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Geoffrey Roeder

4 accepted papers

2020

Learning Composable Energy Surrogates for PDE Order Reduction

NeurIPS 2020oral

Meta-materials are an important emerging class of engineered materials in which complex macroscopic behaviour--whether electromagnetic, thermal, or mechanical--arises from modular substructure. Simulation and optimization of these materials are computationally challenging, as rich substructures nece…

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2019

Efficient Amortised Bayesian Inference for Hierarchical and Nonlinear Dynamical Systems

ICML 2019oral

We introduce a flexible, scalable Bayesian inference framework for nonlinear dynamical systems characterised by distinct and hierarchical variability at the individual, group, and population levels. Our model class is a generalisation of nonlinear mixed-effects (NLME) dynamical systems, the statisti…

2017

Sticking the Landing: Simple, Lower-Variance Gradient Estimators for Variational Inference

NeurIPS 2017poster

We propose a simple and general variant of the standard reparameterized gradient estimator for the variational evidence lower bound. Specifically, we remove a part of the total derivative with respect to the variational parameters that corresponds to the score function. Removing this term produces a…