Search Results for author: Iñigo Urteaga

Found 11 papers, 8 papers with code

A Coreset-based, Tempered Variational Posterior for Accurate and Scalable Stochastic Gaussian Process Inference

no code implementations2 Nov 2023 Mert Ketenci, Adler Perotte, Noémie Elhadad, Iñigo Urteaga

We present a novel stochastic variational Gaussian process ($\mathcal{GP}$) inference method, based on a posterior over a learnable set of weighted pseudo input-output points (coresets).

Stochastic Optimization

Multi-armed bandits for resource efficient, online optimization of language model pre-training: the use case of dynamic masking

1 code implementation24 Mar 2022 Iñigo Urteaga, Moulay-Zaïdane Draïdia, Tomer Lancewicki, Shahram Khadivi

We propose a multi-armed bandit framework for the sequential selection of TLM pre-training hyperparameters, aimed at optimizing language model performance, in a resource efficient manner.

Bayesian Optimization Decision Making +3

A generative, predictive model for menstrual cycle lengths that accounts for potential self-tracking artifacts in mobile health data

1 code implementation24 Feb 2021 Kathy Li, Iñigo Urteaga, Amanda Shea, Virginia J. Vitzthum, Chris H. Wiggins, Noémie Elhadad

Our model offers several advantages: 1) accounting explicitly for self-tracking artifacts yields better prediction accuracy as likelihood of skipping increases; 2) because it is a generative model, predictions can be updated online as a given cycle evolves, and we can gain interpretable insight into how these predictions change over time; and 3) its hierarchical nature enables modeling of an individual's cycle length history while incorporating population-level information.

Multi-Task Gaussian Processes and Dilated Convolutional Networks for Reconstruction of Reproductive Hormonal Dynamics

1 code implementation27 Aug 2019 Iñigo Urteaga, Tristan Bertin, Theresa M. Hardy, David J. Albers, Noémie Elhadad

We present an end-to-end statistical framework for personalized, accurate, and minimally invasive modeling of female reproductive hormonal patterns.

Gaussian Processes

Phenotyping Endometriosis through Mixed Membership Models of Self-Tracking Data

no code implementations6 Nov 2018 Iñigo Urteaga, Mollie McKillop, Sharon Lipsky-Gorman, Noémie Elhadad

We investigate the use of self-tracking data and unsupervised mixed-membership models to phenotype endometriosis.

Nonparametric Gaussian Mixture Models for the Multi-Armed Bandit

1 code implementation8 Aug 2018 Iñigo Urteaga, Chris H. Wiggins

The proposed Bayesian nonparametric mixture model Thompson sampling sequentially learns the reward model that best approximates the true, yet unknown, per-arm reward distribution, achieving successful regret performance.

Density Estimation Multi-Armed Bandits +1

Sequential Monte Carlo Bandits

1 code implementation8 Aug 2018 Iñigo Urteaga, Chris H. Wiggins

We here utilize SMC for estimation of the statistics Bayesian MAB agents compute, and devise flexible policies that can address a rich class of bandit problems: i. e., MABs with nonlinear, stateless- and context-dependent reward distributions that evolve over time.

Decision Making Thompson Sampling

Towards Personalized Modeling of the Female Hormonal Cycle: Experiments with Mechanistic Models and Gaussian Processes

1 code implementation30 Nov 2017 Iñigo Urteaga, David J. Albers, Marija Vlajic Wheeler, Anna Druet, Hans Raffauf, Noémie Elhadad

The motivation for this work is to model the hormonal cycle and predict its phases in time, both for healthy individuals and for those with disorders of the reproductive system.

Gaussian Processes

Variational inference for the multi-armed contextual bandit

1 code implementation10 Sep 2017 Iñigo Urteaga, Chris H. Wiggins

One general class of algorithms for optimizing interactions with the world, while simultaneously learning how the world operates, is the multi-armed bandit setting and, in particular, the contextual bandit case.

Multi-Armed Bandits Thompson Sampling +1

Bayesian bandits: balancing the exploration-exploitation tradeoff via double sampling

1 code implementation10 Sep 2017 Iñigo Urteaga, Chris H. Wiggins

Reinforcement learning studies how to balance exploration and exploitation in real-world systems, optimizing interactions with the world while simultaneously learning how the world operates.

Thompson Sampling

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