1. Ph.D. Candidate, School of Automation, Huazhong Univ. of Science and Technology, Wuhan 430074, China.
2. Professor, School of Management, Huazhong Univ. of Science and Technology, Wuhan 430074, China (corresponding author).
3. Professor, Dept. of Building and Real Estate, Hong Kong Polytechnic Univ., Kowloon 999077, Hong Kong.