本文讨论一类具有脉冲效应和周期系数的两个食饵一个捕食者的捕食-食饵系统的动力学行为。
In this paper, a classical periodic two prey and a predator predator-prey system with impulsive effect is investigated.
该系统是由一个捕食者，二个食饵种群所构成。
The system has three species, where two prey and one predator.
研究了一类具有时滞的基于比率型三种群捕食者-食饵系统，给出了系统持续生存的条件。
A three-species ratio-dependent predator-prey model with time delays is investigated, conditions are given for persistence of the system.
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