Sensitivity analysis based dimension reduction of multiscale models

Anna Nikishova, Giovanni E. Comi and Alfons G. Hoekstra

Mathematics and Computers in Simulation (MATCOM), 2020, vol. 170, issue C, 205-220

Abstract: In this paper, the sensitivity analysis of a single scale model is employed in order to reduce the input dimensionality of the related multiscale model, in this way, improving the efficiency of its uncertainty estimation. The approach is illustrated with two examples: a reaction model and the standard Ornstein–Uhlenbeck process. Additionally, a counterexample shows that an uncertain input should not be excluded from uncertainty quantification without estimating the response sensitivity to this parameter. In particular, an analysis of the function defining the relation between single scale components is required to understand whether single scale sensitivity analysis can be used to reduce the dimensionality of the overall multiscale model input space.

Keywords: Dimension reduction; Sensitivity analysis; Uncertainty quantification; Multiscale model; Coupled models; Sobol sensitivity indices (search for similar items in EconPapers)
Date: 2020
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Persistent link: https://EconPapers.repec.org/RePEc:eee:matcom:v:170:y:2020:i:c:p:205-220

DOI: 10.1016/j.matcom.2019.10.013

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