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- W2963089830 abstract "This paper introduces a new generalized polynomial chaos expansion (PCE) comprising measure-consistent multivariate orthonormal polynomials in dependent random variables. Unlike existing PCEs, whether classical or generalized, no tensor-product structure is assumed or required. Important mathematical properties of the generalized PCE are studied by constructing orthogonal decomposition of polynomial spaces, explaining completeness of orthogonal polynomials for prescribed assumptions, exploiting whitening transformation for generating orthonormal polynomial bases, and demonstrating mean-square convergence to the correct limit. Analytical formulae are proposed to calculate the mean and variance of a truncated generalized PCE for a general output variable in terms of the expansion coefficients. An example derived from a stochastic boundary-value problem illustrates the generalized PCE approximation in estimating the statistical properties of an output variable for 12 distinct non-product-type probability measures of input variables." @default.
- W2963089830 created "2019-07-30" @default.
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- W2963089830 date "2018-08-01" @default.
- W2963089830 modified "2023-10-01" @default.
- W2963089830 title "A polynomial chaos expansion in dependent random variables" @default.
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- W2963089830 doi "https://doi.org/10.1016/j.jmaa.2018.04.032" @default.
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