Search Results for author: Hatem Hajri

Found 10 papers, 6 papers with code

Riemannian data-dependent randomized smoothing for neural networks certification

1 code implementation21 Jun 2022 Pol Labarbarie, Hatem Hajri, Marc Arnaudon

Certification of neural networks is an important and challenging problem that has been attracting the attention of the machine learning community since few years.

Noisy Learning for Neural ODEs Acts as a Robustness Locus Widening

no code implementations16 Jun 2022 Martin Gonzalez, Hatem Hajri, Loic Cantat, Mihaly Petreczky

We investigate the problems and challenges of evaluating the robustness of Differential Equation-based (DE) networks against synthetic distribution shifts.

Data Augmentation

Realization Theory Of Recurrent Neural ODEs Using Polynomial System Embeddings

no code implementations24 May 2022 Martin Gonzalez, Thibault Defourneau, Hatem Hajri, Mihaly Petreczky

In this paper we show that neural ODE analogs of recurrent (ODE-RNN) and Long Short-Term Memory (ODE-LSTM) networks can be algorithmically embeddeded into the class of polynomial systems.

Improving Robustness of Deep Reinforcement Learning Agents: Environment Attack based on the Critic Network

2 code implementations7 Apr 2021 Lucas Schott, Hatem Hajri, Sylvain Lamprier

Existing approaches of the literature to generate meaningful disturbances of the environment are adversarial reinforcement learning methods.

Adversarial Attack reinforcement-learning +1

Stochastic sparse adversarial attacks

3 code implementations24 Nov 2020 Manon Césaire, Lucas Schott, Hatem Hajri, Sylvain Lamprier, Patrick Gallinari

This paper introduces stochastic sparse adversarial attacks (SSAA), standing as simple, fast and purely noise-based targeted and untargeted attacks of neural network classifiers (NNC).

Probabilistic Jacobian-based Saliency Maps Attacks

2 code implementations12 Jul 2020 Théo Combey, António Loison, Maxime Faucher, Hatem Hajri

Neural network classifiers (NNCs) are known to be vulnerable to malicious adversarial perturbations of inputs including those modifying a small fraction of the input features named sparse or $L_0$ attacks.

Autonomous Driving Malware Detection

Geomstats: A Python Package for Riemannian Geometry in Machine Learning

1 code implementation ICLR 2019 Nina Miolane, Alice Le Brigant, Johan Mathe, Benjamin Hou, Nicolas Guigui, Yann Thanwerdas, Stefan Heyder, Olivier Peltre, Niklas Koep, Hadi Zaatiti, Hatem Hajri, Yann Cabanes, Thomas Gerald, Paul Chauchat, Christian Shewmake, Bernhard Kainz, Claire Donnat, Susan Holmes, Xavier Pennec

We introduce Geomstats, an open-source Python toolbox for computations and statistics on nonlinear manifolds, such as hyperbolic spaces, spaces of symmetric positive definite matrices, Lie groups of transformations, and many more.

BIG-bench Machine Learning Clustering +2

FRSign: A Large-Scale Traffic Light Dataset for Autonomous Trains

no code implementations5 Feb 2020 Jeanine Harb, Nicolas Rébéna, Raphaël Chosidow, Grégoire Roblin, Roman Potarusov, Hatem Hajri

In the realm of autonomous transportation, there have been many initiatives for open-sourcing self-driving cars datasets, but much less for alternative methods of transportation such as trains.

Self-Driving Cars

From Node Embedding To Community Embedding : A Hyperbolic Approach

2 code implementations2 Jul 2019 Thomas Gerald, Hadi Zaatiti, Hatem Hajri, Nicolas Baskiotis, Olivier Schwander

Considering the success of hyperbolic representations of graph-structured data in last years, an ongoing challenge is to set up a hyperbolic approach for the community detection problem.

Community Detection Graph Embedding

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