Search Results for author: Florence d'Alché-Buc

Found 30 papers, 10 papers with code

Anomaly component analysis

no code implementations26 Dec 2023 Romain Valla, Pavlo Mozharovskyi, Florence d'Alché-Buc

At the crossway of machine learning and data analysis, anomaly detection aims at identifying observations that exhibit abnormal behaviour.

Anomaly Detection

Fast kernel half-space depth for data with non-convex supports

no code implementations21 Dec 2023 Arturo Castellanos, Pavlo Mozharovskyi, Florence d'Alché-Buc, Hicham Janati

Data depth is a statistical function that generalizes order and quantiles to the multivariate setting and beyond, with applications spanning over descriptive and visual statistics, anomaly detection, testing, etc.

Anomaly Detection Descriptive

Tailoring Mixup to Data using Kernel Warping functions

1 code implementation2 Nov 2023 Quentin Bouniot, Pavlo Mozharovskyi, Florence d'Alché-Buc

Data augmentation is an essential building block for learning efficient deep learning models.

Data Augmentation

Exploiting Edge Features in Graphs with Fused Network Gromov-Wasserstein Distance

no code implementations28 Sep 2023 Junjie Yang, Matthieu Labeau, Florence d'Alché-Buc

Pairwise comparison of graphs is key to many applications in Machine learning ranging from clustering, kernel-based classification/regression and more recently supervised graph prediction.

Tackling Interpretability in Audio Classification Networks with Non-negative Matrix Factorization

no code implementations11 May 2023 Jayneel Parekh, Sanjeel Parekh, Pavlo Mozharovskyi, Gaël Richard, Florence d'Alché-Buc

This paper tackles two major problem settings for interpretability of audio processing networks, post-hoc and by-design interpretation.

Audio Classification

Sketch In, Sketch Out: Accelerating both Learning and Inference for Structured Prediction with Kernels

no code implementations20 Feb 2023 Tamim El Ahmad, Luc Brogat-Motte, Pierre Laforgue, Florence d'Alché-Buc

Surrogate kernel-based methods offer a flexible solution to structured output prediction by leveraging the kernel trick in both input and output spaces.

Structured Prediction

Functional Output Regression with Infimal Convolution: Exploring the Huber and $ε$-insensitive Losses

1 code implementation16 Jun 2022 Alex Lambert, Dimitri Bouche, Zoltan Szabo, Florence d'Alché-Buc

The efficiency of the approach is demonstrated and contrasted with the classical squared loss setting on both synthetic and real-world benchmarks.

regression

Fast Kernel Methods for Generic Lipschitz Losses via $p$-Sparsified Sketches

1 code implementation8 Jun 2022 Tamim El Ahmad, Pierre Laforgue, Florence d'Alché-Buc

Kernel methods are learning algorithms that enjoy solid theoretical foundations while suffering from important computational limitations.

regression valid

Learning to Predict Graphs with Fused Gromov-Wasserstein Barycenters

1 code implementation8 Feb 2022 Luc Brogat-Motte, Rémi Flamary, Céline Brouard, Juho Rousu, Florence d'Alché-Buc

This paper introduces a novel and generic framework to solve the flagship task of supervised labeled graph prediction by leveraging Optimal Transport tools.

regression

A Framework to Learn with Interpretation

1 code implementation NeurIPS 2021 Jayneel Parekh, Pavlo Mozharovskyi, Florence d'Alché-Buc

The interpreter provides both local and global interpretability about the predictive model in terms of human-understandable high level attribute functions, with minimal loss of accuracy.

Attribute Decision Making

Learning Output Embeddings in Structured Prediction

no code implementations29 Jul 2020 Luc Brogat-Motte, Alessandro Rudi, Céline Brouard, Juho Rousu, Florence d'Alché-Buc

A powerful and flexible approach to structured prediction consists in embedding the structured objects to be predicted into a feature space of possibly infinite dimension by means of output kernels, and then, solving a regression problem in this output space.

regression Structured Prediction

When OT meets MoM: Robust estimation of Wasserstein Distance

no code implementations18 Jun 2020 Guillaume Staerman, Pierre Laforgue, Pavlo Mozharovskyi, Florence d'Alché-Buc

Issued from Optimal Transport, the Wasserstein distance has gained importance in Machine Learning due to its appealing geometrical properties and the increasing availability of efficient approximations.

Generative Adversarial Network

Improving Reproducibility in Machine Learning Research (A Report from the NeurIPS 2019 Reproducibility Program)

no code implementations27 Mar 2020 Joelle Pineau, Philippe Vincent-Lamarre, Koustuv Sinha, Vincent Larivière, Alina Beygelzimer, Florence d'Alché-Buc, Emily Fox, Hugo Larochelle

Reproducibility, that is obtaining similar results as presented in a paper or talk, using the same code and data (when available), is a necessary step to verify the reliability of research findings.

BIG-bench Machine Learning

Nonlinear Functional Output Regression: a Dictionary Approach

no code implementations3 Mar 2020 Dimitri Bouche, Marianne Clausel, François Roueff, Florence d'Alché-Buc

Then, in the more general setting of integral losses based on differentiable ground losses, KPL is implemented using first-order optimization for both fully and partially observed output functions.

Dictionary Learning regression

Duality in RKHSs with Infinite Dimensional Outputs: Application to Robust Losses

no code implementations ICML 2020 Pierre Laforgue, Alex Lambert, Luc Brogat-Motte, Florence d'Alché-Buc

Operator-Valued Kernels (OVKs) and associated vector-valued Reproducing Kernel Hilbert Spaces provide an elegant way to extend scalar kernel methods when the output space is a Hilbert space.

regression Representation Learning +1

From the Token to the Review: A Hierarchical Multimodal approach to Opinion Mining

no code implementations IJCNLP 2019 Alexandre Garcia, Pierre Colombo, Slim Essid, Florence d'Alché-Buc, Chloé Clavel

The task of predicting fine grained user opinion based on spontaneous spoken language is a key problem arising in the development of Computational Agents as well as in the development of social network based opinion miners.

Opinion Mining

Functional Isolation Forest

1 code implementation9 Apr 2019 Guillaume Staerman, Pavlo Mozharovskyi, Stephan Clémençon, Florence d'Alché-Buc

For the purpose of monitoring the behavior of complex infrastructures (e. g. aircrafts, transport or energy networks), high-rate sensors are deployed to capture multivariate data, generally unlabeled, in quasi continuous-time to detect quickly the occurrence of anomalies that may jeopardize the smooth operation of the system of interest.

Anomaly Detection

A multimodal movie review corpus for fine-grained opinion mining

1 code implementation26 Feb 2019 Alexandre Garcia, Slim Essid, Florence d'Alché-Buc, Chloé Clavel

We introduce specific categories in order to make the annotation of opinions easier for movie reviews.

Opinion Mining

Autoencoding any Data through Kernel Autoencoders

no code implementations28 May 2018 Pierre Laforgue, Stephan Clémençon, Florence d'Alché-Buc

This paper investigates a novel algorithmic approach to data representation based on kernel methods.

Infinite-Task Learning with RKHSs

no code implementations22 May 2018 Romain Brault, Alex Lambert, Zoltán Szabó, Maxime Sangnier, Florence d'Alché-Buc

A step further consists of learning a continuum of tasks for various loss functions.

Multi-Task Learning

Joint quantile regression in vector-valued RKHSs

no code implementations NeurIPS 2016 Maxime Sangnier, Olivier Fercoq, Florence d'Alché-Buc

Addressing the will to give a more complete picture than an average relationship provided by standard regression, a novel framework for estimating and predicting simultaneously several conditional quantiles is introduced.

Multi-Task Learning regression

Random Fourier Features for Operator-Valued Kernels

no code implementations9 May 2016 Romain Brault, Florence d'Alché-Buc, Markus Heinonen

Devoted to multi-task learning and structured output learning, operator-valued kernels provide a flexible tool to build vector-valued functions in the context of Reproducing Kernel Hilbert Spaces.

Multi-Task Learning Translation

Learning nonparametric differential equations with operator-valued kernels and gradient matching

no code implementations19 Nov 2014 Markus Heinonen, Florence d'Alché-Buc

Modeling dynamical systems with ordinary differential equations implies a mechanistic view of the process underlying the dynamics.

regression

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