1. Associate Professor, State Key Laboratory of Coastal and Offshore Engineering, Dalian Univ. of Technology, No. 2, Linggong Rd., Ganjingzi District, Dalian 116024, China (corresponding author).
2. Professor, Division of Engineering and Policy for Sustainable Environment, Faculty of Engineering, Hokkaido Univ., Kita-ku, Kita 13, Nishi 8, Sapporo 060-8628, Japan.