1. Shangqiu Normal University, Shangqiu, China
2. Monmouth University, West Long Branch, NJ, USA
3. Shandong University of Science and Technology, Qingdao, China
4. College of Computer and Communication Engineering, Liaoning Petrochemical University, Fushun, China
5. College of Computer Technology, Liaoning Petrochemical University, Fushun, China