Quelques difficult�s de l�approche psychoth�rapique en m�decine psychosomatique

Schneider, P.-B.

doi:10.1159/000386551

Cited by 1 publication

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“…The main difficulty here is the very large number of simulations that might be required to determine covariances at the accuracy needed as well as the uncertainties due to different cosmological inputs. Some early work in tackling these questions via emulation has been carried out by Schneider et al (2008). Morrison & Schneider (2013) focus in particular on the question of cosmology dependence and emulation, basing their analysis on a halo model approach.…”

Section: Simulation Campaignsmentioning

confidence: 99%

The Mira–titan Universe: Precision Predictions for Dark Energy Surveys

Heitmann

Bingham

Lawrence

et al. 2016

ApJ

145

147

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Ground and space-based sky surveys enable powerful cosmological probes based on measurements of galaxy properties and the distribution of galaxies in the Universe. These probes include weak lensing, baryon acoustic oscillations, abundance of galaxy clusters, and redshift space distortions; they are essential to improving our knowledge of the nature of dark energy. On the theory and modeling front, large-scale simulations of cosmic structure formation play an important role in interpreting the observations and in the challenging task of extracting cosmological physics at the needed precision. These simulations must cover a parameter range beyond the standard six cosmological parameters and need to be run at high mass and force resolution. One key simulationbased task is the generation of accurate theoretical predictions for observables, via the method of emulation. Using a new sampling technique, we explore an 8-dimensional parameter space including massive neutrinos and a variable dark energy equation of state. We construct trial emulators using two surrogate models (the linear power spectrum and an approximate halo mass function). The new sampling method allows us to build precision emulators from just 26 cosmological models and to increase the emulator accuracy by adding new sets of simulations in a prescribed way. This allows emulator fidelity to be systematically improved as new observational data becomes available and higher accuracy is required. Finally, using one ΛCDM cosmology as an example, we study the demands imposed on a simulation campaign to achieve the required statistics and accuracy when building emulators for dark energy investigations. Subject headings: methods: statistical -cosmology: large-scale structure of the universe

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Section: Simulation Campaignsmentioning

confidence: 99%