1. School of Electrical Engineering and Automation Hefei University of Technology Hefei China
2. School of Electrical and Electronic Engineering Korea University Seoul Republic of Korea
3. School of Information and Software Engineering University of Electronic Science and Technology of China Chengdu China
4. School of Information Science and Engineering Chengdu University Chengdu China
5. College of Mathematics and Statistics Guangxi Normal University Guilin China
6. School of Automation Engineering University of Electronic Science and Technology of China Chengdu China