| Affiliation: | 1. School of Science and Technology, University of New England, Armidale, NSW 2351, Australia;2. Departamento de Matemáticas, Universidad Autónoma de Madrid, 28049 Madrid, Spain;1. Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), School of Mathematics and Statistics, Southwest University, Chongqing 400715, China;2. Complex Systems Research Center, Shanxi University, Taiyuan 030006, China;3. Shanxi Key Laboratory of Mathematical Techniques and Big Data Analysis on Disease Control and Prevention, Shanxi University, Taiyuan 030006, China |
