1. Key Laboratory of Pattern Recognition and Intelligent Information Processing, Institutions of Higher Education of Sichuan Province, Chengdu University, Chengdu 610106, China
2. Department of Mathematics, COMSATS Institute of Information Technology, Attock Campus, Islamabad, Pakistan
3. Punjab College of Commerce and Science, Attock Campus, Lahore, Pakistan
4. Department of Applied Mathematics, Iran University of Science and Technology (IUST) Narmak, 16844 Tehran, Iran