摘要
基于对BP算法执行过程中平台现象出现原因的剖析,提出了一种新的激活函数(f(x)=0.5sinλx+0.5),实验证明使用新的激活函数能有效地抑制平台现象,提高收敛速度。
By analyzing the reasons of the platform phenomenon, the author puts forward a new activation function (f(x)=0.5sinλx + 0.5)to replace sigmoid function in BP algorithm, which is proven by experiment to effectively control the platformphenomenon that appears in the course of BP algorithm, so as to accelerate the convergence speed.
出处
《台州学院学报》
2002年第3期7-9,共3页
Journal of Taizhou University
关键词
前馈神经网络
平台现象
激活函数
feed-forward neural network
platform phenomenon
activation function
