no code implementations • 12 Feb 2024 • Sarah Almeida Carneiro, Giovanni Chierchia, Aurelie Pirayre, Laurent Najman
A persistent challenge in the field of Intelligent Transportation Systems is to extract accurate traffic insights from geographic regions with scarce or no data coverage.
no code implementations • 2 Oct 2023 • Sarah Almeida Carneiro, Giovanni Chierchia, Jean Charléty, Aurélie Chataignon, Laurent Najman
One concern is that, although there are studies that give good results for these data, the data from these regions may not be sufficiently representative to describe all the traffic patterns in the rest of the world.
no code implementations • 13 Sep 2023 • Nicolas Michel, Romain Negrel, Giovanni Chierchia, Jean-François Bercher
Continual Learning has been challenging, especially when dealing with unsupervised scenarios such as Unsupervised Online General Continual Learning (UOGCL), where the learning agent has no prior knowledge of class boundaries or task change information.
no code implementations • 1 Sep 2023 • Nicolas Michel, Giovanni Chierchia, Romain Negrel, Jean-François Bercher, Toshihiko Yamasaki
This scenario, known as Continual Learning (CL) poses challenges to standard learning algorithms which struggle to maintain knowledge of old tasks while learning new ones.
1 code implementation • 6 Jun 2023 • Nicolas Michel, Giovanni Chierchia, Romain Negrel, Jean-François Bercher
We propose to use the angular Gaussian distribution, which corresponds to a Gaussian projected on the unit-sphere and derive the associated loss function.
1 code implementation • 12 Jul 2022 • Nicolas Michel, Romain Negrel, Giovanni Chierchia, Jean-François Bercher
We study Online Continual Learning with missing labels and propose SemiCon, a new contrastive loss designed for partly labeled data.
2 code implementations • 9 Sep 2021 • Hermina Petric Maretic, Mireille El Gheche, Giovanni Chierchia, Pascal Frossard
We tackle the problem of graph alignment by computing graph permutations that minimise our new filter distances, which implicitly solves the graph comparison problem.
1 code implementation • 9 Nov 2020 • Pooja Gupta, Jyoti Maggu, Angshul Majumdar, Emilie Chouzenoux, Giovanni Chierchia
This work addresses the problem of analyzing multi-channel time series data %.
no code implementations • 9 Nov 2020 • Pooja Gupta, Angshul Majumdar, Emilie Chouzenoux, Giovanni Chierchia
This work proposes a supervised multi-channel time-series learning framework for financial stock trading.
no code implementations • 9 Nov 2020 • Pooja Gupta, Jyoti Maggu, Angshul Majumdar, Emilie Chouzenoux, Giovanni Chierchia
This work proposes an unsupervised fusion framework based on deep convolutional transform learning.
no code implementations • 2 Oct 2020 • Jyoti Maggu, Angshul Majumdar, Emilie Chouzenoux, Giovanni Chierchia
This work introduces a new unsupervised representation learning technique called Deep Convolutional Transform Learning (DCTL).
no code implementations • 12 Mar 2020 • Hermina Petric Maretic, Mireille El Gheche, Matthias Minder, Giovanni Chierchia, Pascal Frossard
We propose a novel method for comparing non-aligned graphs of different sizes, based on the Wasserstein distance between graph signal distributions induced by the respective graph Laplacian matrices.
1 code implementation • NeurIPS 2019 • Hermina Petric Maretic, Mireille El Gheche, Giovanni Chierchia, Pascal Frossard
We present a novel framework based on optimal transport for the challenging problem of comparing graphs.
1 code implementation • NeurIPS 2019 • Giovanni Chierchia, Benjamin Perret
We study the problem of fitting an ultrametric distance to a dissimilarity graph in the context of hierarchical cluster analysis.
no code implementations • 13 Dec 2018 • Mireille El Gheche, Giovanni Chierchia, Pascal Frossard
In this paper, we propose a scalable algorithm for spectral embedding.
no code implementations • 2 Nov 2018 • Mireille El Gheche, Giovanni Chierchia, Pascal Frossard
We propose in this paper to extend the node clustering problem, that commonly considers only the network information, to a problem where both the network information and the node features are considered together for learning a clustering-friendly representation of the feature space.
no code implementations • 23 May 2018 • Viacheslav Dudar, Giovanni Chierchia, Emilie Chouzenoux, Jean-Christophe Pesquet, Vladimir Semenov
In this paper, we develop a novel second-order method for training feed-forward neural nets.
no code implementations • 25 Dec 2017 • Luis M. Briceno-Arias, Giovanni Chierchia, Emilie Chouzenoux, Jean-Christophe Pesquet
In this paper, we propose a new optimization algorithm for sparse logistic regression based on a stochastic version of the Douglas-Rachford splitting method.
no code implementations • 21 Mar 2014 • Giovanni Chierchia, Nelly Pustelnik, Beatrice Pesquet-Popescu, Jean-Christophe Pesquet
In this paper, we extend the NLTV-based regularization to multicomponent images by taking advantage of the Structure Tensor (ST) resulting from the gradient of a multicomponent image.