1. School of Mathematics and Statistics, Anyang Normal University, Anyang 455000, China
2. Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian 116024, China
3. Informedia Electronic Co., Ltd, Dalian University of Technology, Dalian 116024, China
4. College of Mathematics and Computer Science, Zhejiang Normal University, Jinhua 321000, China
5. Institution of Information Management and Information system, Dalian University of Technology, Dalian 116024, China