1. College of Economics and Management, Shangqiu Normal University, Shangqiu, China
2. College of Information Science and Engineering, Liaoning Petrochemical University, Fushun, China
3. Department of Computer Science and Software Engineering, Monmouth University, West Long Branch, NJ, USA
4. College of Information Science and Engineering, Northeastern University, Shenyang, China
5. Information and Control Engineering College, Liaoning Petrochemical University, Fushun, China
6. Department of Computer Science and Technology, Shandong University of Science and Technology, Qingdao, China