1. Department of Electrical and Computer Engineering of the Faculty of Science and Technology, University of Macau, Taipa, China
2. Department of Automation, Shanghai Jiao Tong University, Shanghai, China
3. Institute for Systems and Robotics, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
4. Department of Electrical and Computer Engineering of the Faculty of Science and Technology, University of Macau, Taipa, Macao