1. State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, Sichuan, People’s Republic of China
2. School of Engineering, University of Birmingham, Edgbaston, Birmingham, UK
3. China Railway Shanghai Design Institute Group Co., Ltd., Shanghai, People’s Republic of China
4. Key Laboratory of Traffic Safety on Track, Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha, Hunan, People’s Republic of China