1. State Key Lab. of CAD&CG, Zhejiang University, Hangzhou, People’s Republic of China
2. ZJU-UIUC Institute, Zhejiang University, Haining, People’s Republic of China
3. School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan, People’s Republic of China
4. College of Engineering and Design, Lishui University, Lishui, People’s Republic of China