1. School of Transportation Science and Engineering, Beihang University, Beijing, People’s Republic of China
2. Technical Department, CRRC Academy Co., Ltd, Beijing, People’s Republic of China
3. School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing, People’s Republic of China
4. School of Information Engineering, Guangdong University of Technology, Guangzhou, People’s Republic of China
5. School of Computer Science and Engineering, Sun Yat-sen University, Guangzhou, People’s Republic of China