Search Results for author: Oscar Key

Found 9 papers, 7 papers with code

Towards Healing the Blindness of Score Matching

no code implementations15 Sep 2022 Mingtian Zhang, Oscar Key, Peter Hayes, David Barber, Brooks Paige, François-Xavier Briol

Score-based divergences have been widely used in machine learning and statistics applications.

Density Estimation

Composite Goodness-of-fit Tests with Kernels

1 code implementation19 Nov 2021 Oscar Key, Arthur Gretton, François-Xavier Briol, Tamara Fernandez

Model misspecification can create significant challenges for the implementation of probabilistic models, and this has led to development of a range of robust methods which directly account for this issue.

On Feature Collapse and Deep Kernel Learning for Single Forward Pass Uncertainty

2 code implementations22 Feb 2021 Joost van Amersfoort, Lewis Smith, Andrew Jesson, Oscar Key, Yarin Gal

Inducing point Gaussian process approximations are often considered a gold standard in uncertainty estimation since they retain many of the properties of the exact GP and scale to large datasets.

Gaussian Processes General Classification

Variational Deterministic Uncertainty Quantification

no code implementations1 Jan 2021 Joost van Amersfoort, Lewis Smith, Andrew Jesson, Oscar Key, Yarin Gal

Building on recent advances in uncertainty quantification using a single deep deterministic model (DUQ), we introduce variational Deterministic Uncertainty Quantification (vDUQ).

Causal Inference regression +1

On Signal-to-Noise Ratio Issues in Variational Inference for Deep Gaussian Processes

1 code implementation1 Nov 2020 Tim G. J. Rudner, Oscar Key, Yarin Gal, Tom Rainforth

We show that the gradient estimates used in training Deep Gaussian Processes (DGPs) with importance-weighted variational inference are susceptible to signal-to-noise ratio (SNR) issues.

Gaussian Processes Variational Inference

Interlocking Backpropagation: Improving depthwise model-parallelism

1 code implementation8 Oct 2020 Aidan N. Gomez, Oscar Key, Kuba Perlin, Stephen Gou, Nick Frosst, Jeff Dean, Yarin Gal

Motivated by poor resource utilisation in the global setting and poor task performance in the local setting, we introduce a class of intermediary strategies between local and global learning referred to as interlocking backpropagation.

Image Classification

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