讨论了传染病的发生率为饱和接触率和捕食者的功能反应函数为Holling-Ⅱ类的阶段时滞结构的生态-传染病(害虫-病虫-天敌)模型,利用人工脉冲,周期投放有病的害虫和天敌去治理害虫.通过Floquet乘子理论,证明了当周期投放量达到一个临界点时,害虫将灭绝;并进一步获得了系统持续生存的条件.
Analyzes a stage structure delayed eco-epidemiology (pest-infected pest-natural enemy) model with saturated contact rate and Holling- Ⅱ functional response. It constructs a pest control strategy by impulsively periodically releasing the infected pests and the natural predators. By using the Floquet theory, it first proves that pest population is completely eradicated when the periodic releasing amounts is larger than some critical values. Then the conditions in which the system is permanent is given.