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时滞种群模型正周期解的存在性及全局吸引性

Existence of Positive Periodic Solution and Global Attractivity for Delay Population Model
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摘要 建立了对数种群模型N'(t)=N(t){r(t)-a1(t)In[N(t)]-a2(t)In[N(t-r(t))]}的正周期解的存在性及吸引所有正解的充分条件,通过构造函数f(x)=x+e^a/x(0〈x≤1),研究了时滞种群模型的正周期解对所有正解的吸引性,改进了相关文献中的结论. The sufficient conditions for the existence of a positive periodic solution and its global attractiveness for logarithmic population modelN'(t)=N(t){r(t)-a1(t)In[N(t)]-a2(t)In[N(t-r(t))]}are established,by constructuring function f(x)=x+e^a/x(0〈x≤1),we studied the attractiveness of a positive periodic solution of a delay population model for all positive solution, the results of the related literatures are improved.
出处 《北华大学学报(自然科学版)》 CAS 2008年第5期397-402,共6页 Journal of Beihua University(Natural Science)
基金 国家自然科学基金资助项目(10471153)
关键词 时滞种群模型 正周期解 全局吸引性 Delay population model Positive periodic solution Global attractiveness
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参考文献16

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