【摘要】 脉冲现象在自然界中广泛存在,在建立生态模型时引入脉冲效应能更真实、更准确地描述种群的变化规律.该文研究具有脉冲和Beddington-DeAngelis功能反应的捕食系统,运用重合度理论研究其周期解的存在性,得到了周期解存在的充分条件.更多还原

【Abstract】 As impulsive phenomena extensively exist in the nature,introduction of impulsive effect into an ecology model can lead to more accurate and reasonable description of the species and the ecological systems.This paper studies a predator-prey system with impulsive effects and Beddington-DeAngelis functional response.We investigate the existence of periodic solution by using the theory of coincidence degree.Sufficient conditions for the existence of periodic solution are obtained.更多还原