1. College
of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, 29 Yudao Street, Nanjing 210016, PR China
2. Suzhou Kangli Orthopedics Instrument Co. Ltd., Luyuan Tangqiao Town, Zhangjiagang
Suzhou, 215600, PR China
3. Department
of Engineering and Design, University of Sussex, Sussex House, Brighton BN1 9RH, United Kingdom