1. School of Traffic and Transportation Engineering, Central South University , Changsha 410075 , Hunan, China
2. Smart Transport Key Laboratory of Hunan Province, Central South University , Changsha 410075 , Hunan, China
3. Key Laboratory of Traffic Safety on Track of Ministry of Education, Central South University , Changsha 410075 , Hunan, China
4. Joint International Research Laboratory of Key Technology for Rail Traffic Safety , Central South University, Changsha 410075, Hunan, China