1. Lecturer, Dept. of Civil Engineering, Henan Univ. of Urban Construction, Henan 467001, China; Spatial Structure Research Center, Beijing Univ. of Technology, Beijing 100124, China.
2. Professor, Spatial Structure Research Center, Beijing Univ. of Technology, Beijing 100124, China; Professor, Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education, Beijing Univ. of Technology, Beijing 100124, China.
3. Lecturer, Dept. of Civil Engineering, School of Mathematics, Computer Science and Engineering, Northampton Square, London EC1V 0HB, U.K.; Chanbai Mountain Distinguished Visiting Professor, Dept. of Civil Engineering, Jilin Jianzhu Univ., Changchun, Jilin, China (corresponding author).
4. Associate Professor, Spatial Structure Research Center, Beijing Univ. of Technology, Beijing 100124, China; Professor, Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education, Beijing Univ. of Technology, Beijing 100124, China.