1. School of Electrical and Electronic Engineering, North China Electric Power University, Beijing, China
2. School of Control and Computer Engineering and the School of Electrical and Electronic Engineering, North China Electric Power University, Beijing, China
3. Department of Computer Science, University of Victoria, Victoria, BC, Canada
4. Key Laboratory of Medical Electronics and Digital Health of Zhejiang Province and the Engineering Research Center of Intelligent Human Health Situation Awareness of Zhejiang Province, Jiaxing University, Jiaxing, China