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Oscar Key

4 accepted papers

2023

No Train No Gain: Revisiting Efficient Training Algorithms For Transformer-based Language Models

NeurIPS 2023poster

The computation necessary for training Transformer-based language models has skyrocketed in recent years. This trend has motivated research on efficient training algorithms designed to improve training, validation, and downstream performance faster than standard training. In this work, we revisit th…

2023

Optimally-weighted Estimators of the Maximum Mean Discrepancy for Likelihood-Free Inference

ICML 2023poster

Likelihood-free inference methods typically make use of a distance between simulated and real data. A common example is the maximum mean discrepancy (MMD), which has previously been used for approximate Bayesian computation, minimum distance estimation, generalised Bayesian inference, and within the…

2021

Generating Interpretable Counterfactual Explanations By Implicit Minimisation of Epistemic and Aleatoric Uncertainties

AISTATS 2021poster

Counterfactual explanations (CEs) are a practical tool for demonstrating why machine learning classifiers make particular decisions. For CEs to be useful, it is important that they are easy for users to interpret. Existing methods for generating interpretable CEs rely on auxiliary generative models,…

2021

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

ICML 2021spotlight

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. Specifically, we show both theoretically and via an extensive empirical evaluation that the SNR of the gradient es…