1. Assistant Professor, Dept. of Building, School of Design and Environment, National Univ. of Singapore, Singapore 127566.
2. Associate Professor, School of Economics and Management, Tongji Univ., 1239 Siping Rd., Shanghai 200092, China (corresponding author).
3. Professor, Dept. of Civil and Environmental Engineering, Univ. of Maryland, College Park, MD 20742; and Polish Academy of Sciences Institute of Theoretical and Applied Informatics, Gliwice, Poland.
4. Graduate Research Assistant, School of Economics and Management, Tongji Univ., Shanghai 200092, China.
5. Professor and Dean, Dept. of Construction Management and Real Estate, School of Economics and Management, Tongji Univ., Shanghai 200092, China.