1. School of Electrical Engineering and State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing 400044, China
2. Institution of Microelectronics, Tsinghua University, Beijing 100084, China
3. School of Automation and Electrical Engineering, University of Science and Technology Beijing, Beijing 100083, China
4. School of Aerospace Engineering, Tsinghua University, Beijing 100084, China
5. Heart-forever (Beijing) Technology Co., Ltd, Beijing 100085, China