1. College of Science, Henan University of TechnologyZhengzhou450001People's Republic of China
2. School of Electrical and Electronic Engineering, The University of AdelaideSA5005Australia
3. College of Engineering and Science, Victoria UniversityMelbourneVIC8001Australia
4. Department of Electrical and Computer EngineeringUniversity of AucklandPrivate Bag 92019Auckland1142New Zealand
5. School of Automation, Chongqing UniversityChongqing400044People's Republic of China