1. Chongqing High Tech Branch of Zhongjihua Engineering Management Group Co., Ltd., Chongqing, China.
2. School of Civil Engineering, Chongqing Jiaotong Univ., Chongqing, China.
3. Professor, Dept. of Road and Urban Railway Engineering, Beijing Univ. of Technology, Beijing, China.
4. Chongqing Municipal Government Housing Management Office, Chongqing, China.