Noise and randomlike behavior in perceptrons: theory and application to protein structure prediction

Mario Compiani; Piero Fariselli; Rita Casadio

doi:10.1117/12.235949

22 March 1996 Noise and randomlike behavior in perceptrons: theory and application to protein structure prediction

Mario Compiani, Piero Fariselli, Rita Casadio

Proceedings Volume 2760, Applications and Science of Artificial Neural Networks II; (1996) https://doi.org/10.1117/12.235949
Event: Aerospace/Defense Sensing and Controls, 1996, Orlando, FL, United States

Abstract

In this paper we study the effective behavior of a single-layer perceptron that is forced to learn a noisy mapping (e.g. associations of patterns with classes). The effect of different kinds of noise on the output of the network is discussed as a function of the noise intensity. It is argued that noise induces a random-like component in the overall behavior of the perceptron which we describe in terms of independent biased random flights in the space of the weights. These random processes (one for each class) are ruled by probability distributions specified by the weights themselves. Our model is applied to the real world application of the prediction of protein secondary structures. Several observations made in this task domain are rationalized in terms of the present model that, among others, provides a link between the seeming existence of an upper bound for the prediction efficiency and the amount of noise in the mapping.

Citation Download Citation

Mario Compiani, Piero Fariselli, and Rita Casadio "Noise and randomlike behavior in perceptrons: theory and application to protein structure prediction", Proc. SPIE 2760, Applications and Science of Artificial Neural Networks II, (22 March 1996); https://doi.org/10.1117/12.235949

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