1. College of Control Science and Engineering, Bohai University, Jinzhou, People's Republic of China
2. College of Information Science and Technology, Bohai University, Jinzhou, People's Republic of China
3. School of Information Science and Engineering, Shandong Normal University, Jinan, People's Republic of China
4. Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian, Liaoning, People's Republic of China