Search Results for author: Josselin Garnier

Found 9 papers, 2 papers with code

Gaussian process regression with Sliced Wasserstein Weisfeiler-Lehman graph kernels

1 code implementation6 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.

Graph Classification Graph Regression +1

Comparison of meta-learners for estimating multi-valued treatment heterogeneous effects

1 code implementation29 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.

BIG-bench Machine Learning Causal Inference +2

Importance sampling based active learning for parametric seismic fragility curve estimation

no code implementations9 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.

Active Learning Experimental Design

Imaging in random media by two-point coherent interferometry

no code implementations21 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.

Retrieval Vocal Bursts Valence Prediction

Dissipation-enhanced collapse singularity of a nonlocal fluid of light in a hot atomic vapor

no code implementations11 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

The Climate Extended Risk Model (CERM)

no code implementations4 Mar 2021 Josselin Garnier, Jean-Baptiste Gaudemet, Anne Gruz

This paper addresses estimates of climate risk embedded within a bank credit portfolio.

Passive communication with ambient noise

no code implementations14 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.

valid

Optimal hedging under fast-varying stochastic volatility

no code implementations19 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.

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