1. School of Mechanical Engineering, Southwest Jiaotong University, Chengdu, R.P. China
2. Technology and Equipment of Rail Transit Operation and Maintenance Key Laboratory of Sichuan Province, Chengdu, R.P. China
3. School of Economics and Management, Beihang University, Beijing, R.P. China
4. School of Mechanical Engineering, Shanghai Jiao Tong University, Minhang District, Shanghai, R.P. China
5. NUS Business School and The Logistics Institute-Asia Pacific, National University of Singapore, Singapore