Search Results for author: Stefania Fresca

Found 10 papers, 1 papers with code

Deep Learning-based surrogate models for parametrized PDEs: handling geometric variability through graph neural networks

no code implementations3 Aug 2023 Nicola Rares Franco, Stefania Fresca, Filippo Tombari, Andrea Manzoni

We also assess, from a numerical standpoint, the importance of using GNNs, rather than classical dense deep neural networks, for the proposed framework.

Computational Efficiency valid

Reduced order modeling of parametrized systems through autoencoders and SINDy approach: continuation of periodic solutions

no code implementations13 Nov 2022 Paolo Conti, Giorgio Gobat, Stefania Fresca, Andrea Manzoni, Attilio Frangi

Highly accurate simulations of complex phenomena governed by partial differential equations (PDEs) typically require intrusive methods and entail expensive computational costs, which might become prohibitive when approximating steady-state solutions of PDEs for multiple combinations of control parameters and initial conditions.

Virtual twins of nonlinear vibrating multiphysics microstructures: physics-based versus deep learning-based approaches

no code implementations12 May 2022 Giorgio Gobat, Stefania Fresca, Andrea Manzoni, Attilio Frangi

Micro-Electro-Mechanical-Systems are complex structures, often involving nonlinearites of geometric and multiphysics nature, that are used as sensors and actuators in countless applications.

Deep-HyROMnet: A deep learning-based operator approximation for hyper-reduction of nonlinear parametrized PDEs

no code implementations5 Feb 2022 Ludovica Cicci, Stefania Fresca, Andrea Manzoni

To speed-up the solution to parametrized differential problems, reduced order models (ROMs) have been developed over the years, including projection-based ROMs such as the reduced-basis (RB) method, deep learning-based ROMs, as well as surrogate models obtained via a machine learning approach.

Long-time prediction of nonlinear parametrized dynamical systems by deep learning-based reduced order models

no code implementations25 Jan 2022 Federico Fatone, Stefania Fresca, Andrea Manzoni

Deep learning-based reduced order models (DL-ROMs) have been recently proposed to overcome common limitations shared by conventional ROMs - built, e. g., exclusively through proper orthogonal decomposition (POD) - when applied to nonlinear time-dependent parametrized PDEs.

Dimensionality Reduction

Long-time prediction of nonlinear parametrized dynamical systems by deep learning-based ROMs

no code implementations NeurIPS Workshop DLDE 2021 Stefania Fresca, Federico Fatone, Andrea Manzoni

Deep learning-based reduced order models (DL-ROMs) have been recently proposed to overcome common limitations shared by conventional ROMs - built, e. g., through proper orthogonal decomposition (POD) - when applied to nonlinear time-dependent parametrized PDEs.

Dimensionality Reduction

Real-time simulation of parameter-dependent fluid flows through deep learning-based reduced order models

no code implementations10 Jun 2021 Stefania Fresca, Andrea Manzoni

Reduced order models (ROMs) relying, e. g., on proper orthogonal decomposition (POD) provide reliable approximations to parameter-dependent fluid dynamics problems in rapid times.

Dimensionality Reduction

POD-DL-ROM: enhancing deep learning-based reduced order models for nonlinear parametrized PDEs by proper orthogonal decomposition

no code implementations28 Jan 2021 Stefania Fresca, Andrea Manzoni

Deep learning-based reduced order models (DL-ROMs) have been recently proposed to overcome common limitations shared by conventional reduced order models (ROMs) - built, e. g., through proper orthogonal decomposition (POD) - when applied to nonlinear time-dependent parametrized partial differential equations (PDEs).

Dimensionality Reduction

Deep learning-based reduced order models in cardiac electrophysiology

1 code implementation2 Jun 2020 Stefania Fresca, Andrea Manzoni, Luca Dedè, Alfio Quarteroni

These systems describe the cardiac action potential, that is the polarization/depolarization cycle occurring at every heart beat that models the time evolution of the electrical potential across the cell membrane, as well as a set of ionic variables.

A comprehensive deep learning-based approach to reduced order modeling of nonlinear time-dependent parametrized PDEs

no code implementations12 Jan 2020 Stefania Fresca, Luca Dede, Andrea Manzoni

Traditional reduced order modeling techniques such as the reduced basis (RB) method (relying, e. g., on proper orthogonal decomposition (POD)) suffer from severe limitations when dealing with nonlinear time-dependent parametrized PDEs, because of the fundamental assumption of linear superimposition of modes they are based on.

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