1. School of Statistics and Applied Mathematics, Anhui University of Finance and Economics, Bengbu, China;
2. School of Mathematics and Physics, Anhui Jianzhu University, Hefei, China;
3. Department of Mathematics, Comsats Institute of Information Technology, Sahiwal, Pakistan;
4. Department of Mathematics, Division of Science and Technology, University of Education Lahore, Lahore, Pakistan;
5. School of Electronic Engineering, Huainan Normal University, Huainan, China