1. School of Electrical Engineering, Southwest Jiaotong University, Chengdu, Sichuan, China
2. School of Information Engineering, Southwest University of Science and Technology, Mianyang, Sichuan, China
3. Centre for Computational Intelligence, School of Computer Science and Informatics, De Montfort University, England, UK
4. Department of Mathematical Information Technology, University of Jyväskylä, Agora, Jyväskylä
5. Control Engineering College, Chengdu University of Information Technology, Chengdu, Sichuan, China
6. Faculty of Engineering and Informatics, University of Bradford, Bradford, West Yorkshire, UK
7. Faculty of Mathematics and Computer Science, University of Bucharest, Bucharest, Romania