Corresponding Author: Hongxia Zhang*, the corresponding author, email: hx_orchid@126. com. She received her M.S. degree in computer applications technology from China University of Petroleum in 2006. She received the Ph.D degree in computer science and technology from Beijing University of Post and Telecommunication in 2013. She is currently a lecture in China University of Petroleum. Her research interests include service computing, cloud computing, and software engineering.;Fei Wang, is currently a Ph.D. candidate at China University of Petroleum, Qingdao, China. He received M.S. degree in cryptology from Beijing University of Post and Telecommunication in 2007. His research interests include cloud computing, management science and engineering.;Yang Zhang, received his B.S. and M.S. degree in communication engineering from China University of Petroleum in 2003. He received his PhD degree in communication and information systems from Beijing university of Post and Telecommunication in 2014. He is currently a lecturer in China University of Petroleum. His current interests include wireless communications, signal processing, cognitive radios.;Jiuyun Xu, received the Ph.D. degree in Computer Science from Beijing University of Posts and Telecommunications in 2004. He is now a Professor of China University of Petroleum. His research interests include service computing, cloud computing and feature interaction.