1. Associate Professor, Dept. of Architecture and Civil Engineering, City Univ. of Hong Kong, Tat Chee Ave., Kowloon Tong, Hong Kong (corresponding author).
2. Ph.D. Candidate, Dept. of Architecture and Civil Engineering, City Univ. of Hong Kong, Tat Chee Ave., Kowloon Tong, Hong Kong.
3. Professor, Faculty of Environment and Technology, Univ. of the West of England, Frenchay Campus, Coldharbour Ln., Bristol BS16 1QY, U.K.