1. State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong University Xi'an Shaanxi 710049 China
2. Department of Materials Science and Engineering University of California Los Angeles CA 90095 USA
3. School of Electrical Engineering Xi'an Jiaotong University Xi'an Shaanxi 710049 China
4. School of Mechanical Engineering Southeast University Nanjing Jiangsu 211189 China
5. Department of Mechanical and Aerospace Engineering University of California Los Angeles CA 90095 USA
6. College of Intelligence and Computing Tianjin University Tianjin Tianjin 300072 China