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arXiv 0801.4365q-bio.PE
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一类Holling型IV捕食者-食饵模型的复杂动力学

Complex dynamics of a Holling-type IV predator-prey model

Lei Zhang, Weiming Wang, Yakui Xue, Zhen Jin

摘要:

本文研究了一类含有扩散、噪声(随机波动)和周期外力的Holling IV型捕食-食饵模型。通过简单的稳定性分析和分岔分析,得到了空间域上的Hopf分岔和Turing分岔曲面,并给出了空间域上的Hopf分岔和Turing分岔的符号条件。在稳定性和分岔分析的基础上,通过数值模拟得到了螺旋斑图的形成过程。此外,我们还研究了具有色噪声和外部周期强迫的模型。从数值结果可以看出,噪声或外部周期性强迫可以诱导不稳定性,增强物种的振荡和共振响应。我们的研究结果表明,模拟反应扩散方程是一个合适的工具,调查复杂的时空动力学的基本机制。

英文摘要:

In this paper, we focus on a spatial Holling-type IV predator-prey model which contains some important factors, such as diffusion, noise (random fluctuations) and external periodic forcing. By a brief stability and bifurcation analysis, we arrive at the Hopf and Turing bifurcation surface and derive the symbolic conditions for Hopf and Turing bifurcation in the spatial domain. Based on the stability and bifurcation analysis, we obtain spiral pattern formation via numerical simulation. Additionally, we study the model with colored noise and external periodic forcing. From the numerical results, we know that noise or external periodic forcing can induce instability and enhance the oscillation of the species, and resonant response. Our results show that modeling by reaction-diffusion equations is an appropriate tool for investigating fundamental mechanisms of complex spatiotemporal dynamics.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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