Search Results for author: Mokhtar Z. Alaya

Found 12 papers, 5 papers with code

Gaussian-Smoothed Sliced Probability Divergences

no code implementations4 Apr 2024 Mokhtar Z. Alaya, Alain Rakotomamonjy, Maxime Berar, Gilles Gasso

We particularly focus on the Gaussian smoothed sliced Wasserstein distance and prove that it converges with a rate $O(n^{-1/2})$.

Domain Adaptation Privacy Preserving

Adversarial Semi-Supervised Domain Adaptation for Semantic Segmentation: A New Role for Labeled Target Samples

no code implementations12 Dec 2023 Marwa Kechaou, Mokhtar Z. Alaya, Romain Hérault, Gilles Gasso

Adversarial learning baselines for domain adaptation (DA) approaches in the context of semantic segmentation are under explored in semi-supervised framework.

Domain Adaptation Semantic Segmentation +1

Statistical and Topological Properties of Gaussian Smoothed Sliced Probability Divergences

no code implementations20 Oct 2021 Alain Rakotomamonjy, Mokhtar Z. Alaya, Maxime Berar, Gilles Gasso

In this paper, we analyze the theoretical properties of this distance as well as those of generalized versions denoted as Gaussian smoothed sliced divergences.

Domain Adaptation Privacy Preserving

Heterogeneous Wasserstein Discrepancy for Incomparable Distributions

no code implementations4 Jun 2021 Mokhtar Z. Alaya, Gilles Gasso, Maxime Berar, Alain Rakotomamonjy

We provide a theoretical analysis of this new divergence, called $\textit{heterogeneous Wasserstein discrepancy (HWD)}$, and we show that it preserves several interesting properties including rotation-invariance.

Open Set Domain Adaptation using Optimal Transport

no code implementations2 Oct 2020 Marwa Kechaou, Romain Hérault, Mokhtar Z. Alaya, Gilles Gasso

We present a 2-step optimal transport approach that performs a mapping from a source distribution to a target distribution.

Domain Adaptation

Optimal Transport for Conditional Domain Matching and Label Shift

1 code implementation15 Jun 2020 Alain Rakotomamonjy, Rémi Flamary, Gilles Gasso, Mokhtar Z. Alaya, Maxime Berar, Nicolas Courty

We address the problem of unsupervised domain adaptation under the setting of generalized target shift (joint class-conditional and label shifts).

Unsupervised Domain Adaptation

Theoretical Guarantees for Bridging Metric Measure Embedding and Optimal Transport

no code implementations19 Feb 2020 Mokhtar Z. Alaya, Maxime Bérar, Gilles Gasso, Alain Rakotomamonjy

Unlike Gromov-Wasserstein (GW) distance which compares pairwise distances of elements from each distribution, we consider a method allowing to embed the metric measure spaces in a common Euclidean space and compute an optimal transport (OT) on the embedded distributions.

Partial Optimal Transport with Applications on Positive-Unlabeled Learning

3 code implementations19 Feb 2020 Laetitia Chapel, Mokhtar Z. Alaya, Gilles Gasso

In this paper, we address the partial Wasserstein and Gromov-Wasserstein problems and propose exact algorithms to solve them.

Binacox: automatic cut-point detection in high-dimensional Cox model with applications in genetics

1 code implementation25 Jul 2018 Simon Bussy, Mokhtar Z. Alaya, Anne-Sophie Jannot, Agathe Guilloux

We introduce the binacox, a prognostic method to deal with the problem of detecting multiple cut-points per features in a multivariate setting where a large number of continuous features are available.

feature selection Survival Analysis

Collective Matrix Completion

1 code implementation24 Jul 2018 Mokhtar Z. Alaya, Olga Klopp

Usually in matrix completion a single matrix is considered, which can be, for example, a rating matrix in recommendation system.

Matrix Completion

Binarsity: a penalization for one-hot encoded features in linear supervised learning

no code implementations24 Mar 2017 Mokhtar Z. Alaya, Simon Bussy, Stéphane Gaïffas, Agathe Guilloux

In each group of binary features coming from the one-hot encoding of a single raw continuous feature, this penalization uses total-variation regularization together with an extra linear constraint.

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