Search Results for author: Nicola Demo

Found 20 papers, 8 papers with code

Generative Adversarial Reduced Order Modelling

1 code implementation25 May 2023 Dario Coscia, Nicola Demo, Gianluigi Rozza

In this work, we present GAROM, a new approach for reduced order modelling (ROM) based on generative adversarial networks (GANs).

A DeepONet multi-fidelity approach for residual learning in reduced order modeling

no code implementations24 Feb 2023 Nicola Demo, Marco Tezzele, Gianluigi Rozza

We propose to couple the model reduction to a machine learning residual learning, such that the above-mentioned error can be learned by a neural network and inferred for new predictions.

A Graph-based Framework for Complex System Simulating and Diagnosis with Automatic Reconfiguration

no code implementations10 Feb 2023 Martina Teruzzi, Nicola Demo, Gianluigi Rozza

To model the typical operation of industrial plants, we propose several additions with respect to the standard graphs: 1. a quantitative measure to control the overall residual capacity, 2. nodes of different categories - and then different behaviors - and 3. a fault propagation procedure based on the predecessors and the redundancy of the system.

Fault Detection

A Continuous Convolutional Trainable Filter for Modelling Unstructured Data

no code implementations24 Oct 2022 Dario Coscia, Laura Meneghetti, Nicola Demo, Giovanni Stabile, Gianluigi Rozza

The fundamental building block of a CNN is a trainable filter, represented as a discrete grid, used to perform convolution on discrete input data.

A Proper Orthogonal Decomposition approach for parameters reduction of Single Shot Detector networks

no code implementations27 Jul 2022 Laura Meneghetti, Nicola Demo, Gianluigi Rozza

As a major breakthrough in artificial intelligence and deep learning, Convolutional Neural Networks have achieved an impressive success in solving many problems in several fields including computer vision and image processing.

Dimensionality Reduction Object Recognition +1

An extended physics informed neural network for preliminary analysis of parametric optimal control problems

no code implementations26 Oct 2021 Nicola Demo, Maria Strazzullo, Gianluigi Rozza

In this work we propose an extension of physics informed supervised learning strategies to parametric partial differential equations.

A Dimensionality Reduction Approach for Convolutional Neural Networks

no code implementations18 Oct 2021 Laura Meneghetti, Nicola Demo, Gianluigi Rozza

The focus of this paper is the application of classical model order reduction techniques, such as Active Subspaces and Proper Orthogonal Decomposition, to Deep Neural Networks.

Dimensionality Reduction

Gaussian process approach within a data-driven POD framework for fluid dynamics engineering problems

no code implementations3 Dec 2020 Giulio Ortali, Nicola Demo, Gianluigi Rozza

This work describes the implementation of a data-driven approach for the reduction of the complexity of parametrical partial differential equations (PDEs) employing Proper Orthogonal Decomposition (POD) and Gaussian Process Regression (GPR).

GPR Numerical Analysis Numerical Analysis

A supervised learning approach involving active subspaces for an efficient genetic algorithm in high-dimensional optimization problems

1 code implementation12 Jun 2020 Nicola Demo, Marco Tezzele, Gianluigi Rozza

In this work, we present an extension of the genetic algorithm (GA) which exploits the supervised learning technique called active subspaces (AS) to evolve the individuals on a lower dimensional space.

Numerical Analysis Numerical Analysis Optimization and Control

Enhancing CFD predictions in shape design problems by model and parameter space reduction

1 code implementation15 Jan 2020 Marco Tezzele, Nicola Demo, Giovanni Stabile, Andrea Mola, Gianluigi Rozza

In this work we present an advanced computational pipeline for the approximation and prediction of the lift coefficient of a parametrized airfoil profile.

Numerical Analysis Numerical Analysis

A non-intrusive approach for proper orthogonal decomposition modal coefficients reconstruction through active subspaces

no code implementations30 Jul 2019 Nicola Demo, Marco Tezzele, Gianluigi Rozza

Using this space, an approximation of the numerical solution for new parameters can be computed in real-time response scenario, thanks to the reduced dimensionality of the problem.

Numerical Analysis Numerical Analysis

A complete data-driven framework for the efficient solution of parametric shape design and optimisation in naval engineering problems

1 code implementation15 May 2019 Nicola Demo, Marco Tezzele, Andrea Mola, Gianluigi Rozza

Mandatory ingredient for the ROM methods is the relation between the high-fidelity solutions and the parameters.

Numerical Analysis

Shape optimization through proper orthogonal decomposition with interpolation and dynamic mode decomposition enhanced by active subspaces

1 code implementation14 May 2019 Marco Tezzele, Nicola Demo, Gianluigi Rozza

In previous works we studied the reduction of the parameter space in naval engineering through AS [38, 10] focusing on different parts of the hull.

Numerical Analysis

Reduced Order Isogeometric Analysis Approach for PDEs in Parametrized Domains

no code implementations21 Nov 2018 Fabrizio Garotta, Nicola Demo, Marco Tezzele, Massimo Carraturo, Alessandro Reali, Gianluigi Rozza

In this contribution, we coupled the isogeometric analysis to a reduced order modelling technique in order to provide a computationally efficient solution in parametric domains.

Numerical Analysis

An integrated data-driven computational pipeline with model order reduction for industrial and applied mathematics

2 code implementations29 Oct 2018 Marco Tezzele, Nicola Demo, Andrea Mola, Gianluigi Rozza

In this work we present an integrated computational pipeline involving several model order reduction techniques for industrial and applied mathematics, as emerging technology for product and/or process design procedures.

Numerical Analysis

Model Order Reduction by means of Active Subspaces and Dynamic Mode Decomposition for Parametric Hull Shape Design Hydrodynamics

no code implementations20 Mar 2018 Marco Tezzele, Nicola Demo, Mahmoud Gadalla, Andrea Mola, Gianluigi Rozza

We present the results of the application of a parameter space reduction methodology based on active subspaces (AS) to the hull hydrodynamic design problem.

Numerical Analysis

Shape Optimization by means of Proper Orthogonal Decomposition and Dynamic Mode Decomposition

1 code implementation20 Mar 2018 Nicola Demo, Marco Tezzele, Gianluca Gustin, Gianpiero Lavini, Gianluigi Rozza

Shape optimization is a challenging task in many engineering fields, since the numerical solutions of parametric system may be computationally expensive.

Numerical Analysis

An efficient shape parametrisation by free-form deformation enhanced by active subspace for hull hydrodynamic ship design problems in open source environment

1 code implementation19 Jan 2018 Nicola Demo, Marco Tezzele, Andrea Mola, Gianluigi Rozza

To this end, a fully automated procedure has been implemented to produce several small shape perturbations of an original hull CAD geometry which are then used to carry out high-fidelity flow simulations and collect data for the active subspaces analysis.

Numerical Analysis

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