研究了一类具有外源和内部感染的捕食-食饵模型在Neumann边界条件下的共存态问题.首先利用特征值理论证明了该模型正常数平衡解的渐近稳定性;然后,给出了正平衡解的先验估计;最后利用度理论研究了非常数正平衡解的存在性.
The coexistence of a predator-prey model with disease infected by contact and external source is investigated.First,the stability of the positive constant steady state solution is proved by the eigenvalue theory.Second,a priori estimate of positive steady state solutions is given.Finally,the existence of non-constant positive steady state solutions is studied using degree theory.