Search Results for author: Gabriel P. Langlois

Found 4 papers, 0 papers with code

Efficient first-order algorithms for large-scale, non-smooth maximum entropy models with application to wildfire science

no code implementations11 Mar 2024 Gabriel P. Langlois, Jatan Buch, Jérôme Darbon

State-of-the-art algorithms for Maxent models, however, were not originally designed to handle big data sets; these algorithms either rely on technical devices that may yield unreliable numerical results, scale poorly, or require smoothness assumptions that many practical Maxent models lack.

Efficient and robust high-dimensional sparse logistic regression via nonlinear primal-dual hybrid gradient algorithms

no code implementations30 Nov 2021 Jérôme Darbon, Gabriel P. Langlois

Since modern big data sets can contain hundreds of thousands to billions of predictor variables, variable selection methods depend on efficient and robust optimization algorithms to perform well.

regression Variable Selection

Accelerated nonlinear primal-dual hybrid gradient methods with applications to supervised machine learning

no code implementations24 Sep 2021 Jérôme Darbon, Gabriel P. Langlois

To address this issue, we introduce accelerated nonlinear PDHG methods that achieve an optimal convergence rate with stepsize parameters that are simple and efficient to compute.

BIG-bench Machine Learning

Connecting Hamilton--Jacobi partial differential equations with maximum a posteriori and posterior mean estimators for some non-convex priors

no code implementations22 Apr 2021 Jérôme Darbon, Gabriel P. Langlois, Tingwei Meng

In [23, 26], connections between these optimization problems and (multi-time) Hamilton--Jacobi partial differential equations have been proposed under the convexity assumptions of both the data fidelity and regularization terms.

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