1. Division of Dynamics and Control, School of Mathematics and Statistics, Shandong University of Technology, Zibo 255000, China
2. Beijing Electro-Mechanical Engineering Institute, Beijing 100074, China
3. Department of Applied Mathematics and Statistics, Technical University of Cartagena, Hospital de Marina, Cartagena 30203, Spain
4. Department of Mathematics, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah 21589, Saudi Arabia