【摘要】 研究一类非自治的具有时滞和基于比率且有Beddington-DeAngelis功能性反应的两种群捕食者-食饵周期系统,利用Mawhin重合度理论建立了这类系统的正周期解存在的一个充分性判据.更多还原

【Abstract】 In this paper,a class of predator-prey system with delayed and ratio-dependent is studied.By using the continuation theorem based on coincidence degree theory,establishes the existence result of positive periodic solution for the periodic predator-prey system with Beddington-DeAngelis functional response.A sufficient condition is derived about it.更多还原