1. Faculty of Science, Yibin University, Yibin 644000, Sichuan, P. R. China
2. Key Laboratory of Computational Physics of Sichuan Province, Yibin University, Yibin 644000, P. R. China
3. Department of Bionano Engineering, Hanyang University, Ansan 155-88, South Korea
4. Department of Mathematics College of Science and Arts in Dariyah Qassim University, Saudi Arabia