研究了一类具有垂直传染的脉冲免疫接种SIR模型,采用传染率βI(1+vI)S,得到了无病周期解,给出了此周期解的全局稳定性分析.并获得了系统一致持续生存的条件.
In this paper,an SIR epidemic disease model with vertical transmission and pulse vaccination is investigated.Used an incidence rate of the form βI(1+vI)S,an 'infection-free' periodic solution is obtained,and the analysis of global stability of the 'infection-free' periodic solution is given.Furthermore,the sufficient condition for permanence of the system is obtained.