[Lisa_seminaires] Fwd: UdeM-McGill-MITACS machine learning seminar Wed July 20th @ 14h00, AA3195

Guillaume Desjardins guillaume.desjardins at gmail.com
Mar 19 Juil 21:23:14 EDT 2011


A reminder for tomorrow's MITACs talk by Hugo Larochelle. See you there !

---------- Forwarded message ----------
From: Guillaume Desjardins <guillaume.desjardins at gmail.com>
Date: Fri, Jul 15, 2011 at 5:31 PM
Subject: UdeM-McGill-MITACS machine learning seminar Wed July 20th @ 14h00,
AA3195
To: lisa_seminaires at iro.umontreal.ca


A UdeM-McGill-MITACS machine learning seminar will be held this Wesdnesday,
July 20th. The talk given by Hugo Larochelle, will take place from
14h00-15h00 in the room AA3195 (pavillon Andre-Aisenstadt, click
here<http://maps.google.ca/maps?q=2920,+chemin+de+la+tour&hl=en&z=16&iwloc=A>
for
directions) at the Université de Montréal. Hope to see you there !

Title: Restricted Boltzmann Machines with Structure: Two Extensions

Abstract:

In this talk, I'll describe two extensions of the restricted Boltzmann
machine to classification problems that exhibit more structure than the
standard setting with "input vector / target class index" pairs.

In the first extension, we'll consider the problem of classification when
inputs correspond to sets of vectors. This setting occurs in many problems
such as the classification of pieces of mail containing several pages, of web
sites with several sections or of images that have been pre-segmented into
smaller regions. I'll describe generalizations of the restricted Boltzmann
machine (RBM) that are appropriate in this context and explore how to
incorporate different assumptions about the relationship between the input
sets and the target class within the RBM.

In the second extension, we'll look at the problem of structured output
(target) prediction with an RBM. I'll discuss how contrastive divergence
(CD) is not appropriate in this setting and describe two new learning
algorithms that improve on CD.

The first extension is joint work with Jérôme Louradour, and the second
extension is joint work with Volodymyr Mnih and Geoffrey Hinton.

--
Guillaume Desjardins
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