1. Liaoning Petrochemical University,College of Computer and Communication Engineering,Fushun,China,113001
2. Northeastern University,College of Information Science and Engineering,Shenyang,China,110819
3. Shandong University of Science and Technology,Department of Computer Intelligent Sci. & Tech.,Qingdao,China,266590
4. Shangqiu Normal University,College of Economics and Management,Shangqiu,China,476000
5. Electrical and Computer Engineering at Rowan University,Glassboro,New Jersey,USA