Search Results for author: Amedeo Napoli

Found 15 papers, 3 papers with code

Delta-Closure Structure for Studying Data Distribution

no code implementations13 Oct 2022 Aleksey Buzmakov, Tatiana Makhalova, Sergei O. Kuznetsov, Amedeo Napoli

In this paper, we revisit pattern mining and study the distribution underlying a binary dataset thanks to the closure structure which is based on passkeys, i. e., minimum generators in equivalence classes robust to noise.

Reducing Unintended Bias of ML Models on Tabular and Textual Data

no code implementations5 Aug 2021 Guilherme Alves, Maxime Amblard, Fabien Bernier, Miguel Couceiro, Amedeo Napoli

Unintended biases in machine learning (ML) models are among the major concerns that must be addressed to maintain public trust in ML.

Fairness

A Bayesian Convolutional Neural Network for Robust Galaxy Ellipticity Regression

no code implementations20 Apr 2021 Claire Theobald, Bastien Arcelin, Frédéric Pennerath, Brieuc Conan-Guez, Miguel Couceiro, Amedeo Napoli

We show that while a convolutional network can be trained to correctly estimate well calibrated aleatoric uncertainty, -- the uncertainty due to the presence of noise in the images -- it is unable to generate a trustworthy ellipticity distribution when exposed to previously unseen data (i. e. here, blended scenes).

regression

A Bayesian Neural Network based on Dropout Regulation

no code implementations3 Feb 2021 Claire Theobald, Frédéric Pennerath, Brieuc Conan-Guez, Miguel Couceiro, Amedeo Napoli

Bayesian Neural Networks (BNN) have recently emerged in the Deep Learning world for dealing with uncertainty estimation in classification tasks, and are used in many application domains such as astrophysics, autonomous driving... BNN assume a prior over the weights of a neural network instead of point estimates, enabling in this way the estimation of both aleatoric and epistemic uncertainty of the model prediction. Moreover, a particular type of BNN, namely MC Dropout, assumes a Bernoulli distribution on the weights by using Dropout. Several attempts to optimize the dropout rate exist, e. g. using a variational approach. In this paper, we present a new method called "Dropout Regulation" (DR), which consists of automatically adjusting the dropout rate during training using a controller as used in automation. DR allows for a precise estimation of the uncertainty which is comparable to the state-of-the-art while remaining simple to implement.

Autonomous Driving

Mint: MDL-based approach for Mining INTeresting Numerical Pattern Sets

no code implementations30 Nov 2020 Tatiana Makhalova, Sergei O. Kuznetsov, Amedeo Napoli

Pattern mining is well established in data mining research, especially for mining binary datasets.

Subgroup Discovery

Discovering alignment relations with Graph Convolutional Networks: a biomedical case study

1 code implementation11 Nov 2020 Pierre Monnin, Chedy Raïssi, Amedeo Napoli, Adrien Coulet

In this article, we propose to match nodes within a knowledge graph by (i) learning node embeddings with Graph Convolutional Networks such that similar nodes have low distances in the embedding space, and (ii) clustering nodes based on their embeddings, in order to suggest alignment relations between nodes of a same cluster.

Clustering Knowledge Graphs

Making ML models fairer through explanations: the case of LimeOut

no code implementations1 Nov 2020 Guilherme Alves, Vaishnavi Bhargava, Miguel Couceiro, Amedeo Napoli

To illustrate, we will revisit the case of "LimeOut" that was proposed to tackle "process fairness", which measures a model's reliance on sensitive or discriminatory features.

Fairness

Discovery data topology with the closure structure. Theoretical and practical aspects

no code implementations6 Oct 2020 Tatiana Makhalova, Aleksey Buzmakov, Sergei O. Kuznetsov, Amedeo Napoli

The closure structure allows one to understand the topology of the dataset in the whole and the inherent complexity of the data.

LimeOut: An Ensemble Approach To Improve Process Fairness

no code implementations17 Jun 2020 Vaishnavi Bhargava, Miguel Couceiro, Amedeo Napoli

To achieve both, we draw inspiration from "dropout" techniques in neural based approaches, and propose a framework that relies on "feature drop-out" to tackle process fairness.

Decision Making Fairness

Knowledge-Based Matching of $n$-ary Tuples

1 code implementation19 Feb 2020 Pierre Monnin, Miguel Couceiro, Amedeo Napoli, Adrien Coulet

In particular, units should be matched within and across sources, and their level of relatedness should be classified into equivalent, more specific, or similar.

Mining Best Closed Itemsets for Projection-antimonotonic Constraints in Polynomial Time

no code implementations28 Mar 2017 Aleksey Buzmakov, Sergei O. Kuznetsov, Amedeo Napoli

One of the first constraints proposed in pattern mining is support (frequency) of a pattern in a dataset.

Fast Generation of Best Interval Patterns for Nonmonotonic Constraints

no code implementations2 Jun 2015 Aleksey Buzmakov, Sergei O. Kuznetsov, Amedeo Napoli

In this paper we consider stability and $\Delta$-measure, which are nonmonotonic constraints, and apply them to interval tuple datasets.

On mining complex sequential data by means of FCA and pattern structures

no code implementations9 Apr 2015 Aleksey Buzmakov, Elias Egho, Nicolas Jay, Sergei O. Kuznetsov, Amedeo Napoli, Chedy Raïssi

Pattern structures are used for mining complex data (such as sequences or graphs) and are based on a subsumption operation, which in our case is defined with respect to the partial order on sequences.

Marketing

Cannot find the paper you are looking for? You can Submit a new open access paper.