Variational approach to coarse-graining of generalized gradient flows

Variational approach to coarse-graining of generalized gradient flows
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广义梯度流粗粒度的变分方法

DOI:
10.1007/s00526-017-1186-9
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发表时间:
2015
影响因子:
2.1
通讯作者:
U. Sharma
U. Sharma
中科院分区:
数学2区
文献类型:
--
作者:
M. H. Duong;A. Lamacz;M. Peletier;U. Sharma

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在本文中,我们提出了一个变分技术,处理粗粒化和通过一个限制在一个统一的方式。该技术是基于一个对偶结构,这是目前在许多梯度流和其他变分演变,这往往是从一个大偏差原则。它有三个主要特点:(a)对偶结构和粗粒化之间的自然相互作用,(B)应用于具有非耗散效应的系统,以及(c)应用于粗粒化近似解,该近似解仅在一定误差下求解方程。作为例子,我们使用这种技术来解决三个极限问题,Vlasov-Fokker-Planck方程的过阻尼极限和随机扰动哈密顿系统的一个和多个自由度的小噪声极限。
In this paper we present a variational technique that handles coarse-graining and passing to a limit in a unified manner. The technique is based on a duality structure, which is present in many gradient flows and other variational evolutions, and which often arises from a large-deviations principle. It has three main features: (a) a natural interaction between the duality structure and the coarse-graining, (b) application to systems with non-dissipative effects, and (c) application to coarse-graining of approximate solutions which solve the equation only to some error. As examples, we use this technique to solve three limit problems, the overdamped limit of the Vlasov–Fokker–Planck equation and the small-noise limit of randomly perturbed Hamiltonian systems with one and with many degrees of freedom.
DOI: 10.1063/1.4726509
发表时间: 2012
影响因子: 1.3
作者:
Dirr N
通讯作者: Dirr N
DOI: 10.1007/s00220-014-1943-y
发表时间: 2012-10
影响因子: 2.4
作者:
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通讯作者: R. Kohn;Jianfeng Lu;B. Schweizer;M. Weinstein
DOI: 10.48550/arxiv.1201.4601
发表时间: 2012
期刊: --
影响因子: --
作者:
Adams S
通讯作者: Adams S
DOI: 10.1007/s00526-007-0119-4
发表时间: 2008-03
影响因子: 2.1
作者:
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通讯作者: A. Mielke;T. Roubíček;U. Stefanelli