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- W4280496902 abstract "We propose the use of reduced-order modeling to improve the sensitivity coefficient evaluation method based on Lasso-type penalized linear regression. In this method, cross sections of interest are uniformly randomly sampled, and corresponding perturbed core analyses are performed. The sensitivity coefficients of the higher-dimensional model are expanded by the active subspace (AS) attained by the lower-dimensional model, and the expansion coefficients are estimated by the Lasso regression. In addition, AS bases can be flexibly chosen according to neutronics parameters of interest. We conducted a verification calculation for an accelerator-driven system and clarified that the proposed method successfully reduces the calculation cost by a couple of orders of magnitude compared with the direct method. The proposed method can be used to practically evaluate the sensitivity coefficients of various parameters." @default.
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- W4280496902 date "2022-05-12" @default.
- W4280496902 modified "2023-10-14" @default.
- W4280496902 title "Sensitivity Coefficient Evaluation of an Accelerator-Driven System Using ROM-Lasso Method" @default.
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- W4280496902 doi "https://doi.org/10.1080/00295639.2022.2067447" @default.
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