arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1705.03320math.AP
收藏

一类非局部两种群交叉扩散模型的生态学

Zoology of a non-local cross-diffusion model for two species

J. A. Carrillo, Y. Huang, M. Schmidtchen

摘要:

研究了一类具有交叉扩散的非局部两种群交叉相互作用模型。基于文献[15]中介绍的数值方法,我们提出了一个保正的有限体积格式,并对这个新模型的长时间行为进行了数值研究。使用这样获得的见解,我们计算的情况下,吸引吸引/吸引排斥交叉相互作用的特定模型的解析定态和行进脉冲的解决方案。我们发现,作为交叉扩散的强度降低,有一个过渡从相邻的解决方案完全隔离的密度,我们计算的阈值分析吸引排斥交叉相互作用。在吸引吸引的情况下,与各种共存组件的支持的其他分叉定态进行了分析。我们发现在这些特定的情况下,其主要的定性特征也存在于更一般的潜力的数值和分析计算的稳态之间的强一致性。

英文摘要:

We study a non-local two species cross-interaction model with cross-diffusion. We propose a positivity preserving finite volume scheme based on the numerical method introduced in Ref. [15] and explore this new model numerically in terms of its long-time behaviours. Using the so gained insights, we compute analytical stationary states and travelling pulse solutions for a particular model in the case of attractive-attractive/attractive-repulsive cross-interactions. We show that, as the strength of the cross-diffusivity decreases, there is a transition from adjacent solutions to completely segregated densities, and we compute the threshold analytically for attractive-repulsive cross-interactions. Other bifurcating stationary states with various coexistence components of the support are analysed in the attractive-attractive case. We find a strong agreement between the numerically and the analytically computed steady states in these particular cases, whose main qualitative features are also present for more general potentials.

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。

↑