Search Results for author: Aurélien Decelle

Found 17 papers, 7 papers with code

Predicting large scale cosmological structure evolution with GAN-based autoencoders

no code implementations4 Mar 2024 Marion Ullmo, Nabila Aghnim, Aurélien Decelle, Miguel Aragon-Calvo

Cosmological simulations play a key role in the prediction and understanding of large scale structure formation from initial conditions.

The Copycat Perceptron: Smashing Barriers Through Collective Learning

no code implementations7 Aug 2023 Giovanni Catania, Aurélien Decelle, Beatriz Seoane

We characterize the equilibrium properties of a model of $y$ coupled binary perceptrons in the teacher-student scenario, subject to a learning rule, with an explicit ferromagnetic coupling proportional to the Hamming distance between the students' weights.

Federated Learning

Fast and Functional Structured Data Generators Rooted in Out-of-Equilibrium Physics

1 code implementation13 Jul 2023 Alessandra Carbone, Aurélien Decelle, Lorenzo Rosset, Beatriz Seoane

In this study, we address the challenge of using energy-based models to produce high-quality, label-specific data in complex structured datasets, such as population genetics, RNA or protein sequences data.

Unsupervised hierarchical clustering using the learning dynamics of RBMs

1 code implementation3 Feb 2023 Aurélien Decelle, Lorenzo Rosset, Beatriz Seoane

Datasets in the real world are often complex and to some degree hierarchical, with groups and sub-groups of data sharing common characteristics at different levels of abstraction.

Clustering

Explaining the effects of non-convergent sampling in the training of Energy-Based Models

no code implementations23 Jan 2023 Elisabeth Agoritsas, Giovanni Catania, Aurélien Decelle, Beatriz Seoane

In this paper, we quantify the impact of using non-convergent Markov chains to train Energy-Based models (EBMs).

Thermodynamics of bidirectional associative memories

no code implementations17 Nov 2022 Adriano Barra, Giovanni Catania, Aurélien Decelle, Beatriz Seoane

Introduced by Kosko in 1988 as a generalization of the Hopfield model to a bipartite structure, the simplest architecture is defined by two layers of neurons, with synaptic connections only between units of different layers: even without internal connections within each layer, information storage and retrieval are still possible through the reverberation of neural activities passing from one layer to another.

Retrieval

Learning a Restricted Boltzmann Machine using biased Monte Carlo sampling

1 code implementation2 Jun 2022 Nicolas Béreux, Aurélien Decelle, Cyril Furtlehner, Beatriz Seoane

Moreover, we show that this sampling technique can also be used to improve the computation of the log-likelihood gradient during training, leading to dramatic improvements in training RBMs with artificial clustered datasets.

Regularization of Mixture Models for Robust Principal Graph Learning

1 code implementation16 Jun 2021 Tony Bonnaire, Aurélien Decelle, Nabila Aghanim

A regularized version of Mixture Models is proposed to learn a principal graph from a distribution of $D$-dimensional data points.

Graph Learning

Equilibrium and non-Equilibrium regimes in the learning of Restricted Boltzmann Machines

1 code implementation NeurIPS 2021 Aurélien Decelle, Cyril Furtlehner, Beatriz Seoane

In this work, we show that this mixing time plays a crucial role in the dynamics and stability of the trained model, and that RBMs operate in two well-defined regimes, namely equilibrium and out-of-equilibrium, depending on the interplay between this mixing time of the model and the number of steps, $k$, used to approximate the gradient.

Restricted Boltzmann Machine, recent advances and mean-field theory

no code implementations23 Nov 2020 Aurélien Decelle, Cyril Furtlehner

This review deals with Restricted Boltzmann Machine (RBM) under the light of statistical physics.

Encoding large scale cosmological structure with Generative Adversarial Networks

no code implementations10 Nov 2020 Marion Ullmo, Aurélien Decelle, Nabila Aghanim

We find that the GAN successfully generates new images that are statistically consistent with the images it was trained on.

Robust Multi-Output Learning with Highly Incomplete Data via Restricted Boltzmann Machines

no code implementations19 Dec 2019 Giancarlo Fissore, Aurélien Decelle, Cyril Furtlehner, Yufei Han

In order to take full advantage of these dependencies we consider a purely probabilistic setting in which the features imputation and multi-label classification problems are jointly solved.

Classification General Classification +3

Gaussian-Spherical Restricted Boltzmann Machines

no code implementations31 Oct 2019 Aurélien Decelle, Cyril Furtlehner

We consider a special type of Restricted Boltzmann machine (RBM), namely a Gaussian-spherical RBM where the visible units have Gaussian priors while the vector of hidden variables is constrained to stay on an ${\mathbbm L}_2$ sphere.

Learning a Local Symmetry with Neural-Networks

1 code implementation16 Apr 2019 Aurélien Decelle, Victor Martin-Mayor, Beatriz Seoane

We explore the capacity of neural networks to detect a symmetry with complex local and non-local patterns : the gauge symmetry Z 2 .

Thermodynamics of Restricted Boltzmann Machines and related learning dynamics

no code implementations5 Mar 2018 Aurélien Decelle, Giancarlo Fissore, Cyril Furtlehner

In the non-linear regime, instead, the selected modes interact and eventually impose a matching of the order parameters to their empirical counterparts estimated from the data.

Spectral Dynamics of Learning Restricted Boltzmann Machines

no code implementations9 Aug 2017 Aurélien Decelle, Giancarlo Fissore, Cyril Furtlehner

This let us show how in the linear regime, in which the RBM is found to operate at the beginning of the training, the statistical properties of the data drive the selection of the unstable modes of the weight matrix.

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