Practical Variational Inference for Neural Networks

author: Alex Graves, University of Toronto
published: Sept. 6, 2012,   recorded: December 2011,   views: 4819
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Description

Variational methods have been previously explored as a tractable approximation to Bayesian inference for neural networks. However the approaches proposed so far have only been applicable to a few simple network architectures. This paper introduces an easy-to-implement stochastic variational method (or equivalently, minimum description length loss function) that can be applied to most neural networks. Along the way it revisits several common regularisers from a variational perspective. It also provides a simple pruning heuristic that can both drastically reduce the number of network weights and lead to improved generalisation. Experimental results are provided for a hierarchical multidimensional recurrent neural network applied to the TIMIT speech corpus.

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Download slides icon Download slides: nips2011_graves_networks_01.pdf (83.9 KB)

Download article icon Download article: nips2011_1263.pdf (427.9 KB)


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