1. School of Automation, Guangdong University of Technology, Guangzhou 510006, China
2. School of Electronics and Information, Guangdong Polytechnic Normal University, Guangzhou 510006, China
3. MOE Key Laboratory of Intelligent Manufacturing, Shantou University, Shantou 515063, China
4. College of Computing, University of Electronic Science and Technology of China, Zhongshan Institute, Zhongshan 528402, China