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基于比率的三种群混合模型周期解的存在性

Existence of Periodic Solutions for Three Specits of Ratio-dependent Mixed Model
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摘要 研究三物种之间既有基于比率的捕食关系又有食饵之间的合作关系的混合模型,其中捕食者具有Michaelis-Menten型功能反映函数.通过对系统的解进行先验估计,利用重合度理论中的延拓定理对模型的周期解问题进行了研究,给出了该模型正周期解存在的一些充分条件. In this paper, the mixed model with predator- ness and cooperation of three species is discussed, and the sufficient conditions for the existence of periodic solution are obtained by the means of coincidence degree.
作者 张丽 戴斌祥
出处 《长沙大学学报》 2006年第2期1-4,共4页 Journal of Changsha University
基金 国家自然科学基金(批准号:10471153)项目资助
关键词 基于比率 混合模型 周期解 ratio- dependent mixed model periodic solution
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