1. Ph.D. Candidate, Dept. of Transportation Management, Dalian Maritime Univ., Dalian 116026, China.
2. Professor, Dept. of Transportation Management, Dalian Maritime Univ., Dalian 116026, China; Chief Engineer, Dalian Airport Construction and Development Company, Ltd., Airport Apt., No. 102 Bldg., Yingke Rd., Ganjingzi District, Dalian 116000, China (corresponding author).
3. Assistant Researcher, Dept. of Transportation Management, Dalian Maritime Univ., Dalian 116026, China.