摘要
§1.引言对生态数学中的logistic模型以及Lotka-Volterra模型的研究已从常系数转向变系数,例如,[1-3]讨论了周期系数的情形,[4]讨论了概周期系数的情形。文[8]指出,当这些模型具有放牧率时,尚待研究。本文所讨论的是有周期放牧率的几种周期模型。§2讨论有放牧率的logistic模型,
In this paper, it is investigated that periodic logistic model and the Lotka-Voltcrra model both with grazing rates. The existence, uniqueness and staility of a positive periodic solution and the asymptotic behavior of nonpcriodic solutions are researched. In addition, it is pointed out that some results arc valid in higher dimensional systems.
出处
《生物数学学报》
CSCD
北大核心
1990年第1期80-89,共10页
Journal of Biomathematics
基金
国家科学基金
