Search Results for author: Davide Piras

Found 6 papers, 3 papers with code

A representation learning approach to probe for dynamical dark energy in matter power spectra

no code implementations16 Oct 2023 Davide Piras, Lucas Lombriser

We present DE-VAE, a variational autoencoder (VAE) architecture to search for a compressed representation of dynamical dark energy (DE) models in observational studies of the cosmic large-scale structure.

Representation Learning Symbolic Regression

A robust estimator of mutual information for deep learning interpretability

1 code implementation31 Oct 2022 Davide Piras, Hiranya V. Peiris, Andrew Pontzen, Luisa Lucie-Smith, Ningyuan Guo, Brian Nord

We develop the use of mutual information (MI), a well-established metric in information theory, to interpret the inner workings of deep learning models.

Disentanglement

Fast and realistic large-scale structure from machine-learning-augmented random field simulations

2 code implementations16 May 2022 Davide Piras, Benjamin Joachimi, Francisco Villaescusa-Navarro

Producing thousands of simulations of the dark matter distribution in the Universe with increasing precision is a challenging but critical task to facilitate the exploitation of current and forthcoming cosmological surveys.

BIG-bench Machine Learning

Discovering the building blocks of dark matter halo density profiles with neural networks

no code implementations16 Mar 2022 Luisa Lucie-Smith, Hiranya V. Peiris, Andrew Pontzen, Brian Nord, Jeyan Thiyagalingam, Davide Piras

The additional dimension in the representation contains information about the infalling material in the outer profiles of dark matter halos, thus discovering the splashback boundary of halos without prior knowledge of the halos' dynamical history.

Decoder

Towards fast machine-learning-assisted Bayesian posterior inference of microseismic event location and source mechanism

1 code implementation12 Jan 2021 Davide Piras, Alessio Spurio Mancini, Ana M. G. Ferreira, Benjamin Joachimi, Michael P. Hobson

We train a machine learning algorithm on the power spectrum of the recorded pressure wave and show that the trained emulator allows complete and fast event locations for $\textit{any}$ source mechanism.

Bayesian Inference BIG-bench Machine Learning +1

Representation Learning for High-Dimensional Data Collection under Local Differential Privacy

no code implementations23 Oct 2020 Alex Mansbridge, Gregory Barbour, Davide Piras, Michael Murray, Christopher Frye, Ilya Feige, David Barber

In this work, our contributions are two-fold: first, by adapting state-of-the-art techniques from representation learning, we introduce a novel approach to learning LDP mechanisms.

Denoising Representation Learning +1

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