1. Institute of Marine Science and Technology, Shandong University, Qingdao, China
2. State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou, China
3. School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing, China
4. State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai, China