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arXiv 2111.09220stat.MEnlin.CDphysics.data-an
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基于随机特征匹配的仿真推理的一个注记

A Note on Simulation-Based Inference by Matching Random Features

Cosma Rohilla Shalizi

摘要:

我们可以也应该通过调整模拟中的参数对模拟模型进行统计推断,以便模拟输出的{ \em随机选择}函数的值与根据数据计算的相同函数的值相匹配。非线性动力学中的“状态空间重构”或“时间序列的几何”文献的结果表明,仅$2d+1$这样的函数通常就足以识别具有$d$维参数空间的模型。来自机器学习中的“随机特征”文献的结果表明,使用数据的随机函数可以有效地替代使用最优函数。在这个初步的概念验证说明中,我概述了一些关键结果,并提供了有关新方法属性的数值证据。另一份即将出版的手稿将详细阐述理论和数值细节。

英文摘要:

We can, and should, do statistical inference on simulation models by adjusting the parameters in the simulation so that the values of {\em randomly chosen} functions of the simulation output match the values of those same functions calculated on the data. Results from the "state-space reconstruction" or "geometry from a time series'' literature in nonlinear dynamics indicate that just $2d+1$ such functions will typically suffice to identify a model with a $d$-dimensional parameter space. Results from the "random features" literature in machine learning suggest that using random functions of the data can be an efficient replacement for using optimal functions. In this preliminary, proof-of-concept note, I sketch some of the key results, and present numerical evidence about the new method's properties. A separate, forthcoming manuscript will elaborate on theoretical and numerical details.

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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