School of Mathematics and Information Science, Neijiang Normal University, Neijiang 641112, Sichuan, China;
Intelligent Control Development Center, Southwest Jiaotong University, Chengdu 610031, China;
School of Computing and Mathematics, University of Ulster, Northern Ireland BT370QB, UK;
School of Computing and Mathematics, University of Ulster, Northern Ireland BT370QB, UK;
Intelligent Control Development Center, Southwest Jiaotong University, Chengdu 610031, China;
