研究了一类具有非单调传染率的SEIRS时滞传染病模型的全局稳定性,通过分析对应的特征方程,证明了无病平衡点和地方病平衡点的局部稳定性.当基本再生数R0≤1和R0〉1时,通过构造不同的Lyapunov泛函分别证明了无病平衡点和地方病平衡点的全局渐近稳定性,同时对于文中主要结论给出了相应的数值模拟.
The paper presents a SEIRS epidemic model with non-monotone incidence rate and time delay describing a latent period. By analyzing the corresponding characteristic equations, the local stability of a disease-free equilibrium and an endemic equilibrium was established. When the basic reproduction number R0≤01, the global stability of the disease-flee equilibrium was proved. When the basic reproduction number R0〉1, by means of Lyapunov functional, sufficient conditions were obtained for the global asymptotic stability of the endemic equilibrium. Computer simulations were carried out to illustrate the main theory.