1. College of Electrical Engineering and Control Science, Nanjing Tech University, Nanjing, China
2. School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing, China
3. School of Mathematical Sciences, China University of Mining and Technology, Xuzhou, China
4. School of Control Science and Engineering, Tiangong University, Tianjin, China
5. Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian, China