1. Machine Life and Intelligence Research Center, Guangzhou University, Guangzhou 510006, China, and also with the Computational Intelligence Laboratory, School of Computer Science, University of Lincoln, Lincoln LN6 7TS, U.K..
2. School of Electrical Engineering, Guangxi University, Nanning 530004, China, and also with the Computational Intelligence Laboratory, School of Computer Science, University of Lincoln, Lincoln LN6 7TS, U.K.
3. Northwest Institute of Mechanical and Electrical Engineering, Xianyang 712099, China, and also with the Computational Intelligence Laboratory, School of Computer Science, University of Lincoln, Lincoln LN6 7TS, U.K.
4. School of Mathematics and Information Science, Guangzhou University, Guangzhou 510006, China