1. Department of Mathematics and Information Sciences, North China University of Water Resources and Electric Power, Zhengzhou 450011, China
2. Henan Mechanical and Electrical Vocational College, Zhengzhou 451191, China
3. The Second Artillery Command College, Wuhan 430012, China
4. Institute for Computational Materials Science, School of Physics and Electronics, Henan University, Kaifeng 475004, China
5. Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China