Search Results for author: Freddy Bouchet

Found 5 papers, 2 papers with code

Extreme heatwave sampling and prediction with analog Markov chain and comparisons with deep learning

no code implementations18 Jul 2023 George Miloshevich, Dario Lucente, Pascal Yiou, Freddy Bouchet

In addition, we show that the SWG emulator trained on 80 years of data is capable of estimating extreme return times of order of thousands of years for heatwaves longer than several days more precisely than the fit based on generalised extreme value distribution.

Dimensionality Reduction

Probabilistic forecasts of extreme heatwaves using convolutional neural networks in a regime of lack of data

2 code implementations1 Aug 2022 George Miloshevich, Bastien Cozian, Patrice Abry, Pierre Borgnat, Freddy Bouchet

The main scientific message is that most of the time, training neural networks for predicting extreme heatwaves occurs in a regime of lack of data.

Transfer Learning

Deep Learning-based Extreme Heatwave Forecast

no code implementations17 Mar 2021 Valérian Jacques-Dumas, Francesco Ragone, Pierre Borgnat, Patrice Abry, Freddy Bouchet

The present work explores the use of deep learning architectures, trained using outputs of a climate model, as an alternative strategy to forecast the occurrence of extreme long-lasting heatwaves.

Transfer Learning

Dynamical large deviations for plasmas below the Debye length and the Landau equation

no code implementations12 Jan 2021 Ouassim Feliachi, Freddy Bouchet

We obtain a large deviation Hamiltonian that describes fluctuations and rare excursions of the empirical density, in the large plasma parameter limit.

Statistical Mechanics Chaotic Dynamics Plasma Physics

Numerical study of extreme mechanical force exerted by a turbulent flow on a bluff body by direct and rare-event sampling techniques

1 code implementation19 May 2020 Thibault Lestang, Freddy Bouchet, Emmanuel Lévêque

While the AMS algorithm does not yield significant run-time savings as compared to direct sampling, the GKTL algorithm appears to be effective to sample very efficiently extreme fluctuations of the time-averaged drag and estimate related statistics such as return times.

Computational Physics Fluid Dynamics

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