研究了一类具有生物和化学控制(周期释放天敌和喷洒杀虫剂)的两食饵-两捕食者模型的动力学性质.通过线性周期脉冲方程的Floquet理论和小幅扰动方法,证明当脉冲周期小于某个临界值时,存在一个全局渐近稳定的两个害虫根除周期解.
In this paper, the dynamic behaviors of a two - prey two - predator system with impulsive effect concerning biological control strategy - periodic releasing natural enemies and spraying pesticide at different time are investigated. By applying the Floquet theory of liner periodic impulsive equation and small amplitude perturbation method,we prove that there exists a globally asymptotically stable two- prey eradication periodic solution when the impulsive period is less than some critical value.