1. Key Laboratory of Electronic Materials and Devices of Tianjin, School of Electronics and Information Engineering, Hebei University of Technology, Tianjin 300401, China
2. State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Tianjin 300401, China
3. Tianjin Institute of Aerospace Mechanical and Electrical Equipment, 101 Shenzhou Road Binhai Innovation Park Binhai Hi-tech Industrial Development Area, 13888 JinHan Road, Tianjin, China