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Institut d'Astrophysique et
de Géophysique (Bât. B5c)
Quartier Agora
Allée du 6 août, 19C
B-4000 Liège 1 (Sart-Tilman)
Belgique
Tel.: 04.366.9779
Fax: 04.366.9729
de Géophysique (Bât. B5c)
Quartier Agora
Allée du 6 août, 19C
B-4000 Liège 1 (Sart-Tilman)
Belgique
Tel.: 04.366.9779
Fax: 04.366.9729
Seminars : Documents
BY DOWNLOADING THIS DOCUMENT,
YOU IMPLICITELY AGREE TO NOT PUBLISH EXTRACTS
WITHOUT PRIOR CONSENT OF THE AUTHOR :
Jesus Torrado, <jesus.torrado@pd.infn.it>
YOU IMPLICITELY AGREE TO NOT PUBLISH EXTRACTS
WITHOUT PRIOR CONSENT OF THE AUTHOR :
Jesus Torrado, <jesus.torrado@pd.infn.it>
Seminar n°2: Thursday 16 february, 16h00
Parameter estimation in Cosmology with Cobaya and Machine-Learning
Jesus Torrado (Padova University)
I will briefly present Cobaya, an inference framework aimed at model pipelines with complex interdependencies between parameters and intermediate quantities, and use it to illustrate some aspects of classic Bayesian inference in Cosmology. Next, I will discuss the effort by me and my collaborators towards a no-pre-training, drop-in replacement for classical parameter inference on very slow posteriors, using a Gaussian Process surrogate model that actively learns the posterior distribution and converges in O(100) fewer evaluations.
Jesus Torrado (Padova University)
I will briefly present Cobaya, an inference framework aimed at model pipelines with complex interdependencies between parameters and intermediate quantities, and use it to illustrate some aspects of classic Bayesian inference in Cosmology. Next, I will discuss the effort by me and my collaborators towards a no-pre-training, drop-in replacement for classical parameter inference on very slow posteriors, using a Gaussian Process surrogate model that actively learns the posterior distribution and converges in O(100) fewer evaluations.
University of Liège >
Faculty of Sciences >
Department of Astrophysics, Geophysics and Oceanography :
CoWebAGO, Juin 2009.