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arXiv 2303.13262cs.NE
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噪声对具有线性激活函数的循环神经网络的影响

Noise impact on recurrent neural network with linear activation function

V. M. Moskvitin, N. Semenova

AI总结:

该研究以带线性激活函数的回声状态网络(ESN)为例,分析硬件循环人工神经网络中加性、乘性高斯白噪声的传播特性,考察输入、记忆特性及连接矩阵对噪声累积的影响,发现大模糊系数的对角储备池矩阵可减少噪声累积,为硬件神经网络的噪声抑制和稳定性设计提供依据。

摘要:

近年来,神经网络领域越来越多的研究者对构建硬件实现的神经网络产生了兴趣,这类实现中神经元及其连接以物理方式实现。人工神经网络(ANN)的物理实现从根本上改变了噪声影响的特性。在硬件ANN的场景下,存在多种性质各异的内部噪声源。本文的研究目的是以回声状态网络(echo state network, ESN)为例,研究循环ANN中内部噪声传播的特性,探索抑制此类噪声的方法,并论证网络对部分类型噪声的稳定性。\n 本文分析了存在不相关加性和乘性高斯白噪声时的ESN。本文考虑的场景是人工神经元具有带不同斜率系数的线性激活函数。本文从研究单个含噪声神经元入手,逐步拓展问题复杂度,考察输入信号和记忆特性如何影响ESN中的噪声累积。此外,本文还研究了主要类型的连接矩阵对噪声累积的影响,具体选取了均匀矩阵,以及带有不同“模糊”系数的类对角矩阵作为这类连接矩阵。\n 研究发现,ESN输出信号的方差和信噪比的总体表现与单个神经元的情况相似。采用具有大“模糊”系数的对角储备池连接矩阵的ESN中,噪声累积量更少,这一点在不相关乘性噪声的场景下尤为明显。

英文摘要:

In recent years, more and more researchers in the field of neural networks are interested in creating hardware implementations where neurons and the connection between them are realized physically. The physical implementation of ANN fundamentally changes the features of noise influence. In the case hardware ANNs, there are many internal sources of noise with different properties. The purpose of this paper is to study the peculiarities of internal noise propagation in recurrent ANN on the example of echo state network (ESN), to reveal ways to suppress such noises and to justify the stability of networks to some types of noises. In this paper we analyse ESN in presence of uncorrelated additive and multiplicative white Gaussian noise. Here we consider the case when artificial neurons have linear activation function with different slope coefficients. Starting from studying only one noisy neuron we complicate the problem by considering how the input signal and the memory property affect the accumulation of noise in ESN. In addition, we consider the influence of the main types of coupling matrices on the accumulation of noise. So, as such matrices, we take a uniform matrix and a diagonal-like matrices with different coefficients called "blurring" coefficient. We have found that the general view of variance and signal-to-noise ratio of ESN output signal is similar to only one neuron. The noise is less accumulated in ESN with diagonal reservoir connection matrix with large "blurring" coefficient. Especially it concerns uncorrelated multiplicative noise.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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