The Impulse-Refractive Mode in a Neural Network with Ring Synaptic Interaction View Full Text


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Article Info

DATE

2018-12

AUTHORS

M. M. Preobrazhenskaia

ABSTRACT

This paper considers a mathematical model of a ring neural network with an even number of synaptically interacting elements. The model is a system of scalar nonlinear differential-difference equations, the right-hand sides of which depend on a large parameter. The unknown functions being contained in the system characterize membrane potentials of neurons. It is of interest to search within the system for special periodic solutions, so-called impulse-refractory modes. Functions with odd numbers of the impulse-refraction cycle have an asymptotically large burst and the functions with even numbers are asymptotically small. For this purpose, two substitutions are made sequentially, making it possible to study of a two-dimensional system of nonlinear differential-difference singularly perturbed equations with two delays instead of the initial system. Further, as the large parameter tends to infinity, the limiting object is defined, which is a relay system of equations with two delays. Using the step-by-step method, we prove that the solution of a relay system with an initial function from a suitable class is a periodic function with required properties. Then, using the Poincaré operator and the Schauder principle, the existence of a relaxation periodic solution of a two-dimensional singularly perturbed system is proven. To do this, we construct asymptotics of this solution, and then prove its closeness to the solution of the relay system. The exponential estimate of the Frechet derivative of the Poincaré operator implies uniqueness of the solution of a two-dimensional differential-difference system of equations with two delays in the constructed class of functions and is used to justify the exponential orbital stability of this solution. Furthermore, with the help of reverse replacement, the proven result is transferred to the original system. More... »

PAGES

777-789

References to SciGraph publications

Journal

TITLE

Automatic Control and Computer Sciences

ISSUE

7

VOLUME

52

Author Affiliations

From Grant

  • Identifiers

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    http://scigraph.springernature.com/pub.10.3103/s0146411618070210

    DOI

    http://dx.doi.org/10.3103/s0146411618070210

    DIMENSIONS

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