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Neural networks and physical systems with emergent collective computational abilities

Hopfield, J. J. (1982) Neural networks and physical systems with emergent collective computational abilities. Proceedings of the National Academy of Sciences of the United States of America, 79 (8). pp. 2554-2558. ISSN 0027-8424. http://resolver.caltech.edu/CaltechAUTHORS:HOPpnas82

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Abstract

Computational properties of use to biological organisms or to the construction of computers can emerge as collective properties of systems having a large number of simple equivalent components (or neurons). The physical meaning of content-addressable memory is described by an appropriate phase space flow of the state of a system. A model of such a system is given, based on aspects of neurobiology but readily adapted to integrated circuits. The collective properties of this model produce a content-addressable memory which correctly yields an entire memory from any subpart of sufficient size. The algorithm for the time evolution of the state of the system is based on asynchronous parallel processing. Additional emergent collective properties include some capacity for generalization, familiarity recognition, categorization, error correction, and time sequence retention. The collective properties are only weakly sensitive to details of the modeling or the failure of individual devices.


Item Type:Article
Additional Information:© 1982 by the National Academy of Sciences. Contributed by John J. Hopfield, January 15, 1982. The work at California Institute of Technology was supported in part by National Science Foundation Grant DMR-8107494. This is contribution no. 6580 from the Division of Chemistry and Chemical Engineering. The publication costs of this article were defrayed in part by page charge payment. This article must therefore be hereby marked "advertisement" in accordance with 18 U.S.C. §1734 solely to indicate this fact.
Subject Keywords:associative memory; parallel processing; categorization; content-addressable memory; fail-soft devices
Record Number:CaltechAUTHORS:HOPpnas82
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:HOPpnas82
Alternative URL:http://www.pnas.org/cgi/content/abstract/79/8/2554
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:7427
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:13 Feb 2007
Last Modified:14 Nov 2014 19:19

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