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Stochastic noise Process enhancement of Hopfield neural networks

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3 Author(s)
Pavlovic, V. ; Dept. of Comput. Sci., Rutgers Univ., USA ; Schonfeld, D. ; Friedman, G.

Hopfield neural networks (HNN) are a class of densely connected single-layer nonlinear networks of perceptrons. The network's energy function is defined through a learning procedure so that its minima coincide with states from a predefined set. However, because of the network's nonlinearity, a number of undesirable local energy minima emerge from the learning procedure. This has shown to significantly effect the network's performance. In this brief, we present a stochastic process-enhanced binary HNN. Given a fixed network topology, the desired final distribution of states can be reached by modulating the network's stochastic process. We design this process, in a computationally efficient manner, by associating it with stability intervals of the nondesired stable states of the network. Our experimental simulations confirm the predicted improvement in performance.

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Circuits and Systems II: Express Briefs, IEEE Transactions on  (Volume:52 ,  Issue: 4 )