1. M.Sc. Student, Hunan Univ., Changsha, Hunan Province 410082, China; presently, Research Assistant, Dept. of Architecture and Civil Engineering, City Univ. of Hong Kong, Hong Kong SAR, China.
2. Associate Professor, Dept. of Architecture and Civil Engineering, City Univ. of Hong Kong, Hong Kong SAR, China (corresponding author).
3. Professor, Hunan Univ., Changsha, Hunan Province 410082, China.