1. School of Transportation and Logistics, Dalian University of Technology, No. 2 Linggong Rd., Ganjingzi District, Dalian 116024, China
2. School of Transportation and Logistics, Dalian University of Technology, No. 2 Linggong Rd., Ganjingzi District, Dalian 116024, China (Corresponding author), e-mail: panbf@dlut.edu.cn, https://orcid.org/0000-0002-6339-7442