1. School of Electrical Engineering, Southwest Jiaotong University, Chengdu, China
2. Department of Electrical and Computer Engineering, State Key Laboratory of Internet of Things for Smart City (UM), University of Macau, Macau, China
3. Department of Electrical and Electronic Engineering and the Research Institute of Smart Energy, The Hong Kong Polytechnic University, Hong Kong, SAR, China
4. Department of Electrical and Computer Engineering, University of Alberta, Edmonton, AB, Canada