1. School of Computer Science and Technology, Nanyang Normal University, Nanyang, Henan 473061, China
2. Nanyang Normal University, Nanyang, Henan 473061, China
3. School of Mathematics and Statistics, Hubei University of Arts and Science, Xiangyang, Hubei 441053, China
4. Hubei Key Laboratory of Power System Design and Test for Electrical Vehicle, Hubei University of Arts and Science, Xiangyang, Hubei 441053, China