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arXiv 1609.07951math.PR
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有限维和无限维恒化器模型的高斯近似

Gaussian approximations for chemostat models in finite and infinite dimensions

Bertrand Cloez, Coralie Fritsch

摘要:

在恒化器中,细菌生活在恒定体积的生长容器中,其中液体被连续注入。最近,Campillo和Fritsch引入了一个基于个体的质量结构模型来表示这种动力学,并证明了它收敛于一个更经典的偏微分方程。在这项工作中,我们感兴趣的波动过程的收敛性。在索伯列夫空间中考虑这一过程,并利用希尔伯特空间上的中心极限定理证明了其收敛于无穷维高斯过程,从而得到了Crump-Young模型的一个二维高斯逼近,这一模型的长时间行为是相对误解的.对于这种近似,我们导出了不变分布及其收敛性,并给出了数值模拟来说明我们的结果。

英文摘要:

In a chemostat, bacteria live in a growth container of constant volume in which liquid is injected continuously. Recently, Campillo and Fritsch introduced a mass-structured individual-based model to represent this dynamics and proved its convergence to a more classic partial differential equation. In this work, we are interested in the convergence of the fluctuation process. We consider this process in some Sobolev spaces and use central limit theorems on Hilbert space to prove its convergence in law to an infinite-dimensional Gaussian process.As a consequence, we obtain a two-dimensional Gaussian approximation of the Crump-Young model for which the long time behavior is relatively misunderstood. For this approximation, we derive the invariant distribution and the convergence to it. We also present numerical simulations illustrating our results.

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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