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Journal of Safety Science and Resilience
Article . 2023 . Peer-reviewed
License: CC BY NC ND
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Article . 2022 . Peer-reviewed
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https://dx.doi.org/10.48550/ar...
Article . 2021
License: arXiv Non-Exclusive Distribution
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Article . 2021
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Data-Driven Sparse Polynomial Chaos Expansion for Models with Dependent Inputs

Authors: Zhanlin Liu; Youngjun Choe;

Data-Driven Sparse Polynomial Chaos Expansion for Models with Dependent Inputs

Abstract

Polynomial chaos expansions (PCEs) have been used in many real-world engineering applications to quantify how the uncertainty of an output is propagated from inputs. PCEs for models with independent inputs have been extensively explored in the literature. Recently, different approaches have been proposed for models with dependent inputs to expand the use of PCEs to more real-world applications. Typical approaches include building PCEs based on the Gram-Schmidt algorithm or transforming the dependent inputs into independent inputs. However, the two approaches have their limitations regarding computational efficiency and additional assumptions about the input distributions, respectively. In this paper, we propose a data-driven approach to build sparse PCEs for models with dependent inputs. The proposed algorithm recursively constructs orthonormal polynomials using a set of monomials based on their correlations with the output. The proposed algorithm on building sparse PCEs not only reduces the number of minimally required observations but also improves the numerical stability and computational efficiency. Four numerical examples are implemented to validate the proposed algorithm.

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Keywords

FOS: Computer and information sciences, Sparse polynomial chaos expansion, Machine Learning (stat.ML), Systems and Control (eess.SY), Gram–Schmidt orthogonalization, Electrical Engineering and Systems Science - Systems and Control, Polynomial chaos expansion, Methodology (stat.ME), HD61, Statistics - Machine Learning, FOS: Electrical engineering, electronic engineering, information engineering, Risk in industry. Risk management, Uncertainty quantification, Statistics - Methodology

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
2
Average
Average
Average
Green
gold