Search Results for author: Roberto Vega

Found 5 papers, 1 papers with code

Modeling and Forecasting COVID-19 Cases using Latent Subpopulations

no code implementations9 Feb 2023 Roberto Vega, Zehra Shah, Pouria Ramazi, Russell Greiner

Here, we propose two new methods to model the number of people infected with COVID-19 over time, each as a linear combination of latent sub-populations -- i. e., when we do not know which person is in which sub-population, and the only available observations are the aggregates across all sub-populations.

Semi-supervised Batch Learning From Logged Data

no code implementations15 Sep 2022 Gholamali Aminian, Armin Behnamnia, Roberto Vega, Laura Toni, Chengchun Shi, Hamid R. Rabiee, Omar Rivasplata, Miguel R. D. Rodrigues

We propose learning methods for problems where feedback is missing for some samples, so there are samples with feedback and samples missing-feedback in the logged data.

counterfactual

Domain-shift adaptation via linear transformations

1 code implementation14 Jan 2022 Roberto Vega, Russell Greiner

A predictor, $f_A : X \to Y$, learned with data from a source domain (A) might not be accurate on a target domain (B) when their distributions are different.

Unsupervised Domain Adaptation

SIMLR: Machine Learning inside the SIR model for COVID-19 Forecasting

no code implementations3 Jun 2021 Roberto Vega, Leonardo Flores, Russell Greiner

Accurate forecasts of the number of newly infected people during an epidemic are critical for making effective timely decisions.

BIG-bench Machine Learning

Sample Efficient Learning of Image-Based Diagnostic Classifiers Using Probabilistic Labels

no code implementations11 Feb 2021 Roberto Vega, Pouneh Gorji, Zichen Zhang, Xuebin Qin, Abhilash Rakkunedeth Hareendranathan, Jeevesh Kapur, Jacob L. Jaremko, Russell Greiner

This complicates its use in tasks like image-based medical diagnosis, where the small training datasets are usually insufficient to learn appropriate data representations.

Medical Diagnosis

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