1. Professor, School of Urban Rail Transportation, Soochow Univ., Suzhou 215131, China.
2. Assistant Professor, School of Urban Rail Transportation, Soochow Univ., Suzhou 215131, China (corresponding author). ORCID: .
3. Chief Engineer, No. 1 Branch Office, China Railway 18th Bureau Group Co. Ltd., East Liulin Rd., Tianjing 300202, China.
4. School of Urban Rail Transportation, Soochow Univ., Suzhou 215131, China.