Characterizations and constructions of reverberating networks |
| |
Authors: | Masako Sato Chiaki Tanaka |
| |
Affiliation: | Department of Mathematical Sciences, College of Engineering, University of Osaka Prefecture, Sakai, Osaka 591, Japan;Nippon Electric Co., L.T.D., 33-1, Shiba 5 Chome, Chiyoda-ku, Tokyo 108, Japan |
| |
Abstract: | Consider the family n of all n neuron networks whose dynamical behaviors are described by Caianiello's neuronic equations, and also its subfamily n of all reverberating networks each of whose neuronic equations have only periodic solution (states), i.e., without having any transient states. This paper is specifically concerned with characterizations of the subfamily n. First, we show that n is contained in a subfamily n of n consisting of all self-dual networks. We introduce Chow's matrix corresponding to each network of n, using Chow parameters and some algebraic operations {α} applied to the coefficient matrix of the network in n, such as interchanges of coefficients between two neurons or changes of their signs. Then we give some necessary conditions on Chow's matrix under which any network in n belong to n, and a necessary and sufficient condition on the coefficient matrix. We also discuss relations between Chow's matrix and the maximum period of reverberations. In particular, it is shown that Chow's matrix of a network in n is symmetric if and only if the maximum period of reverberations is less than three. By virtue of these results, we propose two methods of construction of networks in n. The first method is an inductive construction. The second is based on the algebraic operations. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|