On the characteristics of the autoassociative memory with nonzero-diagonal terms in the memory matrix

  • Authors:
  • Jung-Hua Wang;Thomas F. Krile;John F. Walkup;Tai-Lang Jong

  • Affiliations:
  • Department of Electrical Engineering, Texas Tech University, Lubbock, TX 79409-3102 USA;Department of Electrical Engineering, Texas Tech University, Lubbock, TX 79409-3102 USA;Department of Electrical Engineering, Texas Tech University, Lubbock, TX 79409-3102 USA;Department of Electrical Engineering, National Tsing-Hua University, Taiwan

  • Venue:
  • Neural Computation
  • Year:
  • 1991

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Abstract

A statistical method is applied to explore the unique characteristics of a certain class of neural network autoassociative memory with N neurons and first-order synaptic interconnections. The memory matrix is constructed to store M = N vectors based on the outer-product learning algorithm. We theoretically prove that, by setting all the diagonal terms of the memory matrix to be M and letting the input error ratio = 0, the probability of successful recall Pr steadily decreases as increases, but as increases past 1.0, Pr begins to increase slowly. When 0 Pr 0.99, the tradeoff between the number of stable states and their attraction force is analyzed and the memory capacity is shown to be 0.15N at best.