1. Assistant Professor, School of Management Science and Engineering, Central Univ. of Finance and Economics, 39 Xue Yuan South Rd., Beijing 100081, China. ORCID:
2. Associate Professor, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, 205 N. Mathews Ave., Urbana, IL 61801 (corresponding author).