Helmholtz machine

Helmholtz machine

The Helmholtz machine is a name used by Geoff Hinton to describe a class of neural networks which learn the hidden structure of a set of data by being trained to create a generative model which can produce the original set of data. The hope is that by learning economical representations of the data, the underlying structure of the generative model should reasonably approximate the hidden structure of the data set. This is an unsupervised learning algorithm.

The networks are characterized by bottom-up and top-down (reentrant) connections between layers of stochastic elements. The "Wake-Sleep" algorithm is an unsupervised learning rule which has been suggested as a means to train the Helmholtz machine.

Helmholtz machines may also be used in applications requiring a supervised learning algorithm (e.g. character recognition, or position-invariant recognition of an object within a field).

References

http://www.cs.utoronto.ca/~hinton/helmholtz.html -- Hinton's papers on Helmholtz machines


Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать курсовую

Look at other dictionaries:

  • Helmholtz, Hermann von — ▪ German scientist and philosopher Introduction original name  Hermann Ludwig Ferdinand Helmholtz  born Aug. 31, 1821, Potsdam, Prussia [Germany] died Sept. 8, 1894, Charlottenburg, Berlin, Ger.  German scientist and philosopher who made… …   Universalium

  • Q-machine — A Q machine is a device that is used in experimental plasma physics. The name Q machine stems from the original intention of creating a quiescent plasma that is free from the fluctuations that are present in plasmas created in electric discharges …   Wikipedia

  • thermodynamics — thermodynamicist, n. /therr moh duy nam iks/, n. (used with a sing. v.) the science concerned with the relations between heat and mechanical energy or work, and the conversion of one into the other: modern thermodynamics deals with the properties …   Universalium

  • The Law of Conservation of Energy —     The Law of Conservation of Energy     † Catholic Encyclopedia ► The Law of Conservation of Energy     Amongst the gravest objections raised by the progress of modern science against Theism, the possibility of Miracles, free will, the… …   Catholic encyclopedia

  • Thermodynamics — Annotated color version of the original 1824 Carnot heat engine showing the hot body (boiler), working body (system, steam), and cold body (water), the letters labeled according to the stopping points in Carnot cycle …   Wikipedia

  • History of electromagnetism — The history of electromagnetism, that is the human understanding and recorded use of electromagnetic forces, dates back over two thousand years ago, see Timeline of electromagnetism. The ancients must have been acquainted with the effects of… …   Wikipedia

  • perception — perceptional, adj. /peuhr sep sheuhn/, n. 1. the act or faculty of apprehending by means of the senses or of the mind; cognition; understanding. 2. immediate or intuitive recognition or appreciation, as of moral, psychological, or aesthetic… …   Universalium

  • PHYSIOLOGIE — Aristote avait nommé «physiologues» les philosophes grecs présocratiques qui avaient proposé une explication générale de la nature des choses par le recours à quelque élément fondamental (eau, air, feu) ou à quelque composition d’éléments. De là …   Encyclopédie Universelle

  • Brave New World — This article is about the novel. For other uses, see Brave New World (disambiguation). Brave New World   …   Wikipedia

  • Psychology (The separation of) from philosophy — The separation of psychology from philosophy Studies in the sciences of mind 1815–1879 Edward S.Reed THE IMPOSSIBLE SCIENCE Traditional metaphysics The consensus of European opinion during and immediately after the Napoleonic era was that… …   History of philosophy

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”