Search Results for author: Matias Vera

Found 7 papers, 2 papers with code

On the Stability of a non-hyperbolic nonlinear map with non-bounded set of non-isolated fixed points with applications to Machine Learning

1 code implementation5 Jan 2024 Roberta Hansen, Matias Vera, Lautaro Estienne, Luciana Ferrer, Pablo Piantanida

This paper deals with the convergence analysis of the SUCPA (Semi Unsupervised Calibration through Prior Adaptation) algorithm, defined from a first-order non-linear difference equations, first developed to correct the scores output by a supervised machine learning classifier.

Binary Classification Image Classification +3

Invariant Representations in Deep Learning for Optoacoustic Imaging

no code implementations29 Apr 2023 Matias Vera, Martin G. Gonzalez, Leonardo Rey Vega

Image reconstruction in optoacoustic tomography (OAT) is a trending learning task highly dependent on measured physical magnitudes present at sensing time.

Image Reconstruction Out-of-Distribution Generalization

Cross-domain Sentiment Classification in Spanish

no code implementations15 Mar 2023 Lautaro Estienne, Matias Vera, Leonardo Rey Vega

In this work we perform a study on the ability of a classification system trained with a large database of product reviews to generalize to different Spanish domains.

Classification Sentiment Analysis +1

PACMAN: PAC-style bounds accounting for the Mismatch between Accuracy and Negative log-loss

no code implementations10 Dec 2021 Matias Vera, Leonardo Rey Vega, Pablo Piantanida

In this work, we introduce an analysis based on point-wise PAC approach over the generalization gap considering the mismatch of testing based on the accuracy metric and training on the negative log-loss.

The Role of Mutual Information in Variational Classifiers

no code implementations22 Oct 2020 Matias Vera, Leonardo Rey Vega, Pablo Piantanida

In practice, this behaviour is controlled by various--sometimes heuristics--regularization techniques, which are motivated by developing upper bounds to the generalization error.

Variational Inference

Understanding the Behaviour of the Empirical Cross-Entropy Beyond the Training Distribution

no code implementations28 May 2019 Matias Vera, Pablo Piantanida, Leonardo Rey Vega

Our main result is that the testing gap between the empirical cross-entropy and its statistical expectation (measured with respect to the testing probability law) can be bounded with high probability by the mutual information between the input testing samples and the corresponding representations, generated by the encoder obtained at training time.

Learning Theory

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