Data fusion for Uncertainty Quantification with Non-Intrusive Polynomial Chaos
Data fusion for Uncertainty Quantification with Non-Intrusive Polynomial Chaos
复制标题
非侵入式多项式混沌不确定性量化的数据融合
DOI:
10.1016/j.cma.2020.113577
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发表时间:
2021
影响因子:
7.2
通讯作者:
Pepper N
中科院分区:
文献类型:
--
作者:
Pepper N
This work presents a framework for updating an estimate of a probability distribution, arising from an uncertainty propagation using Non-intrusive Polynomial Chaos (NIPC), with scarce experimental measurements of a Quantity of Interest (QoI). In recent years much work has been directed towards developing methods of combining models of different accuracies in order to propagate uncertainty, but the problem of improving uncertainty propagations by considering evidence from both computational models and experiments has received less attention.The framework described here uses the Maximum Entropy Principle (MEP) to find an updated, least biased estimate of a probability distribution by maximising the entropy between the original and updated estimates. A constrained optimisation is performed to find the coefficients of a Polynomial Chaos Expansion (PCE) that minimise the Kullback–Leibler (KL) divergence between estimates, while ensuring that the new estimate conforms to constraints imposed by the available experimental measurements of the QoI. In this work a novel constraint is used, based upon the Dvoretzky–Kiefer–Wolfowitz inequality and the Massart bound (DKWM), as opposed to the more commonly used moment-based constraints. Such a constraint allows scarce experimental data to be used in informing the updated estimate of the probability distribution.
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DOI:
10.2139/ssrn.2403561
发表时间:
2014
期刊:
Forecasting Models eJournal
影响因子:
--
作者:
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通讯作者:
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DOI:
10.1016/j.cma.2019.112571
发表时间:
2019-12
影响因子:
7.2
作者:
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通讯作者:
Nick Pepper;F. Montomoli;Sanjiv Sharma
DOI:
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发表时间:
2018
期刊:
The Journal of chemical physics
影响因子:
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发表时间:
2017
期刊:
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影响因子:
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通讯作者:
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DOI:
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发表时间:
2015
期刊:
影响因子:
--
作者:
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通讯作者:
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