List of Articles AEC

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  1 - Assessing the factors affecting China's economic interaction with selected trade blocs, Comparative study; Persian Gulf Cooperation Council and Eurasia
  mehrdad Alipour reza simbar
  Given China's urgent need for sustainable energy to reduce energy vulnerabilities and maximize its growing power in international politics and relations, the rising country has sought to build energy cooperation in recent years. A special political-economic relationship More

  Given China's urgent need for sustainable energy to reduce energy vulnerabilities and maximize its growing power in international politics and relations, the rising country has sought to build energy cooperation in recent years. A special political-economic relationship with the countries present in the GCC and the Eurasian Strategic Region will emerge. In this regard, the authors of the present study with a descriptive-analytical-comparative approach and based on library documents, have sought to answer the strategic question that the People's Republic of China in the light of deepening relations by analyzing and examining the growing presence of Beijing in these areas. What are its political and economic goals with the member states of the Persian Gulf Council and the actors in the Eurasian strategic sphere? The hypothesis raised by the above question is that Beijing, taking into account the economic weight of the countries present in the mentioned regions and given their special position in the belt-road initiative, has tried to pursue its new geopolitical strategies through effort. To ensure sustainable security of access to energy, maintain target markets based on the Belt-Road Initiative, as well as increase cooperation with regional partners, extend to the Persian Gulf and Eurasia. Manuscript profile
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  2 - Chinese activism in ASEAN; Efforts to maintain asymmetric economic dependence
  Morteza Noor Mohammadi Vahid Sharbati Mohaddese Heidari
  Despite all the opposition of members international organizations against China, over the past decade, Beijing has reached significant influence in international and regional organizations and is trying to improve It’s status in these organizations by shaping norms, rul More

  Despite all the opposition of members international organizations against China, over the past decade, Beijing has reached significant influence in international and regional organizations and is trying to improve It’s status in these organizations by shaping norms, rules and regulations. One of the most important regional organizations that has received a lot of attention from the Chinese authorities is ASEAN. An organization that can provide many benefits to Beijing. China's interests are now more intertwined with the ASEAN region than ever before; Relations between China and the union has become one of the most complex in the Asia-Pacific region and have recently seen positive changes in both the economic and political dimensions. Of course, the China’s interests of this deepening relationship have outweighed those of the ASEAN members, and this has become one of the concerns of Union officials in recent years. This article tries to examine the type of Chinese action in this regional organization based on the theory of asymmetric economic dependence. According to the article, China seeks to maintain and Promote ASEAN's asymmetric dependence on itself through the promotion of political and economic cooperation, and to prevent regional and international competitors from gaining strength in this organization. Manuscript profile
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  3 - An Acoustic Echo Canceller using Moving Window to Track Energy Variations of Double-Talk-Detector
  Mouldi  MAKDIR Mourad BENZIANE Mohamed  BOUAMAR
  10.61186/jist.40125.12.46.105
  As a fundamental device in acoustic echo cancellation (AEC) systems, the echo canceller based on adaptive filters relies on the adaptive approximation of the echo-path. However, the adaptive filter must face the risk of divergence during the double-talk periods when th More

  As a fundamental device in acoustic echo cancellation (AEC) systems, the echo canceller based on adaptive filters relies on the adaptive approximation of the echo-path. However, the adaptive filter must face the risk of divergence during the double-talk periods when the near-end is present. To solve this problem, the double-talk-detector (DTD) is often used to detect the double-talk periods and prevent the echo canceller from being disturbed by the other end of the speaker’s signal. In this paper, we propose a DTD based on a new method that can detect quickly and track accurately double-talk periods. It is based on the sum of energies of the estimated echo and the microphone signals which is continuously compared to the error energy. A window that moves with time and tracks energy variations of the different input signals of the DTD represents a fundamental feature of the proposed method compared to several other methods based on correlation. The goal is to outperform conventional normalized cross-correlation (NCC) methods which are well-known in terms of small steady-state misalignment and stability of decision variable. In this work, the normalized least mean squares (NLMS) algorithm is used to update the filter coefficients along speech signals which are taken from the NOIZEUS database. Efficiency of the proposed method is particularly compared to the conventional Geigel algorithm and normalized cross-correlation method (NCC) that depends on the cross-correlation between the microphone signal and the error signal of AEC. Performance evaluation is confirmed by computer simulation. Manuscript profile