the algorithm. Experimental results show a high performance for the proposed algorithm in terms of rate control, visual quality, and rate-distortion performance. Manuscript profile -
Open Access Article
18 - An Intelligent Autonomous System for Condition-Based Maintenance- Case Study: Control Valves
Hamidreza Naseri Ali Shahidinejad Mostafa Ghobaei-AraniMaintenance process generally plays a vital role to achieve more benefits to the enterprises. Undoubtedly, this process has a high value-added in oil and gas industries. Process owner expectations and new technology acquisition have been changing the mindset of domain e MoreMaintenance process generally plays a vital role to achieve more benefits to the enterprises. Undoubtedly, this process has a high value-added in oil and gas industries. Process owner expectations and new technology acquisition have been changing the mindset of domain experts to the new maintenance approaches and different newer methods such as condition-based maintenance models for improving the reliability and decreasing the cost of maintenance. Because of the high dynamic behavior of the gas and the instability of the input parameters, the need to apply a model with self-healing behavior is a serious demand in the gas industry. However, to the best of our knowledge, despite its importance, there is not any comprehensive study in the literature. In this paper, we present a new neuro-fuzzy model and a self-management control loop using real world data to meet the mentioned targets for a specified control valve in a gas refinery. ANFIS model is employed for the reasoning process which has six inputs (Inlet/outlet Pressures, temperature, flow rate, controller output and valve rod displacement), and one output that is a type of failure of the control valve and the most failures are considered based on domain expert knowledge. A suitable control loop is used to unceasingly monitor, analyze, plan and finally execute the process of prediction of failures. Due to undertaken improvement, there is a considerable change in reliability and financial indices. Moreover, the proposed approach is compared with two different methods. The results show that our proposed model comprehensively improves accuracy by 24%. Manuscript profile -
Open Access Article
19 - Energy Efficient Cross Layer MAC Protocol for Wireless Sensor Networks in Remote Area Monitoring Applications
R Rathna L Mary Gladence J Sybi Cynthia V Maria AnuSensor nodes are typically less mobile, much limited in capabilities, and more densely deployed than the traditional wired networks as well as mobile ad-hoc networks. General Wireless Sensor Networks (WSNs) are designed with electro-mechanical sensors through wireless d MoreSensor nodes are typically less mobile, much limited in capabilities, and more densely deployed than the traditional wired networks as well as mobile ad-hoc networks. General Wireless Sensor Networks (WSNs) are designed with electro-mechanical sensors through wireless data communication. Nowadays the WSN has become ubiquitous. WSN is used in combination with Internet of Things and in many Big Data applications, it is used in the lower layer for data collection. It is deployed in combination with several high end networks. All the higher layer networks and application layer services depend on the low level WSN in the deployment site. So to achieve energy efficiency in the overall network some simplification strategies have to be carried out not only in the Medium Access Control (MAC) layer but also in the network and transport layers. An energy efficient algorithm for scheduling and clustering is proposed and described in detail. The proposed methodology clusters the nodes using a traditional yet simplified approach of hierarchically sorting the sensor nodes. Few important works on cross layer protocols for WSNs are reviewed and an attempt to modify their pattern has also been presented in this paper with results. Comparison with few prominent protocols in this domain has also been made. As a result of the comparison one would get a basic idea of using which type of scheduling algorithm for which type of monitoring applications. Manuscript profile -
Open Access Article
20 - A New Power Control Algorithm in MMSE Receiver for D2D Underlying Massive MIMO System
Faezeh Heydari Saeed Ghazi-Maghrebi Ali Shahzadi Mohammad Jalal Rastegar FatemiDevice to device (D2D) underlying massive MIMO cellular network is a robust deployment which enables network to enhance its throughput. It also improves services and applications for the proximity-based wireless communication. However, an important challenge in such dep MoreDevice to device (D2D) underlying massive MIMO cellular network is a robust deployment which enables network to enhance its throughput. It also improves services and applications for the proximity-based wireless communication. However, an important challenge in such deployment is mutual interference. Interference, in the uplink spectrum, reusing the same resource with cellular user, is caused by D2D users. In this paper, we study a distributed power control (DPC) algorithm, using minimum mean square error (MMSE) filter in receiver, to mitigate the produced interference in this deployment scenario. For the DPC algorithm, employing the coverage probability of D2D links, an optimal power control approach is proposed, which maximizes the spectral efficiency of D2D links. Using this modeling approach, it is possible to derive closed-form analytical expressions for the coverage probabilities and ergodic spectral efficiency, which give insight into how the various network parameters interact and affect the link. Also, the DPC algorithm is modeled by stochastic geometry and receiver filter is designed by estimation theory that a new structure in this robust network is an approach to improve spectral efficiency. Simulation results illustrate enhancing coverage probability performance of D2D links in term of the target (signal to interference ratio) SIR with respect to different receiver filter and other parameters which are existing in D2D links. Manuscript profile -
Open Access Article
21 - Secured Access Control in Security Information and Event Management Systems
Leila Rikhtechi Vahid Rafeh Afshin RezakhaniNowadays, Security Information and Event Management (SIEM) is very important in software. SIEM stores and monitors events in software and unauthorized access to logs can prompt different security threats such as information leakage and violation of confidentiality. In t MoreNowadays, Security Information and Event Management (SIEM) is very important in software. SIEM stores and monitors events in software and unauthorized access to logs can prompt different security threats such as information leakage and violation of confidentiality. In this paper, a novel method is suggested for secured and integrated access control in the SIEM. First, the key points where the SIEM accesses the information within the software is specified and integrated policies for access control are developed in them. Accordingly, the threats entered into the access control module embedded in this system are carefully detected. By applying the proposed method, it is possible to provide the secured and integrated access control module for SIEM as well as the security of the access control module significantly increases in these systems. The method is implemented in the three stages of the requirements analysis for the establishment of a secure SIEM system, secure architectural design, and secure coding. The access control module is designed to create a secured SIEM and the test tool module is designed for evaluating the access control module vulnerabilities. Also, to evaluate the proposed method, the dataset is considered with ten thousand records, and the accuracy is calculated. The outcomes show the accuracy of the proposed method is significantly improved. The results of this paper can be used for designing an integrated and secured access control system in SIEM systems. Manuscript profile -
Open Access Article
22 - Self-Organization Map (SOM) Algorithm for DDoS Attack Detection in Distributed Software Defined Network (D-SDN)
Mohsen Rafiee Alireza shirmarzThe extend of the internet across the world has increased cyber-attacks and threats. One of the most significant threats includes denial-of-service (DoS) which causes the server or network not to be able to serve. This attack can be done by distributed nodes in the netw MoreThe extend of the internet across the world has increased cyber-attacks and threats. One of the most significant threats includes denial-of-service (DoS) which causes the server or network not to be able to serve. This attack can be done by distributed nodes in the network as if the nodes collaborated. This attack is called distributed denial-of-service (DDoS). There is offered a novel architecture for the future networks to make them more agile, programmable and flexible. This architecture is called software defined network (SDN) that the main idea is data and control network flows separation. This architecture allows the network administrator to resist DDoS attacks in the centralized controller. The main issue is to detect DDoS flows in the controller. In this paper, the Self-Organizing Map (SOM) method and Learning Vector Quantization (LVQ) are used for DDoS attack detection in SDN with distributed architecture in the control layer. To evaluate the proposed model, we use a labelled data set to prove the proposed model that has improved the DDoS attack flow detection by 99.56%. This research can be used by the researchers working on SDN-based DDoS attack detection improvement. Manuscript profile -
Open Access Article
23 - Stability Analysis of Networked Control Systems under Denial of Service Attacks using Switching System Theory
Mohammad SayadHaghighi Faezeh FarivarWith the development of computer networks, packet-based data transmission has found its way to Cyber-Physical Systems (CPS) and especially, networked control systems (NCS). NCSs are distributed industrial processes in which sensors and actuators exchange information bet MoreWith the development of computer networks, packet-based data transmission has found its way to Cyber-Physical Systems (CPS) and especially, networked control systems (NCS). NCSs are distributed industrial processes in which sensors and actuators exchange information between the physical plant and the controller via a network. Any loss of data or packet in the network links affects the performance of the physical system and its stability. This loss could be due to natural congestions in network or a result of intentional Denial of Service (DoS) attacks. In this paper, we analytically study the stability of NCSs with the possibility of data loss in the feed-forward link by modelling the system as a switching one. When data are lost (or replaced with a jammed or bogus invalid signal/packet) in the forward link, the physical system will not receive the control input sent from the controller. In this study, NCS is regarded as a stochastic switching system by using a two-position Markov jump model. In State 1, the control signal/packet passes through and gets to the system, while in State 2, the signal or packet is lost. We analyze the stability of system in State 2 by considering the situation as an open-loop control scenario with zero input. The proposed stochastic switching system is studied in both continuous and discrete-time spaces to see under what conditions it satisfies Lyapunov stability. The stability conditions are obtained according to random dwell times of the system in each state. Finally, the model is simulated on a DC motor as the plant. The results confirm the correctness of the obtained stability conditions. Manuscript profile -
Open Access Article
24 - Students Participation Pattern in Sport for all Based on Theory of Planned Training Behavior
mohammad ali ghareh Naser Zardithe goal of this research was presenting students participation pattern of Payame noor university in public sports based on theory of planned training behavior. The research was descriptive study that was done in a survey method. The statistical population consisted of Morethe goal of this research was presenting students participation pattern of Payame noor university in public sports based on theory of planned training behavior. The research was descriptive study that was done in a survey method. The statistical population consisted of students of Payame Noor University in the academic year 94-95. Statistical sample according to Morgan table was 384 people Which were selected by multi-stage clustering. The measurement tool included a modified behavioral scale of planned behavior. validty&Reliability if questionnaire were comfirmed. For inferential analysis of collected data used by Amos software and spss software version 18. The results of stepwise regression model showed that 46% of total changes in the level of participation in sport for all is dependent on three variables ; Attitude , behavior control and sport for all. Good fit indicators of Research model showed that The proposed model is well suited that means that the theory of the pattern of planned behavior can explaine student participation in sport for all. So it is suggested that sports devices to strive about doing tricks In order to strengthen the attitude , mental norms and perceived behavior controlling , along with other influential factors of Participation in sport for all, Including the provision of hardware and software infrastructure , access , financial issues , etc. to institutionalized sport for all in students. Manuscript profile -
Open Access Article
25 - Office Health in the Light of Islamic Supervision and Control, with Comparison to Iranian Office System
Hossein HabibiTabarOffice Health is among the issues with ethical bases in Islamic office ethics, with several elements engaging in the design of this ethical model. One of these elements is supervision and control. Having a glance over the state of supervision and control in the country MoreOffice Health is among the issues with ethical bases in Islamic office ethics, with several elements engaging in the design of this ethical model. One of these elements is supervision and control. Having a glance over the state of supervision and control in the country one acknowledges that it suffers many problems. Obviously, the rate of corruption and infractions in executive offices and organizations has a direct relation with the weakness of supervision and control system. Failures in fulfilment of organizational goals, low Productivity rate, client dissatisfaction and low financial-office health are observed as some signs of illness and corruption of Iranian offices. This is while office health, supervision and control are important issues in Islamic viewpoint. Considering the importance of the subject, the objective of this article is to survey office health with Islamic supervision and control with comparison to Iranian office system. Manuscript profile -
Open Access Article
26 - Shame and crime prevention from the perspective of criminology and Islamic ethics
mohamad ali haji deh abadi Abdul Wahab Karimione of the important issues in the two areas of criminology and Islamic ethics, is shame , which it’s effects in preventing of abnormal and criminal behaviors are emphasized in both areas of knowledge; Nevertheless, a careful look at the fundamentals and findings of cri Moreone of the important issues in the two areas of criminology and Islamic ethics, is shame , which it’s effects in preventing of abnormal and criminal behaviors are emphasized in both areas of knowledge; Nevertheless, a careful look at the fundamentals and findings of criminology and the teachings of Islamic ethics can reveal the subtle differences between the two in this area, namely the effect of shame on crime prevention. The present study tries to investigate this issue with a descriptive-analytical method. The findings of this study indicate that despite the commonalities of shame in terms of nature and principle of crime prevention, there are significant differences between these two areas of knowledge in terms of scope, scope of deterrence, factors and components, as well as in terms of quality and effectiveness. Manuscript profile -
Open Access Article
27 - The Theory of Benevolence in the Light the Qur'an and Mysticism
محمد تقی فعالیReligion qua religion has many wide-ranging and vast aspects. The question to be answered is whether we can summarize all those aspects in one and all-inclusive facet. Dealing with the theory of benevolence, this article says yes to this question. The theory suggests th MoreReligion qua religion has many wide-ranging and vast aspects. The question to be answered is whether we can summarize all those aspects in one and all-inclusive facet. Dealing with the theory of benevolence, this article says yes to this question. The theory suggests that from one side benevolence is the manifestation of the all-embracing name of al-Rahman, and from another side as the pure religion includes all aspects of religion. The holy name of Allah is the most embracing name of Him; then after this name, comes the fair name of al-Rahman as the most embracing name. al-Rahman is manifested in benevolence. Since religion has been revealed according to the embracing name of al-Rahman, one can say that benevolence is the core essence of religion. This theory has different principles. In what follows, the author has tried to study various aspects of that theory examining its principle and reasons in the light of the Qur’an and mysticism. The conclusion is that benevolence, self-sacrifice and in general mercy are the core essence and all-embracing aspect of religion. The methods followed here are reference-to-library for data collection and analytic-descriptive for judgment Manuscript profile -
Open Access Article
28 - Mathematical Modeling of Flow Control Mechanism in Wireless Network-on-Chip
Fardad Rad Marzieh GeramiNetwork-on-chip (NoC) is an effective interconnection solution of multicore chips. In recent years, wireless interfaces (WIs) are used in NoCs to reduce the delay and power consumption between long-distance cores. This new communication structure is called wireless netw MoreNetwork-on-chip (NoC) is an effective interconnection solution of multicore chips. In recent years, wireless interfaces (WIs) are used in NoCs to reduce the delay and power consumption between long-distance cores. This new communication structure is called wireless network-on-chip (WiNoC). Compared to the wired links, demand to use the shared wireless links leads to congestion in WiNoCs. This problem increases the average packet latency as well as the network latency. However, using an efficient control mechanism will have a great impact on the efficiency and performance of the WiNoCs. In this paper, a mathematical modeling-based flow control mechanism in WiNoCs has been investigated. At first, the flow control problem has been modeled as a utility-based optimization problem with the wireless bandwidth capacity constraints and flow rate of processing cores. Next, the initial problem has been transformed into a dual problem without limitations and the best solution of the dual problem is obtained by the gradient projection method. Finally, an iterative algorithm is proposed in a WiNoC to control the flow rate of each core. The simulation results of synthetic traffic patterns show that the proposed algorithm can control and regulate the flow rate of each core with an acceptable convergence. Hence, the network throughput will be significantly improved. Manuscript profile -
Open Access Article
29 - An Investigation of Effective Individual and Behavioral Characteristics of New Technology-Based Firms' Managers
Gholamreza Malekzadeh Azadeh Kiyani nejadIn the paper effective individual and behavioral characteristics of the new technology based firms' managers in a supportive environment such as Science and Technology Parkas and Technology Incubators are investigated and based on the results of the research, effective MoreIn the paper effective individual and behavioral characteristics of the new technology based firms' managers in a supportive environment such as Science and Technology Parkas and Technology Incubators are investigated and based on the results of the research, effective individual and behavioral characteristics for success of these managers and also their companies are presented. Also, in this study, researchers have tried to determine effective characteristics and indicators which are used in selecting and appointing the managers of such firms, and therefore improve the process of managers' selection. Sample firms are located in Khorasan Science and Technology Park (KSTP) which is one of the new supportive environments in the country. For this study, among the multiple personality characteristics and features, six individual and behavioral indicators were selected and highlighted which include: 1) confidence, 2) leadership abilities, 3) creativity and innovation, 4) participation and devolution, 5) human relationship skills and 6) internal control. Selection of these individual and behavioral indicators and characteristics are based on the results of the other researches and studies. After determining these characteristics through the review of literature, an evaluation questionnaire was designed and distributed to sample firms' managers and necessary information was obtained. By analyzing these results, the effective indicators and characteristics for success of managers were identified. The results shows that the first and sixth hypotheses of the research hypotheses are correct, i.e. confidence and internal controls are most effective indicators for success of these firms' managers. This research has not considered Employees' satisfaction. Manuscript profile -
Open Access Article
30 - The role of market and entrepreneurship orientation on the successof new product development
zeinab esfandyari mohammad javad naeijiThis article examines the relationship between company orientation(entrepreneurial orientation and market orientation), internal control systems and new product development. Different researches results provide valuable insights on the role of the company orientation MoreThis article examines the relationship between company orientation(entrepreneurial orientation and market orientation), internal control systems and new product development. Different researches results provide valuable insights on the role of the company orientation in New Product development. Entrepreneurial orientation helps the companies to have personal control in order to have great improvement in new product development activities .on the other hand market orientation emphasis more in output control than personal control in new product development. Manages in firms that emphasize output controls are evaluated and rewarded on the basis of objective financial criteria. Personal control on the other hand, focuses on long-term performance rather than short term financial targets. Generally personal control requires more time and has a higher coordination cost than output control. In recent decades, companies consider new product as a source of competitive advantage and means of anticipating the competitors. Some marketing research have found the relationship between market orientation and new product development. The goal of market orientation is to satisfy current market needs, rather than to develop new products targeted at emerging new needs. Some researchers criticize market orientation ,They suggest that entrepreneurship orientation must replace with market orientation. Some researches focus on one of the orientation , on the other hand they ignore the role of internal control systems as a mediating variable . Therefore we survey this subject completely. This study in terms of methodology is descriptive correlation. Manuscript profile -
Open Access Article
31 - The Moderating Role of Interal-External Locus of Control in the Relationship between Early Maladaptive Schemas and Social Anxiety in Adolescents
Seyed Valliollah Mousavi Sajjad Rezaei Setareh Atefi Karajvandani Hamid JavanparastThe present study aims to investigate the mediator role of locus of control in the relationship between early maladaptive schemas and social anxiety in adolescents. The statistical population included all male and female students of studying in state and non-state high MoreThe present study aims to investigate the mediator role of locus of control in the relationship between early maladaptive schemas and social anxiety in adolescents. The statistical population included all male and female students of studying in state and non-state high schools in Rasht District 1 in the academic year 2015-16. In a cross-sectional cluster sampling selected 400 students and responded to Social Anxiety Scale for Adolescents (SAS-A), Yang Maladaptive Schemas Questionnaire and Rutter Locus of Control Scale. The collected data were analyzed by using Pearson and Spearman correlation coefficients, Mediation hierarchical regression analysis with Baron and Kenny method. Pearson correlation analyses indicate a significant positive relationship between schemas of Disconnection/Rejection domain, Impaired Autonomy and/or Performance domain, Impaired Limits domain, Other-Directedness domain, Overvigilance/Inhibition domain and social anxiety, with values of 0.60, 0.55, 0.39, 0.54, 0.50 respectively. The results also revealed that this association, locus of control is not capable to modifying of the relationship between social anxiety and early maladaptive schemas (in any of domains). Manuscript profile -
Open Access Article
32 - The Relation of Classroom Instructional Quality and Cognitive Appraisals with Academic Emotions and its Motivational Outcomes
Zeinab Rabbani Siavash Talepasand Eśhagh Rahimian Boogar Mohammad Ali MohammadifarThe aim of present study was to investigate the relationship between the quality of classroom instruction and cognitive appraisals with academic emotions and their motivational outcomes, based on Pekrun’s control- value theory. The participants were 586 nine grade stude MoreThe aim of present study was to investigate the relationship between the quality of classroom instruction and cognitive appraisals with academic emotions and their motivational outcomes, based on Pekrun’s control- value theory. The participants were 586 nine grade students (male and female) in Tehran that selected using multistage cluster sampling method. The participants completed five questionnaires, Academic Emotions Questionnaire (AEQ), Academic Motivation Scale (AMS), Academic Control Scale, Cognitive Activation Questionnaires and Perceived Teacher Feedback, Questionnaire and four scales, task difficulty, task value, mastery evaluation and Teacher’s Quality of Teaching Scale. The relation between variables were examined by a structural equation modeling and tested with path analysis method that the model was confirmed. The results of path analysis showed that cognitive activation, task difficulty, mastery evaluation and achievement feedback had significant and direct effects on cognitive evaluations. Cognitive activation and task difficulty had direct and indirect significant effects on positive and negative emotions and self-determined motivation, through mediatory variables. Achievement feedback had a significant direct effect on positive emotions and it had indirect significant effects on negative emotions and self-determined motivation. However teacher instruction quality had only a direct effect on negative emotions and an indirect effect on self-determined motivation. Also academic control and task value had significant effects on positive and negative emotions and self-determined motivation, and this emotions had significant effect on self-determined motivation. Therefore instructional quality as classroom environmental factor affect on cognitive appraisals and they are both determinants of positive and negative emotions experienced in classroom, And these emotions affect on self-determined motivation of students Manuscript profile -
Open Access Article
33 - The structural model of obsessive-compulsive disorder based on maladaptive perfectionism and Parental psychological control in a nonclinical population
شهرام وکیلی هریس Sholeh Livarjani Naeimeh MohebThe purpose of the current study is investigate the mediating role of Personal maladaptive perfectionism and parental psychological control in the relationship between parental maladaptive perfectionism whit obsessive-compulsive disorder (OCD), using structural equation MoreThe purpose of the current study is investigate the mediating role of Personal maladaptive perfectionism and parental psychological control in the relationship between parental maladaptive perfectionism whit obsessive-compulsive disorder (OCD), using structural equation modeling (SEM). The research design is descriptive-correlation study. The participants were 586 students of Islamic Azad University Tabriz Branch, University of Tabriz and Azarbaijan Shahid Madani University in Iran whom were selected using cluster sampling method. Data were gathered by Obsessive Compulsive Inventory Revised (OCI-R), Frost Multidimensional Perfectionism Scale (FMPS) and Dependency-Oriented and Achievement-Oriented Psychological Control Scale (DAPCS) and were analyzed by SPSS and AMOS V. 24. SEM confirmed the proposed model (χ2 /df = 1.94, RMSEA = 0.04, CFI = 0.97, GFI = 0.96, AGFI = 0.94) and indicated that parental maladaptive perfectionism with Personal maladaptive perfectionism and parental psychological control mediation affects OCD with standard coefficient of 0.47 at a significant at the P˂0.05 level. The findings, supporting the theoretical model, proposes a suitable framework for psychopathology of the disorder that emphasizes Parental maladaptive perfectionism anticipates the obsessive-compulsive disorder through parental psychological control and Personal maladaptive perfectionism. These findings, can be useful in developing etiology, efficacious therapeutic interventions and the prevention for OCD. Manuscript profile -
Open Access Article
34 - Relationship between moral conscientiousness and Achievement goal: The mediating locus of control
Mohsen Arbezi farhad khormaeiThis study aims to examine the relationship between moral conscientiousness and goals of progress with source-mediated control. This research was a descriptive-correlational study. The statistical population of the study consisted of undergraduate students of Shiraz Uni MoreThis study aims to examine the relationship between moral conscientiousness and goals of progress with source-mediated control. This research was a descriptive-correlational study. The statistical population of the study consisted of undergraduate students of Shiraz University, from which 440 students (221 girls) and (219 boys) were selected through multistage cluster random sampling. They responded to task-oriented ethics questionnaires, locus of control, and goals of progress. To respond to the research hypotheses, path analysis was used in structural equation modeling. The results showed that although conscientious and trustworthy with all three achievement goals performance approach, mastery approach & mastery avoidance Have a positive and significant relationship; But with performance approach the relationship is greater. The results also showed that locus of control can mediate the relationship between moral conscientiousness and achievement goal. The results of this study contribute to the development of theoretical knowledge about the antecedent role of moral conscientiousness and locus of control in relation Achievement goal. Also, in practical terms, the implication of the research results is that by moral character, conscientious, and trustworthy (locus of control) can help develop appropriate development goals. Manuscript profile -
Open Access Article
35 - The Structural Model of Obsessive-Compulsive Disorder Based on Maladaptive Perfectionism and Parental Psychological Control
Shahram Vakiliheris Sholeh Livarjani Naeimeh MohebThe purpose of the current study is to investigate the mediating role of Personal maladaptive perfectionism and parental psychological control in the relationship between parental maladaptive perfectionism with obsessive-compulsive disorder (OCD), using structural equat MoreThe purpose of the current study is to investigate the mediating role of Personal maladaptive perfectionism and parental psychological control in the relationship between parental maladaptive perfectionism with obsessive-compulsive disorder (OCD), using structural equation modeling (SEM). The research design is descriptive-correlation study. The participants were 586 students of Islamic Azad University, Tabriz Branch, University of Tabriz, and Azarbaijan Shahid Madani University in Iran selected using the cluster sampling method. Data were gathered by Obsessive Compulsive Inventory Revised (OCI-R), Frost Multidimensional Perfectionism Scale (FMPS), and Dependency-Oriented and Achievement-Oriented Psychological Control Scale (DAPCS), and were analyzed by SPSS and AMOS V. 24. SEM confirmed the proposed model (χ2 /df = 1.94, RMSEA = 0.04, CFI = 0.97, GFI = 0.96, AGFI = 0.94) and indicated that parental maladaptive perfectionism with Personal maladaptive perfectionism and parental psychological control mediation affects OCD with standard coefficient of 0.47 (P˂0.05). The findings, supporting the theoretical model, propose a suitable framework for psychopathology of the disorders that emphasize Parental maladaptive perfectionism anticipates the obsessive-compulsive disorder through parental psychological control and Personal maladaptive perfectionism. These findings, can be useful in developing etiology, efficacious therapeutic interventions and preventions for OCD. Manuscript profile -
Open Access Article
36 - Relationship between Moral Conscientiousness and Achievement Goal: The Mediating Locus of Control
Mohsen Arbezi Farhad KhormaiThis study aims to examine the relationship between moral conscientiousness and goals of progress with source-mediated control. This research was a descriptive-correlational study. The statistical population of the study consisted of undergraduate students of Shiraz Uni MoreThis study aims to examine the relationship between moral conscientiousness and goals of progress with source-mediated control. This research was a descriptive-correlational study. The statistical population of the study consisted of undergraduate students of Shiraz University, from which 440 students (221 girls) and (219 boys) were selected through multistage cluster random sampling. They responded to task-oriented ethics questionnaires, locus of control, and goals of progress. To respond to the research hypotheses, path analysis was used in structural equation modeling. The results showed that although conscientious and trustworthy with all three achievement goals performance approach, mastery approach & mastery avoidance Have a positive and significant relationship; But with performance approach the relationship is greater. The results also showed that locus of control can mediate the relationship between moral conscientiousness and achievement goal. The results of this study contribute to the development of theoretical knowledge about the antecedent role of moral conscientiousness and locus of control in relation Achievement goal. Also, in practical terms, the implication of the research results is that by moral character, conscientious, and trustworthy (locus of control) can help develop appropriate development goals. Manuscript profile -
Open Access Article
37 - Predicting Suicidal Thoughts Based on Parental Psychological Control: The Mediating role of Mindfulness
zahra eghdami Mahboubeh FouladchangThe purpose of this study was to investigate the mediating role of mindfulness in the relationship between parental psychological control and suicidal ideation. Participants included 375 undergraduate students (204 girls and 171 boys) from Shiraz University who were sel MoreThe purpose of this study was to investigate the mediating role of mindfulness in the relationship between parental psychological control and suicidal ideation. Participants included 375 undergraduate students (204 girls and 171 boys) from Shiraz University who were selected using multistage random cluster sampling. They completed the dependency-oriented and achievement-oriented psychological control scale, five facet mindfulness questionnaire, and beck scale for suicide ideation. Reliability of research instruments was determined by Cronbach's alpha and validity by confirmatory factor analysis and internal consistency. The results of structural equation modeling showed that the proposed model fits well with the data of this study and that parental psychological control negatively predicts the dimensions of mindfulness. The findings also showed that parental psychological control has an indirect effect (through mindfulness) on suicidal thoughts. It is concluded that the parents' induction of shame and guilt in order to achievement or dependency of children can prevent mindfulness and then determine suicidal thoughts. Manuscript profile -
Open Access Article
38 - Investigating the mediating role of cognitive flexibility and cognitive control in the relationship between mindfulness and obsessive-compulsive symptoms in women
reza chalmeh fatemeh abdolahiThe present study was conducted to investigate a causal model for identifying the prognosis of obsessive-compulsive disorder based on mindfulness, control and cognitive flexibility in women. The present study was a descriptive correlational study in which the assumed re MoreThe present study was conducted to investigate a causal model for identifying the prognosis of obsessive-compulsive disorder based on mindfulness, control and cognitive flexibility in women. The present study was a descriptive correlational study in which the assumed relationships between variables were investigated using the path analysis method. In this model, the mindfulness variable was considered as an exogenous variable, and cognitive control and flexibility were considered as mediating variables and symptoms of obsessive-compulsive disorder as an endogenous variable. The statistical population included all women aged 18 and over living in Shiraz, of which 150 were selected as a sample group by random sampling. The tools used in this study included Yale Brown obsessive-compulsive disorder questionnaires, Freiburg mindset (short form), and cognitive control and flexibility. The results showed that mindfulness predicts the symptoms of obsessive-compulsive disorder inversely and significantly (β = -0.35). Cognitive flexibility (β = -0.24) and cognitive control (β = -0.23) were also negative and significant predictors of obsessive-compulsive disorder symptoms. Mindfulness was a positive and significant predictor of cognitive control (β = 0.80) and cognitive flexibility (β = 0.60). Finally, cognitive flexibility and cognitive control were able to mediate the role of exogenous and intrinsic variables. Play a child. Accordingly, mindfulness can reduce the symptoms of obsessive-compulsive disorder by affecting the two variables of cognitive flexibility and cognitive control. Mindfulness predicts the symptoms of obsessive-compulsive disorder inversely and significantly. In addition, cognitive flexibility is a negative and significant predictor of symptoms of obsessive-compulsive disorder; In addition, both cognitive flexibility and cognitive control variables could play a mediating role between exogenous and endogenous variables. Accordingly, mindfulness can reduce the symptoms of obsessive-compulsive disorder by affecting the two variables of cognitive flexibility and cognitive control. Manuscript profile -
Open Access Article
39 - Causes of failure in administrative and financial control systems: a case study of Iran University of Science and Technology
Saeed Mirzamohammadi Roghayeh KhademThe aim of this study is to identify the causes of failure in financial and administrative management and control systems: A Case Study of Iran University of Science and Technology. This descriptive and correlation study was conducted on the staff of the University of S MoreThe aim of this study is to identify the causes of failure in financial and administrative management and control systems: A Case Study of Iran University of Science and Technology. This descriptive and correlation study was conducted on the staff of the University of Science and Technology, with a sample size of 200 people. In this study, to assess the causes of failure in financial and administrative management and control systems, a pre-validated questionnaire was used with an alpha coefficient of α= 0.83. Factors affecting failure are divided into three categories. In addition to descriptive statistics, correlation and regression analysis were used. The results show that accounting systems, human factors and legal deficiencies in the administrative and financial control are, respectively, the most important causes of failure in financial and administrative management and control systems at Iran University of Science and Technology. Manuscript profile -
Open Access Article
40 - Math Modeling Customer Satisfaction with Dynamic Planning Approach (Case Study: Saipa Automobile Companies, Iran Khodro and Pars Khodro(
kamran jalilian kameleh nasiriCompanies must be able to preserve their customers and change them to the faithful ones. The automotive industry is one of the leading industries in the field of customer satisfaction. In this paper, based on a hierarchical analysis approach, customer satisfaction is fo MoreCompanies must be able to preserve their customers and change them to the faithful ones. The automotive industry is one of the leading industries in the field of customer satisfaction. In this paper, based on a hierarchical analysis approach, customer satisfaction is formulated based on indicators after sale services, sale process, initial quality study, initial quality study, automotive performance execution and layout of the automobile industry. Also, by presenting an optimization model, the optimum customer satisfaction path from 1395 to 1404 is presented as a perspective for Iran Khodro, Saipa and Pars Khodro companies using an optimized control methodology, which is used to solve the MATLAB software. Finally, the cost of upgrading the customer satisfaction of the products of these companies for two consecutive years is 1396-1395. The results of the research show that the number of initial quality study has the most impact on customer satisfaction, which should be given more importance in the future planning of automobile companies as the most important control variable in order to improve the optimum route of customer satisfaction over the years to come. Manuscript profile -
Open Access Article
41 - Designing and developing a model for strategic control measurement in organizations with different value logic
Mohammad Javad Azarshahi Mohammad Taghi Amini Mahdi AkbariThe purpose of this study was to design and develop a model for assessing the amount and type of dominant strategic control in organizations, and in assessing the appropriateness of the strategic control type and its appropriateness with the logic of the organization's MoreThe purpose of this study was to design and develop a model for assessing the amount and type of dominant strategic control in organizations, and in assessing the appropriateness of the strategic control type and its appropriateness with the logic of the organization's value creation. It seems that with the predominance of a kind of strategic control in an organization and the imbalance of the organization in the organization, the survival of the threatened organization and the assessment of the strategic control dimensions appropriate to the logic of value creation is necessary. So far, much research has failed to address this issue, and this field study has taken a step towards removing this knowledge gap. The present study is a mixed study. In the qualitative analysis of data, the method was transcendental and in the quantitative analysis section, structural equation modeling was used. The model qualitative findings revealed two parts of strategic behavioral and content control. In the quantitative part, the leading research is a cross-sectional descriptive survey. In this study, 279 employees from nine organizations with a region of value creation service, production, and social welfare were studied by random stratified sampling. Based on the scientific literature of strategic control, a 31-question questionnaire was designed and its validity and reliability were evaluated and verified, and after the strategic justification period, a research sample was distributed. The findings of the research indicate that the proposed structure is suitable for fitting. The results of the research show that there is a significant difference in the use of economic control and ethnic-cultural control among the manufacturing, service and social welfare organizations, but there was no significant difference in the use of other controls among the organizations. Manuscript profile -
Open Access Article
42 - Life cycle of the Tehran air pollution control project: an stakeholder analysis approach
mojtaba dashti meysam shahbazi Adel Azar mohammadhasan malekiObjective: This research aims to analyse key stakeholders in Tehran air pollution control project during its life cycle. Methods: Since the research is qualitative, after librarian research and gathering research literature, the actors of Tehran air pollution control p MoreObjective: This research aims to analyse key stakeholders in Tehran air pollution control project during its life cycle. Methods: Since the research is qualitative, after librarian research and gathering research literature, the actors of Tehran air pollution control project were recognized and the outputs analyzed using Delphi method. Key actors were determined after Delphi method application and analyzed using power-interest matrix during life cycle. Results: in the present study, 12 key actors identified and selected from 23 actors as follows: “Ministry of Industry, Mine and Trade”, “Environmental Protection Agency”, “Islamic Republic of Iran Broadcasting Organization”, “National Standard Organization of Iran”, “Tehran Air Quality Control Company”, “Deputy of Transport and Traffic of Tehran Municipality”, “Insurance organizations”, “Oil Ministry”, “traffic police”, “Automakers”, “Ministry of Health and Medical Education”, “Environmental Protection and Sustainable Development Organization of Tehran Municipality”. Conclusion: in the present study, key actors changed in each stage of projects life cycle while in almost all similar projects this fundamental change has been ignored in the project run time. also after reviwing formal documents, laws and strategies that have been written for solving air pollution crisis it was found that “Insurance organizations” have been ignored as a key actor in solving this crisis. Manuscript profile -
Open Access Article
43 - The role of impulse control, irritability and attachment style of mothers in predicting the symptoms of attention deficit / hyperactivity disorder in children
zahra sepehrinasab sajjad basharpoor seyfollah Aghajani nader hajlooThe aim of this study was the role of impulse control, irritability and attachment style of mothers in predicting the symptoms of attention deficit / hyperactivity disorder in children. The present study was a descriptive correlational study. 120 mothers of elementary s MoreThe aim of this study was the role of impulse control, irritability and attachment style of mothers in predicting the symptoms of attention deficit / hyperactivity disorder in children. The present study was a descriptive correlational study. 120 mothers of elementary school students (65 girls and 55 boys) who were studying in Tehran in the academic year of 2019- 2020 and had symptoms of attention deficit-hyperactivity disorder were selected using the purposive sampling method. Data were collected using the Connerss Parent Questionnaire (1999), the Buss and Plomine Irritability Questionnaire (1984), the Lynham Impulse Control Scale (2006), and the Collins and Read Attachment Styles Questionnaire (1999). To analyzing data, was used Pearson correlation coefficient and multiple regression analysis. The results of regression analysis showed that the control of impulse, irritability and attachment style of mothers by explaining 58 percent of the variance of the total score of attention deficit-hyperactivity disorder symptoms can predict the criterion variable. These findings indicate that therapists and psychologists pay close attention to the psychological characteristics of mothers in the effectiveness of treatment for the symptoms of attention deficit hyperactivity disorder in children. Manuscript profile -
Open Access Article
44 - Design and Implementation of an IGBT Gate Driver with Necessary Protections and SMD Devices
M. Fazeli S. A. AbrishamifarThe Gate drivers in modern power converters which use the power IGBT must be provide several main operations such as electrical isolation, current amplifying, and protection against overcurrent and overvoltage conditions. This paper describes such a new circuit which is MoreThe Gate drivers in modern power converters which use the power IGBT must be provide several main operations such as electrical isolation, current amplifying, and protection against overcurrent and overvoltage conditions. This paper describes such a new circuit which is made using SMD devices suitable for driving the high and medium power IGBTs. This driver includes an isolated switching power supply, buffer circuits, and several protection circuits. It can operate by an input signal at TTL level and %50 duty cycle and is able to work up to 6A peak current. Manuscript profile -
Open Access Article
45 - Design and Control of Three-Phase Shunt Active Power Filter Using the Sliding Mode Control and Energy Feedback
M. Nayeripour A. Yazdian Varjani M. Mohamadian H. R. mohammadiThe presence of nonlinear and unbalance loads in a three-phase network causes harmonics generation and dissipation in power network. One of the usual methods used for decreasing and eliminating these effects is the application of active and passive filter. The passive f MoreThe presence of nonlinear and unbalance loads in a three-phase network causes harmonics generation and dissipation in power network. One of the usual methods used for decreasing and eliminating these effects is the application of active and passive filter. The passive filter is designed for a particular kind of frequency and therefore eliminates a particular harmonics. Its weakness, however, is the possibility of its resonance with the equivalent network impedance and the large size of its elements. The active filter helps to remove the above problems. Moreover, this filter causes the harmonics to be rejected individually or all together and prohibits the occurrence of resonance with the network. One of the problems of these filters is the limited dynamics response that considers the steady state of harmonics. In this paper, unlike the previous methods on single phase analysis, the inverter used in active filter is analyzed more precisely, i.e., the simultaneous three- phase analysis. The ohmic effect of phase-inductances is also taken into account. The inverter control system makes use of two internal and external loops. The external loop produces suitable signal for on/off switching through sliding mode control. The internal loop utilizes energy feedback to adjust the capacitor voltages. This new method effectively improves the speed of dynamic filter response in comparison with the previously reported methods and is able to quickly compensate harmonics and load unbalancing. Manuscript profile -
Open Access Article
46 - Design and Implementation of a 125 kV/1000 kVA High-Voltage Test System Using Series-Resonance Technique
A. A. Lotfi-Neyestanak H. R. Sadegh MohammadiThis paper presents the design, analysis, simulation, and implementation of a high-power resonance generator for testing high-voltage capacitive loads. The resonance generator includes a variable reactor which is the most important part of the system, a shielded isolat MoreThis paper presents the design, analysis, simulation, and implementation of a high-power resonance generator for testing high-voltage capacitive loads. The resonance generator includes a variable reactor which is the most important part of the system, a shielded isolation transformer, a voltage regulator (auto-transformer), an exciter transformer, a capacitive divider, a control cubicle, a digital voltmeter, a computer based partial discharge measurement system, a high-voltage filter, and a low-voltage filter. The paper describes the analysis and simulation of different parts of the system. It also presents the results of tests were performed using the implemented system on different capacitive loads, including the measurements of harmonic distortions and partial discharge. The inductance measurement of the implemented variable reactor matches with the simulation results. The partial discharge measurement of the implemented high-voltage series-resonance test system shows that the system is PD free up to 70 kV. Manuscript profile -
Open Access Article
47 - Performance Analysis of DFT block code in the Presence of Quantization Noise over Fading Channel
P. AzmiError control codes are among the most useful methods for mitigating the effect of fading and channel noise. Most of researches on error control codes are focused on the codes defined over finite (Galois) fields. In this paper, we consider DFT code defined over infinite MoreError control codes are among the most useful methods for mitigating the effect of fading and channel noise. Most of researches on error control codes are focused on the codes defined over finite (Galois) fields. In this paper, we consider DFT code defined over infinite Real field. We will analysis the performance of DFT code in the presence of quantization noise over fading channel. Our simulation results show that this code can efficiently suppress the effect of fading and channel noise. It will be shown that DFT code outperforms the well-known Reed Solomon code in low signal to noise ratio ranges. Manuscript profile -
Open Access Article
48 - Adaptive Inverse Controller Design for Teleoperation Systems
M. Sha Sadeghi H. R. Momeni R. Amirifar S. GanjefarThis paper presents a new robust adaptive inverse control approach for a force-reflecting teleoperation system with varying time delay. In this approach, using the Smith predictor idea, an impedance controller and an adaptive inverse controller are designed, respectivel MoreThis paper presents a new robust adaptive inverse control approach for a force-reflecting teleoperation system with varying time delay. In this approach, using the Smith predictor idea, an impedance controller and an adaptive inverse controller are designed, respectively, for the master and slave robots such that the stability and performance of the closed-loop system are achieved in the presence of communication channels varying time delay. Also, based on robust control theory, two sufficient conditions for the stability of overall system are derived. The time domain desired specifications are contained in the design problem using the standard characteristic polynomials. Also, the proposed approach is compared with the sliding mode control. The simulation results show the proposed approach successfully compensates the position drift although time delay is randomly varying. Manuscript profile -
Open Access Article
49 - Optimization of Shunt Active Power Filter and Load Current with an Improved Sliding Mode Control
M. Nayeripour A. Yazdian Varjani M. MohamadianIn this paper, the compensation of load harmonic current is investigated using Lagrange function and minimization of load current active component. The results are compared with load harmonic current compensation using instantaneous three phase reactive power theory. N MoreIn this paper, the compensation of load harmonic current is investigated using Lagrange function and minimization of load current active component. The results are compared with load harmonic current compensation using instantaneous three phase reactive power theory. Next the PI and sliding mode controller are modified such that RMS value of error signal is minimized and state variables reach the sliding surface faster than conventional sliding mode controller. This improves the dynamic response of active power filter under load unbalance and harmonics conditions. Manuscript profile -
Open Access Article
50 - Novel Automatic Clustering Technique Based on the Artificial Immune Algorithm
Seyed-Hamid ZahiriIn this paper a novel technique for automatic data clustering based on the artificial immune algorithm is proposed. The lengths of the antibodies are dynamically changed based on inter-clusters and intra-clusters distances by means of a fuzzy controller which has been a MoreIn this paper a novel technique for automatic data clustering based on the artificial immune algorithm is proposed. The lengths of the antibodies are dynamically changed based on inter-clusters and intra-clusters distances by means of a fuzzy controller which has been added to the immune algorithm to provide, also, a soft computing approach for data clustering. This idea leads to proper number of clusters and effective and powerful clustering process without any additional try and error efforts. Also the manual setting of the number of clusters is available in the proposed algorithm (like other unsupervised clustering approaches) after removing the fuzzy controller from the proposed clustering system. The method has been tested on the different kinds of the complex artificial data sets and well known benchmarks. The experimental results show that the performance of the proposed technique is much better than the k-means clustering algorithm (as a conventional one), specially for huge data sets with large feature vector dimensions. Furthermore, it is found that the performance of the proposed approach is comparable, sometimes better than the genetic algorithm based clustering technique (as an evolutionary clustering algorithm). Manuscript profile -
Open Access Article
51 - Design of UPFC Controller Using Bilinear Equation for Improving Power System Stability
M. Nayeripour A. Yazdian Varjani M. MohamadianIn this paper the model of UPFC is represented by a bilinear equation. Then with the second method of Lyapunov, the input of converter is derived such that the derivative of energy function is negative. The design of controller is carried out with two methods. In the fi MoreIn this paper the model of UPFC is represented by a bilinear equation. Then with the second method of Lyapunov, the input of converter is derived such that the derivative of energy function is negative. The design of controller is carried out with two methods. In the first method, the controller is linearized at operating point. In the second method, the nonlinear method is used in the series converter and the PI controller is used in the shunt converter. Reduction of first swing peak after fault clearing is the main advantage of designed controller with respect of PI controller. Manuscript profile -
Open Access Article
52 - Robust Position Control in DC Motor by Fuzzy Sliding Mode Control a Novel
M. Hendijani-Zadeh A. Yazdian Varjani M. MohamadianIn spite of improvement of the AC drive systems still the DC drives are widely used in industry. One of the problems associated with control of DC motor which might cause unsuccessful attempts for designing a proper controller would be the time-varying nature of DC moto MoreIn spite of improvement of the AC drive systems still the DC drives are widely used in industry. One of the problems associated with control of DC motor which might cause unsuccessful attempts for designing a proper controller would be the time-varying nature of DC motors parameters and variables which might be changed while working with the motion systems. In these conditions, the control system will not response properly. One of the best suggested solutions to overcome this problem would be the use of sliding mode control (SMC). SMC is not sensitive to parameters changes and yet would have a fair response to the systems variations. However, SMC suffers from some deficiencies including inflexibility in controller parameters. A Better response can be achieved by SMC in compare with classical methods but it is not the most optimized response. The fair solution can be defined through faster fulfillment of target, less overshoot and more consistency of the system against the changes of the parameters. In this paper, a new fuzzy based method is presented to increase the SMC ability to reach a more convenient solution. Optimized response can be achieved in terms of shorter settling time, less overshoot, and more stability. Manuscript profile -
Open Access Article
53 - On the Stability of Primal-Dual Congestion Control Algorithm in the Presence of Exogenous Disturbances
A. moarefianpour V. johari majdIn this paper, we consider the effects of exogenous disturbances on the closed-loop system of the congestion control problem in a network with general structure. This investigation is important since many of data flows in internet network are considered as unmodeled flo MoreIn this paper, we consider the effects of exogenous disturbances on the closed-loop system of the congestion control problem in a network with general structure. This investigation is important since many of data flows in internet network are considered as unmodeled flows. In contrast to previous works, we suppose that both senders and links in the network have dynamics. Each sender updates its sending rate to minimize its own cost function. The network is modeled based on fluid flow approximation with nonlinear dynamics for the links. In this research, we first derive the conditions for the existence of the system equilibrium point taking into account the constraint sets of the problem. Then, we prove input-to-state stability (ISS) of the closed-loop system for the congestion control problem with input and output disturbances in the network links. We further show that the obtain results are valid even when the routing matrix of the network varies. Finally, we verify the theoretical results by simulation on two different multi-link networks. Manuscript profile -
Open Access Article
54 - Power System Stability Improvement Using QFT-Based Excitation Robust Control
A. Akbari Forod H. Seifi A. khaki sedighDue to uncertainties in system modeling as well as system parameters, current excitation systems are unable to perform quite satisfactorily over a wide range of operating conditions. In this paper a QFT-based excitation robust control is proposed which the above mention MoreDue to uncertainties in system modeling as well as system parameters, current excitation systems are unable to perform quite satisfactorily over a wide range of operating conditions. In this paper a QFT-based excitation robust control is proposed which the above mentioned uncertainties are, somehow, considered. The Horowitz second method is employed in the design of the nonlinear QFT controller. Manuscript profile -
Open Access Article
55 - Placement and Performance Analysis of UPFC in Restructured Power Systems
a.k. abrishami A. Yazdian Varjani H. SeifiIn this paper a new steady state modeling of unified power flow controller (UPFC) is proposed. Using this model, factors that affect the objective function of electricity market as a result of UPFC installation in power grid has been decomposed into four components, inc MoreIn this paper a new steady state modeling of unified power flow controller (UPFC) is proposed. Using this model, factors that affect the objective function of electricity market as a result of UPFC installation in power grid has been decomposed into four components, including line series impedance increase, shunt reactive power compensation, in-phase component of series voltage and quadrature component of series voltage. An UPFC has been placed in different points of a test system and impact of each component on objective function of electricity market has been measured by simulation and compared with results from analytical method. Both active and reactive locational marginal prices are calculated and their relation with settings of UPFC series part has been studied. Manuscript profile -
Open Access Article
56 - Improving QoS and Reducing Transmit Power in Wireless Ad Hoc Networks by Distributed Power Control Using SINR and Transmit Power Pricing Functions
R. Haratian A. R. SharafatWe propose a scheme for improving QoS and reducing transmit power in wireless ad hoc networks by utilizing the signal-to-interference-plus-noise-ratio (SINR) and a pricing function that is proportional to the transmit power of each user. The performance of our proposed MoreWe propose a scheme for improving QoS and reducing transmit power in wireless ad hoc networks by utilizing the signal-to-interference-plus-noise-ratio (SINR) and a pricing function that is proportional to the transmit power of each user. The performance of our proposed method is analyzed by using game theory, where each user’s quality of service is a function of its SINR. The utility function for each user is defined by its desired SINR minus a pricing to provide adequate incentive for each user to choose its power level in such a way to maximize the aggregate of all users’ utilities (total network utility) instead of selfishly maximizing its own SINR. Simulation results show that the performance of the network is improved while the total power consumption is reduced. Manuscript profile -
Open Access Article
57 - Design a Unified Power Flow Controller (UPFC) Using Bilinear Sliding Mode Control Method
T. Niknam M. Nayeripour A. Yazdian Varjani M. MohamadianIn this paper, at first, a new model will be attained for unified power flow controller (UPFC) using state space equation of bilinear systems. Then, a complete novel method of designing UPFC controllers will be represented by the use of variant structure systems. In thi MoreIn this paper, at first, a new model will be attained for unified power flow controller (UPFC) using state space equation of bilinear systems. Then, a complete novel method of designing UPFC controllers will be represented by the use of variant structure systems. In this method, input signals of UPFC are designed through sliding mode controller. In order to design these kinds of controllers, at first, control rules are obtained by the use of designing four different slide levels and then setting their derivatives (which express dynamics of the flows of axes d and q, in serial and parallel transformers) to zero. In fact, applying the outputs of this controller to UPFC is equal to bring the flows of axes d and q to the reference value in both UPFC. In the other hand, internal dynamics (DC capacitor voltage) will be stabilized in UPFC by means of PI controller. The stability of the system is obtained through Lyapunov function. Manuscript profile -
Open Access Article
58 - Direct Torque Control in a Flying Capacitor Inverter with Reduction of Common Mode Voltage
Mohammad Arasteh S. Farhangi S. A. AbrishamifarBearing current in inverter-fed induction motors can result in premature bearing failure. This paper gives a detailed analysis of common mode voltage as the main source of bearing currents. Moreover, it presents an algorithm to reduce the common mode voltage in multilev MoreBearing current in inverter-fed induction motors can result in premature bearing failure. This paper gives a detailed analysis of common mode voltage as the main source of bearing currents. Moreover, it presents an algorithm to reduce the common mode voltage in multilevel DTC drive. Based on the given analysis, the common mode voltage is reduced to about 33 percent of the initial value. The simulation results in MATLAB/SIMULINK confirm the capability of the algorithm in common mode voltage reduction without degrading the electromagnetic torque and the speed response. The results of real world experiments using TMS320F2812 DSP processor are also provided. Manuscript profile -
Open Access Article
59 - Design of Proportional-Integral Sliding Mode Controllers for Hyperchaotic Systems in the Presence of Uncertainty, Disturbance and Nonlinear Control Inputs
A. Abooee M. R. Jahed Motlagh Z. RahmaniIn this paper, robust controllers for a new hyperchaotic system are investigated in the presence of uncertainty, disturbance and nonlinear control inputs. The controllers are designed by considering two major goals: first to stabilize the hyperchaotic system in the pres MoreIn this paper, robust controllers for a new hyperchaotic system are investigated in the presence of uncertainty, disturbance and nonlinear control inputs. The controllers are designed by considering two major goals: first to stabilize the hyperchaotic system in the presence of uncertainties, disturbance and nonlinear control inputs; and second, to guarantee the prescribed disturbance attenuation, considering the defined performance index for it. Sliding mode control by defining three proportional integral switching surfaces is used to reach mentioned goals. Numerical simulations are used to exhibit the feasibility and performance of the proposed method. Manuscript profile -
Open Access Article
60 - A New Switching Algorithm for Compensating the Voltage Deviation of NPC Inverter DC Link Capacitors in DTC Drive of Induction Motors
A. Sadeghi Larijani M. Shahparasti M. Mohamadian A. Yazdian VarjaniIn this paper a novel direct torque control algorithm based on switching table using three-level diode clamp inverter is introduced. Voltage deviation of DC link capacitors is one of the most significant problems of NPC three-level voltage source inverters. The voltage MoreIn this paper a novel direct torque control algorithm based on switching table using three-level diode clamp inverter is introduced. Voltage deviation of DC link capacitors is one of the most significant problems of NPC three-level voltage source inverters. The voltage imbalance of DC link capacitors will result in low level harmonics, undesirable torque variation and motor efficiency reduction. To resolve this problem, a closed loop algorithm is introduced in this paper, in addition to its simple implementation; the algorithm is able to control the voltage fluctuation of DC link capacitors within the desirable limits. The result of simulation and experimental implementation confirms the performance of this method despite capacitors reduced capacity. Manuscript profile -
Open Access Article
61 - Boiler-Turbine Coordinated Control Based on Improved Sliding Mode Controller
S. Golmohammadi R. Hooshmand Mohammad عطائیIn order to participate steam power plant in power system frequency regulating, in addition to producing the base load, the boiler and turbine should be controlled coordinately. Lack of coordinated control may lead to instability, cause oscillation in producing power an MoreIn order to participate steam power plant in power system frequency regulating, in addition to producing the base load, the boiler and turbine should be controlled coordinately. Lack of coordinated control may lead to instability, cause oscillation in producing power and boiler parameters, and reducing the reliability and creating thermodynamic tension to devices. This paper proposes a sliding mode based controller to control two main boiler-turbine parameters; i.e., the turbine revolution and superheated steam pressure of the boiler output. For this purpose, complete and exact model of the subsystems including turbo-generator, turbine and related control systems are derived and the ability of the method is shown using this comprehensive model. The proposed method is simulated on the 320 MW unit of Islam-Abad power plant in Isfahan/Iran and its performance is compared with the related real PI controllers which have been used in this unit. The simulation results show the capability of the proposed controller system in controlling local network frequency and superheated steam pressure in the presence of load variations and disturbances. Manuscript profile -
Open Access Article
62 - Neural Control of the Induction Motor Drive: Robust Against Rotor and Stator Resistances Variations and Suitable for Very Low and High Speeds
H. Moayedi Rad M. A. Shamsi-Nejad mohsen FarshadIn this paper, induction motor speed control drive is designed with application two multilayer feed-forward neural networks. That those are used one for generate PWM pulse and other for estimation of required torque and flux information. For trained of the PWM wave gene MoreIn this paper, induction motor speed control drive is designed with application two multilayer feed-forward neural networks. That those are used one for generate PWM pulse and other for estimation of required torque and flux information. For trained of the PWM wave generate neural network is used from compound information two voltage and current classic model. Also, against general classic models for generate of the switching pulses is used as compound from reference voltage and current two motor phases. With these ideas are eliminated problems of the voltage and current classic models (flux saturation in current model for high speeds and voltage drop in voltage model for low speeds). As voltage profile is improved in this paper. The required feedback signals estimation (including: rotor flux, torque, etc.) is estimated by multilayer feed-forward neural network. That for robustness of the above estimator against rotor and stator resistances variations in time work of motor is used from compound trained data of the voltage and current classic models, because the voltage and current of the general classic models to sequence are independent of rotor and stator resistances. The simulation results by MATLAB-Simulink verify the proposed drive in improvement of the speed profile in transient and steady-state operating modes. Also, it verify clearly robust of the proposed drive against rotor and stator resistances variations in time work. Manuscript profile -
Open Access Article
63 - Design and Simulation of Fuzzy-ANFIS Controller for Continuous Control of Transmitted Power by TCSC
A. Kargar M. HosseinzadehControl of transmitted active power is an important issue in operation and management of power systems especially in congestion or fault conditions. In these situations, Thyristor Controlled Series Capacitor (TCSC) is used to continuous control and increase the transmit MoreControl of transmitted active power is an important issue in operation and management of power systems especially in congestion or fault conditions. In these situations, Thyristor Controlled Series Capacitor (TCSC) is used to continuous control and increase the transmitted power due to these facts that TCSC can act dynamically and is able to stable the system during fault conditions. In this paper, the transmitted power is controlled in the ten megawatt span by using the TCSC. For this purpose, various controllers such as PID, fuzzy and Adaptive Network-based Fuzzy Interface System (ANFIS) are designed to continuous control of the transmitted power. Simulation results evaluate advantages and disadvantages these controllers. ANFIS controller is designed by open loop method which has a good transient response. However, it has a large steady state error and is very sensitive to the variations in system. Fuzzy and ANFIS controllers are combined to remove these defects. The simulation results verify the advantages of the fuzzy-ANFIS controller with respect to the other designed controllers. Manuscript profile -
Open Access Article
64 - A New Algorithm for Fast Mode-Switching and Control of TCSC in Less than Half Cycle A New Algorithm for Fast Mode-Switching and Control of TCSC in Less than Half Cycle
M. Nayeripour M. M. MansuriThyristor Controlled Series Capacitor (TCSC) has been used for various purposes such as power system stability improving and increasing of loadability, loss reduction, line impedance compensation or power flow control. Fast switching of TCSC from capacitive mode to indu MoreThyristor Controlled Series Capacitor (TCSC) has been used for various purposes such as power system stability improving and increasing of loadability, loss reduction, line impedance compensation or power flow control. Fast switching of TCSC from capacitive mode to inductive mode and vice versa following the fault and clearing of it respectively, is an essential key for improving transient and even dynamic stability of power system which have not been considered significantly. In this paper a new algorithm for fast mode-switching and control of TCSC in less than half cycle is proposed for changing capacitive to inductive mode and vice versa in less than half cycle. Simulation results show that the proposed method is faster and more reliable in different conditions than the existing method and can be used more effective in transient and dynamic stability improvement. Manuscript profile -
Open Access Article
65 - Designing a Self-Tuning Frequency Controller Based on ANNs for an Isolated Microgrid
F. Habibi H. Bevrani J. MoshtagIncreasing electrical energy demand, as well as fossil fuel shortages and environmental concerns have caused to use uncommon sources such as distributed generations (DGs) and renewable energy sources (RESs) into modern power systems. A microgrid (MG) system consists of MoreIncreasing electrical energy demand, as well as fossil fuel shortages and environmental concerns have caused to use uncommon sources such as distributed generations (DGs) and renewable energy sources (RESs) into modern power systems. A microgrid (MG) system consists of several DGs and RESs which is responsible to provide both electrical and heat powers for local loads. Due to the MGs nonlinearity/complexity which is imposed to the conventional power systems, classical and nonflexible control structures may not represent desirable performance over a wide range of operating conditions. Therefore, more flexible/intelligent control methods are needed most of the past. Hence, in this paper addresses to design an online/self-tuning PI-controller based on artificial neural networks (ANNs) for optimal regulating the MG systems frequency. Manuscript profile -
Open Access Article
66 - Adaptive Control of Pitch Angle of Wind Turbine Using Human Brain Mechanisms of Emotional Learning
M. Hayatdavudi mohsen Farshad H. R. Najafi R. Sedaghati M. JoorabianThe purpose of this paper is optimal location of distributed generation in electric distribution networks. Load uncertainty and desired voltage range has been modeled using fuzzy data theory. The objective function includes loss reduction, improvement of profile index a MoreThe purpose of this paper is optimal location of distributed generation in electric distribution networks. Load uncertainty and desired voltage range has been modeled using fuzzy data theory. The objective function includes loss reduction, improvement of profile index and voltage stability index with their relevant constraints, voltage constraints and transmittable power from the line. Load variation has been shown for three different time durations (peak, off peak and average).PSO technique has been used to optimize the objective function while Max-Min method has been applied to select the answer. Results produced from the proposed model have been provided in 5 different scenarios on a 33 bus system of IEEE. Manuscript profile -
Open Access Article
67 - Design and Application of Parallel Four-Leg Inverters Sharing Nonlinear and Unbalance Loads
M. Hosseinpour M. Mohamadian A. Yazdian VarjaniThis paper investigates the performance of four-leg parallel inverters sharing unbalanced and nonlinear loads. An inner current and external voltage control loops are considered to control the parallel four-leg inverters. In this paper, a proportional controller for the MoreThis paper investigates the performance of four-leg parallel inverters sharing unbalanced and nonlinear loads. An inner current and external voltage control loops are considered to control the parallel four-leg inverters. In this paper, a proportional controller for the current internal loop as well as a proportional-resonant one for the voltage external loop are considered to support the proper performance of the system. The proposed system is able to feed balanced, unbalanced, and nonlinear loads and provides an appropriate sinusoidal voltage waveform for loads by accurately sharing power between the parallel inverters. Simulation results verify the accurate and proper performance of the proposed system. Manuscript profile -
Open Access Article
68 - A Control approach with Controllable Response Time for Power Control of the Power Electronic Based Distributed Generation Resources in Microgrids
E. Zare Abandankeshi مجید شهابیMost wind turbines, photovoltaic and fuel cells need a DC/AC converter as an interface for connection to the main grid. Power electronics based distributed generation resource has two parts: power circuit and control circuit of converter. In this paper, a new method whi MoreMost wind turbines, photovoltaic and fuel cells need a DC/AC converter as an interface for connection to the main grid. Power electronics based distributed generation resource has two parts: power circuit and control circuit of converter. In this paper, a new method which is based on current control by using internal model control method is presented, in order to control active and reactive power of power electronics interfaced distributed generation resource. The main benefit of using internal model control method is that it can reduce number of required parameters for PI controller tuning to one parameter which is desired closed-loop band width (). It should be mentioned that parameter can be computed regarding response rise time. Therefore, values of KI and KP can be determined with the selection of desired band width. So, the system can be designed just with the selection of one parameter (rise time tr). The proposed control method can be used in micro-grids containing power electronic interfaced DGs, in both modes of operation (connected to grid and islanded micro-grid). Manuscript profile -
Open Access Article
69 - Unity Power Factor MPPT for PMSG Wind Turbines Equipped with Matrix Converter
A. Nateghi H. Kazemi KaregarIn this paper, a new control method is proposed for extracting the maximum power of wind turbines equipped with Permanent Magnet Synchronous Generator (PMSG), which is connected to the grid via a matrix converter. The method calculates the optimal rotation speed of wind MoreIn this paper, a new control method is proposed for extracting the maximum power of wind turbines equipped with Permanent Magnet Synchronous Generator (PMSG), which is connected to the grid via a matrix converter. The method calculates the optimal rotation speed of wind turbine and finds the optimal operation point by hill climbing method. The proposed method is simple and it does not need to use some complex methods such as field oriented and rotor position estimation. Wind turbine speed, electrical torque and consequently maximum output power of wind turbine are obtained by the perfect control of output phases and amplitudes of matrix converter. Moreover, the maximum power is injected to the grid under unity power factor. The proposed method is simulated in MATLAB programming software and the obtained results approve the validity of the method. Manuscript profile -
Open Access Article
70 - Control of the Interference and Increasing Capacity by Creating a Phase Difference between the Signals Sent in LTE Network
H. Mirsalari N. NedaAccording to the entry of new networks such as LTE and WiMAX that is based OFDM in country, the need to research and evaluate the performance of these networks is inevitable. In this paper we investigated the performance of different frequency allocation schemes in an L MoreAccording to the entry of new networks such as LTE and WiMAX that is based OFDM in country, the need to research and evaluate the performance of these networks is inevitable. In this paper we investigated the performance of different frequency allocation schemes in an LTE network. We first introduced the frequency allocation schemes include Reuse-1, Reuse-3, partial frequency reuse, sectoring, cell division region and soft frequency reuse, and then by creating a phase difference between two signals in a MISO channel in standard LTE, and combine it with some of these schemes such as sectorization and cell division region with the sectoring interference will significantly decreased in such networks. The simulation results show that the phase differences between the signals(which it’s called the one pre-order scheme) in MISO channel, due to the rotation of the antenna radiation pattern depending on the position of mobile users, and also the soft frequency reuse scheme for the full allocation of OFDM carriers to each cell and sending with less power for users of the cell center, leads to the substantial gain in the total network capacity, under the different traffics. Manuscript profile -
Open Access Article
71 - Topology Control in Wireless Sensor Networks Using Two-Level Fuzzy Logic
A. Abdi Seyedkolaei A. ZakerolhosseiniWireless sensor networks are a new generation of networks that from sensors uses to get information about itself environment and communication this sensors is as wireless. One of the issues that is very important in wireless sensor networks is Discussion reducing energy MoreWireless sensor networks are a new generation of networks that from sensors uses to get information about itself environment and communication this sensors is as wireless. One of the issues that is very important in wireless sensor networks is Discussion reducing energy consumption and increasing network lifetime. Topology control is one of the methods to reduce energy consumption and increase the lifetime of the network. Since different methods of topology control, to reduce energy consumption and enhance the network lifetime is proposed that including them is the clustering and one of the most famous clustering methods is LEACH. In this paper, we try to present a new clustering method that is superior compared to leach and other improved methods after the LEACH. we use in our clustering method from two-level fuzzy logic that be causing reduce energy consumption and increase the network lifetime compared to other methods and to prove the superiority of our method compared with other methods, we present a comparison using MATLAB software. Manuscript profile -
Open Access Article
72 - Classical Direct Torque and Flux Control (DTFC) for Line-Start Permanent Magnet Synchronous and Its Comparison with Induction Motors During Voltage Sag Conditions
M. Hosseinzadeh A. SadoughiThis study compares Direct Torque Flux Control (DTFC) performance of a three-phase Induction Motor (IM) and its equal Line-Start Permanent Magnet Synchronous Motor (LSPMSM). Simulation results of line-starting DTFC method of an IM and its equal LSPMSM (for both normal a MoreThis study compares Direct Torque Flux Control (DTFC) performance of a three-phase Induction Motor (IM) and its equal Line-Start Permanent Magnet Synchronous Motor (LSPMSM). Simulation results of line-starting DTFC method of an IM and its equal LSPMSM (for both normal and voltage sag conditions) is compared and analyzed. In addition, field weakening region is evaluated. The advantages of the discussed control strategy over line-starting are also investigated for LSPMSM. Manuscript profile -
Open Access Article
73 - Design of Wide Area SVC Robust Controller for Damping Inter-Area Oscillations of a Power System
سعید اباذری A. Arab Dardori M. Barkhordari Yazdi M. S. PayamIncreasing power transfer capability of existing transmission lines is one of the key issues in the power systems. Inter-area oscillations have effect on the power transfer capability and decrease the network efficiency. On the other hand, FACTS devices can be used to i MoreIncreasing power transfer capability of existing transmission lines is one of the key issues in the power systems. Inter-area oscillations have effect on the power transfer capability and decrease the network efficiency. On the other hand, FACTS devices can be used to increase the power transfer capability by damping the inter-area oscillations. This paper proposes a Linear Matrix Inequality (LMI) based robust controller design to generate an additional stabilizing signal for a Static VAR Compensator (SVC) in order to increase damping of the inter-area modes. Wide Area Measurement (WAM) has been employed by the controller which is designed based on the H∞ mixed-sensitivity synthesis method. The effectiveness of the method is investigated by a test system consisting of 16 numbers of generators, 68 buses and 5 areas. The results show good and robust performance of the controller in damping the oscillations. Manuscript profile -
Open Access Article
74 - Control of Grid-Connected Inverter in Stationary Reference Frame with Harmonic Compensation Capability
M. Shahparasti M. Mohamadian A. Yazdian VarjaniDue to increasing number of inverter based distributed generation resources in electric power systems, improving the quality and performance of them are necessary. In this paper a new current scheme is presented to inject sinusoidal current to the grid with following gr MoreDue to increasing number of inverter based distributed generation resources in electric power systems, improving the quality and performance of them are necessary. In this paper a new current scheme is presented to inject sinusoidal current to the grid with following grid voltage conditions: sinusoidal voltage, distorted voltage and unbalance voltage. The proposed control scheme includes two sections: 1) Determination of sinusoidal reference current considering grid voltage condition; 2) current controller to track reference current. The proposed reference current determination algorithm in comparison with other algorithms, such as Park method is implemented easier and has faster dynamic response. The proposed current controller is implemented in the stationary reference frame and does not require the use of multiple controllers and coordinate transforms to compensate the harmonics. This control strategy needs tuning of only one variable, hence compared with other control methods requires less computational burden for practical implementation. Simulation results confirm the effectiveness of the proposed control method. Manuscript profile -
Open Access Article
75 - Application of Epsilon Variable-Multi Objective Genetic Algorithm for Multi-Objective Optimal Power Flow with TCSC
E. Afzalan M. JoorabianThis paper ε-multi objective genetic algorithm variable (εV-MOGA) to optimize cost of generation, emission and active power transmission loss of flexible ac transmission systems (FACTS) device-equipped power systems. In the proposed approach, optimal power flow problem MoreThis paper ε-multi objective genetic algorithm variable (εV-MOGA) to optimize cost of generation, emission and active power transmission loss of flexible ac transmission systems (FACTS) device-equipped power systems. In the proposed approach, optimal power flow problem is formulated as a multi-objective optimization problem. FACTS devices considered include thyristor controlled series capacitor (TCSC). The proposed approach has been examined and tested on the modified IEEE 57-bus test system. The results obtained from the proposed approach have been compared with those obtained from nondominated sorting genetic algorithm-II, multi-objective differential evolution. Manuscript profile -
Open Access Article
76 - Lateral Stabilization of a Four Wheel Independent Drive Electric Vehicle Using a Three Layer Controller and Sliding Mode Control
H. Alipour M. Sabahi M. B. B. SharifiaIn this paper, a new controller, for lateral stabilization of four wheel independent drive type electric vehicles without mechanical differential, is proposed. The proposed controller has three levels includes high, medium and low control level. Desired vehicle dynamics MoreIn this paper, a new controller, for lateral stabilization of four wheel independent drive type electric vehicles without mechanical differential, is proposed. The proposed controller has three levels includes high, medium and low control level. Desired vehicle dynamics such as reference longitudinal speed and reference yaw rate are determined by higher level of controller. In this paper, a new sliding mode controller is proposed and its stability is proved by Lyapunov stability theorem. This sliding mode control structure is faster, more accurate, more robust, and with smaller chattering than common sliding mode controllers. Based on the proposed sliding mode controller, the medium control level is designed to determine the desired traction force and yaw moment. In the lower level controller, suitable wheel forces and torques are calculated by an optimal cost function minimizing. Finally, the effectiveness of the introduced controller is investigated through conducted simulations Manuscript profile -
Open Access Article
77 - Robust Tracking by Using Measure Theory
A. Zare A. Khaki-Sedigh A. VahidianThis paper presents two new approaches for robust step tracking in structure uncertain nonlinear systems. The problem is first restated as a non linear optimal control infinite horizon problem, then with a suitable change of variable, the time interval is transfer to th MoreThis paper presents two new approaches for robust step tracking in structure uncertain nonlinear systems. The problem is first restated as a non linear optimal control infinite horizon problem, then with a suitable change of variable, the time interval is transfer to the finite horizon [0 1). This change of variable, poses a time varying problem. This problem is then transfer to measure space, and it is shown that an optimal measure must be determined which is equivalent to a linear programming problem with infinite dimension. Then, using finite horizon approximations, the optimal control law is determined as a piece wise constant function. Simulations are provided to show the effectiveness of the proposed methodology Manuscript profile -
Open Access Article
78 - Dual Loop Control of 400 Hz Inverter for Ground Power Units
M. Nouri H. Iman-EiniIn this paper dual-loop control method is proposed for control of 400 Hz inverter. Resonant controllers are used in the outer loop to regulate the amplitude of fundamental harmonic and to remove the unwanted harmonics. To avoid phase delay and bandwidth degradation, pro MoreIn this paper dual-loop control method is proposed for control of 400 Hz inverter. Resonant controllers are used in the outer loop to regulate the amplitude of fundamental harmonic and to remove the unwanted harmonics. To avoid phase delay and bandwidth degradation, proportional controller is used as the inner control loop. In this paper, hybrid digital design in discrete- and continuous-time domain is introduced to design the inner and outer control loops. To decouple the control system from the load current disturbances and to improve the dynamic performance, a feed-forward path is added to the dual-loop control structure. To reduce the noise of feed-forward path, a soft-derivative term is introduced which is optimized for 400 Hz frequency. To verify the system performance, several simulations have been carried out which shows satisfactory results under dynamic and steady state conditions. Finally, the experimental results of a 20 kVA hardware prototype is presented to confirm the validity of theoretical and simulation results. Manuscript profile -
Open Access Article
79 - Optimal Power Flow in the Smart Distribution Grid Based on the Optimal Load Curtailment and Voltage Stability Index Improvement
S. Derafshi Beigvand H. AbdiSmart grid is the result of enabling consumers in the power system in order to play an effective role in the power system planning and operation processes. The communication, control, and measurement infrastructures create a two-way intelligent communication between use MoreSmart grid is the result of enabling consumers in the power system in order to play an effective role in the power system planning and operation processes. The communication, control, and measurement infrastructures create a two-way intelligent communication between users and the network which facilitates the effective implementation of demand response programs (DRPs) such as the direct load control (DLC). In this paper, optimal power flow as an important research topic in the power systems is presented based on DLC and a new voltage stability index. Simple calculations, voltage dependence, indirect dependence to the load and network topology, and also not reducing the network into a two-bus equivalent model, have made the proposed voltage stability index more applicable to real-time calculations considering the load pattern changes. In the proposed method, the optimal load curtailment in some selected loads of the network, with the aim of improving the voltage stability index of the weakest bus is evaluated. Finally, in order to show the effectiveness of the suggested method, it is applied to a 69-bus radial distribution network as an intelligent system. Manuscript profile -
Open Access Article
80 - Designing an Applicable MIMO DC-DC Converter with Multivariable Controller for SMES System
M. R. Alizadeh Pahlavani S. Taghipour BroujeniIn modern power systems, utilization of renewable energy sources makes some difficulties for the power grid. One of these problems is shortage of electrical power during conditions which renewable energy sources cannot generate electrical power. For example, during shad MoreIn modern power systems, utilization of renewable energy sources makes some difficulties for the power grid. One of these problems is shortage of electrical power during conditions which renewable energy sources cannot generate electrical power. For example, during shading conditions, the output power of the PV array is negligible. Using SMES (Superconducting Magnetic Energy Storage) systems is one of the applicable solutions which has been proposed to solve mentioned problem. In SMES system, energy is stored at high power inductances and during critical conditions; this power can be delivered to the load. One of the important parts of SMES systems is Multi input - Multi Output (MIMO) DC-DC converter. In this paper, at first step, one topology has been designed for the MIMO DC-DC converter. This topology has remarkable advantages such as fewer electrical elements and better controllability than other topologies. In the second part of this paper, based on multivariable controller strategy, an efficient controller has been designed for the SMES system which can set the output voltages of DC-DC converter at predetermined values. The most important feature of proposed controller is its efficiency at different conditions which some of these conditions make serious problems for conventional controllers. Generally, the objective of this paper is designing one SMES systems with an appropriate controller, which can regulate the output voltages at different conditions. Manuscript profile -
Open Access Article
81 - Design and Implementation of a New Adaptive Sliding Mode for Current Control in Islanding Mode Operation
M. M. Ghanbarian M. Nayeripour A. H. RajaeiThis paper proposes a new modified adaptive sliding mode controller in order to control the inverters of DGS in the voltage and current (power) control modes in a microgrid. An observer is used to estimate the uncertain parameters in controller design and considering t MoreThis paper proposes a new modified adaptive sliding mode controller in order to control the inverters of DGS in the voltage and current (power) control modes in a microgrid. An observer is used to estimate the uncertain parameters in controller design and considering these estimated values, the controller is adapted to new condition. In the power management strategy, one of inverter controls the voltage and the other inverter controls the load current and balances the active power. Due to delays in startup power electronic converter and sliding mode controller, the result of controller implementation with classical controllers does not meet the requirement and so, considering these delays with adaptive controller, the performance will be improved considerably and the reference signal will be tracked with lower steady state error in comparison with classical sliding mode controller. Moreover, this controller reduces the total harmonic distortion and improves the rms and peak value tracking. Implementation of system using DSP/TMS320F28335 as well as MATLAB simulation validates the performance of system in different conditions. Manuscript profile -
Open Access Article
82 - Optimal Operation of Energy Hub Using Model Predictive Control
Z. Hashemi A. Ramezani M. Parsa-MoghaddamEnergy hub (EH) concept is widely proposed for integrating different types of energy infrastructures. EH physically consists of some storage systems and converters receiving energy from multiple sources immediately from its upper grids and provides energy services for u MoreEnergy hub (EH) concept is widely proposed for integrating different types of energy infrastructures. EH physically consists of some storage systems and converters receiving energy from multiple sources immediately from its upper grids and provides energy services for ultimate consumers. In this paper a state space model for EH system is proposed. Due to the dynamic behavior loads and the price uncertainties, a Model Predictive Control approach is suggested for optimal performance. The proposed method is studied on a EH that consists of transformer, boiler, CHP, electrical and heat storages considering demand side management. Finally, the simulation results depicts to demonstrate the effectiveness of the proposed method for optimal operation of the EH. Manuscript profile -
Open Access Article
83 - A Hybrid Access Control Model for CIM-Based SCADA System
P. Mahmoudi Nasr A. Yazdian VarjaniInsider attack is one of the most dangerous threats for the security of a critical infrastructure (CI). An insider attack occurs when an authorized operator misuses his/her permissions in order to perform malicious operations in the CI. Providing too many permissions fo MoreInsider attack is one of the most dangerous threats for the security of a critical infrastructure (CI). An insider attack occurs when an authorized operator misuses his/her permissions in order to perform malicious operations in the CI. Providing too many permissions for an operator may backfire when the operator abuses his/her privileges, either intentional or unintentional. Therefore, an access control model is required to provide necessary permissions in order to prevent malicious operations. In this paper, a hybrid access control model (HAC) has been proposed for CI applications which are monitored and controlled by a CIM (IEC-61970-301 common information model)-based supervisory control and data acquisition system. The proposed HAC is an extension of the mandatory and role-based access control models. In the proposed model, the permissions of an operator will be determined according to the predefined types of responsibilities, grid statuses, activation times of roles, security levels, and their periods of validity. A colored Petri-net is employed to simulate and illustrate the effectiveness of the proposed HAC. Manuscript profile -
Open Access Article
84 - A Control Strategy Presentation for DG Resources Power Injection in Order to Reduce Harmonic Distortion and Unbalanced Current Simultaneously Based on EMO-RLS Algorithm
F. Faghihi soodabeh Soleymani M. Mollazadeh ShahroudiIn this paper a control technique for renewable energy resources–grid interface is proposed based on extended multi output-recursive least square (EMO-RLS) algorithm considering active power management and harmonic, unbalanced and reactive current components elimination MoreIn this paper a control technique for renewable energy resources–grid interface is proposed based on extended multi output-recursive least square (EMO-RLS) algorithm considering active power management and harmonic, unbalanced and reactive current components elimination. The proposed method is evaluated via MATLAB/SIMULINK software. Firstly, an artificial three-phase unbalanced harmonic signal is generated. It will be transmitted to different estimators for their outputs comparison. The results indicate proper performance of the suggested structure for active harmonic symmetrical components analysis in comparison with the other traditional methods. Also, its dynamic operation in tracking of load current variations is evaluated employing EMO–RLS algorithm for control system of a DG source interface. It illustrates the active power injection to the grid is managed, as well as the harmonic, unbalance and reactive current components, are decreased simultaneously. Manuscript profile -
Open Access Article
85 - An Improved Grid Connected Transformerless Inverter with Proportional Resonant Controller
J. Fallah Ardashir M. Sabahi S. H. Hosseini E. Babaei G. GharehpetianThe grid tied PV systems without transformer have some benefits such as low cost, weight and size and also increases the overall efficiency. The galvanic connection between the grid and PV system causes leakage current in the transformerless inverter to flow through pa MoreThe grid tied PV systems without transformer have some benefits such as low cost, weight and size and also increases the overall efficiency. The galvanic connection between the grid and PV system causes leakage current in the transformerless inverter to flow through parasitic capacitors between the PV system and ground and causes personal safety problems, increases the output harmonic spectrum, and system losses. This paper introduces a modified single phase two stage transformerless inverter for grid connected photovoltaic systems with low leakage current. The neutral of the grid is directly connected to the negative terminal of PV panel that eliminates leakage current without complex control strategy. In this paper, a Proportional Resonant (PR) control strategy is used to control the injected current. The performance of the transformerless inverter is analyzed and its structure has been simulated in PSCAD/EMTDC and the obtained results tested experimentally. Manuscript profile -
Open Access Article
86 - Speed Control of Matrix Converter-Fed Five-Phase Permanent Magnet Synchronous Motors under Unbalanced Voltages
B. Yousefi S. Soleymani B. Mozafari S. A. GholamianFive-phase permanent magnet synchronous motors (PMSM) are often used for specific applications, in which the precise speed control of the motor by an appropriate driver design is important. The use of three-phase to five-phase matrix converter is a suitable technique fo MoreFive-phase permanent magnet synchronous motors (PMSM) are often used for specific applications, in which the precise speed control of the motor by an appropriate driver design is important. The use of three-phase to five-phase matrix converter is a suitable technique for constructing such a motor driver. Since the input voltages of such converters are directly supplied by input three-phase supply voltages, an imbalance in the voltages will cause problems such as unbalanced stator currents and electromagnetic torque fluctuations, making it inefficient to use such converters. In this paper, a new method is proposed to remove torque oscillator factors based on direct power control (DPC). In this way, a number of features including speed, torque, and flux of the motor will improve in terms of the above-mentioned conditions. Simulations are analyzed using Matlab/Simulink software. Manuscript profile -
Open Access Article
87 - Design and Analysis of a Novel Robust and Fast Sliding-Mode Control with Multi-Slope Sliding Surface for Single-Phase Three Level NPC Inverters under Different Loads and Reduce the Output THD
B. Khajeh-Shalaly G. ShahgholianIn this paper control structure with robust performance in presence of parametric uncertainties of the converter in order to improve pure sinusoidal inverter in whole functional and loading conditions is rendered. The controller guarantees fast and accurate behavior of MoreIn this paper control structure with robust performance in presence of parametric uncertainties of the converter in order to improve pure sinusoidal inverter in whole functional and loading conditions is rendered. The controller guarantees fast and accurate behavior of the converter in order to increase the output voltage quality and reduce output harmonics. This controller by sliding performance and utilizing output voltage and capacitor current used in the control process, not only has exact output voltage tracking from reference but also has ability to reject the periodic disturbances due to loading. Also, it guides error states to zero rapidly and makes transient states of the converter as well as possible at error moments that is the same high spikes and loads in output current. Another characteristic of the proposed controller is, improved stability region under wide ranges of loading in different conditions. Accuracy of proposed controller on a single-phase three level NPC inverter which has high sensitivity in control in order to increase quality, decrease harmonics and THD output has been compared with a single-slope sliding mode controller with the sane loading conditions and reference. The simulations results are obtained by MATLAB. Manuscript profile -
Open Access Article
88 - An Adaptive Incremental Conductance MPPT Based on BELBIC Controller in Photovoltaic Systems
S. Azimi Sardari B. Mirzaeian Dehkordi M. NiroomandMany conventional incremental conductance (INC) methods are applied for maximum power point tracking (MPPT) of photovoltaic arrays. Where, the optimization step size determines the speed of MPPT. Fast tracking could be achieved with bigger increments but the system migh MoreMany conventional incremental conductance (INC) methods are applied for maximum power point tracking (MPPT) of photovoltaic arrays. Where, the optimization step size determines the speed of MPPT. Fast tracking could be achieved with bigger increments but the system might not operate properly at the MPP and might become oscillated at this point; therefore, there is a trade-off between the time needed to reach the MPP and the oscillation error. This article is to present an adaptive optimization step size in the INC to improve solar array performance. To adjust the MPP in the photovoltaic (PV) operation point, brain emotional learning based intelligent controller (BELBIC) is applied as an adaptive optimization step size in the INC. This would considerably increase the system's accuracy. The effectiveness of this proposed method is verified by comparing its simulation and experimental results with the conventional methods in different operating conditions. Manuscript profile -
Open Access Article
89 - Torque and Flux Ripple Elimination in DTC Control of PMSM Motors using Duty Cycle Control of Voltage Vectors
V. Ghasemian S. A. Gholamian S. M. MirimaniThis paper presents a novel method for controlling torque and stator flux ripples in DTC control of PMSM motor. In contrast to conventional duty ratio modulation methods which do not pay attention to stator flux condition, the proposed method controls both torque and st MoreThis paper presents a novel method for controlling torque and stator flux ripples in DTC control of PMSM motor. In contrast to conventional duty ratio modulation methods which do not pay attention to stator flux condition, the proposed method controls both torque and stator flux RMS ripples using minimization of a proper two variable (stator flux and torque) objective function. After realizing that, flux related machine specifications such as circular stator flux vector trajectory and current waveform quality will be developed. For this purpose, in addition to torque dynamics in any DTC control cycle, stator flux dynamics will be studied. Using this, the condition of both torque and stator flux at the end of an applied voltage vector of inverter is predicted. Then, standard deviation of torque RMS ripple and that of stator flux is studied in any control cycle and the normalized sum of these two deviations will be considered as the objective function. Finally, a proper switching instant during any control cycle is calculated for minimizing the objective function. The proposed method is validated by MATLAB simulation. Manuscript profile -
Open Access Article
90 - Direct Torque Control of Low Voltage Three Phase Induction Motor Using Three-Level Ten-Switch Inverter
M. Shahparasti Mohammad FarziIn this paper a new topology of three-level inverters with ten-switch is proposed to control low voltage three phase induction motor. Ten-switch inverter is a reduced-switch-count three level inverter which compared to conventional topologies such as NPC, CHB and flying MoreIn this paper a new topology of three-level inverters with ten-switch is proposed to control low voltage three phase induction motor. Ten-switch inverter is a reduced-switch-count three level inverter which compared to conventional topologies such as NPC, CHB and flying capacitor has lower count of semiconductor switches. Thus, it enjoys from lower cost, lower volume and lower weight. In this paper, a direct torque control (DTC) scheme based on switching table is developed to control a ten switch inverter. Simulation results of controlling induction motor fed by a conventional two-level inverter, NPC and proposed 10 switch inverter are presented and they are compared together in different aspects. Results confirm the effectiveness of the proposed topology and its control method. Manuscript profile -
Open Access Article
91 - Sensorless Field Oriented Control of DFIGs Using a Rotor-Current-Based MRAS Observer under Grid Voltage Dip
A. Hasani R. KianinezhadThis paper proposes a new application of sensorless control method for doubly fed induction generator (DFIG) using rotor-current-based MRAS observer (RCMO) under grid voltage dip. MRAS means model reference adaptive system. In this paper the method of control of DFIG is MoreThis paper proposes a new application of sensorless control method for doubly fed induction generator (DFIG) using rotor-current-based MRAS observer (RCMO) under grid voltage dip. MRAS means model reference adaptive system. In this paper the method of control of DFIG is vector control VC (or field oriented control FOC). The position and speed of rotor are estimated by RCMO instead of measuring. DFIG is connected to a grid with a balanced voltage dip on PCC and is tested by large variation in rotor speed. Simulation results using MATLAB/Simulink are presented for a 2-MW DFIG. The simulation results show the decoupled control of active and reactive power of DFIG in three conditions: a) normal voltage of grid b) grid voltage dip c) huge variation at wind speed. The results show that the estimated speed of rotor and power produced in DFIG carefully follows the references. The conclusion of simulation results is that for decoupled control of active and reactive power of DFIG, application of RCMO method is favorable and acceptable under balanced voltage dips and variable speed wind as well as conventional VC. Manuscript profile -
Open Access Article
92 - Analyzing the Optimization Problem of Resource Allocation in SIP Proxies and Providing an Overload Control Algorithm with Max-min Fairness
M. Jahanbakhsh S. V. Azhari V. GhasemkhaniSession Initiation Protocol (SIP) is an application layer protocol designed to create, manage, and terminate multimedia sessions in the IP multimedia subsystem (IMS). The widespread use of this protocol results in high traffic volume over SIP proxies, requiring delicate MoreSession Initiation Protocol (SIP) is an application layer protocol designed to create, manage, and terminate multimedia sessions in the IP multimedia subsystem (IMS). The widespread use of this protocol results in high traffic volume over SIP proxies, requiring delicate CPU allocation to flows. In this paper, we analyze the optimization problem of resource allocation in SIP proxies with two objective functions: maximizing total throughput and minimizing the least squares. Maximizing total throughput, prioritizes intra-domain flows over inter-domain ones, as the latter pass through two intermediate proxies. On the other hand, minimizing the least squares corresponds to a max-min fairness policy. Hence, we use round robin scheduling in proxies. In addition, we propose a SIP overload control algorithm that limits re-transmissions and prevents instability of proxies by controlling the length of SIP message backlog for each flow. This algorithm leads to better use of processing resources, in comparison with existing overload control algorithms. Manuscript profile -
Open Access Article
93 - Double-band Hysteresis Current Controller to Reduce Switching Losses of BLDC Drive and Its Comparison with Single-Band Hysteresis
H. Torkaman M. R. Hassanzadeh AghdamIn this paper, a double-band hysteresis current controller (DBHCC) as a new switching method in feeder inverter of a BLDC motor is proposed and implemented. Then, it is compared with the single-band hysteresis current controller (SBHCC). It has been shown that in the pr MoreIn this paper, a double-band hysteresis current controller (DBHCC) as a new switching method in feeder inverter of a BLDC motor is proposed and implemented. Then, it is compared with the single-band hysteresis current controller (SBHCC). It has been shown that in the proposed method, the average switching frequency of switches is reduced compared to SBHCC by preserving other advantages. Thus, switching losses are reduced and the lifetime of switches is increased. In addition, it has desirable effects on reducing electromagnetic interferences and noise. In addition, speed control, torque, current ripple and transient states are investigated in both states. Three-phase reference currents for hysteresis switching are obtained using a PI regulator and integrating with output signals from Hall-effect sensors. BLDC motors are used widely in the industry due to more advantages in comparison with others. In order to drive this motor, a three-level cascade half-bridge voltage source inverter with constant DC link for each phase is used. Simulation results are obtained and analyzed using MATLAB/Simulink environment. Manuscript profile -
Open Access Article
94 - Predictive Control of Modular Multilevel Converters Using Sphere Decoding Algorithm
H. Shafaiyeh Hiag R. Mahboobi Esfanjani Mohammad HejriModular Multilevel Converters, by increasing the number of voltage levels the quality of output waveform is improved and the semiconductor switches tolerate low voltage values. However, design of switching strategy in these complicated circuits is challenging. In this p MoreModular Multilevel Converters, by increasing the number of voltage levels the quality of output waveform is improved and the semiconductor switches tolerate low voltage values. However, design of switching strategy in these complicated circuits is challenging. In this paper, based on sphere decoding algorithm, a predictive controller with finite control set is proposed to regulate load current while minimizing both capacitor voltage variations and circulating currents. The suggested scheme decreases the computational burden of optimization stage which is considerable for long prediction horizons and modular converters with high number of voltage levels. The suggested scheme is simulated for a practical modular multilevel converter to demonstrate its performance compared to some rival methods. Manuscript profile -
Open Access Article
95 - Performance Analysis of Three Phase Four Leg Boost Rectifier with One Cycle Control Under Unbalanced Loads
M. ArehpanahiHarmonic pollution of source currents and poor power factor are the main challenges of rectifiers. In this paper using one cycle control strategy, rectifiers can be operated at unity power factor. For performance analysis of this method harmonic injection and unbalanced MoreHarmonic pollution of source currents and poor power factor are the main challenges of rectifiers. In this paper using one cycle control strategy, rectifiers can be operated at unity power factor. For performance analysis of this method harmonic injection and unbalanced load applied to the source side considered. Simulation results show that combination of three phase four leg rectifier with one cycle control can be improved power factor and harmonic pollution reduction especially in nonlinear and unbalanced loads in the source side. Manuscript profile -
Open Access Article
96 - LMI Robust Control Design for SIDO Boost Converter Based on SFG Modelling Method
M. Abbasi Mohammad Reza Alizadeh Pahlavani Ahmad AfifiA robust control design process based on a linear Matrix Inequalities (LMI) for a Single Inductor Multi Output (SIMO) boost converter has been presented in this paper. Considering complicated multi-stages operation of SIDO converter, Signal Flow Graph (SFG) modelling wa MoreA robust control design process based on a linear Matrix Inequalities (LMI) for a Single Inductor Multi Output (SIMO) boost converter has been presented in this paper. Considering complicated multi-stages operation of SIDO converter, Signal Flow Graph (SFG) modelling was used to predict all behavior of the converter. Using the SFG model, nonlinearities and uncertainties was modelled as a convex polytope for LMI design constraints. This method guarantees a certain perturbation rejection level and a region of pole location. The derived parameters from LMI were applied on state-feedback coefficients in Matlab/Simulink to show the validity of the presented LMI method. Finally, the obtained results have been compared with a conventional PI controller. Manuscript profile -
Open Access Article
97 - Nonlinear Analysis of Jitter Transfer in Charge Pump Phase-Locked loops regarding Channel Length Modulation Effect
H. Dehbovid H. Adarang M. B. TavakoliDue to the nonlinear behavior caused by the charge pump, charge pump phase-locked loops (CPPLLs) are nonlinear systems. In an ideal charge pump, the applied current is constant; however, in practice, it is not constant due to the transistor's non-ideal effects. In this MoreDue to the nonlinear behavior caused by the charge pump, charge pump phase-locked loops (CPPLLs) are nonlinear systems. In an ideal charge pump, the applied current is constant; however, in practice, it is not constant due to the transistor's non-ideal effects. In this paper, regarding the transistor's channel length modulation effect (CLM) on charge pump’s current, the non-linear differential equation of the system is obtained and shows that the phase lock loop is a nonlinear system with memory and Voltaire Series expansion can be used to analyze it. As a result, a method for estimating a jitter transfer with a second-order filter is proposed. System level simulation is used to validate the analytical results with particular emphasis on the jitter transfer characteristics. The effect of different loop parameters has also been studied. The experiments all show excellent conformance between analytical equations and simulation results. Manuscript profile -
Open Access Article
98 - Power Control and Subchannel Allocation in OFDMA Macrocell-Femtocells Networks
H. Davoudi M. RastiHeterogeneous networks, including macrocell and femtocell, cause to increase network capacity. Also, they improve quality of offers services to users in cellular networks. Common subchannel allocation among different tier users, make cross-tier interference among users. MoreHeterogeneous networks, including macrocell and femtocell, cause to increase network capacity. Also, they improve quality of offers services to users in cellular networks. Common subchannel allocation among different tier users, make cross-tier interference among users. Since macrocell users have priority to femtocell ones, presence of femtocell users should not prevent macrocell users to access minimum quality-of-service. In this paper, a power control and subchannel allocation scheme in downlink transmission an orthogonal frequency division multiple access (OFDMA) based two tier of macrocell and femtocell is proposed, aiming the maximization of femtocell users total data rate, in which the minimum QOS for all macrocell users and femtocell delay-sensitive users is observed. In macrocell tier, two different problems are considered. The first problem aim to maximizing the total threshold of tolerable cross-tier interference for macrocell users and the second problem’s goal is minimizing the macrocell’s total transmission power. For the femtocell tier, maximizing the users total data rate is the objective. Hungrian method, an assignment optimization method, is used for solving the first problem in macrocell tier. Moreover, in order to solve the second problem a heuristic method for subchannel allocation is proposed and dual Lagrange method is used for power control. In addition, in order to solve the problem for femtocell tier, a heuristic method is used for subchannel allocation. Subsequently, a dual Lagrange method which is one of the convex optimization problem solver is used, so that we can control the power. Finally, an extend simulations are performed to validate the performance of the proposed method. Manuscript profile -
Open Access Article
99 - Design and Construction of High-Current Line-Commutated Rectifier Based on Parallel Thyristors
M. Shahparasti Mohammad Farzi M. Arefian R. Asad M. Sharei-pourThis paper presents the process of designing and manufacturing a high-current line-commutated rectifier, which consists of six high current valves. Every valve is constructed through the parallelization of the four thyristors. The design of the physical structure, the p MoreThis paper presents the process of designing and manufacturing a high-current line-commutated rectifier, which consists of six high current valves. Every valve is constructed through the parallelization of the four thyristors. The design of the physical structure, the placement of busbars, and the arrangement of parallel thyristors are made using an innovative technique so that the current flows equally between them. To ensure equal flow distribution, in addition to the design of hardware structure and the use of suitable methods for simultaneous and accurate triggering of parallel thyristors, a new control technique based on the temperature measurement of each thyristor is proposed. Finally, the experimental results of a 170V, 4000A rectifier are presented to verify the proposed hardware design and control method. Manuscript profile -
Open Access Article
100 - Global Hybrid Modeling and Control of a DC-DC Buck-Boost Converter via Mixed Logical Dynamical Systems
Mohammad HejriThis paper presents a new model for a DC-DC buck-boost converter considering its all controlled and uncontrolled switching phenomena in both continuous and discontinuous conduction modes. The proposed model is developed based on hybrid systems theory using mixed-logical MoreThis paper presents a new model for a DC-DC buck-boost converter considering its all controlled and uncontrolled switching phenomena in both continuous and discontinuous conduction modes. The proposed model is developed based on hybrid systems theory using mixed-logical dynamical (MLD) systems, and an improved version of these systems called as extended mixed-logical dynamical (EMLD) Systems. Compared to the existing MLD and EMLD models of the DC-DC converters, the proposed model contains fewer numbers of integer variables and inequalities, and, as a result, leads to the less complexity and solution time of the mixed integer optimization problems arising from the corresponding hybrid model predictive controllers. The advantage of the proposed modeling and control method is evaluated via the comparison of the existing MLD models and hybrid predictive controllers as well as classic proportional-integral (PI) controllers. Moreover, the theoretical challenges for the closed-loop stability proof are discussed and in this regard some future research outlines and ideas are introduced. The steady state and transient performance of the closed-loop control system over a wide range of the operation points show the satisfactory operation of the proposed modeling and control scheme for the DC-DC buck-boost converter. Manuscript profile -
Open Access Article
101 - Low Phase-Noise and Strong Start-Up Condition Voltage Controlled Oscillator for K Band Applications
مصطفی کاتبی A. Nasri S. Toofan H. ZolfkhaniThis paper presents a voltage controlled oscillator (VCO) based on a cross-coupled pair and Colpitts structures for K-band applications. By employing cross-coupled pair and Colpitts structures, the dc power consumption and phase noise was reduced. By using inductors bet MoreThis paper presents a voltage controlled oscillator (VCO) based on a cross-coupled pair and Colpitts structures for K-band applications. By employing cross-coupled pair and Colpitts structures, the dc power consumption and phase noise was reduced. By using inductors between cross-coupled pair and Colpitts structures, the effective transconductance was enhanced and robust the start-up condition. In order to cover a wide frequency tuning range, a capacitor bank was used. The VCO has been designed and simulated in TSMC 0.18 µm CMOS technology. Simulation results showed that the simulated phase noise of center frequency (24.25 GHz), at 1-MHz offset frequency is-120 dBc/Hz and the figure of merit is -195.67 dBc/Hz. The covering frequency range and tuning range of this VCO are 1.4 GHz and 5.7%, respectively. The occupied area of the layout is 335 µ2m and the power consumption of this VCO was 15.92 mW from 1.5 V supply voltage. Manuscript profile -
Open Access Article
102 - Control and Power Management of Combined Wind-Microturbine Generation System in Stand-Alone Applications
Ahmad Reza Atapoor محسن رحیمی Allahyar AkhbariThis paper deals with the performance investigation and control of a combined wind-microturbine generation system at off-grid and stand-alone applications. As the novelty, in this paper, the wind turbine does not always work at the MPPT mode, and depending on the availa MoreThis paper deals with the performance investigation and control of a combined wind-microturbine generation system at off-grid and stand-alone applications. As the novelty, in this paper, the wind turbine does not always work at the MPPT mode, and depending on the available wind power and load demand, two operation modes for the wind turbine are defined: power control mode (MPPT mode) and voltage control mode. At the conditions that the available wind power is less than the load demand, the wind turbine operates at the MPPT mode and microtubule provides the rest of the load power. Once the available wind power goes beyond the load demand, the microturbine can not absorb the additional power, and wind turbine works at load following mode. In this mode, the wind turbine power is less than the available wind power and is identical to the load demand, and the microturbine power is negligible. At the end, by performing simulations at the Matlab-Simulink environment, performance of the study system at different operating conditions is investigated. Manuscript profile -
Open Access Article
103 - Robust Optimal Stable Fuzzy Controller Design for Stabilization of Electric Vehicle Speed, in Presence of Parametric Uncertainties and External Disturbances
Mohammad Veysi M. Shasadeghi M. R. SoltanpourIn electric vehicle’s nonlinear dynamic equations, some parameters has uncertainty such as the coefficient of rolling resistance, drag coefficient, armature resistance and field winding resistance. Design of a controller that is robust in the presence of these parametri MoreIn electric vehicle’s nonlinear dynamic equations, some parameters has uncertainty such as the coefficient of rolling resistance, drag coefficient, armature resistance and field winding resistance. Design of a controller that is robust in the presence of these parametric uncertainties and also in presence of external disturbances, and on the other hand simultaneously satisfies the optimality criteria, is a challenging issue. In practical applications, in addition to the above problem, the computational load of the control input should also be considered and provide a rational interaction between the controller's desirable performance and the calculations volume. In the present paper, a robust optimal stable fuzzy controller based on the parallel distributed compensation is designed, using Takagi-Sugeno fuzzy model of electric vehicle. The stabilizer feedback gains of fuzzy model, the upper bound of the uncertainties, the upper bound of the disturbances effect, and the upper bound of the cost function are obtained completely offline, through the solving of a minimization problem based on the linear matrix inequality. Therefore, the calculation volume of the control input is extremely low. This allows the practical implementation of the proposed controller. The favorable performance of the proposed controller is demonstrated in five-step simulations. Manuscript profile -
Open Access Article
104 - Harmonic Voltage Reduction by using Droop Controller in Inverters Parallel Operation
B. Fani M. Moazzami E. FarhoodiMicrogrid technology makes possible coordination and effective use of different energy resources for supplying loads. In order to have synchronous operation between inverter resources during the occurrence of islanding condition, the use of droop controller structure wo MoreMicrogrid technology makes possible coordination and effective use of different energy resources for supplying loads. In order to have synchronous operation between inverter resources during the occurrence of islanding condition, the use of droop controller structure would be beneficial. In this paper, the conventional droop controller is modified to divide proportional power between resources and cause accurate voltage setting in output resources. By providing a model for connected inverter to the nonlinear load, a harmonic droop controller has been designed. By droop controller related to each harmonic, the harmonic voltages are calculated and add to the reference voltage. Therefore the quality of the output voltage is improved. Then the inverter voltage control loop would be modified with resistance impedance in the presence of non-linear loads, so that, in combination with harmonic droop controller, THD of output voltage considerably reduced. Simulation results show the ability of suggested method in reduction of harmonic voltages in inverters parallel operation. Manuscript profile -
Open Access Article
105 - Improved Semi-Quantum Direct Communication Protocol
Z. rashidi M. hooshmandUnlike classical cryptography, where security is based on computational complexity, quantum cryptography has unconditional security, which is based on physical constraints. So far, the semi-quantum version of many of the problems of secure quantum communication protocol MoreUnlike classical cryptography, where security is based on computational complexity, quantum cryptography has unconditional security, which is based on physical constraints. So far, the semi-quantum version of many of the problems of secure quantum communication protocols has been proposed. In this study, we examined semi-quantum protocols that allow users to access a secret message directly without distributing the key. An important factor used to analyze the performance of secure quantum direct communication protocols is efficiency. In this study, the proposed semi-quantum secure communication protocol against various quantum attacks has been investigated. In the proposed scheme for decoding the confidential message by the receiver, a sequence of single photons is required, which is first generated by the controller. The proposed protocol has a yield of 50%, which is higher than the previous protocol, which has a yield of 66.6%. Manuscript profile -
Open Access Article
106 - Distributed Control Scheme Based on Model Predictive Control for Supplying Power in an Isolated DC Microgrid
Arash Abedi Behrooz Rezaie Alireza Khosravi مجید شهابیIn this paper, a control scheme is presented for an isolated DC microgrid including wind turbine connected to permanent magnet synchronous generator, electrical energy storage unit, and variable electrical loads. Energy sources are connected to a common bus through DC b MoreIn this paper, a control scheme is presented for an isolated DC microgrid including wind turbine connected to permanent magnet synchronous generator, electrical energy storage unit, and variable electrical loads. Energy sources are connected to a common bus through DC buck and buck-boost converters. The local distributed controllers are located in the first control layer. These controllers are designed based on a Lyapunov stability analysis and thereby its stability is guaranteed. Moreover, the current and voltage, injected to the network, are adjusted by controlling the switching functions of the converters. The decentralized secondary controllers determine the contribution of the local units for supplying the local loads. In this control layer, a model predictive controller for the wind generation unit as well as a proportional-integral controller for preserving the bus voltage are proposed to determine the reference currents for the local controllers. In addition to the practical simplicity, complete isolation of the secondary controllers, minimum requirements to data transfer, and providing a control structure without any need to change in development plan are the important advantages of the proposed control scheme. The performance of the controllers is investigated and verified using the simulations in MATLAB software performed for different cases. Manuscript profile -
Open Access Article
107 - Controller Design and Asymptotic Stability Analysis of a Buck Converter with a Cascade Control Structure Using Singular Perturbation Theory
Sajad Azarastemal Mohammad HejriThis paper presents the theoretical proof for the closed-loop asymptotic stability of a DC-DC buck converter based on singular perturbation theory. Due to the two-time scales structure of this converter with fast and slow dynamics, a cascade control structure is used to MoreThis paper presents the theoretical proof for the closed-loop asymptotic stability of a DC-DC buck converter based on singular perturbation theory. Due to the two-time scales structure of this converter with fast and slow dynamics, a cascade control structure is used to control it. This controller has two control loops: an outer loop to control the output voltage based on the proportional-integral control and an inner loop to control the inductor current based on the sliding mode control. The controllers in the loops are designed based on perturbation theory to meet the constraints of the converter and ensure the asymptotic stability of the closed-loop system over a wide range of initial conditions. For validation, the proposed control design method is simulated for a typical buck converter in the MATLAB-SIMULINK environment. The simulation results show that by properly selecting the PI controller coefficients in the outer loop, the problem requirements are met, and the asymptotic stability of the closed-loop system is guaranteed in a wide range of the converter initial conditions. Furthermore, the system robustness against load uncertainty and input disturbances as well as the voltage reference tracking are evaluated, and the proposed structure is compared with a PI-PI structure. Manuscript profile -
Open Access Article
108 - Adaptive Non-singular Terminal Sliding Mode Control Based On Disturbance Observer for the Microelectromechanical Vibratory Gyroscope Contro
M. R. SoltanpourIn this paper, an adaptive non-singular terminal sliding mode control based on disturbance observer is proposed for detection process and control of the micro-electromechanical vibratory gyroscope stimulation process. For this purpose, the dynamical equations of the vib MoreIn this paper, an adaptive non-singular terminal sliding mode control based on disturbance observer is proposed for detection process and control of the micro-electromechanical vibratory gyroscope stimulation process. For this purpose, the dynamical equations of the vibrational gyroscope system are initially expressed. In the following, the dynamical equations of this system are transmitted to the domain of state-space equations and then to the domain of tracking error. After that, the dynamic structure of the finite time disturbance observer is presented. Then, the design of the adaptive non-singular terminal sliding mode control based on finite time disturbance observer is expressed. The proposed strategy carries out the control of the stimulation process in the presence of structured and un-structured uncertainties existing in the dynamic equations of the microelectromechanical vibrational gyroscope system, and performs the detection process through only an adaptive law. The mathematical proof shows that the closed-loop system with the proposed control, and in the presence of the existing uncertainties, has the finite time global asymptotic stability. The presence of a disturbance observer in the proposed control structure will weaken the role of un-structured uncertainties in the gyroscope control process and reduce the control input amplitude. In order to evaluate the proposed control performance, simulations in 3 steps are implemented on the electromechanical vibrational gyroscope system. Simulation results confirm the desired performance of the proposed control. Manuscript profile -
Open Access Article
109 - A Reduced Data Transfer Scheme in Distributed Secondary Control of Microgrid Using Aperiodic Sampling Method
Mohyedin Ganjian-Abukheili مجید شهابی Qobad ShafieeThe steady state error in voltage amplitude and frequency and improper reactive power sharing are main disadvantages of droop control in primary level of control of distributed resources (DERs) in microgrid. Secondary control can compensate these problems. In contrary t MoreThe steady state error in voltage amplitude and frequency and improper reactive power sharing are main disadvantages of droop control in primary level of control of distributed resources (DERs) in microgrid. Secondary control can compensate these problems. In contrary to centralize control, distributed secondary control may bring merits such as reliability, flexibility and scalability improvement. The distributed secondary control is usually implemented using consensus algorithm whose communication network is very important. Communication network is usually modeled continuously with a constant transfer rate. In this paper, the consensus algorithm with communication network are implemented in discrete domain because of discrete nature of them. Two aperiodic data transfer strategies state dependent and state independent are also proposed for releasing communication network burden where data rate is not fixed. Time delay as a non-desirable effect is evaluated. The proposed method applied on an islanded microgrid, and simulation results show the effectiveness of the proposed method. Manuscript profile -
Open Access Article
110 - Robust Optimal Control of Lateral Vehicle’s Dynamics with Adaptive Dynamic Programming Approach
Mohammad Reza Satouri Abolhassan Razminia Arash MarashianLateral vehicle’s control with constant longitudinal velocity using adaptive dynamic programming, backstepping and zero-sum games theory is investigated in this paper. The nonlinear dynamics is considered and the steering torque is chosen to be the control input instead MoreLateral vehicle’s control with constant longitudinal velocity using adaptive dynamic programming, backstepping and zero-sum games theory is investigated in this paper. The nonlinear dynamics is considered and the steering torque is chosen to be the control input instead of the steering angle. At first, a subsystem is created by augmenting the lateral vehicle’s dynamics with lane keeping ones considering the steering angle as the control input and the road curvature as a disturbance. Utilizing adaptive dynamic programming, neural networks and zero-sum games theory, the optimal control law is obtained and then, the results exerted on the second subsystem which is the dynamics of the steering angle and a control law is captured for which using the backstepping control method. Finally, performance of the proposed algorithm is demonstrated by applying it on a typical vehicle model. Manuscript profile -
Open Access Article
111 - H∞ Robust Stability Augmentation System Design by Genetic Optimal Coefficient for HUAV MIMO Model with Coupled Dynamics
zahra salamati zahra nejati alireza farajiNowadays, Unmanned helicopters are used widely in many applications because they have high maneuverability and can take off and landing in many areas, and its stability has special importance. Without stability augmentation system (SAS), the helicopter is not maneuverab MoreNowadays, Unmanned helicopters are used widely in many applications because they have high maneuverability and can take off and landing in many areas, and its stability has special importance. Without stability augmentation system (SAS), the helicopter is not maneuverable. Stability augmentation system or SAS design for helicopter decreases disturbances effects and improve performance. In this paper a robust SAS is designed for nonlinear dynamic model of ANCL helicopter in hover mode, this model is unstable, multivariable, under-actuated with coupling between dynamics Due to specific characteristics for liner model of the system in this paper, some filters are designed for input signals of actuators for decoupling of system dynamics in closed loop system, so these loops will become decoupled. PI controller is conventional to design of SAS in small helicopters, so PI coefficients are designed robustly for each decoupled control loop and this is designed by H_∞ Robust problem and optimized by genetic algorithm. Finally, obtained controllers are simulated for nonlinear model helicopter in hover mode that results show robustness against of nonlinear model uncertainty and disturbances. Manuscript profile -
Open Access Article
112 - Sliding Mode Control Applied in Two-wheeled Self-Balancing Robot System in Presence of Structured and Un- Structured Uncertainties in Dynamical Equations and Without the Need for Kinematic Equations
M. R. Soltanpour R. GholamiIn this paper, we proposed solutions for controlling the two-wheel self-balancing robot system in the presence of uncertainties in dynamical equation and without the need for kinematic equations. For this purpose, the dynamical equations of this system are initially tra MoreIn this paper, we proposed solutions for controlling the two-wheel self-balancing robot system in the presence of uncertainties in dynamical equation and without the need for kinematic equations. For this purpose, the dynamical equations of this system are initially transmitted to the domain of error, then these equations are divided into two independent subsystems, one of which is an under-actuated system and the other is fully actuated system. In order to control the under-actuated subsystem, two completely different sliding mode controllers are proposed that are able to provide this subsystem in the presence of structured and un-structured uncertainties with global asymptotic stability. Subsequently, in order to control the fully under-actuated subsystem, a sliding mode control is proposed to provide this subsystem in the presence of existing uncertainties with global asymptotic stability. Since these two subsystems are completely independent of each other, their global asymptotic stability proofs prove the global asymptotic stability of the closed-loop system. The separation of two-wheeled self-balancing robot sub-systems eliminates the need to use the kinematic equations, and this causes the presence of structured uncertainties to have no effect on the accuracy of tracing the closed-loop system state variables. Finally, to evaluate the performance of the proposed controllers and compare their performance results, three-stage simulations are implemented on the two-wheeled self-balancing robot system. Mathematical proofs and simulation results show the desired performance of the proposed solutions. Manuscript profile -
Open Access Article
113 - Model Predictive Control of Permanent Magnet Synchronous Machine Based on Finite and Continuous Control Sets in Two Functional Quarters
ehsan ghasemi madani Mohammad Reza Alizadeh Pahlavani Arash Dehestani KolagarIn this paper, two schemes of model predictive control (MPC) method, named finite control set model predictive control (FCS-MPC) and dead-beat model predictive control (DB-MPC) as a continuous control set model predictive control (CCS-MPC) are applied and compared to co MoreIn this paper, two schemes of model predictive control (MPC) method, named finite control set model predictive control (FCS-MPC) and dead-beat model predictive control (DB-MPC) as a continuous control set model predictive control (CCS-MPC) are applied and compared to control the current of a permanent magnet synchronous machine in energy recovery mode for the use of electric vehicles. The FCS-MPC strategy selects the optimal voltage vector and applies the control pulses directly to the inverter without using any modulators. In other side, DB-MPC is implemented through space vector pulse width modulation (SVPWM). The performance and results of both types of control strategies are extracted and compared using MATLAB Simulink software. The comparisons are made mainly in steady state and transient modes. Both control strategies are applied to a permanent magnet synchronous machine with the same parameters and with the same operating mode. The results show that the current steady state fluctuation is further reduced in the DB-MPC strategy and the transient state response is faster in the FCS-MPC strategy. Manuscript profile -
Open Access Article
114 - Design and Implementation of Fuzzy Sliding Mode Controller for Motion Control of an Electric Shake Table Using Adaptive Extended Kalman Filter
Nima rajabi Ramazan HavangiIn this paper, Design of a fuzzy sliding mode controller (FSMC) with adaptive extended Kalman filter (AEKF) for controlling a shake table system with electric actuator and ball-screw mechanism. Due to the uncertainties regarding the model parameters and the noise of the MoreIn this paper, Design of a fuzzy sliding mode controller (FSMC) with adaptive extended Kalman filter (AEKF) for controlling a shake table system with electric actuator and ball-screw mechanism. Due to the uncertainties regarding the model parameters and the noise of the data of the two encoder and accelerometer sensors, there are many problems in controlling this system. Therefore, it is crucial to employ a non-precise model-based controller and a nonlinear adaptive filter. The fuzzy sliding mode control and Extended Kalman filter are a good way to control this system. In sliding mode control, chattering at the control input is inevitable. In this paper, a simple fuzzy inference mechanism is used to reduce the undesirable phenomenon of chattering by correctly estimating the upper bound of uncertainty. In the following, a recursive method is used to determine the system and measurement noise covariance matrices. The data of the two encoder and accelerometer sensors are combined in the adaptive extended Kalman filter and the results in noise elimination and parameter estimation are investigated. Linear speed feedback available through the Kalman filter is used to stabilize and control the closed loop system. The end is examined to check the performance of the control structure provided by the seismic table test. The results show that the proposed method is very effective. Manuscript profile -
Open Access Article
115 - testDesign Decentralized Controller for a Group of Cooperative Robot to Pushing a Box in Presence of Network Constraints
میلاد مرادی سید محمد مهدی Seyyed M. Mehdi DehghanThe problem of pushing objects by a group of cooperative robots has many applications on land and sea level and due to its importance, it has become a standard problem for evaluating various theories of robot cooperation. In this case, each robot produces distributed co MoreThe problem of pushing objects by a group of cooperative robots has many applications on land and sea level and due to its importance, it has become a standard problem for evaluating various theories of robot cooperation. In this case, each robot produces distributed control force to push the object in the desired direction. The proposed methods for distributed control of an object on a time-varying path require information about the position of the robots relative to the object. The problem of the lack of sufficient knowledge of each robot of how the robots are positioned relative to the body can be solved by proposing a consensus issue on positional moments. In this case, the robots must reach a consensus on these moments by exchanging information through the communication network between them. The effect of communication network between robots on the process of reaching consensus and the effect of delay in consensus on the results of control of object on the desired path is the subject of this article. In this paper, the appropriate control law for achieving consensus in the absence of full connection between all bots, delay and the probability of data loss in the communication network is presented. The maximum allowable network delay is also specified to prevent the instability of object motion control. The simulation results show the capability of the proposed method for controlling the velocity of the object on the desired variable path and show the effect of network constraints on the performance of the controller. Manuscript profile -
Open Access Article
116 - Optimal Robust Controller Design for the Electrical Vehicle Charging Process in the Presence of Uncertainty
mahsa karami roohollah barzamini reza sharifiWireless power transmission technology with titles such as contactless power transmission, magnetic coupling power transfer, etc.are known and in fact, this method safely and reliably transmits power in such a way that does not require a mechanical connection between th MoreWireless power transmission technology with titles such as contactless power transmission, magnetic coupling power transfer, etc.are known and in fact, this method safely and reliably transmits power in such a way that does not require a mechanical connection between the source and the load. In this method, power transmission is done wirelessly using resonance induction coupling. By operating the transducer in the resonant mode, it will be possible to transfer a significant amount of power over an air distance of a few tens of centimeters, while the system efficiency is high and the voltage and current stress of the transducer are reasonable. In this paper, by presenting a method based on robust control and meta-heuristic algorithms, we improve the charging process of electric vehicles by considering uncertainty conditions. The simulation results show the better performance of the proposed controller compared to other controllers. Also, in this paper, the effect of connecting the charging station of electric vehicles to the distribution network is investigated by considering the optimal charging and discharging scheduling systems to maximize the economic profit of the vehicles and the charging station. In the proposed method, the best program for charging and discharging cars in order to maximize their profit is extracted based on genetic algorithm. According to the simulation results, optimal charging and discharging planning has reduced the value of losses to the total network energy to load the station in some trains, so that network targets such as losses and voltage deviation index are minimized and voltage stability index is maximized. In this study, minimization of losses, voltage deviation as well as maximization of voltage stability index have been investigated and the optimal location of the station has been obtained by considering these goals along with the profit of the station and vehicles. Finally, according to the results, with the planning of charging and discharging cars, in addition to providing the required charge, the profit of the station and cars has also increased. Manuscript profile -
Open Access Article
117 - Hierarchical Control for Accurate Power Sharing and Circulation Current Reduction in Resistive AC Microgrids Using Adaptive Virtual Impedance and Distributed Communication Links
Masoud Esmaili Mohammad HejriThis paper presents an efficient method based on the adaptive virtual impedance and distributed communication link with a hierarchical control system in the resistive AC islanding micrigrids for accurate power sharing and circulating current reduction. In existing metho MoreThis paper presents an efficient method based on the adaptive virtual impedance and distributed communication link with a hierarchical control system in the resistive AC islanding micrigrids for accurate power sharing and circulating current reduction. In existing methods, the adaptive virtual resistance can take negative values and violate the assumption of feeders’ resistive dominance based on which the droop controller is designed, and as a result, deteriorate its performance. Besides, the negative virtual resistance, with a reduction in the system overall damping, can reduce the stability margin and lead to side effects on the closed-loop system performance, especially during transients. In the proposed method, the problems associated with the negative virtual resistance are removed via the intelligent implementation of a new distributed communication link among microgrid inverters. The advantages of the proposed method include: circulating current elimination, accurate power sharing among distributed generators proportional to their rated capacities, prevention of voltage and frequency deviations from their reference values in point of power coupling (PCC) bus, guarantee of the resistive or inductive dominance of the feeder impedance in various operating points, decoupling between active and reactive powers, and as a result, guarantee of a desirable performance for droop controller in different operating points, performance and stability improvement, and finally using a simple, one-sided and a low bandwidth communication link instead of the complex, two-sided, and centralized communication system. Simulation results in MATLAB/SIMULINK environment demonstrate that the proposed control strategy has obviated effectively the shortcomings of the conventional droop and adaptive virtual impedance controllers. Manuscript profile -
Open Access Article
118 - Detection and Mitigation of a Combined Cyber Attack on Automatic Generation Control
Tina Hajiabdollah H. Seifi Hamed DelkhoshRecent advances in power system monitoring and control require communication infrastructure to send and receive measurement data and control commands. These cyber-physical interactions, despite increasing efficiency and reliability, have exposed power systems to cyber a MoreRecent advances in power system monitoring and control require communication infrastructure to send and receive measurement data and control commands. These cyber-physical interactions, despite increasing efficiency and reliability, have exposed power systems to cyber attacks. The Automatic Generation Control (AGC) is one of the most important control systems in the power system, which requires communication infrastructure and has been highly regarded by cyber attackers. Since a successful attack on the AGC, not only has a direct impact on the system frequency, but can also affect the stability and economic performance of the power system. Therefore, understanding the impact of cyber attacks on AGC and developing strategies to defend against them have necessity and research importance. In most of the research in the field of attack-defense of AGC, the limitations of AGC in modeling such as governor dead band and communication network transmission delay have been ignored. On the other hand, considering two cyber attacks on the AGC and proposing a way to defend against them simultaneously, have not been considered. In this paper, while using the improved AGC model including governor dead band and communication network transmission delay, the effect of two attacks - data injection attack (FDI) and delay attack which are the most important cyber attacks on AGC - has been investigated. Also, the simultaneous effect of these two attacks is discussed as a combined cyber attack. The Kalman filter-based three-step defense method has been proposed to detect, estimate and mitigate the impact of the attacks and its effectiveness has been tested on the two-area AGC system. Manuscript profile -
Open Access Article
119 - Robust Finite-Time Chattering Free Sliding Mode Adaptive Impedance controller in Remote Control System in Presence of Random Delay
Abolfazl Kamali Ardakani Hadi SafdarkhaniRemote control of robots is one of the most relevant and practical fields in robotics. Most of the control structures of remote operation systems seek to achieve transparency and stability at the same time, which the simultaneous achievement of the both, considering the MoreRemote control of robots is one of the most relevant and practical fields in robotics. Most of the control structures of remote operation systems seek to achieve transparency and stability at the same time, which the simultaneous achievement of the both, considering the uncertainty and disturbances in the system and random delay in the communication channel is very challenging. So far, many researchers have used position, speed, force or impedance information to provide various control methods, but none of these methods have achieved complete transparency and robust stability in the presence of random delay and uncertainties and disturbances and compromises between them should be made. In this paper, using a new method, a control structure including sliding mode control, adaptive control and impedance control is presented. This method has been simulated by Simulink of MATLAB software and it has been shown that this method is able to establish ideal transparency and ensure robust stability in the system with disturbances and uncertainties in the presence of random delay in the network. Manuscript profile -
Open Access Article
120 - An Intelligent Overload Controller Using in Next Generation Networks
مهدی خزائیSIP is considered as a signaling protocol for IP multimedia subsystem (IMS) and IMS is introduced as the next generation networking platform. Unlike positive features such as text-based, IP-based, data-independent, support mobility and end-to-end, SIP lacks a proper ove MoreSIP is considered as a signaling protocol for IP multimedia subsystem (IMS) and IMS is introduced as the next generation networking platform. Unlike positive features such as text-based, IP-based, data-independent, support mobility and end-to-end, SIP lacks a proper overload control mechanism. Hence, this challenge will cause the widespread users of next generation networks to loss quality of service. IMS is a complex network consisting of subsystems, interacting with each other. As a result, multi-agent systems can be a useful tool to solve the IMS overload. Therefore, each IMS server is considered as an intelligent agent with learning and negotiation ability with other agents while maintaining autonomy therefore, the overload is eliminated by communication and knowledge transferred between agents. In this paper, multi-agent system and their properties presents a hop-by-hop elimination-based method which simulation results show performance improvement compared to known methods. Manuscript profile -
Open Access Article
121 - Damping Controller Design Based on Identified Model Using Wide-Area Phasor Measurements Data
Azin Atarodi Hemin GOLPIRA Hassan BevraniContinuous changes besides increasing complexities of modern power systems cause emergence of new challenges in modeling of power systems. Nowadays, with development of wide-area monitoring systems, data from the overall system can be used to identify and estimate model MoreContinuous changes besides increasing complexities of modern power systems cause emergence of new challenges in modeling of power systems. Nowadays, with development of wide-area monitoring systems, data from the overall system can be used to identify and estimate model for power systems. This paper focuses on power system stabilizer tuning using the derived measurements-based model. The derived low-order model includes dynamic characteristics of inter-area dominant modes and can be used to design the damping controller and evaluate its effectiveness in power system studies. The controller can be reinterpreted as power system stabilizer and may be designed in two different methods of i) robust and ii) Ziegler-Nichols. The numerical results show the effectiveness of this approach in improving the small signal stability behavior of two-area 4-machine system using measured data, obtained from time domain simulation in MATLAB software. Manuscript profile -
Open Access Article
122 - Studying the Quality of Curriculum in Industrial Management Discipline to Identify Job Needs according to Market
طلعت دیبا نادر برزگر سعید مرادیThe purpose of the current research was study of the status of curriculum in industrial engineering discipline and its efficiency as an important factor influencing the quality of the outputs of the higher education system. The research was descriptive-survey method whi MoreThe purpose of the current research was study of the status of curriculum in industrial engineering discipline and its efficiency as an important factor influencing the quality of the outputs of the higher education system. The research was descriptive-survey method which is a purpose operational. To gather information needed library Data, Experts’ opinion and questionnaires were used. The population of the research has consisted of experts in the field of Industrial Engineering from Universities of Tehran, Sharif, Amir Kabir, Science and Technology, and also Industrial Engineering institute of Iran using Available sampling method. At the end 135 questionnaires were gathered. The research data analysis using descriptive statistics and inferential statistics has shown that the curriculum of Industrial Engineering needs to be redesigned and presented regarding educational content, features, orientation and pedagogy based on the world’s changes and also markets and students’ needs in the credits of management of information systems management, planning and control project, feasibility and project planning. Manuscript profile -
Open Access Article
123 - Fault Tolerant Control of DFIG Wind Turbine Back-to-Back Converter Based on Developed Sliding Mode Method
mehrnoosh Kamarzarrin Mohammad Hossein Refan پرویز امیریFault detection and tolerable control of wind turbine increases its reliability and availability. One of the electrical components of the wind turbine with a high error rate is the power converter. In this paper, a new method for fault tolerant (FT) control of the wind MoreFault detection and tolerable control of wind turbine increases its reliability and availability. One of the electrical components of the wind turbine with a high error rate is the power converter. In this paper, a new method for fault tolerant (FT) control of the wind turbine back-to-back converter based on Dual Feed Induction Generator (DFIG) is presented. When a open circuit fault occurs in each of the IGBTs of the wind turbine converter, the performance of the converter is distorted and part of the current signal of each leg of the converter is lost. The classical controller cannot completely correct this change in current behavior, and for this reason, it has an abnormal performance. As a result, power generation will be accompanied by many fluctuations. In order to compensate, a new method based on sliding mode control is presented in this article. First, when an error occurs, the fault detection system identifies the faulty leg, and after reconfiguring the hardware, the proposed control system based on sliding mode control replaces the classic control system and switching operation. The fault detection method presented in this article is based on artificial neural network and it was developed based on matching with the functional parameters of the wind turbine. The proposed FT method is evaluated using a hardware simulator in a laboratory loop with a 90 kW DFIG generator. The experimental results show the proper accuracy of the fault detection method and on the other hand, the proposed FT method was able to compensate the open circuit fault of the IGBT. Manuscript profile -
Open Access Article
124 - Neural-Fuzzy Network and Z-Source Converter Adaptive Controller for Control the Power of the Hybrid Network Consisting of Doubly-Fed Induction Generator and Solar Cel
ali akbar habibi borzou yousefi abdolreza noori shirazi Mohammad rezvaniRenewable energies outfitted with low latency assets as wind turbines and photovoltaic exhibits give significant adverse consequences through power framework dynamic protections. For this issue, in view of fostering a high voltage direct current (HVDC) interface, a vers MoreRenewable energies outfitted with low latency assets as wind turbines and photovoltaic exhibits give significant adverse consequences through power framework dynamic protections. For this issue, in view of fostering a high voltage direct current (HVDC) interface, a versatile Neuro-Fuzzy-based damping regulator is introduced in this paper for working on unique execution of low inertia resources associated with power frameworks. The created power framework comprises of various age sources including seaward and inland wind turbines (WTs), photovoltaic exhibits (PVs) and limited doubly fed induction generators (DFIGs) which are incorporated together through an interconnected framework. For this situation, thinking about various functional and innovative conditions, damping execution of proposed ANFIS plot is assessed. The proposed plot is a non-model-based regulator which utilizes the benefits of both neural and fluffy rationales together for giving a quick and secure design of damping regulator through continuous recreations. To research ANFIS plot through genuine cases, considering a commonplace microgrid comprises of various low-latency assets (for example WT, PV, DFIG), the framework damping exhibitions through hamper occasions are assessed. Recreation results demonstrate viability and effectiveness of the proposed plot for damping dynamic motions of low inertia resources with high damping proportions with respect to extreme issue occasions. Manuscript profile -
Open Access Article
125 - Performance Enhancement of Unfalsified Adaptive Control Using the Model Reference
Mojtaba Nouri ManzarUnfalsified adaptive control is a new approach in supervisory control that ensures the selection of a stabilizing controller from a control set based on the system input-output data. A prerequisite for ensuring stability is the existence of a pre-designed controller set MoreUnfalsified adaptive control is a new approach in supervisory control that ensures the selection of a stabilizing controller from a control set based on the system input-output data. A prerequisite for ensuring stability is the existence of a pre-designed controller set that contains a stabilizing controller. The supervisor selects the controller based on the cost function calculated with the system input-output data. In this method, the control system performance is restricted to the controllers of the control set. In this paper, the controller set update is performed by introducing the concept of performance falsification along with the stability falsification of the active controller. To falsify the performance of the controller set, the structure of the model reference is proposed to evaluate the performance of the control system. In case of performance falsification, a new controller is designed and added to the controller set based on system data and without using any model. To design the controller, a linear matrix inequality problem is solved. In this paper, no system model is used, and the presented method is completely model-free and data-oriented. The simulation results show the performance improvement of the proposed method compared to other methods in a standard robust adaptive benchmark system. Manuscript profile -
Open Access Article
126 - Developing an Alignment Model of Management Control Systems and Strategy based on Dynamic Capability Approach (Case study: Iranian Medicine Cooperates Listed on the Stock Exchange)
Khadijeh Moghaddar mirzahasan hoseini Mohammad Taghi Amini Mohammad Mahmoudi MaymandObjective: The research is to broaden the knowledge about the relationship between management control systems and the organization’s strategies in order to design more effective control systems. Since in the current study, the strategy conceptualization is formed in the MoreObjective: The research is to broaden the knowledge about the relationship between management control systems and the organization’s strategies in order to design more effective control systems. Since in the current study, the strategy conceptualization is formed in the organizational capabilities’ level –not in the level of strategic choices- the main purpose of the research is to identify suitable control systems for dynamic capabilities development. Methodology: Regarding to the main purpose of the study, positivist paradigm, in general, and the contingent approach, in particular, are used and the cross-sectional survey research strategy is developed to examine the relationship between strategy and control system. Findings: The results showed that in dynamic environments, the relational control systems have a positive relationship with organizational dynamic capabilities, organizational capabilities and organizational performance. Moreover, the dynamic tension resulting from simultaneously and equally diagnostic and interactive usage of control systems in dynamic environments has a significant positive relationship with organizational dynamic capabilities, organizational capabilities and organizational performance. Additionally, control system via dynamic capabilities has an effect on formation and development of organizational capabilities and the system could modify the organizational performance through the processes of dynamic capabilities and organizational capabilities development Manuscript profile -
Open Access Article
127 - Relationship between Spiritual Intelligence and Internal Locus of Control with Students’ Mental Health
mahnaz Mehrabizadeh HonarmandAbstract: The purpose of the present study was to determine the relationship between spiritual in-telligence and locus of control with students' men-tal health. To do so, 400 male and female under-graduate students at Shahid Chamran University of Ahwaz were selected a MoreAbstract: The purpose of the present study was to determine the relationship between spiritual in-telligence and locus of control with students' men-tal health. To do so, 400 male and female under-graduate students at Shahid Chamran University of Ahwaz were selected as subjects through ran-dom multistage sampling. The subjects completed the King's Spiritual Intelligence Self-Report In-ventory (SISRI-24) the Nowicki-Strickland's Lo-cus of Control Questionnaire (LOCQ), and Ge-neral Health Questionnaire (GHQ-28). By apply-ing simple correlation, the findings showed that there was a significant and positive correlation between spiritual intelligence and its three dimen-sions (personal meaning production, transcend-dental consciousness, and consciousness state ex-pansion) with mental health. However, there was no significant correlation between critical thinking (one dimension of spiritual intelligence), and men-tal health. In addition, there existed asignificant relation between locus of control and mental hea-lth. The results from regression analysis indicated that locus of control and spiritual intelligence, res-pecttively, play a role in predicating the mental health. Besides, the regression analysis of spiritual intelligence dimensions (critical thinking, personal meaning production, transcendental consciousness, and consciousness state expansion) indicated that only the personal meaning production can pre-dicate 0.05 of mental health. Manuscript profile -
Open Access Article
128 - Investigation of Demand-Resources-Support Job Design Model in the Industrial, Financial, Healthcare, and Public Workplaces
Hamidreza OreyziTo investigate the effects of job demands on employees in job design, several models have been developed. One of these models is demand-resource-support model. It seems that this model varies in different organizational workplaces because of special features of these se MoreTo investigate the effects of job demands on employees in job design, several models have been developed. One of these models is demand-resource-support model. It seems that this model varies in different organizational workplaces because of special features of these settings. This study was conduc-ted to investigate the demand-resources-support job design model in the industrial, financial, healthcare, and public workplaces. The re-search samples were selected from four sec-tors, namely industry (n=928), healthcare (n=526), financial department (n=483), and public organizations (n=582). The samples res-ponded to research instruments consisting of Time, Physical Effort, Autonomy, Skill Utili-zation, Social Support, Occupational Safety, Task Satisfaction, Organizational Commitment, and Fatigue Questionnaires. Evaluation of measurement equivalence in four selections were tested via factor invariance technique. The re-sults showed that the six-factor model has a better fit than other models both in terms of the chi square indexes (respectively, in industry=1.85, in hospitals=1.67, in business =1.71, in governmental organizations =1.92) and in terms of absolute and detailed indexes (in all four groups, these values only reach to optimal levels=0.90 in the fifth model), as well as in terms of residual indexes (the amounts in all four groups in the fifth model were less than 0.04). The results showed that, in all four sections, skill utilization predicts task satis-faction and organizational commitment. The required time factor predicts the fatigue, and social support predicts all three variables of task satisfaction, organizational commitment, and fatigue. Manuscript profile -
Open Access Article
129 - Investigation of Demand-Resources-Support Job Design Model in the Industrial, Financial, Healthcare, and Public Workplaces
Hamidreza Oreyzi hajar baratiTo investigate the effects of job demands on employees in job design, several models have been developed. One of these models is demand-resource-support model. It seems that this model varies in different orga-nizational workplaces because of special fea-tures of these MoreTo investigate the effects of job demands on employees in job design, several models have been developed. One of these models is demand-resource-support model. It seems that this model varies in different orga-nizational workplaces because of special fea-tures of these settings. This study was conduc-ted to investigate the demand-resources-sup-port job design model in the industrial, finan-cial, healthcare, and public workplaces. The re-search samples were selected from four sec-tors, namely industry (n=928), healthcare (n=526), financial department (n=483), and public organizations (n=582). The samples res-ponded to research instruments consisting of Time, Physical Effort, Autonomy, Skill Utili-zation, Social Support, Occupational Safety, Task Satisfaction, Organizational Commitment,and Fatigue Questionnaires. Evaluation of mea-surement equivalence in four selections were tested via factor invariance technique. The re-sults showed that the six-factor model has a better fit than other models both in terms of the chi square indexes (respectively, in indus-try=1.85, in hospitals=1.67, in business =1.71, in governmental organizations =1.92) and in terms of absolute and detailed indexes (in all four groups, these values only reach to optimal levels=0.90 in the fifth model), as well as in terms of residual indexes (the amounts in all four groups in the fifth model were less than 0.04). The results showed that, in all four sections, skill utilization predicts task satis-faction and organizational commitment. The required time factor predicts the fatigue, and social support predicts all three variables of task satisfaction, organizational commitment, and fatigue. Manuscript profile -
Open Access Article
130 - Integrated Fault Estimation and Fault Tolerant Control Design for Linear Parameter Varying System with Actuator and Sensor Fault
Hooshang Jafari Amin Ramezani Mehdi ForouzanfarFault occurrence in real operating systems usually is inevitable and it may lead to performance degradation or failure and requires to be meddled quickly by making appropriate decisions, otherwise, it could cause major catastrophe. This gives rise to strong demands for MoreFault occurrence in real operating systems usually is inevitable and it may lead to performance degradation or failure and requires to be meddled quickly by making appropriate decisions, otherwise, it could cause major catastrophe. This gives rise to strong demands for enhanced fault tolerant control to compensate the destructive effects and increase system reliability and safety in the presence of faults. In this paper, an approach for estimation and control of simultaneous actuator and sensor faults is presented by using integrated design of a fault estimation and fault tolerant control for time-varying linear systems. In this method, an unknown input observer-based fault estimation approach with both state feedback control and sliding mode control was developed to assure the closed-loop system's robust stability via solving a linear matrix inequality formulation. The presented method has been applied to a linear parameter varying system and the simulation results show the effectiveness of this method for fault estimation and system stability. Manuscript profile -
Open Access Article
131 - Investigating of environmental impact assessment of mechanical and biological control in order to control the biomass of aquatic plants in Anzali Wetland (Case study: West Wetland)
طوبی عابدی shamim moghadamiThe purpose of environmental impact assessment is to identify, analyse and evaluate project activities. Environmental Impact Assessment ensures the environmental concept of sustainable development by providing the necessary environmental information to determine the env MoreThe purpose of environmental impact assessment is to identify, analyse and evaluate project activities. Environmental Impact Assessment ensures the environmental concept of sustainable development by providing the necessary environmental information to determine the environmental friendliness of a proposed project. Mechanical harvesting of aquatic plants along with biological and reed harvesting in the whole area of West Wetland and opening the entrance of Chafrud River were the main activities that could be implemented in this project. Mechanical harvesting operations are performed with a Harvester machine and reed harvesting is done with a motor saw or manually. The most important activities of the project are mechanical harvesting (reed harvesting and immersion of aquatic plants floating with the Harvester machine), restoration and cleaning of waterways (Chafrud River), dewatering and rehabilitation of West Wetland, biological control and operation of wooden bridge and bird watching station. Environmental parameters, consequences and nature of the effect, impact time, magnitude of the effect and the scope of the effect were investigated and the positive and negative effects of the design were determined. Manuscript profile -
Open Access Article
132 - Analysis and evaluation of organizational monitoring strategies in the Islamic culture and Islamic Research Institute
Mohammad Mahdi Parhizgar روحاله حسینی Mustafa Hossein AlikhaniControl and supervision is one of the most important tasks of managers of organizations. It is only by using control and supervision that organizations take steps to achieve their grand goals and identify their weaknesses and plan to address them. The purpose of this st MoreControl and supervision is one of the most important tasks of managers of organizations. It is only by using control and supervision that organizations take steps to achieve their grand goals and identify their weaknesses and plan to address them. The purpose of this study is to identify and select the optimal organizational supervision strategy in the Institute of Islamic Culture and Thought. The statistical sample of this research includes 25 managers, experts and thinkers working in the research institute. The required information was collected using two library and field methods, as a result of which nine organizational supervision strategies and eight indicators and criteria for evaluating the organizational supervision strategies of the research institute were identified. Data analysis was performed using TOPSIS software. Based on data analysis, organizational goals, the main strategies of the organization, employee acceptance, management policy, proximity (detection of deviations, savings (cost-effectiveness), ease of implementation, and flexibility, respectively, as the most important ranking indicators Organizational monitoring strategies of the Institute of Islamic Culture and Thought are also classified, as well as holistic monitoring strategies (control in sensitive and key points) and futuristic monitoring are introduced as the most optimal strategy among monitoring strategies and partial (decentralized) monitoring. Is the last priority. Manuscript profile -
Open Access Article
133 - Software Evaluation of Reducing the Number of Switching States and Removing the Weight Factor in the Predictive Current Control of Six-Phase Induction Motor
Peyman Mirzaeipour esmaeel rokrok Mohsen Saniei Syed Qudrat Allah seifosadatThe simple and accurate design of the flux weighting coefficient for the predictive current control (PCC) algorithm is an important issue that can be seen in all predictive controllers. It should be said that predictive current control is a promising method to obtain fa MoreThe simple and accurate design of the flux weighting coefficient for the predictive current control (PCC) algorithm is an important issue that can be seen in all predictive controllers. It should be said that predictive current control is a promising method to obtain fast torque response with a simple and flexible structure, but its development to multi-phase drives can lead to dissatisfaction. In this article, due to the challenge of computing load of PCC algorithm, the weighting coefficient removal method is used and finally modified predictive current control (VV-PCC) without weighting coefficient is used for six-phase induction motor drive. Different operating conditions such as startup, sudden loading and different speeds have been investigated. As a result, choosing a switching state in PCC leads to high x-y currents, this problem requires a small number of repetitions with the proposed VV-PCC method based on removing the weighting factor, because the number of switching states has increased from 49 to 13, and finally It will reduce copper losses and improve power quality. The results and validation of the mentioned cases are presented using MATLAB software. Manuscript profile -
Open Access Article
134 - Wisdom analysis to develop it in training staff and model presentation
Farhad Shafiepour Motlagh Abbas HgoltashThe purpose of this study was to analyze wisdom in order to develop it in educational staff (teachers) and to present a model. Mixed research method has been used for the study. The research environment consisted of all education teachers in Mahallat city (840 people) i MoreThe purpose of this study was to analyze wisdom in order to develop it in educational staff (teachers) and to present a model. Mixed research method has been used for the study. The research environment consisted of all education teachers in Mahallat city (840 people) in the quantitative section and 70 people in the qualitative section of all teachers in Mahallat city and articles and documents published during the last 20 years (2001-2021).The sampling method was continuous in the quantitative part with one-stage-random cluster method (237 people) and in the qualitative part in a targeted manner until the data saturation with 18 people. For data analysis, one-sample t-test was used in quantitative part and coding method was used in qualitative part. In general, the results showed that the average level of teachers' wisdom is moderate. Model of improving teachers' wisdom in the causal conditions section under the name of benevolence with 4 central codes, in the strategic conditions section under the name of balancing the learning space with 6 central codes, in the contextual section called teacher ranking with 3 central codes, in the intervention section called Individual life problems have 3 central codes and in the consequences section under the name of teaching efficiency, it has 3 central codes (power to influence students, class vitality, reduction of academic failure). Manuscript profile -
Open Access Article
135 - The effect of emotional regulation training on controlling the behavior of prisoners sentenced to retaliation in Yasuj prison
Hassan RezvanMoghadam Moslem mortezapour Dariush Babaei Seyed Hamid RazaviThis study was a clinical trial with pre-test and post-test interventions with a control group. The statistical population of this study consisted of all prisoners sentenced to retaliation in Yasouj prison. Study and obtaining informed consent, 25 people were selected b MoreThis study was a clinical trial with pre-test and post-test interventions with a control group. The statistical population of this study consisted of all prisoners sentenced to retaliation in Yasouj prison. Study and obtaining informed consent, 25 people were selected by convenience sampling method and participated in the project. The content of the training sessions, the emotional regulation training program based on the grass model at the prison level, was held during 4 one-hour sessions, then the collected data were analyzed using SPSS software and statistical tests. The results showed that the emotional regulation training program controlled the behavior of prisoners sentenced to retaliation in Yasouj prison, so emotion regulation and management with the necessary training, rational decision-making and control of impulsivity followed. Reassessment, problem-solving skills, effective and efficient communication, and anger management are positive and adaptive strategies that can be provided to individuals in the community through emotion regulation training, so it is suggested that these trainings be part of the skill. Living conditions, not only for prisoners but also for members of society, are commensurate with the desired age, gender and education and can play a high role in the reform and empowerment of individuals. Manuscript profile -
Open Access Article
136 - Finite-Control-Set Model Predictive Control of an Active Front-End Rectifier with Dynamic References and Comparison with MPDPC Method
Ayyoub Keshvari Mohammad Reza Alizadeh Pahlavani Arash Dehestani KolagarIn this paper, a finite-control-set model predictive control method is presented for closed loop control of an active front-end rectifier. The method used has a discrete-time function and does not require any additional modulators. The interesting point in the control a MoreIn this paper, a finite-control-set model predictive control method is presented for closed loop control of an active front-end rectifier. The method used has a discrete-time function and does not require any additional modulators. The interesting point in the control algorithm is how to control the dynamic references. The control strategy is able to provide proper references for source active power and DC voltage, without the need for additional control loops. In order to better understand the performance, the proposed control method is compared with the model predictive direct power control (MPDPC) method. The results obtained using Matlab/Simulink software show that the proposed method, while having all the capabilities of the MPDPC method, including proper tracking of active power and DC voltage and low current THD, by removing the PI controller and its related disadvantages, it has better stability and faster transient response. Manuscript profile -
Open Access Article
137 - Locus of Control in Quran’s View, with an Emphasis on Concept of Determinism & Free Will
maryamMan’s health in all areas is deeply affected by his lifestyle. On the other hand, lifestyle and actions and conducts originate from man’s mental and psychological processes and his style of thinking. The locus of control of man’s character is among personality traits MoreMan’s health in all areas is deeply affected by his lifestyle. On the other hand, lifestyle and actions and conducts originate from man’s mental and psychological processes and his style of thinking. The locus of control of man’s character is among personality traits that significantly affect the way one thinks and behaves. Research findings show that many of men’s problems and troubles are rooted in a belief in external control on individuals. But what affects does internal control have on individuals? Does external control not have any positive effects? A study of Quranic concepts, especially those related to the issue of determinism and free will point to the fact that Quranic discourse rules out absolute free will on the one hand and considers limited effects from external determinism on individuals, on the other. Hence, Quran’s view of the locus of control is something in the middle of internal and external control. Manuscript profile -
Open Access Article
138 - Multilateral Export Control Regimes: a Legal Mechanism or Tool of Political Pressure?
غلامحسین دهقانی فاطمه هاشمیMultilateral export control regimes are among major tools used by developed Western countries during the past six decades to maintain their technological supremacy under the pretext of preventing proliferation of weapons of mass destruction. These regimes have grown and MoreMultilateral export control regimes are among major tools used by developed Western countries during the past six decades to maintain their technological supremacy under the pretext of preventing proliferation of weapons of mass destruction. These regimes have grown and developed unprecedentedly in both quantitative and qualitative terms especially in the past decade following 9/11 terrorist attacks. Opponents and proponents have offered various viewpoints on the legality or illegality of these regimes on the basis of the international law. This research first presents a theoretical framework for the assessment of those viewpoints. Since both opponents and proponents have emphasized on the relationship between these regimes and international nonproliferation regimes, their implications for availability of equipment and material related to weapons of mass destruction, conventional weapons, missiles, and dual-use goods and material are briefly discussed. Finally, developments of these regimes in addition to viewpoints of proponents and opponents about legality and illegality of export control regimes are explained using a comparative study of commitments of states members of these regimes and their commitments under international nonproliferation treaties. The conclusion is that such export control regimes, which have been developed by their members to create monopoly on technical know-how and technology, are incompatible with commitments of member states under international law Manuscript profile -
Open Access Article
139 - Intervention by Invitation in Domestic Unrest from Viewpoint of International Law with Emphasis on Bahrain Case
فریده شایگانIntervention by invitation has been always associated with the political objectives which seek to meet the interests of the interventionist state. International community has frequently witnessed such intervention not only during the Cold War era, but even after its ter MoreIntervention by invitation has been always associated with the political objectives which seek to meet the interests of the interventionist state. International community has frequently witnessed such intervention not only during the Cold War era, but even after its termination. Although there is no specific rule on this kind of intervention in international law, certain criteria for the assessment of the legitimacy of this intervention can be found in international law. Intervention of Saudi Arabia and the United Arab Emirates in Bahrain was accompanied with passive reaction and silence of the Security Council. This paper first studies the criterion that can be used to assess legitimacy of intervention by invitation and then studies the legitimacy of intervention in Bahrain both on the basis of the aforesaid criteria and in accordance with the principle of responsibility to protect. Manuscript profile -
Open Access Article
140 - Design of a Secondary Controller Based on Distributed Cooperative Control of Distributed Generators (DGs) with Multi-Agent Systems Approach Considering DoS Cyber Attacks
Abdollah Mirzabeigi Ali Kazemy Mehdi Ramezani Seyed Mohammad AzimiToday, in many control methods, neighboring system information is used for better control and synchronization between different units, and therefore, in the access and transmission of information through communication links, problems such as disruption, uncertainty, noi MoreToday, in many control methods, neighboring system information is used for better control and synchronization between different units, and therefore, in the access and transmission of information through communication links, problems such as disruption, uncertainty, noise, delay, and cyber-attacks occur. In this paper, the effect of the Denial of Service (DoS) cyber-attack on the microgrid in island mode is investigated and a cooperative distributed hierarchical controller is designed with the presence of this cyber-attack. Distributed Generations (DGs) have been analyzed with the help of multi-agent systems and the communication network between them using graph theory. The effects of the DoS cyber-attack on the model of DGs are mathematically formulated and in proving the stability and synchronization of frequency and voltage, the suitable Lyapunov function is presented and the stability analysis of DGs against these cyber-attacks is performed and the stability and synchronization conditions of DGs are proved. To confirm the proposed theoretical issues, a case study model is simulated despite the DoS attack on the communicative links in Matlab Simulink, and the results show the performance of the designed controller in different conditions. Manuscript profile -
Open Access Article
141 - Improvement of Harmonic Losses and Power Quality Due to Matrix Converter Switching in Bidirectional Feeding Induction Generator Using Passive Hybrid Filter
neda ghaderi hoda naderi Mohammad عابدینی محمدحسن مرادی<p>In two-way feeding induction generators, the stator coils connect directly to the grid, while the rotor coils connect through power electronic converters. Back-to-Back (BTB) converters are commonly used but suffer from high losses, size, and weight due to their two-s More<p>In two-way feeding induction generators, the stator coils connect directly to the grid, while the rotor coils connect through power electronic converters. Back-to-Back (BTB) converters are commonly used but suffer from high losses, size, and weight due to their two-stage structure and DC link capacitor. This paper proposes replacing BTB converters with matrix converters for improved efficiency and compactness. The proposed method utilizes direct power control in the matrix converter for superior tracking of reference values during changes in both reference and turbine power. However, power electronic converters can introduce harmonics and power fluctuations. To address this, a passive hybrid filter is employed at the converter's input and output. This filter reduces active and reactive power fluctuations, improves Total Harmonic Distortion (THD), and enhances overall power quality. Additionally, the matrix converter's fast dynamic response to reference power changes eliminates the need for complex current control loops, resulting in a simpler structure with minimal calculations. The paper compares the performance of the proposed method (matrix converter with filter) against scenarios with and without a filter. The results demonstrate the filter's effectiveness and superiority in achieving optimal performance.</p> Manuscript profile -
Open Access Article
142 - The Mediating Role of Emotional Control in the Relationship Between Basic Psychological Needs and the Tendency to Use Drugs in Students
ali vatandost Arslan , Khan Mohammadi - Jamal Sadeghi Rajab Ali MohammadzadehThe present study was conducted with the aim of investigating the mediating role of emotional control in the relationship between basic psychological needs and the tendency to use drugs in students. The current research was carried out by correlation type and using the MoreThe present study was conducted with the aim of investigating the mediating role of emotional control in the relationship between basic psychological needs and the tendency to use drugs in students. The current research was carried out by correlation type and using the statistical method of structural equation modeling. The statistical population of the present study was all secondary school students of Noord city in the academic year of 1401-1400; And the research sample included 250 people who were selected by multi-stage cluster sampling method. The questionnaires that were considered to collect information from the sample group were: Substance Abuse Propensity Questionnaire (IAPS), Basic Psychological Needs Questionnaire (BSNQ; Guardia, Desi and Ryan, 2000), Emotional Control Scale (ECQ2) by Roger and Nashover (1987). Pearson correlation and structural equation modeling (SEM) were used for statistical analysis of data. The results showed that basic psychological needs have an effect on the tendency to use drugs both directly and indirectly through emotional control. In general, according to the results, it can be said that emotional control plays a mediating role in the relationship between basic psychological needs and the tendency to use drugs in students. Manuscript profile -
Open Access Article
143 - The effect of strategic choices and management control systems on organizational performance in Iran
Hossine Rahmanseresht seyyede somsye ghorbiThis research was conducted to study the effect of strategic choices and management control systems on organizational performance in small and medium-sized companies in Iran. In this article, contingency theory is used as the theoretical framework of the research. This MoreThis research was conducted to study the effect of strategic choices and management control systems on organizational performance in small and medium-sized companies in Iran. In this article, contingency theory is used as the theoretical framework of the research. This is a quantitative study in terms of research type. The survey method has been used as a research strategy and data collection method. The main tool of data collection in the research is a standard questionnaire, which is adapted based on the questionnaire used in the research of Junkira et al. (2018). Smart pls software was used for data analysis. The results of the research show that more competitive forces cause the formation of the strategy chosen by organizations, however, contrary to what the theoretical foundations predict, those companies that operate in more competitive environments choose a cost leadership strategy instead of choosing a differentiation strategy. . The design and use of management control systems is influenced by the strategy chosen by the company. In addition, the use of contemporary management methods is associated with differentiation strategy. The choice of strategy and management control systems in the organization has a significant positive effect on organizational performance. In addition, those companies that combine the differentiation strategy with contemporary management practices perform better than the other companies studied. Manuscript profile -
Open Access Article
144 - The Relationship Between Innovations in Power and Governance in the Thought of "Michel Foucault" and "Gilles Deleuze"
Mohammad Malekifar Ali Mokhtari hamdallah akvani Abuzar FatahizadehThe dominant view among liberal and Marxist thinkers indicates that the ruling power seeks to adopt a legal order within a specific territory. Therefore, the ruling power is considered as a system of legal obligations and prohibitions that are applied withinthe law. But MoreThe dominant view among liberal and Marxist thinkers indicates that the ruling power seeks to adopt a legal order within a specific territory. Therefore, the ruling power is considered as a system of legal obligations and prohibitions that are applied withinthe law. But thinkers such as "Michel Foucault" and "Gilles Deleuze" recognize a gap in governance mechanisms. Foucault believes that since the 17thand 18thcenturies, instead of legal prohibitions, the government sought to shape its subjects in a positive way and tried to cultivate normal and obedient subjects. In the continuation of Foucault's studies, Gilles Deleuze continues that 20thcentury governments by regulatory ways, tryto lead the subjects towards their goals. In consequence, this article tries to address the question of what factor causes change in the way of governance in Foucault's and Deleuze's thought? The phenomenological examination of the opinions of these two thinkers shows that the root of innovation to governancelies in power. Manuscript profile -
Open Access Article
145 - An Algorithm for Optimal Control of a Class of Linear Time Varying Systems with Computational Time Reduction and Increasing Its Speed Approach in Engineering Problems
Mehdi Yousefi Tabari Zahra Rahmani Ali Vahidian Kamyad Seyed Jalil SadatiTime-delay systems have been very much considered in the last few decades. Many of these time-delay systems appear in different systems and branches of science such as engineering, chemistry, physics, disease models. The presence of delay makes the analysis and control MoreTime-delay systems have been very much considered in the last few decades. Many of these time-delay systems appear in different systems and branches of science such as engineering, chemistry, physics, disease models. The presence of delay makes the analysis and control of such systems much more complicated. In fact, the application of Pontryagin’s maximum principle to the optimal control problems with time-delay results in boundary value problem involving both delay and advance terms. In this paper, we consider a time-delay optimal control problems. The first section, using the Pontryagin's maximum principle for optimal control problems with time delay, the necessary optimality conditions for this problem, are obtained. Then a new algorithm is proposed to solve this problem numerically. This algorithm is based on an approximation for derivatives and linear interpolation for delayed arguments. Finally, the resulting equations becomes a linear programming problem that can be solved numerically. The efficiency of the proposed method is evaluated by solving several numerical examples. Manuscript profile -
Open Access Article
146 - Stabilizing and Synchronizing the Islanded Microgrid with the Presence of Sensor and Actuator Fault and Cyber-Attack with Secondary Controller Design
Abdollah Mirzabeigi Ali Kazemy Mehdi Ramezani Seyed Mohammad AzimiIn many microgrid control methods, the output information of sensors and actuators of neighbouring distributed generators (DGs) is used to stabilize and synchronize voltage and frequency. Many problems such as disturbances, uncertainty, unmodeled dynamics, cyber-attacks MoreIn many microgrid control methods, the output information of sensors and actuators of neighbouring distributed generators (DGs) is used to stabilize and synchronize voltage and frequency. Many problems such as disturbances, uncertainty, unmodeled dynamics, cyber-attacks, noise, time delay, and measurement errors cause invalid data problems and errors in the system. Better microgrid control depends on the quality of data measured or sent from the output of sensors and actuators. In this paper, according to the advantages of the Cooperative distributed hierarchical control, it is used for control and synchronization in the islanded microgrid with the presence of sensor and actuator error. To synchronize DGs with multi-agent systems and communication channels, it is modeled with graph theory. To stabilize and synchronize, sensor and actuator error in the DG model is mathematically formulated. In the proof of stability and synchronization, the appropriate Lyapunov candidate is presented and the conditions of stability and synchronization are proved. Finally, to show the effectiveness of the designed controller in solving communication channel problems and verifying the presented theory, a case study is simulated in the MATLAB/Simulink software environment with the presence of error and cyber-attack of sensors and actuators. Manuscript profile -
Open Access Article
147 - Data-Driven Sliding Mode Control Based on Projection Recurrent Neural Network for HIV Infection: A Singular Value Approach
Ashkan Zarghami mehdi Siahi Fereidoun Nowshiravan RahatabadIn the present study, drug treatment of HIV infection is investigated using a Data-Driven Sliding Mode Control (DDSMC) combined with a Projection Recurrent Neural Network (PRNN). The major objective is to establish the control law that eliminates the need for HIV infect MoreIn the present study, drug treatment of HIV infection is investigated using a Data-Driven Sliding Mode Control (DDSMC) combined with a Projection Recurrent Neural Network (PRNN). The major objective is to establish the control law that eliminates the need for HIV infection mathematical formulae and ensures that the physical limits of the actuator are reached. This is accomplished by creating the concepts of model-free adaptive control, in which the relation between input and output is described using local dynamic linearized models based on quasi-partial derivatives. To determine the DDSMC law, a performance index is first defined based on the fulfillment of a discrete-time exponential reaching condition. By turning this index into a quadratic programming problem, the dynamics of the PRNN are extracted based on projection theory. The closed-loop system is explicitly determined using the optimizer output equation and the closed-loop stability analysis is evaluated using the singular value approach. The simulation results reveal that the proposed algorithm has robust performance in conducting the state variables of HIV infection to the healthy equilibrium point in the face of model uncertainty and external disturbances when compared to one of the newest control techniques. Manuscript profile -
Open Access Article
148 - Multi-Objective Predictive Control of Two-Motor Drive System with Five-Leg Inverter
Reza Mohammadi Nik Mohammad Reza Alizadeh Pahlavani Arash Dehestani KolagarDual-motor drive systems have been widely favored due to many advantages, including reduced dimensions and cost. In this paper, a model-based predictive control (MPC) method for a dual-motor drive system fed by a five-leg inverter (FLI) is introduced. Among the advantag MoreDual-motor drive systems have been widely favored due to many advantages, including reduced dimensions and cost. In this paper, a model-based predictive control (MPC) method for a dual-motor drive system fed by a five-leg inverter (FLI) is introduced. Among the advantages of the MPC method, the independent and fast tracking of reference control variables and the elimination of cascade control structures dependent on the modulator for multi-motor systems can be mentioned. PI loops have disadvantages such as delayed time response, as well as design limitations of PI coefficients due to the FLI structure. In this paper, using the predictive control method based on the multi-objective model proportional to speed and current (MOMPC), the PI control loops have been removed. One of the challenges of this structure is how to allocate the DC link voltage to the motors. For this purpose, by defining the duty cycle corresponding to the steady-state voltage of the motors, the DC link voltage of the inverter is shared between the motors. In addition, by using this method, the control objectives of two motors become independent from each other, which reduce the torque ripple and current ripple of the motors. Manuscript profile -
Open Access Article
149 - Design and Implementation of Model-Free Predictive Current and Speed Control of Surface Permanent Magnet Synchronous Motor using a Robust Nonlinear Disturbance Observer Against of Variation of Parameters and Disturbances
Mohammad Bagher SepahKar Abolfazl Halvaei NiasarIn the drive control of permanent magnet synchronous motors (PMSMs), the control system must be designed to work in different conditions and against of changes in motor parameters and unknown disturbances. In order to enhance the drive performance of PMSM motor, the mod MoreIn the drive control of permanent magnet synchronous motors (PMSMs), the control system must be designed to work in different conditions and against of changes in motor parameters and unknown disturbances. In order to enhance the drive performance of PMSM motor, the model-predictive control independent of current and speed model (MFPCSC) is proposed in this article. This method only uses the input and output of the system and does not involve the motor parameters in the drive control, and it is robust to the changes of the motor parameters. The conventional model-independent predictive control method requires setting several control parameters. To improve the performance of the drive system of this motor and make it robust to changes in parameters and disturbances, the proposed MFPCSC method is designed based on the nonlinear disturbance observer (NDO). This observer can estimate system disturbances with more accuracy and stability, and the amount of calculations is small. The simulation and practical test results of the proposed MFPCSC method combined with the NDO show that the proposed control method has high robustness to parameter changes, favorable transient response, small output ripple, and improved transient characteristics, and can accurately and stably estimate system disturbances. Manuscript profile -
Open Access Article
150 - Analysis and Implementation of a Step-Down DC-DC Converter with a New Control Method to Reduce Converter Losses
Mohamad Reza Banaei sajad gabeli saniA step-down converter based on buck and buck-boost converters with a loss reduction technique is proposed in this paper. Utilizing non-electrolytic capacitors in the implementation of the proposed converter has resulted in an increase in circuit life and a reduction in MoreA step-down converter based on buck and buck-boost converters with a loss reduction technique is proposed in this paper. Utilizing non-electrolytic capacitors in the implementation of the proposed converter has resulted in an increase in circuit life and a reduction in weight and volume. This paper compares the proposed converter to other buck converters. To increase the output efficiency of the converter in comparison to other structures, a new method based on determining the working duty-cycles has been employed to reduce the losses of the converter, resulting in an increase in the converter's output efficiency. In order to demonstrate the differences in efficiency between the proposed method and the conventional method, the efficiency of the converter has been calculated using real-world conditions and the output loss results have been compared. In addition, the proposed converter has a common ground with the input source and has a suitable reduction gain. Finally, this converter has been implemented as a PCB and tested with 100 watts of output power. Manuscript profile -
Open Access Article
151 - Test case Selection based on Test-Driven Development
Zohreh Mafi mirian mirianTest-Driven Development (TDD) is one of the test-first software production methods in which the production of each component of the code begins with writing the test case. This method has been noticed due to many advantages, including the readable, regular and short cod MoreTest-Driven Development (TDD) is one of the test-first software production methods in which the production of each component of the code begins with writing the test case. This method has been noticed due to many advantages, including the readable, regular and short code, as well as increasing the quality, productivity and reliability, and the possibility of regression testing due to the creation of a comprehensive set of unit tests. The large number of unit test cases produced in this method is considered as a strong point in order to increase the reliability of the code, however, the repeated execution of test cases increases the duration of the regression testing in this method. The purpose of this article is to present an algorithm for selecting test cases to reduce the time of the regression test in TDD method. So far, various ideas have been proposed to select test cases and reduce the regression test time. Most of these ideas are based on programming language and software production methods. The idea presented in this article is based on the program difference method and the nature of the TDD method. In this method, meaningful semantic and structural connections are created between unit tests and code blocks, and the test case selection is done based on these relationships. Manuscript profile -
Open Access Article
152 - Transition from Monarchical Rule to Innovative Governance Based on the Techniques of Transparency and Control (From Abbas Mirza to Amir Kabir)
hadi keshavarzThis study aims to analyze the governance patterns in Iran before and after the Iran-Russia wars, and their relationship with the environment. Two major governance patterns and two different rationalities in the exercise of power, in terms of method, scope, and perspect MoreThis study aims to analyze the governance patterns in Iran before and after the Iran-Russia wars, and their relationship with the environment. Two major governance patterns and two different rationalities in the exercise of power, in terms of method, scope, and perspective, are discussed. Using a descriptive-analytical approach and documents, the governance process is examined from the perspective of Michel Foucault's governmentality framework, and the relationship between the environment, politics, and the formation of a new rationality in governance in Iran is explored. The research question is: "How did the formation and establishment of new governance mechanisms and techniques in Iran after the Iran-Russia wars take place, and what impact did it have on the relationship between the environment, politics, and the formation of new governance innovations in Iran? " The study argues that "with an awareness of the failure of governance based on the monarchy system, reformists gradually exposed society to the power of control and guidance of the population by creating new techniques and institutions, and established new governance innovations. " In general, two strategies can be identified in the administration of the territory after the Iran-Russia wars: the traditional strategy of the monarchy based on divine-political obligation and the strategy of new governance innovations based on new techniques, each leaving a different form of the relationship between the environment and politics in terms of the mode of exercising power, the scope of power, and the control perspective. Manuscript profile -
Open Access Article
153 - Analysis of the Effects of Different Cyber Attacks on the Secondary Controller in Island Microgrids
Abdollah Mirzabeigi ali kalantarniaWith the advancement of science, in many control methods, the neighbor system is used to better control and synchronize between different information of microgrids. There are problems in accessing and transmitting information through communication links. In this article MoreWith the advancement of science, in many control methods, the neighbor system is used to better control and synchronize between different information of microgrids. There are problems in accessing and transmitting information through communication links. In this article, vulnerability and acceptance of secondary control methods are distributed. Also, denial-of-service (DoS) cyber-attacks, sensors and actuators, and hijacking on the island microgrid have been investigated. In addition to stability, synchronization is also analyzed in this article. Multi-agent systems have been used for synchronization. Cyber-attacks are mathematically formulated in the controller. A suitable controller is designed to eliminate the attacks. In the stability and synchronization of frequency and voltage, the Lyapunov function is presented and simultaneous analysis of stability and synchronization has been done with practical proofs. The resilience factor has been calculated for different attacks. It is shown that the system is resilient against cyber-attacks. A case study has been simulated in MATLAB/Simulink to approve the theoretical issues. Manuscript profile -
Open Access Article
154 - Design of Distributed Consensus Controller for Leader-Follower Singular Multi-Agent Systems in the Presence of Sensor Fault
Saeid Poormirzaee Hamidreza Ahmadzadeh masoud ShafieeIn this paper, the problem of sensor fault estimation and designing of a distributed fault-tolerant controller is investigated to guarantee the leader-follower consensus for homogeneous singular multi-agent systems for the first time. First, a novel augmented model for MoreIn this paper, the problem of sensor fault estimation and designing of a distributed fault-tolerant controller is investigated to guarantee the leader-follower consensus for homogeneous singular multi-agent systems for the first time. First, a novel augmented model for the system is proposed. It is shown that the proposed model is regular and impulse-free unlike some similar research works. Based on this model, the state and sensor fault of the system are simultaneously estimated by designing a distributed singular observer. The proposed observer also has the ability to estimate time-varying sensor fault. Then, a distributed controller is designed to guarantee the leader-follower consensus using estimation of state and sensor fault. The sufficeient conditions to ensure the stability of the observer dynamic and consensus dynamic are drived in terms of linear matrix inequalities (LMIs). The gains of observer and controller are computed by solving these conditions with MATLAB software. Finally, the validation and efficiency of the proposed control system for the leader-follower consensus of singular multi-agent systems exposed to sensor faults is illustrated by computer simulations. The simulation results show that the propsed control strategy deeling to the sensor falut in the singular multi-agent systems is effective. Manuscript profile -
Open Access Article
155 - An Intrusion Detection System based on Deep Learning for CAN Bus
Fatemeh Asghariyan Mohsen RajiIn recent years, with the advancement of automotive electronics and the development of modern vehicles with the help of embedded systems and portable equipment, in-vehicle networks such as the controller area network (CAN) have faced new security risks. Since the CAN bu MoreIn recent years, with the advancement of automotive electronics and the development of modern vehicles with the help of embedded systems and portable equipment, in-vehicle networks such as the controller area network (CAN) have faced new security risks. Since the CAN bus lacks security systems such as authentication and encryption to deal with cyber-attacks, the need for an intrusion detection system to detect attacks on the CAN bus seem to be very necessary. In this paper, a deep adversarial neural network (DACNN) is proposed to detect various types of security intrusions in CAN buses. For this purpose, the DACNN method, which is an extension of the CNN method using adversarial learning, detects intrusion in three stages; In the first stage, CNN acts as a feature descriptor and the main features are extracted, and in the second stage, the discriminating classifier classifies these features and finally, the intrusion is detected using the adversarial learning. In order to show the efficiency of the proposed method, a real open source dataset was used in which the CAN network traffic on a real vehicle during message injection attacks is recorded on a real vehicle. The obtained results show that the proposed method performs better than other machine learning methods in terms of false negative rate and error rate, which is less than 0.1% for DoS and drive gear forgery attack and RPM forgery attack while this rate is less than 0.5% for fuzzy attack. Manuscript profile -
Open Access Article
156 - The Effect Of Cognitive Rehabilitation of Inhibitory Control on Hot Executive Functions: Risky Decision Making and Time Perception in Children with Attention Deficit/Hyperactivity Disorder
Batool Najjari Alamooti Javid Peymani Maryam Bahrami Hidaji Sheida Sodagar nahid Soomer havassiAbstract: The present study was conducted with the aim of investigating the effect of inhibitory control cognitive rehabilitation on hot executive functions: risky decision making and time perception in children with attention deficit/hyperactivity disorder. The resear MoreAbstract: The present study was conducted with the aim of investigating the effect of inhibitory control cognitive rehabilitation on hot executive functions: risky decision making and time perception in children with attention deficit/hyperactivity disorder. The research design was semi-experimental with a pre-test, post-test and follow-up with a control group. The statistical population includes male and female students between 7 and 12 years old in elementary schools of Tehran in the academic year 2020-2021 who were suffering from attention deficit/ hyperactiv ity disorder. Among them, 30 students were selected by purposeful sampling method and randomly placed in the experimental and control groups. The SNAP-IV Questionnaire, the Computerized Task Risk Analogue Balloon (BART) and the Time Reproduction Computer Task were used to collect information. For data analysis, using SPSS24 software, variance analysis method with repeated measurements was used. The results showed that there is difference in the perfor-mance of the experimen tal group and the control group in the components of: risky decision making and time perception for long-term intervals (P<0.05). However, compared to the control group, no significant difference was shown between the time reproduction component for short-term intervals in the experimental group. According to the results structured games aimed at enhancing interference inhibition and responding can improve hot executive functions, risky decision making and time perception (long-term intervals) in students with attention-deficit/hyperactivity disorder. Manuscript profile -
Open Access Article
157 - FLHB-AC: Federated Learning History-Based Access Control Using Deep Neural Networks in Healthcare System
Nasibeh Mohammadi Afshin Rezakhani Hamid Haj Seyyed Javadi Parvaneh asghariGiving access permission based on histories of access is now one of the security needs in healthcare systems. However, current access control systems are unable to review all access histories online to provide access permission. As a result, this study first proposes a MoreGiving access permission based on histories of access is now one of the security needs in healthcare systems. However, current access control systems are unable to review all access histories online to provide access permission. As a result, this study first proposes a method to perform access control in healthcare systems in real time based on access histories and the decision of the suggested intelligent module. The data is used to train the intelligent module using the LSTM time series machine learning model. Medical data, on the other hand, cannot be obtained from separate systems and trained using different machine-learning models due to the sensitivity and privacy of medical records. As a result, the suggested solution employs the federated learning architecture, which remotely performs machine learning algorithms on healthcare systems and aggregates the knowledge gathered in the servers in the second phase. Based on the experiences of all healthcare systems, the servers communicate the learning aggregation back to the systems to control access to resources. The experimental results reveal that the accuracy of history-based access control in local healthcare systems before the application of the suggested method is lower than the accuracy of the access control in these systems after aggregating training with federated learning architecture. Manuscript profile -
Open Access Article
158 - The Role of Conscious Control Propensity in Determining the Effects of Attentional Foci instructions
Mohammad Tollabi Elaheh Arab Ameri Mehdi Shahbazi Alireza Babaei Mazreno Fatemeh Sadat TabatabaeiBackground: In this research, we investigated the role of conscious control propensity in determining the effects of attentional foci on performance and learning of basketball accuracy pass in children (10-12 years old). Materials and Methods: To determine the children MoreBackground: In this research, we investigated the role of conscious control propensity in determining the effects of attentional foci on performance and learning of basketball accuracy pass in children (10-12 years old). Materials and Methods: To determine the children’s conscious control propensity, the Movement Specific Reinvestment Scale was used. Seventy-two children in two high and low conscious control groups that each group divided to three sub-groups (internal, external, and control) entered the acquisition and transfer and retention tests in the basketball accuracy pass task. Results: The results showed that during the acquisition period, low and high conscious control propensity did not have any effect. Though there was a significant interaction between conscious control propensity and attentional foci in transfer and retention tests, but the main effects were not significant. Conclusion: Based on these results, children's motor learning is more effective when the instructions for attentional foci suited their natural tendencies. Manuscript profile -
Open Access Article
159 - Comparison of FCS-MPC Predictive Control and Predictive Control Based on Lyapunov Theory in Seven-Level PUC Rectifier
Alimohammad Mohammadpour Behbid Mohammad Reza Alizadeh Pahlavani Arash Dehestani Kolagar Alireza DavariIn this paper, two predictive control methods for dual output multilevel rectifier are compared. The investigated structure is a seven-level PUC rectifier, which was selected based on high reliability and low cost. Increasing the number of input voltage levels helps to MoreIn this paper, two predictive control methods for dual output multilevel rectifier are compared. The investigated structure is a seven-level PUC rectifier, which was selected based on high reliability and low cost. Increasing the number of input voltage levels helps to reduce the amount of harmonics and consequently reduce the size of power filters. On the other hand, current conduction in this converter is performed continuously and the problems of current discontinuity such as complexity in analysis and the requirement to use large induction filters on the DC side are solved. First, the design is accomplished based on the FCS-MPC method and two different output voltages with ratios of 1 and 3 are obtained. Also, the control of output DC voltages and unity input power factor is well provided. Then, to achieve better stability, the MPC method based on Lyapunov theory has been utilized. In this method, the target variables are defined in the Lyapunov function and the cost function is derived from the same Lyapunov function. The advantages of this approach compared to the conventional MPC method are no need for gain adjustment, easier implementation and fewer sensors (the load current is estimated using the PUC7 rectifier mathematical model). The simulation of both FCS-MPC and predictive control based on Lyapunov method is carried out using Matlab/Simulink and the results of both methods are presented and compared with each other. Finally, it can be seen that in the Lyapunov-based method, the tracking of the reference current is smoother and with less fluctuations, and the seven-level rectifier voltage also has a more regular and sinusoidal waveform. Manuscript profile -
Open Access Article
160 - Nonlinear Fractional Intelligent Controller for Photovoltaic Inverters
Hadi Delavari Sara Arjmandpour<p style="text-align: justify; padding-right: 30px;"><!-- [if gte mso 9]><xml> <o:OfficeDocumentSettings> <o:TargetScreenSize>800x600</o:TargetScreenSize> </o:OfficeDocumentSettings> </xml><![endif]--><!-- [if gte mso 9]><xml> <w:WordDocument> <w:View>Norma More<p style="text-align: justify; padding-right: 30px;"><!-- [if gte mso 9]><xml> <o:OfficeDocumentSettings> <o:TargetScreenSize>800x600</o:TargetScreenSize> </o:OfficeDocumentSettings> </xml><![endif]--><!-- [if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:TrackMoves/> <w:TrackFormatting/> <w:PunctuationKerning/> <w:ValidateAgainstSchemas/> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:DoNotPromoteQF/> <w:LidThemeOther>EN-US</w:LidThemeOther> <w:LidThemeAsian>X-NONE</w:LidThemeAsian> <w:LidThemeComplexScript>FA</w:LidThemeComplexScript> <w:Compatibility> <w:BreakWrappedTables/> <w:SnapToGridInCell/> <w:WrapTextWithPunct/> <w:UseAsianBreakRules/> <w:DontGrowAutofit/> <w:SplitPgBreakAndParaMark/> <w:EnableOpenTypeKerning/> <w:DontFlipMirrorIndents/> <w:OverrideTableStyleHps/> </w:Compatibility> <w:BrowserLevel>MicrosoftInternetExplorer4</w:BrowserLevel> <m:mathPr> <m:mathFont m:val="Cambria Math"/> <m:brkBin m:val="before"/> <m:brkBinSub m:val="--"/> <m:smallFrac m:val="off"/> <m:dispDef/> <m:lMargin m:val="0"/> <m:rMargin m:val="0"/> <m:defJc m:val="centerGroup"/> <m:wrapIndent m:val="1440"/> <m:intLim m:val="subSup"/> <m:naryLim m:val="undOvr"/> </m:mathPr></w:WordDocument> </xml><![endif]--><!-- [if gte mso 9]><xml> <w:LatentStyles DefLockedState="false" DefUnhideWhenUsed="false" DefSemiHidden="false" DefQFormat="false" DefPriority="99" LatentStyleCount="371"> <w:LsdException Locked="false" Priority="0" QFormat="true" Name="Normal"/> <w:LsdException Locked="false" Priority="9" QFormat="true" Name="heading 1"/> <w:LsdException Locked="false" Priority="9" SemiHidden="true" UnhideWhenUsed="true" QFormat="true" Name="heading 2"/> <w:LsdException Locked="false" Priority="9" SemiHidden="true" UnhideWhenUsed="true" QFormat="true" Name="heading 3"/> <w:LsdException Locked="false" Priority="9" SemiHidden="true" UnhideWhenUsed="true" QFormat="true" Name="heading 4"/> <w:LsdException Locked="false" Priority="9" SemiHidden="true" UnhideWhenUsed="true" QFormat="true" Name="heading 5"/> <w:LsdException Locked="false" Priority="9" SemiHidden="true" UnhideWhenUsed="true" QFormat="true" Name="heading 6"/> <w:LsdException Locked="false" Priority="9" SemiHidden="true" UnhideWhenUsed="true" QFormat="true" Name="heading 7"/> <w:LsdException Locked="false" Priority="9" SemiHidden="true" UnhideWhenUsed="true" QFormat="true" Name="heading 8"/> <w:LsdException Locked="false" Priority="9" SemiHidden="true" UnhideWhenUsed="true" QFormat="true" Name="heading 9"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="index 1"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="index 2"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="index 3"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="index 4"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="index 5"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="index 6"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="index 7"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="index 8"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="index 9"/> <w:LsdException Locked="false" Priority="39" SemiHidden="true" UnhideWhenUsed="true" Name="toc 1"/> <w:LsdException Locked="false" Priority="39" SemiHidden="true" UnhideWhenUsed="true" Name="toc 2"/> <w:LsdException Locked="false" Priority="39" SemiHidden="true" UnhideWhenUsed="true" Name="toc 3"/> <w:LsdException Locked="false" Priority="39" SemiHidden="true" UnhideWhenUsed="true" Name="toc 4"/> <w:LsdException Locked="false" Priority="39" SemiHidden="true" UnhideWhenUsed="true" Name="toc 5"/> <w:LsdException Locked="false" Priority="39" SemiHidden="true" UnhideWhenUsed="true" Name="toc 6"/> <w:LsdException Locked="false" Priority="39" SemiHidden="true" UnhideWhenUsed="true" Name="toc 7"/> <w:LsdException Locked="false" Priority="39" SemiHidden="true" UnhideWhenUsed="true" Name="toc 8"/> <w:LsdException Locked="false" Priority="39" SemiHidden="true" UnhideWhenUsed="true" Name="toc 9"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Normal Indent"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="footnote text"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="annotation text"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="header"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="footer"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="index heading"/> <w:LsdException Locked="false" Priority="35" SemiHidden="true" UnhideWhenUsed="true" QFormat="true" Name="caption"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="table of figures"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="envelope address"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="envelope return"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="footnote reference"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="annotation reference"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="line number"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="page number"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="endnote reference"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="endnote text"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="table of authorities"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="macro"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="toa heading"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="List"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="List Bullet"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="List Number"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="List 2"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="List 3"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="List 4"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="List 5"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="List Bullet 2"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="List Bullet 3"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="List Bullet 4"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="List Bullet 5"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="List Number 2"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="List Number 3"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="List Number 4"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="List Number 5"/> <w:LsdException Locked="false" Priority="10" QFormat="true" Name="Title"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Closing"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Signature"/> <w:LsdException Locked="false" Priority="0" SemiHidden="true" UnhideWhenUsed="true" Name="Default Paragraph Font"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Body Text"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Body Text Indent"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="List Continue"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="List Continue 2"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="List Continue 3"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="List Continue 4"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="List Continue 5"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Message Header"/> <w:LsdException Locked="false" Priority="11" QFormat="true" Name="Subtitle"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Salutation"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Date"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Body Text First Indent"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Body Text First Indent 2"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Note Heading"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Body Text 2"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Body Text 3"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Body Text Indent 2"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Body Text Indent 3"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Block Text"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Hyperlink"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="FollowedHyperlink"/> <w:LsdException Locked="false" Priority="22" QFormat="true" Name="Strong"/> <w:LsdException Locked="false" Priority="20" QFormat="true" Name="Emphasis"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Document Map"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Plain Text"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="E-mail Signature"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="HTML Top of Form"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="HTML Bottom of Form"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Normal (Web)"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="HTML Acronym"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="HTML Address"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="HTML Cite"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="HTML Code"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="HTML Definition"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="HTML Keyboard"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="HTML Preformatted"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="HTML Sample"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="HTML Typewriter"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="HTML Variable"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Normal Table"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="annotation subject"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="No List"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Outline List 1"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Outline List 2"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Outline List 3"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table Simple 1"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table Simple 2"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table Simple 3"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table Classic 1"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table Classic 2"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table Classic 3"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table Classic 4"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table Colorful 1"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table Colorful 2"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table Colorful 3"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table Columns 1"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table Columns 2"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table Columns 3"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table Columns 4"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table Columns 5"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table Grid 1"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table Grid 2"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table Grid 3"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table Grid 4"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table Grid 5"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table Grid 6"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table Grid 7"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table Grid 8"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table List 1"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table List 2"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table List 3"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table List 4"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table List 5"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table List 6"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table List 7"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table List 8"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table 3D effects 1"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table 3D effects 2"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table 3D effects 3"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table Contemporary"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table Elegant"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table Professional"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table Subtle 1"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table Subtle 2"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table Web 1"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table Web 2"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table Web 3"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Balloon Text"/> <w:LsdException Locked="false" Priority="39" Name="Table Grid"/> <w:LsdException Locked="false" SemiHidden="true" UnhideWhenUsed="true" Name="Table Theme"/> <w:LsdException Locked="false" SemiHidden="true" Name="Placeholder Text"/> <w:LsdException Locked="false" Priority="1" QFormat="true" Name="No Spacing"/> <w:LsdException Locked="false" Priority="60" Name="Light Shading"/> <w:LsdException Locked="false" Priority="61" Name="Light List"/> <w:LsdException Locked="false" Priority="62" Name="Light Grid"/> <w:LsdException Locked="false" Priority="63" Name="Medium Shading 1"/> <w:LsdException Locked="false" Priority="64" Name="Medium Shading 2"/> <w:LsdException Locked="false" Priority="65" Name="Medium List 1"/> <w:LsdException Locked="false" Priority="66" Name="Medium List 2"/> <w:LsdException Locked="false" Priority="67" Name="Medium Grid 1"/> <w:LsdException Locked="false" Priority="68" Name="Medium Grid 2"/> <w:LsdException Locked="false" Priority="69" Name="Medium Grid 3"/> <w:LsdException Locked="false" Priority="70" Name="Dark List"/> <w:LsdException Locked="false" Priority="71" Name="Colorful Shading"/> <w:LsdException Locked="false" Priority="72" Name="Colorful List"/> <w:LsdException Locked="false" Priority="73" Name="Colorful Grid"/> <w:LsdException Locked="false" Priority="60" Name="Light Shading Accent 1"/> <w:LsdException Locked="false" Priority="61" Name="Light List Accent 1"/> <w:LsdException Locked="false" Priority="62" Name="Light Grid Accent 1"/> <w:LsdException Locked="false" Priority="63" Name="Medium Shading 1 Accent 1"/> <w:LsdException Locked="false" Priority="64" Name="Medium Shading 2 Accent 1"/> <w:LsdException Locked="false" Priority="65" Name="Medium List 1 Accent 1"/> <w:LsdException Locked="false" SemiHidden="true" Name="Revision"/> <w:LsdException Locked="false" Priority="34" QFormat="true" Name="List Paragraph"/> <w:LsdException Locked="false" Priority="29" QFormat="true" Name="Quote"/> <w:LsdException Locked="false" Priority="30" QFormat="true" Name="Intense Quote"/> <w:LsdException Locked="false" Priority="66" Name="Medium List 2 Accent 1"/> <w:LsdException Locked="false" Priority="67" Name="Medium Grid 1 Accent 1"/> <w:LsdException Locked="false" Priority="68" Name="Medium Grid 2 Accent 1"/> <w:LsdException Locked="false" Priority="69" Name="Medium Grid 3 Accent 1"/> <w:LsdException Locked="false" Priority="70" Name="Dark List Accent 1"/> <w:LsdException Locked="false" Priority="71" Name="Colorful Shading Accent 1"/> <w:LsdException Locked="false" Priority="72" Name="Colorful List Accent 1"/> <w:LsdException Locked="false" Priority="73" Name="Colorful Grid Accent 1"/> <w:LsdException Locked="false" Priority="60" Name="Light Shading Accent 2"/> <w:LsdException Locked="false" Priority="61" Name="Light List Accent 2"/> <w:LsdException Locked="false" Priority="62" Name="Light Grid Accent 2"/> <w:LsdException Locked="false" Priority="63" Name="Medium Shading 1 Accent 2"/> <w:LsdException Locked="false" Priority="64" Name="Medium Shading 2 Accent 2"/> <w:LsdException Locked="false" Priority="65" Name="Medium List 1 Accent 2"/> <w:LsdException Locked="false" Priority="66" Name="Medium List 2 Accent 2"/> <w:LsdException Locked="false" Priority="67" Name="Medium Grid 1 Accent 2"/> <w:LsdException Locked="false" Priority="68" Name="Medium Grid 2 Accent 2"/> <w:LsdException Locked="false" Priority="69" Name="Medium Grid 3 Accent 2"/> <w:LsdException Locked="false" Priority="70" Name="Dark List Accent 2"/> <w:LsdException Locked="false" Priority="71" Name="Colorful Shading Accent 2"/> <w:LsdException Locked="false" Priority="72" Name="Colorful List Accent 2"/> <w:LsdException Locked="false" Priority="73" Name="Colorful Grid Accent 2"/> <w:LsdException Locked="false" Priority="60" Name="Light Shading Accent 3"/> <w:LsdException Locked="false" Priority="61" Name="Light List Accent 3"/> <w:LsdException Locked="false" Priority="62" Name="Light Grid Accent 3"/> <w:LsdException Locked="false" Priority="63" Name="Medium Shading 1 Accent 3"/> <w:LsdException Locked="false" Priority="64" Name="Medium Shading 2 Accent 3"/> <w:LsdException Locked="false" Priority="65" Name="Medium List 1 Accent 3"/> <w:LsdException Locked="false" Priority="66" Name="Medium List 2 Accent 3"/> <w:LsdException Locked="false" Priority="67" Name="Medium Grid 1 Accent 3"/> <w:LsdException Locked="false" Priority="68" Name="Medium Grid 2 Accent 3"/> <w:LsdException Locked="false" Priority="69" Name="Medium Grid 3 Accent 3"/> <w:LsdException Locked="false" Priority="70" Name="Dark List Accent 3"/> <w:LsdException Locked="false" Priority="71" Name="Colorful Shading Accent 3"/> <w:LsdException Locked="false" Priority="72" Name="Colorful List Accent 3"/> <w:LsdException Locked="false" Priority="73" Name="Colorful Grid Accent 3"/> <w:LsdException Locked="false" Priority="60" Name="Light Shading Accent 4"/> <w:LsdException Locked="false" Priority="61" Name="Light List Accent 4"/> <w:LsdException Locked="false" Priority="62" Name="Light Grid Accent 4"/> <w:LsdException Locked="false" Priority="63" Name="Medium Shading 1 Accent 4"/> <w:LsdException Locked="false" Priority="64" Name="Medium Shading 2 Accent 4"/> <w:LsdException Locked="false" Priority="65" Name="Medium List 1 Accent 4"/> <w:LsdException Locked="false" Priority="66" Name="Medium List 2 Accent 4"/> <w:LsdException Locked="false" Priority="67" Name="Medium Grid 1 Accent 4"/> <w:LsdException Locked="false" Priority="68" Name="Medium Grid 2 Accent 4"/> <w:LsdException Locked="false" Priority="69" Name="Medium Grid 3 Accent 4"/> <w:LsdException Locked="false" Priority="70" Name="Dark List Accent 4"/> <w:LsdException Locked="false" Priority="71" Name="Colorful Shading Accent 4"/> <w:LsdException Locked="false" Priority="72" Name="Colorful List Accent 4"/> <w:LsdException Locked="false" Priority="73" Name="Colorful Grid Accent 4"/> <w:LsdException Locked="false" Priority="60" Name="Light Shading Accent 5"/> <w:LsdException Locked="false" Priority="61" Name="Light List Accent 5"/> <w:LsdException Locked="false" Priority="62" Name="Light Grid Accent 5"/> <w:LsdException Locked="false" Priority="63" Name="Medium Shading 1 Accent 5"/> <w:LsdException Locked="false" Priority="64" Name="Medium Shading 2 Accent 5"/> <w:LsdException Locked="false" Priority="65" Name="Medium List 1 Accent 5"/> <w:LsdException Locked="false" Priority="66" Name="Medium List 2 Accent 5"/> <w:LsdException Locked="false" Priority="67" Name="Medium Grid 1 Accent 5"/> <w:LsdException Locked="false" Priority="68" Name="Medium Grid 2 Accent 5"/> <w:LsdException Locked="false" Priority="69" Name="Medium Grid 3 Accent 5"/> <w:LsdException Locked="false" Priority="70" Name="Dark List Accent 5"/> <w:LsdException Locked="false" Priority="71" Name="Colorful Shading Accent 5"/> <w:LsdException Locked="false" Priority="72" Name="Colorful List Accent 5"/> <w:LsdException Locked="false" Priority="73" Name="Colorful Grid Accent 5"/> <w:LsdException Locked="false" Priority="60" Name="Light Shading Accent 6"/> <w:LsdException Locked="false" Priority="61" Name="Light List Accent 6"/> <w:LsdException Locked="false" Priority="62" Name="Light Grid Accent 6"/> <w:LsdException Locked="false" Priority="63" Name="Medium Shading 1 Accent 6"/> <w:LsdException Locked="false" Priority="64" Name="Medium Shading 2 Accent 6"/> <w:LsdException Locked="false" Priority="65" Name="Medium List 1 Accent 6"/> <w:LsdException Locked="false" Priority="66" Name="Medium List 2 Accent 6"/> <w:LsdException Locked="false" Priority="67" Name="Medium Grid 1 Accent 6"/> <w:LsdException Locked="false" Priority="68" Name="Medium Grid 2 Accent 6"/> <w:LsdException Locked="false" Priority="69" Name="Medium Grid 3 Accent 6"/> <w:LsdException Locked="false" Priority="70" Name="Dark List Accent 6"/> <w:LsdException Locked="false" Priority="71" Name="Colorful Shading Accent 6"/> <w:LsdException Locked="false" Priority="72" Name="Colorful List Accent 6"/> <w:LsdException Locked="false" Priority="73" Name="Colorful Grid Accent 6"/> <w:LsdException Locked="false" Priority="19" QFormat="true" Name="Subtle Emphasis"/> <w:LsdException Locked="false" Priority="21" QFormat="true" Name="Intense Emphasis"/> <w:LsdException Locked="false" Priority="31" QFormat="true" Name="Subtle Reference"/> <w:LsdException Locked="false" Priority="32" QFormat="true" Name="Intense Reference"/> <w:LsdException Locked="false" Priority="33" QFormat="true" Name="Book Title"/> <w:LsdException Locked="false" Priority="37" SemiHidden="true" UnhideWhenUsed="true" Name="Bibliography"/> <w:LsdException Locked="false" Priority="39" SemiHidden="true" UnhideWhenUsed="true" QFormat="true" Name="TOC Heading"/> <w:LsdException Locked="false" Priority="41" Name="Plain Table 1"/> <w:LsdException Locked="false" Priority="42" Name="Plain Table 2"/> <w:LsdException Locked="false" Priority="43" Name="Plain Table 3"/> <w:LsdException Locked="false" Priority="44" Name="Plain Table 4"/> <w:LsdException Locked="false" Priority="45" Name="Plain Table 5"/> <w:LsdException Locked="false" Priority="40" Name="Grid Table Light"/> <w:LsdException Locked="false" Priority="46" Name="Grid Table 1 Light"/> <w:LsdException Locked="false" Priority="47" Name="Grid Table 2"/> <w:LsdException Locked="false" Priority="48" Name="Grid Table 3"/> <w:LsdException Locked="false" Priority="49" Name="Grid Table 4"/> <w:LsdException Locked="false" Priority="50" Name="Grid Table 5 Dark"/> <w:LsdException Locked="false" Priority="51" Name="Grid Table 6 Colorful"/> <w:LsdException Locked="false" Priority="52" Name="Grid Table 7 Colorful"/> <w:LsdException Locked="false" Priority="46" Name="Grid Table 1 Light Accent 1"/> <w:LsdException Locked="false" Priority="47" Name="Grid Table 2 Accent 1"/> <w:LsdException Locked="false" Priority="48" Name="Grid Table 3 Accent 1"/> <w:LsdException Locked="false" Priority="49" Name="Grid Table 4 Accent 1"/> <w:LsdException Locked="false" Priority="50" Name="Grid Table 5 Dark Accent 1"/> <w:LsdException Locked="false" Priority="51" Name="Grid Table 6 Colorful Accent 1"/> <w:LsdException Locked="false" Priority="52" Name="Grid Table 7 Colorful Accent 1"/> <w:LsdException Locked="false" Priority="46" Name="Grid Table 1 Light Accent 2"/> <w:LsdException Locked="false" Priority="47" Name="Grid Table 2 Accent 2"/> <w:LsdException Locked="false" Priority="48" Name="Grid Table 3 Accent 2"/> <w:LsdException Locked="false" Priority="49" Name="Grid Table 4 Accent 2"/> <w:LsdException Locked="false" Priority="50" Name="Grid Table 5 Dark Accent 2"/> <w:LsdException Locked="false" Priority="51" Name="Grid Table 6 Colorful Accent 2"/> <w:LsdException Locked="false" Priority="52" Name="Grid Table 7 Colorful Accent 2"/> <w:LsdException Locked="false" Priority="46" Name="Grid Table 1 Light Accent 3"/> <w:LsdException Locked="false" Priority="47" Name="Grid Table 2 Accent 3"/> <w:LsdException Locked="false" Priority="48" Name="Grid Table 3 Accent 3"/> <w:LsdException Locked="false" Priority="49" Name="Grid Table 4 Accent 3"/> <w:LsdException Locked="false" Priority="50" Name="Grid Table 5 Dark Accent 3"/> <w:LsdException Locked="false" Priority="51" Name="Grid Table 6 Colorful Accent 3"/> <w:LsdException Locked="false" Priority="52" Name="Grid Table 7 Colorful Accent 3"/> <w:LsdException Locked="false" Priority="46" Name="Grid Table 1 Light Accent 4"/> <w:LsdException Locked="false" Priority="47" Name="Grid Table 2 Accent 4"/> <w:LsdException Locked="false" Priority="48" Name="Grid Table 3 Accent 4"/> <w:LsdException Locked="false" Priority="49" Name="Grid Table 4 Accent 4"/> <w:LsdException Locked="false" Priority="50" Name="Grid Table 5 Dark Accent 4"/> <w:LsdException Locked="false" Priority="51" Name="Grid Table 6 Colorful Accent 4"/> <w:LsdException Locked="false" Priority="52" Name="Grid Table 7 Colorful Accent 4"/> <w:LsdException Locked="false" Priority="46" Name="Grid Table 1 Light Accent 5"/> <w:LsdException Locked="false" Priority="47" Name="Grid Table 2 Accent 5"/> <w:LsdException Locked="false" Priority="48" Name="Grid Table 3 Accent 5"/> <w:LsdException Locked="false" Priority="49" Name="Grid Table 4 Accent 5"/> <w:LsdException Locked="false" Priority="50" Name="Grid Table 5 Dark Accent 5"/> <w:LsdException Locked="false" Priority="51" Name="Grid Table 6 Colorful Accent 5"/> <w:LsdException Locked="false" Priority="52" Name="Grid Table 7 Colorful Accent 5"/> <w:LsdException Locked="false" Priority="46" Name="Grid Table 1 Light Accent 6"/> <w:LsdException Locked="false" Priority="47" Name="Grid Table 2 Accent 6"/> <w:LsdException Locked="false" Priority="48" Name="Grid Table 3 Accent 6"/> <w:LsdException Locked="false" Priority="49" Name="Grid Table 4 Accent 6"/> <w:LsdException Locked="false" Priority="50" Name="Grid Table 5 Dark Accent 6"/> <w:LsdException Locked="false" Priority="51" Name="Grid Table 6 Colorful Accent 6"/> <w:LsdException Locked="false" Priority="52" Name="Grid Table 7 Colorful Accent 6"/> <w:LsdException Locked="false" Priority="46" Name="List Table 1 Light"/> <w:LsdException Locked="false" Priority="47" Name="List Table 2"/> <w:LsdException Locked="false" Priority="48" Name="List Table 3"/> <w:LsdException Locked="false" Priority="49" Name="List Table 4"/> <w:LsdException Locked="false" Priority="50" Name="List Table 5 Dark"/> <w:LsdException Locked="false" Priority="51" Name="List Table 6 Colorful"/> <w:LsdException Locked="false" Priority="52" Name="List Table 7 Colorful"/> <w:LsdException Locked="false" Priority="46" Name="List Table 1 Light Accent 1"/> <w:LsdException Locked="false" Priority="47" Name="List Table 2 Accent 1"/> <w:LsdException Locked="false" Priority="48" Name="List Table 3 Accent 1"/> <w:LsdException Locked="false" Priority="49" Name="List Table 4 Accent 1"/> <w:LsdException Locked="false" Priority="50" Name="List Table 5 Dark Accent 1"/> <w:LsdException Locked="false" Priority="51" Name="List Table 6 Colorful Accent 1"/> <w:LsdException Locked="false" Priority="52" Name="List Table 7 Colorful Accent 1"/> <w:LsdException Locked="false" Priority="46" Name="List Table 1 Light Accent 2"/> <w:LsdException Locked="false" Priority="47" Name="List Table 2 Accent 2"/> <w:LsdException Locked="false" Priority="48" Name="List Table 3 Accent 2"/> <w:LsdException Locked="false" Priority="49" Name="List Table 4 Accent 2"/> <w:LsdException Locked="false" Priority="50" Name="List Table 5 Dark Accent 2"/> <w:LsdException Locked="false" Priority="51" Name="List Table 6 Colorful Accent 2"/> <w:LsdException Locked="false" Priority="52" Name="List Table 7 Colorful Accent 2"/> <w:LsdException Locked="false" Priority="46" Name="List Table 1 Light Accent 3"/> <w:LsdException Locked="false" Priority="47" Name="List Table 2 Accent 3"/> <w:LsdException Locked="false" Priority="48" Name="List Table 3 Accent 3"/> <w:LsdException Locked="false" Priority="49" Name="List Table 4 Accent 3"/> <w:LsdException Locked="false" Priority="50" Name="List Table 5 Dark Accent 3"/> <w:LsdException Locked="false" Priority="51" Name="List Table 6 Colorful Accent 3"/> <w:LsdException Locked="false" Priority="52" Name="List Table 7 Colorful Accent 3"/> <w:LsdException Locked="false" Priority="46" Name="List Table 1 Light Accent 4"/> <w:LsdException Locked="false" Priority="47" Name="List Table 2 Accent 4"/> <w:LsdException Locked="false" Priority="48" Name="List Table 3 Accent 4"/> <w:LsdException Locked="false" Priority="49" Name="List Table 4 Accent 4"/> <w:LsdException Locked="false" Priority="50" Name="List Table 5 Dark Accent 4"/> <w:LsdException Locked="false" Priority="51" Name="List Table 6 Colorful Accent 4"/> <w:LsdException Locked="false" Priority="52" Name="List Table 7 Colorful Accent 4"/> <w:LsdException Locked="false" Priority="46" Name="List Table 1 Light Accent 5"/> <w:LsdException Locked="false" Priority="47" Name="List Table 2 Accent 5"/> <w:LsdException Locked="false" Priority="48" Name="List Table 3 Accent 5"/> <w:LsdException Locked="false" Priority="49" Name="List Table 4 Accent 5"/> <w:LsdException Locked="false" Priority="50" Name="List Table 5 Dark Accent 5"/> <w:LsdException Locked="false" Priority="51" Name="List Table 6 Colorful Accent 5"/> <w:LsdException Locked="false" Priority="52" Name="List Table 7 Colorful Accent 5"/> <w:LsdException Locked="false" Priority="46" Name="List Table 1 Light Accent 6"/> <w:LsdException Locked="false" Priority="47" Name="List Table 2 Accent 6"/> <w:LsdException Locked="false" Priority="48" Name="List Table 3 Accent 6"/> <w:LsdException Locked="false" Priority="49" Name="List Table 4 Accent 6"/> <w:LsdException Locked="false" Priority="50" Name="List Table 5 Dark Accent 6"/> <w:LsdException Locked="false" Priority="51" Name="List Table 6 Colorful Accent 6"/> <w:LsdException Locked="false" Priority="52" Name="List Table 7 Colorful Accent 6"/> </w:LatentStyles> </xml><![endif]--><!-- [if gte mso 10]> <style> /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0mm 5.4pt 0mm 5.4pt; mso-para-margin:0mm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman",serif;} </style> <![endif]--><span style="font-size: 10.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">At present, with the significant growth of energy consumption, increase of greenhouse gases and environmental pollutants, more attention is directed toward renewable energies. Renewable energies include geothermal, wind, photovoltaic energy and etc. Among the advantages of photovoltaic energy, its wide range and easy access, helping to preserve the environment, compatibility with distributed power networks, low noise, quick installation and lower cost compared to other energies can be noted. Important challenges facing photovoltaic systems are changing climatic conditions and parameters variation that affect the performance of the system. In this paper, to track the maximum power point in a photovoltaic system, a fuzzy fractional order sliding mode controller based on disturbance observer and uncertainty estimator using neural network is designed. The sliding mode control is used to reduce chattering, neural network to estimate the system uncertainties, fuzzy system to estimate the coefficient of the signum function in the control law and disturbance observer to approximate the disturbances in the system. Also, the stability of the system has been proven using the Lyapunov method. The simulation results of the photovoltaic system confirm the effectiveness of the proposed method and shows satisfactory performance.</span></p> Manuscript profile -
Open Access Article
161 - The effectiveness of intervention cognitive bias modification towards smoking symptoms on Risky decision making and Inhibitory control of smokers
asghar sohrabi shekafti Ali pakizeh<p>Background and Aim: The aim of this study was to investigate the modification of cognitive bias towards the symptoms of smoking on risky decision making and inhibitory control in smokers. Materials and Methods: The current experimental research was conducted using a More<p>Background and Aim: The aim of this study was to investigate the modification of cognitive bias towards the symptoms of smoking on risky decision making and inhibitory control in smokers. Materials and Methods: The current experimental research was conducted using a pre-test and post-test design with a control group. The statistical population of the research included the smoking employees of Bushehr city in 2019. The research sample included 40 people who were randomly divided in tow groups of 20 people, experimental and control. The members of the experimental group participated in an 8-week software to cognitive bias modification towards smoking symptoms. The data was collected by the balloon analogue risk task software، inhibitory control questionnaire and the dot exploration task software in two stages before and after the intervention, and covariance analysis was used to analyze the data. Results: The results of the research showed that the intervention aimed at modifying the cognitive bias towards the symptoms of smoking lead to a significant reduction in the risky decision making and increase the inhibitory control of the experimental group. Conclusion: Considering the effectiveness of interventions aimed at modifying cognitive bias on reducing risky decision making and increase the inhibitory control It can be used to reduce the cognitive and emotional problems of smokers.</p> Manuscript profile -
Open Access Article
162 - Presenting a model for changing the structure of audit institutions with an approach to professional ethics
Hasan Saberi Mansoor Garkaz Ali Khozein alireza matoufiAlthough auditors may adhere to professional behavior to a certain extent, clear and continuous monitoring of auditors' behavior on the one hand and the existence of changes in the structures of auditing institutions on the other hand is important to maintain profession MoreAlthough auditors may adhere to professional behavior to a certain extent, clear and continuous monitoring of auditors' behavior on the one hand and the existence of changes in the structures of auditing institutions on the other hand is important to maintain professional ethics in order to control the quality of accounting work. It seems In this regard, the aim of the present study is to develop a model for changing the structure of audit institutions, focusing on the approach of professional ethics and quality control of audit work. The present study method is foundational data. The statistical population includes certified accountants, 11 of whom were selected as a statistical sample using the snowball method. Coding was done in three sections: open, central and selective coding. The results of the coding were categorized into six main categories, causal conditions, intervenors, strategy of actions, context and consequences. The requirements of environmental laws and organizational and individual barriers of institutions were placed in the category of background and context, and technical and developmental developments and the appointment and rewards of auditors in the category of intervening conditions, as well as the standardization of the structure of audit institutions and single organizational structures in the category of causal conditions. , operational policies of auditing institutions, skills and expertise of auditing institutions' members, and the needs and demands of auditing institutions' structures were placed in the category of actions and credibility of services in new structures, and adaptation to changes in new structures were placed in the category of consequences. It is hoped that the results of this study will be of great help to accounting institutions and people working in auditing institutions. Manuscript profile -
Open Access Article
163 - Regression Test Time Reduction in Test Driven Development
Zohreh Mafi mirian mirianTest-Driven Development (TDD) is one of the test-first software production methods in which the production of each component of the code begins with writing the test case. This method has been noticed due to many advantages, including the readable, regular, and short co MoreTest-Driven Development (TDD) is one of the test-first software production methods in which the production of each component of the code begins with writing the test case. This method has been noticed due to many advantages, including the readable, regular, and short code, as well as increasing quality, productivity, and reliability. The large number of unit test cases produced in this method is considered as an advantage (increases the reliability of the code), however, the repeated execution of test cases increases the regression test time. The purpose of this article is to present an algorithm for selecting test cases to reduce the time of the regression test in the TDD method. So far, various ideas have been proposed to select test cases. Most of these ideas are based on programming language and software production methods. The idea presented in this article is based on the program difference method and the nature of the TDD method, also a tool is written as a plugin in Java Eclipse. The provided tool consists of five main components: 1) Version Manager, 2) Code Segmentation, 3) Code Change Detection (in each version compared to the previous version), 4) Semantic Connection Creation (between unit tests and code blocks), and finally 5) Test Cases Selection. Manuscript profile
Rimag
Rimag is an integrated platform to accomplish all scientific journal requirements such as submission, evaluation, reviewing, editing, DOI assignment and publishing in the web.
Links
Related Centers
Technical Support
Official pages
The rights to this website are owned by the Raimag Press Management System.
Copyright © 2017-2024