1. School of Mechatronic Engineering and Automation and the School of Future Technology (Institute of Artificial Intelligence), Shanghai University, Shanghai, China
2. School of Future Technology (Institute of Artificial Intelligence), Shanghai University, Shanghai, China
3. College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China
4. School of Engineering, University of Hull, Hull, U.K.