CUED Publications database

Uncertainty Decomposition in Bayesian Neural Networks with Latent Variables

Depeweg, S and Hernández-Lobato, JM and Doshi-Velez, F and Udluft, S Uncertainty Decomposition in Bayesian Neural Networks with Latent Variables. (Unpublished)

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Abstract

Bayesian neural networks (BNNs) with latent variables are probabilistic models which can automatically identify complex stochastic patterns in the data. We describe and study in these models a decomposition of predictive uncertainty into its epistemic and aleatoric components. First, we show how such a decomposition arises naturally in a Bayesian active learning scenario by following an information theoretic approach. Second, we use a similar decomposition to develop a novel risk sensitive objective for safe reinforcement learning (RL). This objective minimizes the effect of model bias in environments whose stochastic dynamics are described by BNNs with latent variables. Our experiments illustrate the usefulness of the resulting decomposition in active learning and safe RL settings.

Item Type: Article
Uncontrolled Keywords: stat.ML stat.ML
Subjects: UNSPECIFIED
Divisions: Div F > Computational and Biological Learning
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:54
Last Modified: 18 Jul 2017 08:51
DOI: