1. School of Automation, Nanjing University of Science and Technology, Nanjing, People's Republic of China
2. School of Information and Control Engineering, Qingdao University of Technology, Qingdao, People's Republic of China
3. School of Mathematics and Statistics, Heze University, Heze, People's Republic of China
4. School of Electrical Engineering and Automation, Anhui University, Hefei, People's Republic of China