Search Results for author: Giovanni Chierchia

Found 19 papers, 6 papers with code

Clustering Dynamics for Improved Speed Prediction Deriving from Topographical GPS Registrations

no code implementations12 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.

Clustering

SWMLP: Shared Weight Multilayer Perceptron for Car Trajectory Speed Prediction using Road Topographical Features

no code implementations2 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.

Domain-Aware Augmentations for Unsupervised Online General Continual Learning

no code implementations13 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.

Continual Learning Contrastive Learning

New metrics for analyzing continual learners

no code implementations1 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.

Continual Learning

Contrastive Learning for Online Semi-Supervised General Continual Learning

1 code implementation12 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.

Continual Learning Contrastive Learning +1

FGOT: Graph Distances based on Filters and Optimal Transport

2 code implementations9 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.

DeConFuse : A Deep Convolutional Transform based Unsupervised Fusion Framework

no code implementations9 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.

Deep Convolutional Transform Learning -- Extended version

no code implementations2 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).

BIG-bench Machine Learning Clustering +1

Wasserstein-based Graph Alignment

no code implementations12 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.

Graph Classification

Ultrametric Fitting by Gradient Descent

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.

Clustering

OrthoNet: Multilayer Network Data Clustering

no code implementations2 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.

Clustering Graph Clustering +1

A Random Block-Coordinate Douglas-Rachford Splitting Method with Low Computational Complexity for Binary Logistic Regression

no code implementations25 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.

regression

A Non-Local Structure Tensor Based Approach for Multicomponent Image Recovery Problems

no code implementations21 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.

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