1. School of Data Science and Technology, North University of China, Taiyuan 030051, China.
2. School of Mathematics, Hangzhou Normal University, Hangzhou 311121, China.
3. Corresponding author. Complex Systems Research Center, Shanxi University, Taiyuan 030006, China; Shanxi Key Laboratory of Mathematical Technique and Big Data Analysis on Disease Control and Prevention, Shanxi University, Taiyuan 030006, China.