Accession Number : ADP008622

Title :   Experimental Comparison of Different Associative Memory Techniques Implemented Optically by the Same System Architecture,

Corporate Author : NEUCHATEL UNIV (SWITZERLAND)

Personal Author(s) : Weible, K. J. ; Collings, N. ; Xue, W. ; Pedrini, G ; Daendiker, R.

Report Date : 22 MAY 1992

Pagination or Media Count : 4

Abstract : In recent years, much work has been going on in the optical implementation of artificial neural network systems. The parallel and crosstalk free interconnection characteristics of optical systems are well suited to exploit fully the desired parallel characteristics of artificial neural networks. The application of these systems as associative memories has been explored in many cases. To facilitate optical implementation of these neural systems various modifications to the original Hopfield model have been proposed. It has been shown both theoretically and experimentally, that the storage and recall capacity of neural systems based on the Hopfield model are not significantly reduced when only the inhibitory (negative) interconnections are used. In yet a further simplification, the binarization of the inhibitory interconnections has been proposed. Here also, the theoretical justification claiming negligible effects on the efficiency of the network has been presented. The aim of this paper is two-fold: First, to present an experimental analysis of the effects on the performance of the inhibitory model after binarization of the interconnections.

Descriptors :   *OPTICAL PROCESSING, *ELECTROOPTICS, *NEURAL NETS, *PATTERN RECOGNITION, OPTICAL STORAGE, CIRCUIT INTERCONNECTIONS, HOLOGRAPHY, DIFFRACTION, MEMORY DEVICES, FEEDBACK, BINARY PROCESSORS.

Subject Categories : Electrooptical and Optoelectronic Devices
      Cybernetics

Distribution Statement : APPROVED FOR PUBLIC RELEASE