Search Results for author: George Wynne

Found 8 papers, 3 papers with code

Bayes Hilbert Spaces for Posterior Approximation

no code implementations18 Apr 2023 George Wynne

This manuscript studies the application of Bayes Hilbert spaces to the posterior approximation problem.

Grassmann Stein Variational Gradient Descent

1 code implementation7 Feb 2022 Xing Liu, Harrison Zhu, Jean-François Ton, George Wynne, Andrew Duncan

Stein variational gradient descent (SVGD) is a deterministic particle inference algorithm that provides an efficient alternative to Markov chain Monte Carlo.

Dimensionality Reduction

Variational Gaussian Processes: A Functional Analysis View

no code implementations25 Oct 2021 Veit Wild, George Wynne

Variational Gaussian process (GP) approximations have become a standard tool in fast GP inference.

Gaussian Processes regression

Statistical Depth Meets Machine Learning: Kernel Mean Embeddings and Depth in Functional Data Analysis

no code implementations26 May 2021 George Wynne, Stanislav Nagy

Statistical depth is the act of gauging how representative a point is compared to a reference probability measure.

BIG-bench Machine Learning

A Kernel Two-Sample Test for Functional Data

1 code implementation25 Aug 2020 George Wynne, Andrew B. Duncan

We propose a nonparametric two-sample test procedure based on Maximum Mean Discrepancy (MMD) for testing the hypothesis that two samples of functions have the same underlying distribution, using kernels defined on function spaces.

Vocal Bursts Valence Prediction

Maximum likelihood estimation and uncertainty quantification for Gaussian process approximation of deterministic functions

no code implementations29 Jan 2020 Toni Karvonen, George Wynne, Filip Tronarp, Chris. J. Oates, Simo Särkkä

We show that the maximum likelihood estimation of the scale parameter alone provides significant adaptation against misspecification of the Gaussian process model in the sense that the model can become "slowly" overconfident at worst, regardless of the difference between the smoothness of the data-generating function and that expected by the model.

regression Uncertainty Quantification

Convergence Guarantees for Gaussian Process Means With Misspecified Likelihoods and Smoothness

no code implementations29 Jan 2020 George Wynne, François-Xavier Briol, Mark Girolami

In this setting, an important theoretical question of practial relevance is how accurate the Gaussian process approximations will be given the difficulty of the problem, our model and the extent of the misspecification.

Experimental Design Gaussian Processes

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