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arXiv 2103.01132stat.ME
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数学模型的一般贝叶斯 L2 校准

General Bayesian L2 calibration of mathematical models

University of Southampton(南安普顿大学);Queensland University of Technology(昆士兰科技大学)

Antony M. Overstall, James M. McGree

AI总结:

本文研究数学模型的校准参数估计问题,以平方 $L^2$ 范数衡量模型与物理系统的接近度,提出并比较了多种贝叶斯与一般贝叶斯方法。

摘要:

数学模型是一个函数,它接收特定参数并返回物理系统某一特征的理论预测。数学模型的参数可分为两组:(a) 系统的可控变量;(b) 校准参数:物理系统中无法控制或直接测量的未知特征。研究重点是利用物理观测来估计校准参数。由于数学模型对物理系统的表示并不精确:目标是估计校准参数的值,使数学模型与物理系统“接近”。这种接近度定义为数学模型与物理系统之间差值的平方 $L^2$ 范数。为此任务引入、开发并比较了不同的贝叶斯和一般贝叶斯方法。

英文摘要:

A mathematical model is a function taking certain arguments and returning a theoretical prediction of a feature of a physical system. The arguments to the mathematical model can be split into two groups; (a) controllable variables of the system; and (b) calibration parameters: unknown characteristics of the physical system that cannot be controlled or directly measured. Of interest is the estimation of the calibration parameter using physical observations. Since the mathematical model will be an inexact representation of the physical system: the aim is to estimate values for the calibration parameters to make the mathematical model ``close" to the physical system. Closeness is defined as the squared $L^2$ norm of the difference between the mathematical model and the physical system. Different Bayesian and general Bayesian methods are introduced, developed and compared for this task.

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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