Generation and Simulation of Synthetic Datasets with Copulas

no code implementations • 30 Mar 2022 • Regis Houssou, Mihai-Cezar Augustin, Efstratios Rappos, Vivien Bonvin, Stephan Robert-Nicoud

This paper proposes a new method to generate synthetic data sets based on copula models.

Radial Autoencoders for Enhanced Anomaly Detection

no code implementations • 29 Mar 2022 • Mihai-Cezar Augustin, Vivien Bonvin, Regis Houssou, Efstratios Rappos, Stephan Robert-Nicoud

We expect that centric autoencoders will become irreplaceable objects in anomaly live detection based on geometry, thanks to their ability to stem naturally on geometrical algorithms and to their native capability of detecting unknown anomaly types.

Anomaly Detection Classification +1

Cosmic dissonance: new physics or systematics behind a short sound horizon?

1 code implementation • 17 Sep 2019 • Nikki Arendse, Radosław J. Wojtak, Adriano Agnello, Geoff C. -F. Chen, Christopher D. Fassnacht, Dominique Sluse, Stefan Hilbert, Martin Millon, Vivien Bonvin, Kenneth C. Wong, Frédéric Courbin, Sherry H. Suyu, Simon Birrer, Tommaso Treu, Leon V. E. Koopmans

Results from time-delay lenses are consistent with those from distance-ladder calibrations and point to a discrepancy between absolute distance scales measured from the CMB (assuming the standard cosmological model) and late-time observations.

Cosmology and Nongalactic Astrophysics