1. Professor, Research Center for Wind Engineering, School of Civil Engineering, Southwest Jiaotong Univ., Chengdu 610031, China (corresponding author).
2. Professor, Dept. of Statistics, School of Mathematics, Southwest Jiaotong Univ., Chengdu 610031, China.
3. Professor, Dept. of Civil and Environmental Engineering, Hong Kong Polytechnic Univ., Hong Kong, China.
4. Professor, Research Center for Wind Engineering, School of Civil Engineering, Southwest Jiaotong Univ., Chengdu 610031, China.