1 code implementation • 1 Feb 2024 • Myriam Bontonou, Anaïs Haget, Maria Boulougouri, Benjamin Audit, Pierre Borgnat, Jean-Michel Arbona
A collection of machine learning models including logistic regression, multilayer perceptron, and graph neural network are trained to classify samples according to their cancer type.
1 code implementation • 19 Mar 2023 • Myriam Bontonou, Anaïs Haget, Maria Boulougouri, Jean-Michel Arbona, Benjamin Audit, Pierre Borgnat
The scientific questions are formulated as classical learning problems on tabular data or on graphs, e. g. phenotype prediction from gene expression data.
no code implementations • 14 Mar 2023 • Thummaluru Siddartha Reddy, Sundeep Prabhakar Chepuri, Pierre Borgnat
Then, leveraging the Cheeger inequality, we propose the simplicial spectral clustering algorithm.
no code implementations • 26 Sep 2022 • Yacouba Kaloga, Pierre Borgnat, Amaury Habrard
Therefore, many metric learning algorithms have been developed in recent years, mainly for Euclidean data in order to improve performance of classification or clustering methods.
2 code implementations • 1 Aug 2022 • George Miloshevich, Bastien Cozian, Patrice Abry, Pierre Borgnat, Freddy Bouchet
The main scientific message is that most of the time, training neural networks for predicting extreme heatwaves occurs in a regime of lack of data.
1 code implementation • 29 Apr 2021 • Sibylle Marcotte, Amélie Barbe, Rémi Gribonval, Titouan Vayer, Marc Sebban, Pierre Borgnat, Paulo Gonçalves
Diffusing a graph signal at multiple scales requires computing the action of the exponential of several multiples of the Laplacian matrix.
no code implementations • 17 Mar 2021 • Valérian Jacques-Dumas, Francesco Ragone, Pierre Borgnat, Patrice Abry, Freddy Bouchet
The present work explores the use of deep learning architectures, trained using outputs of a climate model, as an alternative strategy to forecast the occurrence of extreme long-lasting heatwaves.
no code implementations • 30 Oct 2020 • Yacouba Kaloga, Pierre Borgnat, Sundeep Prabhakar Chepuri, Patrice Abry, Amaury Habrard
We present a novel multiview canonical correlation analysis model based on a variational approach.
1 code implementation • 7 Jul 2020 • Louis Béthune, Yacouba Kaloga, Pierre Borgnat, Aurélien Garivier, Amaury Habrard
We propose a novel algorithm for unsupervised graph representation learning with attributed graphs.
1 code implementation • 31 Oct 2019 • Raimon Fabregat, Nelly Pustelnik, Paulo Gonçalves, Pierre Borgnat
Non-negative matrix factorization is a problem of dimensionality reduction and source separation of data that has been widely used in many fields since it was studied in depth in 1999 by Lee and Seung, including in compression of data, document clustering, processing of audio spectrograms and astronomy.
no code implementations • 28 Nov 2018 • Harry Sevi, Gabriel Rilling, Pierre Borgnat
We introduce a novel harmonic analysis for functions defined on the vertices of a strongly connected directed graph of which the random walk operator is the cornerstone.
no code implementations • 3 Nov 2017 • Nicolas Tremblay, Paulo Gonçalves, Pierre Borgnat
The aim of this chapter is to review general concepts for the introduction of filters and representations of graph signals.
Signal Processing Information Theory Social and Information Networks Information Theory
no code implementations • 29 Sep 2015 • Nicolas Tremblay, Gilles Puy, Pierre Borgnat, Remi Gribonval, Pierre Vandergheynst
We build upon recent advances in graph signal processing to propose a faster spectral clustering algorithm.
Social and Information Networks Numerical Analysis