1. School of Automation, Guangdong University of TechnologyGuangzhou510006People's Republic of China
2. Department of Applied MathematicsGuangdong University of Foreign StudiesGuangzhou510006People's Republic of China
3. The Automation and Robotics Research Institute, University of Texas at ArlingtonArlingtonTX76118USA
4. Qian Ren Consulting Professor, State Key Laboratory of Synthetical Automation for Process Industries, Northeastern UniversityShenyangPeople's Republic of China