1. Professor, College of Aerospace Engineering, Nanjing Univ. of Aeronautics and Astronautics, Nanjing, 210016, China. E-mail: lzhou@nuaa.edu.cn
2. Postgraduate, College of Aerospace Engineering, Nanjing Univ. of Aeronautics and Astronautics, Nanjing, 210016, China. E-mail: shinya@nuaa.edu.cn
3. Professor, Dept. of Civil & Environmental Engineering, Univ. of California, Irvine, CA 92697 (corresponding author). E-mail: jnyang@uci.edu and yang@ntu.edu.tw