1. School of Mechanical and Electrical Engineering, Zhongshan Institute, University of Electronic Science and Technology of China, Zhongshan, China
2. School of Automation, Guangdong University of Technology, Guangzhou, China
3. School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu, China
4. Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, Milan, Italy