1. Institute for Pattern Recognition and Artificial Intelligence, School of Automation, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
2. School of Mechanical Engineering and Automation, Wuhan University of Textile, Wuhan, Hubei 430073, China
3. Department of Mechanical and Electrical Engineering, Xiamen University, Xiamen, Fujian 361005, China