1. School of Electronics and Information Engineering, Tongji University, Shanghai, China
2. College of Engineering, City University of Hong Kong, Kowloon, Hong Kong
3. State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, China
4. Grado Department of Industrial and Systems Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
5. School of Data Science, City University of Hong Kong, Kowloon, Hong Kong