1. Postdoctoral Research Fellow, International Institute for Urban Systems Engineering, Southeast Univ., Nanjing Jiangsu 210096, China (corresponding author)
2. Professor, Dept. of Mechanical Engineering, California Polytechnic State Univ., San Luis Obispo, CA 93407; Affiliated Professor, International Institute for Urban Systems Engineering, Southeast Univ., Nanjing Jiangsu 210096, China.
3. Professor, School of Civil Engineering and Architecture, Changsha Univ. of Science and Technology, Changsha Hunan 410114, China.