Search Results for author: Bruno Sudret

Found 5 papers, 1 papers with code

Emulating the dynamics of complex systems using autoregressive models on manifolds (mNARX)

no code implementations28 Jun 2023 Styfen Schär, Stefano Marelli, Bruno Sudret

We propose a novel surrogate modelling approach to efficiently and accurately approximate the response of complex dynamical systems driven by time-varying exogenous excitations over extended time periods.

Dimensionality Reduction

Automatic selection of basis-adaptive sparse polynomial chaos expansions for engineering applications

no code implementations10 Sep 2020 Nora Lüthen, Stefano Marelli, Bruno Sudret

Sparse polynomial chaos expansions (PCE) are an efficient and widely used surrogate modeling method in uncertainty quantification for engineering problems with computationally expensive models.

Compressive Sensing Experimental Design +1

Sparse Polynomial Chaos Expansions: Literature Survey and Benchmark

no code implementations4 Feb 2020 Nora Lüthen, Stefano Marelli, Bruno Sudret

Sparse polynomial chaos expansions (PCE) are a popular surrogate modelling method that takes advantage of the properties of PCE, the sparsity-of-effects principle, and powerful sparse regression solvers to approximate computer models with many input parameters, relying on only few model evaluations.

Numerical Analysis Numerical Analysis Computation Methodology

Euclid preparation: II. The EuclidEmulator -- A tool to compute the cosmology dependence of the nonlinear matter power spectrum

1 code implementation12 Sep 2018 Euclid Collaboration, Mischa Knabenhans, Joachim Stadel, Stefano Marelli, Doug Potter, Romain Teyssier, Laurent Legrand, Aurel Schneider, Bruno Sudret, Linda Blot, Saeeda Awan, Carlo Burigana, Carla Sofia Carvalho, Hannu Kurki-Suonio, Gabriele Sirri

The absolute accuracy of the final nonlinear power spectrum is comparable to one obtained with N-body simulations, i. e. $\sim 1\%$ for $k\lesssim 1\, h\,{\rm Mpc}^{-1}$ and $z\lesssim 3. 5$.

Cosmology and Nongalactic Astrophysics

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