Search Results for author: Luca Dede'

Found 8 papers, 0 papers with code

Discovering Artificial Viscosity Models for Discontinuous Galerkin Approximation of Conservation Laws using Physics-Informed Machine Learning

no code implementations26 Feb 2024 Matteo Caldana, Paola F. Antonietti, Luca Dede'

Finite element-based high-order solvers of conservation laws offer large accuracy but face challenges near discontinuities due to the Gibbs phenomenon.

Physics-informed machine learning

Real-time whole-heart electromechanical simulations using Latent Neural Ordinary Differential Equations

no code implementations8 Jun 2023 Matteo Salvador, Marina Strocchi, Francesco Regazzoni, Luca Dede', Steven Niederer, Alfio Quarteroni

The trained LNODEs provides a compact and efficient representation of the 3D-0D model in a latent space by means of a feedforward fully-connected Artificial Neural Network that retains 3 hidden layers with 13 neurons per layer and allows for 300x real-time numerical simulations of the cardiac function on a single processor of a standard laptop.

Uncertainty Quantification

Latent Dynamics Networks (LDNets): learning the intrinsic dynamics of spatio-temporal processes

no code implementations28 Apr 2023 Francesco Regazzoni, Stefano Pagani, Matteo Salvador, Luca Dede', Alfio Quarteroni

We propose a novel architecture, named Latent Dynamics Network (LDNet), which is able to discover low-dimensional intrinsic dynamics of possibly non-Markovian dynamical systems, thus predicting the time evolution of space-dependent fields in response to external inputs.

Dimensionality Reduction

A Deep Learning algorithm to accelerate Algebraic Multigrid methods in Finite Element solvers of 3D elliptic PDEs

no code implementations21 Apr 2023 Matteo Caldana, Paola F. Antonietti, Luca Dede'

In particular, the strong threshold parameter is the most relevant since it stands at the basis of the construction of successively coarser grids needed by the AMG methods.

A cardiac electromechanics model coupled with a lumped parameters model for closed-loop blood circulation. Part II: numerical approximation

no code implementations30 Nov 2020 Francesco Regazzoni, Matteo Salvador, Pasquale Claudio Africa, Marco Fedele, Luca Dede', Alfio Quarteroni

In the framework of accurate and efficient segregated schemes for 3D cardiac electromechanics and 0D cardiovascular models, we propose here a novel numerical approach to address the coupled 3D-0D problem introduced in Part I of this two-part series of papers.

Numerical Analysis Numerical Analysis

A Mathematical Dashboard for the Analysis of Italian COVID-19 Epidemic Data

no code implementations22 Nov 2020 Nicola Parolini, Giovanni Ardenghi, Luca Dede', Alfio Quarteroni

An analysis of the COVID-19 epidemic is proposed on the basis of the epiMOX dashboard (publicly accessible at https://www. epimox. polimi. it) that deals with data of the epidemic trends and outbreaks in Italy from late February 2020.

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