1. School of Biological Science and Medical Engineering, Beihang University, Beijing, China
2. Beijing Advanced Innovation Centre for Biomedical Engineering, Beihang University, Beijing, China
3. State Key Laboratory of Virtual Reality Technology and Systems, School of Computer Science and Engineering, Beihang University, Beijing, China
4. Patent Examination Cooperation Sichuan Center of the Patent Office, CNIPA, Chengdu City, Sichuan Province, China