1. Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education, Anhui University, Hefei, China
2. Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education, School of Artificial Intelligence, Anhui University, Hefei, China
3. Department of Engineering, King's College London, London, U.K.
4. Anhui Engineering Laboratory of Human Robot Integration System and Intelligent Equipment, School of Electrical Engineering and Automation, Anhui University, Hefei, China
5. School of Mechatronic Engineering and Automation, Shanghai University, Shanghai, China