1. Ministry of Education Key Laboratory of Autonomous Systems and Networked Control and GuangDong Engineering Technology Research Center of Control of Intelligent Systems, College of Automation Science and Engineering, South China University of Technology, Guangzhou, China
2. the Technical Aspects of Multimodal Systems (TAMS) group, Department of Informatics, Universität Hamburg, Hamburg, Germany
3. State Key Laboratory of Management and Control for Complex Systems, Institute of Automation, Chinese Academy of Sciences, Beijing, China