1. Faculty of Science, Yibin University, Yibin, 644000 Sichuan, P. R. China
2. Department of Bionano Engineering, Hanyang University, Ansan 155-88, South Korea
3. Department of Mathematics and Statistics, Nanjing University of Information Science and Technology, Nanjing, P. R. China
4. Department of Basic Sciences, College of Science and Theoretical Studies, Dammam Branch, Saudi Electronic University, Riyadh, Saudi Arabia
5. Center of Research, Faculty of Engineering, Future University in Egypt, New Cairo, Egypt
6. Department of Mathematics, College of Science Al-Zulfi, Majmaah University, Al Majmaah, 11952, Saudi Arabia