1 code implementation • 6 Feb 2024 • Raphaël Carpintero Perez, Sébastien da Veiga, Josselin Garnier, Brian Staber
Supervised learning has recently garnered significant attention in the field of computational physics due to its ability to effectively extract complex patterns for tasks like solving partial differential equations, or predicting material properties.
no code implementations • 4 Nov 2022 • Paul Lartaud, Philippe Humbert, Josselin Garnier
For an ill-posed inverse problem the inverse uncertainty quantification is crucial.
1 code implementation • 29 May 2022 • Naoufal Acharki, Ramiro Lugo, Antoine Bertoncello, Josselin Garnier
We consider different meta-learners, and we carry out a theoretical analysis of their error upper bounds as functions of important parameters such as the number of treatment levels, showing that the naive extensions do not always provide satisfactory results.
no code implementations • 9 Sep 2021 • Clement Gauchy, Cyril Feau, Josselin Garnier
The key elements of seismic probabilistic risk assessment studies are the fragility curves which express the probabilities of failure of structures conditional to a seismic intensity measure.
no code implementations • 21 May 2021 • Liliana Borcea, Josselin Garnier
The goal is to estimate the support of the reflectivity function of a remote scene from measurements of the backscattered wave field.
no code implementations • 11 Mar 2021 • Pierre Azam, Adrien Fusaro, Quentin Fontaine, Josselin Garnier, Alberto Bramati, Antonio Picozzi, Robin Kaiser, Quentin Glorieux, Tom Bienaimé
The theoretical analysis based on the method of characteristics reveals the main counterintuitive result that dissipation (photon losses) is responsible for an unexpected enhancement of the collapse instability.
Quantum Gases Pattern Formation and Solitons Optics
no code implementations • 4 Mar 2021 • Josselin Garnier, Jean-Baptiste Gaudemet, Anne Gruz
This paper addresses estimates of climate risk embedded within a bank credit portfolio.
no code implementations • 14 Sep 2020 • Josselin Garnier
We discuss a generalized Helmholtz-Kirchhoff identity that is valid in dispersive media and we characterize the statistical properties of the empirical cross spectral density of the wave field.
no code implementations • 19 Oct 2018 • Josselin Garnier, Knut Solna
It is also shown via numerical simulations that the proposed hedging schemes which derive from option price approximations in the regime of rapid mean reversion, are robust: the `practitioners' delta hedging scheme that is identified as being optimal by our asymptotic analysis when the mean reversion time is small seems to be optimal with arbitrary mean reversion times.