فهرس المقالات Leila Jafar Tafreshi المقاله 1 - Preserving Data Clustering with Expectation Maximization Algorithm 10.7508/jist.2016.03.004 Leila Jafar Tafreshi Farzin Yaghmaee Journal of Information Systems and Telecommunication (JIST) , العدد 3 , السنة 4 , تابستان 2016