1. School of Automation, Wuhan University of Technology, Wuhan, P.R. China
2. Department of Mathematics, Huzhou University, Huzhou, P.R. China
3. Hunan Provincial Key Laboratory of Mathematical Modeling and Analysis in Engineering, Changsha University of Science & Technology, Changsha, P.R. China
4. Department of Mathematics, COMSATS University Islamabad, Lahore, Pakistan
5. Faculty of Education, Van Yuzuncu Yil University, Van, Turkey