1. SHU-UTS SILC Business School, Shanghai University, Shanghai 201800, P. R. China
2. College of Surveying and Geo-Informatics, Shandong Jianzhu University, Jinan 250101, P. R. China
3. School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, P. R. China
4. Shanghai Key Laboratory of Rail, Infrastructure Durability and System Safety, Shanghai 201804, P. R. China
5. Jinan City Planning and Design Institute, Jinan High-Tech Industrial Development Zone 250101, P. R. China