1. State Key Laboratory of Rail Traffic Control and Safety (Beijing Jiaotong University), China and School of Electronics and Information Engineering, Beijing Jiaotong University 100044, Beijing, China.
2. State Key Laboratory of Rail Traffic Control and Safety (Beijing Jiaotong University), China and Shanghai Key Lab of Intelligent Information Processing and Department of Computer Science and Engineering, Fudan University, 200433, Shanghai, China.
3. School of Traffic and Transportation, Beijing Jiaotong University, 100044, Beijing, China.