1. School of Computer Science and Technology, Zhoukou Normal University, Zhoukou, Henan, China
2. Online Teaching Center, Zhengzhou College of Finance and Economics, Zhengzhou, Henan, China
3. Department of Computer Science and Technology, Lvliang University, Lvliang, Shanxi, China
4. School of Software, Chongqing Finance and Economics College, Chongqing, China
5. School of Microelectronics and Communication Engineering, Chongqing University, Chongqing, China