1. College of Mechanics and Materials, Hohai University, Nanjing, People's Republic of China
2. Center of Excellence for Ocean Engineering, Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, Taiwan
3. Institute of Applied Mathematics, Shandong University of Technology, Zibo, People's Republic of China
4. School of Electromechanic Engineering, Qingdao University, Qingdao, People's Republic of China