Modeling and qualitative analysis of continuous-time neural networks under pure structural variations

被引：2
|
作者：
Grujic, LT [1 ]
Michel, AN [1 ]
机构：
[1] UNIV NOTRE DAME, DEPT ELECT ENGN, NOTRE DAME, IN 46556 USA
来源：
MATHEMATICS AND COMPUTERS IN SIMULATION | 1996年 / 40卷 / 5-6期
基金：
美国国家科学基金会;
关键词：
Hopfield neural networks [1-4]w ere mainly modeled by assuming a time-invariant structure and used to study their qualitative dynamical properties [5; 6]. During the learning process a neural nework is subjected to (arbitrary or designed) structural variation [4; 7]. Dynamics of neural networks under designed structural variations was investigated in [8; a nd of those under unpredictable structural and/or parameter variations in [10].H owever; modeling of Hopfield neural networks under pure structural variations has not been carded out; which is done in what follows. Stability analysis of neural networks initiated by Hopfield [1 ] for a special class of neural networks was developed for any type of Hopfield neural network and extended to the qualitative analysis of their motions in forced regimes in [5; 11 ]. It was emphasized in [1; 9] that in neurobiology the structure of the circuit changes every time learning occurs and that a memory stored in an artificial neural network is achieved by an appropriate choice of conductances. Stability analysis of neural networks under structural variations was considered in [5; 7; and under both parameter and structural variations in [8]. In what follows; new results are obtained for exponential stability of x -----0 of Hopfield neural networks and for estimates of the domain of the exponential stability; which is also defined herein; under arbitrary t Supported in part by NSF Grant ECS 91-07728. * Corresponding author;
D O I：
10.1016/0378-4754(95)00004-6
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
A qualitative analysis is developed for continuous-time neural networks subjected to random pure structural variations. Simple algebraic conditions are established for both structural exponential stability of x = 0 of the neural network and for estimates of its domain of attraction. Bounds on motions of the neural network in a forced regime are provided. They do not require any information about its actual structure, which can be completely unknown and may vary unpredictably.
引用
收藏
页码：523 / 533
页数：11
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