Search Results for author: Antônio H. Ribeiro

Found 18 papers, 12 papers with code

End-to-end Risk Prediction of Atrial Fibrillation from the 12-Lead ECG by Deep Neural Networks

1 code implementation28 Sep 2023 Theogene Habineza, Antônio H. Ribeiro, Daniel Gedon, Joachim A. Behar, Antonio Luiz P. Ribeiro, Thomas B. Schön

Background: Atrial fibrillation (AF) is one of the most common cardiac arrhythmias that affects millions of people each year worldwide and it is closely linked to increased risk of cardiovascular diseases such as stroke and heart failure.

Decision Making Management

Deep networks for system identification: a Survey

no code implementations30 Jan 2023 Gianluigi Pillonetto, Aleksandr Aravkin, Daniel Gedon, Lennart Ljung, Antônio H. Ribeiro, Thomas B. Schön

For this reason, we provide a survey of deep learning from a system identification perspective.

On Merging Feature Engineering and Deep Learning for Diagnosis, Risk-Prediction and Age Estimation Based on the 12-Lead ECG

no code implementations13 Jul 2022 Eran Zvuloni, Jesse Read, Antônio H. Ribeiro, Antonio Luiz P. Ribeiro, Joachim A. Behar

Conclusion: We found that for traditional 12-lead ECG based diagnosis tasks DL did not yield a meaningful improvement over FE, while it improved significantly the nontraditional regression task.

Age Estimation BIG-bench Machine Learning +5

Surprises in adversarially-trained linear regression

no code implementations25 May 2022 Antônio H. Ribeiro, Dave Zachariah, Thomas B. Schön

We prove that adversarial training with small disturbances gives the solution with the minimum-norm that interpolates the training data.

regression

Automated multilabel diagnosis on electrocardiographic images and signals

no code implementations Nature Communications 2022 Veer Sangha, Bobak J. Mortazavi, Adrian D. Haimovich, Antônio H. Ribeiro, Cynthia A. Brandt, Daniel L. Jacoby, Wade L. Schulz, Harlan M. Krumholz, Antonio Luiz P. Ribeiro & Rohan Khera

The application of artificial intelligence (AI) for automated diagnosis of electrocardiograms (ECGs) can improve care in remote settings but is limited by the reliance on infrequently available signal-based data.

Overparameterized Linear Regression under Adversarial Attacks

no code implementations13 Apr 2022 Antônio H. Ribeiro, Thomas B. Schön

This fact is then exploited to establish similarities between adversarial training and parameter-shrinking methods and to study how the training might affect the robustness of the estimated models.

regression

How Convolutional Neural Networks Deal with Aliasing

1 code implementation15 Feb 2021 Antônio H. Ribeiro, Thomas B. Schön

The convolutional neural network (CNN) remains an essential tool in solving computer vision problems.

Beyond Occam's Razor in System Identification: Double-Descent when Modeling Dynamics

1 code implementation11 Dec 2020 Antônio H. Ribeiro, Johannes N. Hendriks, Adrian G. Wills, Thomas B. Schön

It is typically observed that the model validation performance follows a U-shaped curve as the model complexity increases.

Deep Energy-Based NARX Models

1 code implementation8 Dec 2020 Johannes N. Hendriks, Fredrik K. Gustafsson, Antônio H. Ribeiro, Adrian G. Wills, Thomas B. Schön

This paper is directed towards the problem of learning nonlinear ARX models based on system input--output data.

Deep Convolutional Networks in System Identification

1 code implementation4 Sep 2019 Carl Andersson, Antônio H. Ribeiro, Koen Tiels, Niklas Wahlström, Thomas B. Schön

Recent developments within deep learning are relevant for nonlinear system identification problems.

Beyond exploding and vanishing gradients: analysing RNN training using attractors and smoothness

1 code implementation20 Jun 2019 Antônio H. Ribeiro, Koen Tiels, Luis A. Aguirre, Thomas B. Schön

The exploding and vanishing gradient problem has been the major conceptual principle behind most architecture and training improvements in recurrent neural networks (RNNs) during the last decade.

On the smoothness of nonlinear system identification

1 code implementation2 May 2019 Antônio H. Ribeiro, Koen Tiels, Jack Umenberger, Thomas B. Schön, Luis A. Aguirre

We shed new light on the \textit{smoothness} of optimization problems arising in prediction error parameter estimation of linear and nonlinear systems.

Automatic Diagnosis of Short-Duration 12-Lead ECG using a Deep Convolutional Network

no code implementations28 Nov 2018 Antônio H. Ribeiro, Manoel Horta Ribeiro, Gabriela Paixão, Derick Oliveira, Paulo R. Gomes, Jéssica A. Canazart, Milton Pifano, Wagner Meira Jr., Thomas B. Schön, Antonio Luiz Ribeiro

We present a model for predicting electrocardiogram (ECG) abnormalities in short-duration 12-lead ECG signals which outperformed medical doctors on the 4th year of their cardiology residency.

Electrocardiography (ECG)

Lasso Regularization Paths for NARMAX Models via Coordinate Descent

1 code implementation2 Oct 2017 Antônio H. Ribeiro, Luis A. Aguirre

We propose a new algorithm for estimating NARMAX models with $L_1$ regularization for models represented as a linear combination of basis functions.

Computational Efficiency

"Parallel Training Considered Harmful?": Comparing series-parallel and parallel feedforward network training

1 code implementation21 Jun 2017 Antônio H. Ribeiro, Luis A. Aguirre

Neural network models for dynamic systems can be trained either in parallel or in series-parallel configurations.

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