1. Queen’s University,Faculty of Arts and Science,Kingston,Ontario,Canada,K7L 3N6
2. Chongqing University,Software Engineering Department,Chongqing,PRC
3. Xidian University,The School of Telecommunication Engineering,Shaanxi,PRC,710071
4. Zhejiang University of Finance & Economics,Computer Science Department,Hangzhou,PRC,310000
5. Southwest University,Software Engineering Department,Chongqing,China,400715