1. Department of Automation Science and Electrical Engineering, Beihang University, Beijing, China
2. School of Engineering Medicine, Beihang University, Beijing, China
3. School of Medical Technology, Beijing Institute of Technology, Beijing, China
4. College of Computer Science and Artificial Intelligence, Wenzhou University, Wenzhou, China
5. Department of Automation Science and Electrical Engineering and State Key Laboratory of Virtual Reality Technology and Systems, Beihang University, Beijing, China