Search Results for author: Alexandre Réfrégier

Found 4 papers, 1 papers with code

Cosmological N-body simulations: a challenge for scalable generative models

1 code implementation15 Aug 2019 Nathanaël Perraudin, Ankit Srivastava, Aurelien Lucchi, Tomasz Kacprzak, Thomas Hofmann, Alexandre Réfrégier

Our results show that the proposed model produces samples of high visual quality, although the statistical analysis reveals that capturing rare features in the data poses significant problems for the generative models.

Fast cosmic web simulations with generative adversarial networks

no code implementations27 Jan 2018 Andres C. Rodriguez, Tomasz Kacprzak, Aurelien Lucchi, Adam Amara, Raphael Sgier, Janis Fluri, Thomas Hofmann, Alexandre Réfrégier

Computational models of the underlying physical processes, such as classical N-body simulations, are extremely resource intensive, as they track the action of gravity in an expanding universe using billions of particles as tracers of the cosmic matter distribution.

Accelerating Approximate Bayesian Computation with Quantile Regression: Application to Cosmological Redshift Distributions

no code implementations24 Jul 2017 Tomasz Kacprzak, Jörg Herbel, Adam Amara, Alexandre Réfrégier

This model is trained on a small number of simulations and estimates which regions of the prior space are likely to be accepted into the posterior.

regression

Cosmological model discrimination with Deep Learning

no code implementations17 Jul 2017 Jorit Schmelzle, Aurelien Lucchi, Tomasz Kacprzak, Adam Amara, Raphael Sgier, Alexandre Réfrégier, Thomas Hofmann

We find that our implementation of DCNN outperforms the skewness and kurtosis statistics, especially for high noise levels.

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