Search Results for author: Andrew Warrington

Found 9 papers, 6 papers with code

Simplified State Space Layers for Sequence Modeling

4 code implementations9 Aug 2022 Jimmy T. H. Smith, Andrew Warrington, Scott W. Linderman

Models using structured state space sequence (S4) layers have achieved state-of-the-art performance on long-range sequence modeling tasks.

Computational Efficiency ListOps +4

SIXO: Smoothing Inference with Twisted Objectives

1 code implementation13 Jun 2022 Dieterich Lawson, Allan Raventós, Andrew Warrington, Scott Linderman

Sequential Monte Carlo (SMC) is an inference algorithm for state space models that approximates the posterior by sampling from a sequence of target distributions.

Density Ratio Estimation

Robust Asymmetric Learning in POMDPs

1 code implementation31 Dec 2020 Andrew Warrington, J. Wilder Lavington, Adam Ścibior, Mark Schmidt, Frank Wood

Policies for partially observed Markov decision processes can be efficiently learned by imitating policies for the corresponding fully observed Markov decision processes.

Imitation Learning

Planning as Inference in Epidemiological Models

1 code implementation30 Mar 2020 Frank Wood, Andrew Warrington, Saeid Naderiparizi, Christian Weilbach, Vaden Masrani, William Harvey, Adam Scibior, Boyan Beronov, John Grefenstette, Duncan Campbell, Ali Nasseri

In this work we demonstrate how to automate parts of the infectious disease-control policy-making process via performing inference in existing epidemiological models.

Probabilistic Programming

Coping With Simulators That Don't Always Return

1 code implementation28 Mar 2020 Andrew Warrington, Saeid Naderiparizi, Frank Wood

Deterministic models are approximations of reality that are easy to interpret and often easier to build than stochastic alternatives.

Computational Efficiency

Coping With Simulators That Don’t Always Return

no code implementations pproximateinference AABI Symposium 2019 Andrew Warrington, Saeid Naderiparizi, Frank Wood

Deterministic models are approximations of reality that are often easier to build and interpret than stochastic alternatives.

Computational Efficiency

The Virtual Patch Clamp: Imputing C. elegans Membrane Potentials from Calcium Imaging

no code implementations NeurIPS Workshop Neuro_AI 2019 Andrew Warrington, Arthur Spencer, Frank Wood

We develop a stochastic whole-brain and body simulator of the nematode roundworm Caenorhabditis elegans (C. elegans) and show that it is sufficiently regularizing to allow imputation of latent membrane potentials from partial calcium fluorescence imaging observations.

Imputation

Updating the VESICLE-CNN Synapse Detector

1 code implementation31 Oct 2017 Andrew Warrington, Frank Wood

The original implementation makes use of a patch-based approach.

On Nesting Monte Carlo Estimators

no code implementations ICML 2018 Tom Rainforth, Robert Cornish, Hongseok Yang, Andrew Warrington, Frank Wood

Many problems in machine learning and statistics involve nested expectations and thus do not permit conventional Monte Carlo (MC) estimation.

Experimental Design

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