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Stability, Hopf bifurcations and spatial patterns in a delayed diffusive predator-prey model with herd behavior

机译:一类具有种群行为的时滞扩散捕食模型的稳定性,Hopf分支和空间格局

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摘要

In this paper, we consider a delayed diffusive predator-prey model with herd behavior. Firstly, by choosing the appropriate bifurcation parameter, the stability of the positive equilibria and the existence of Hopf bifurcations, induced by diffusion and delay respectively, are investigated by analyzing the corresponding characteristic equation. Then, applying the normal form theory and the center manifold argument for partial functional differential equations, the formula determining the properties of the Hopf bifurcation are obtained. Furthermore, the instability of the Hopf bifurcation leads to the emergence of spatial patterns. Finally, some numerical simulations are also carried out to illustrate and expand the theoretical results. (C) 2015 Elsevier Inc. All rights reserved.
机译:在本文中,我们考虑具有种群行为的时滞扩散食饵-捕食者模型。首先,通过选择适当的分岔参数,通过分析相应的特征方程,研究了正平衡的稳定性和分别由扩散和延迟引起的Hopf分岔的存在。然后,将正规函数形式的理论和中心流形参数应用到偏泛函微分方程中,得出确定Hopf分支性质的公式。此外,霍普夫分支的不稳定性导致空间模式的出现。最后,还进行了一些数值模拟,以说明和扩展理论结果。 (C)2015 Elsevier Inc.保留所有权利。

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