一类具稀疏效应生态系统的极限环

Existence and Uniqueness of Limit Cycle about Ecosystem with Sparssing Effect

研究如下一类具稀疏效应的生态系统模型。 应用微分方程定性理论，对该系统的平衡点进行了分析，给出了极限环存在唯一性及不存在的参数范围．

This paper is devoted to study the following ecosystem model with sparssing Effect. By writing qualitative theory of ordinary diferential equations. we have analyzed the equilibrium points and obtained the parameter region of the existence, uniqueness and nonexistence of limit cycle of the above system.