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Published in: Cognitive Neurodynamics 3/2020

13-03-2020 | Research Article

Effects of network topologies on stochastic resonance in feedforward neural network

Authors: Jia Zhao, Yingmei Qin, Yanqiu Che, Huangyanqiu Ran, Jingwen Li

Published in: Cognitive Neurodynamics | Issue 3/2020

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Abstract

The effects of network topologies on signal propagation are studied in noisy feedforward neural network in detail, where the network topologies are modulated by changing both the in-degree and out-degree distributions of FFNs as identical, uniform and exponential respectively. Stochastic resonance appeared in three FFNs when the same external stimuli and noise are applied to the three different network topologies. It is found that optimal noise intensity decreases with the increase of network’s layer index. Meanwhile, the Q index of FFN with identical distribution is higher than that of the other two FFNs, indicating that the synchronization between the neuronal firing activities and the external stimuli is more obvious in FFN with identical distribution. The optimal parameter regions for the time cycle of external stimuli and the noise intensity are found for three FFNs, in which the resonance is more easily induced when the parameters of stimuli are set in this region. Furthermore, the relationship between the in-degree, the average membrane potential and the resonance performance is studied at the neuronal level, where it is found that both the average membrane potentials and the Q indexes of neurons in FFN with identical degree distribution is more consistent with each other than that of the other two FFNs due to their network topologies. In summary, the simulations here indicate that the network topologies play essential roles in affecting the signal propagation of FFNs.

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Metadata
Title
Effects of network topologies on stochastic resonance in feedforward neural network
Authors
Jia Zhao
Yingmei Qin
Yanqiu Che
Huangyanqiu Ran
Jingwen Li
Publication date
13-03-2020
Publisher
Springer Netherlands
Published in
Cognitive Neurodynamics / Issue 3/2020
Print ISSN: 1871-4080
Electronic ISSN: 1871-4099
DOI
https://doi.org/10.1007/s11571-020-09576-8

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