Sloppy-model universality class and the Vandermonde matrix.

Sloppy-model universality class and the Vandermonde matrix.
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草率模型普遍性类和范德蒙德矩阵。

DOI:
10.1103/physrevlett.97.150601
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发表时间:
2006
影响因子:
8.6
通讯作者:
Sethna,JamesP
Sethna,JamesP
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
Waterfall,JoshuaJ;Casey,FergalP;Gutenkunst,RyanN;Brown,KevinS;Myers,ChristopherR;Brouwer,PietW;Elser,Veit;Sethna,JamesP

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在各种背景下,物理学家研究具有许多未知或可调参数的复杂非线性模型来解释实验数据。我们解释了为什么这样的系统经常aresloppy:系统的行为只取决于一些“僵硬”的参数组合,是不变的,因为其他“草率”的参数组合变化的数量级。我们观察到,草率的模型的灵敏度的特征值谱有一个惊人的,特征的形式与密度的特征值,这是大致恒定在一个大的范围内。我们认为,草率的模型的共同特征表明,它们可能属于一个共同的普适性类。特别是,我们激励集中在一个范德蒙合奏的多参数非线性模型,并显示在一个限制,他们表现出草率的模型的普遍特征。
In a variety of contexts, physicists study complex, nonlinear models with many unknown or tunable parameters to explain experimental data. We explain why such systems so often aresloppy: the system behavior depends only on a few “stiff” combinations of the parameters and is unchanged as other “sloppy” parameter combinations vary by orders of magnitude. We observe that the eigenvalue spectra for the sensitivity of sloppy models have a striking, characteristic form with a density of logarithms of eigenvalues which is roughly constant over a large range. We suggest that the common features of sloppy models indicate that they may belong to a common universality class. In particular, we motivate focusing on a Vandermonde ensemble of multiparameter nonlinear models and show in one limit that they exhibit the universal features of sloppy models.
多重指数和其他求和模型参数的可解性
DOI: --
发表时间: 1993
影响因子: 5.4
作者:
A. Bos;J. Swarte
通讯作者: J. Swarte