Search Results for author: Anthony Lasenby

Found 9 papers, 7 papers with code

Compromise-free Bayesian neural networks

1 code implementation25 Apr 2020 Kamran Javid, Will Handley, Mike Hobson, Anthony Lasenby

We conduct a thorough analysis of the relationship between the out-of-sample performance and the Bayesian evidence (marginal likelihood) of Bayesian neural networks (BNNs), as well as looking at the performance of ensembles of BNNs, both using the Boston housing dataset.

Bayesian sparse reconstruction: a brute-force approach to astronomical imaging and machine learning

1 code implementation12 Sep 2018 Edward Higson, Will Handley, Michael Hobson, Anthony Lasenby

Our approach can also be readily applied to neural networks, where it allows the network architecture to be determined by the data in a principled Bayesian manner by treating the number of nodes and hidden layers as parameters.

BIG-bench Machine Learning Computational Efficiency +1

Diagnostic Tests for Nested Sampling Calculations

3 code implementations16 Apr 2018 Edward Higson, Will Handley, Mike Hobson, Anthony Lasenby

Nested sampling is an increasingly popular technique for Bayesian computation - in particular for multimodal, degenerate and high-dimensional problems.

Computation Cosmology and Nongalactic Astrophysics Instrumentation and Methods for Astrophysics Data Analysis, Statistics and Probability

Dynamic nested sampling: an improved algorithm for parameter estimation and evidence calculation

2 code implementations11 Apr 2017 Edward Higson, Will Handley, Mike Hobson, Anthony Lasenby

We introduce dynamic nested sampling: a generalisation of the nested sampling algorithm in which the number of "live points" varies to allocate samples more efficiently.

Computation Instrumentation and Methods for Astrophysics Data Analysis, Statistics and Probability Methodology

Sampling Errors in Nested Sampling Parameter Estimation

2 code implementations28 Mar 2017 Edward Higson, Will Handley, Mike Hobson, Anthony Lasenby

Sampling errors in nested sampling parameter estimation differ from those in Bayesian evidence calculation, but have been little studied in the literature.

Methodology Instrumentation and Methods for Astrophysics Applications

BAMBI: blind accelerated multimodal Bayesian inference

2 code implementations13 Oct 2011 Philip Graff, Farhan Feroz, Michael P. Hobson, Anthony Lasenby

In this paper we present an algorithm for rapid Bayesian analysis that combines the benefits of nested sampling and artificial neural networks.

Bayesian Inference

Efficient Computation of CMB anisotropies in closed FRW models

3 code implementations10 Nov 1999 Antony Lewis, Anthony Challinor, Anthony Lasenby

We implement the efficient line of sight method to calculate the anisotropy and polarization of the cosmic microwave background for scalar and tensor modes in almost-Friedmann-Robertson-Walker models with positive spatial curvature.

astro-ph

Cosmic microwave background anisotropies in the CDM model: a covariant and gauge-invariant approach

no code implementations28 Apr 1998 Anthony Challinor, Anthony Lasenby

We present a fully covariant and gauge-invariant calculation of the evolution of anisotropies in the cosmic microwave background (CMB) radiation.

astro-ph

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