1. Big Data and Educational Statistics Application Laboratory, Guangdong University of Finance and Economics, Guangzhou 510320, P. R. China
2. Department of Applied Mathematics, Faculty of Mathematical Sciences, University of Tabriz, Tabriz, Iran
3. Natural Sciences Faculty, Lankaran State University, 50, H. Aslanov Street, Lankaran, Azerbaijan
4. Department of Physics, Payame Noor University, P.O. Box 19395-3697, Tehran, Iran
5. Department of Mathematics, Faculty of Education, Erciyes University, 38039 Melikgazi, Kayseri, Turkey