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基于小波框架的自适应径向基函数网络 被引量:3

RADIAL BASIS FUNCTION NETWORKS BASED ON WAVELET FRAMES
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摘要 给出了由高斯径向基函数生成的一组小波框架 ,建立在小波框架理论的基础上 ,构造性地证明了高斯径向基函数网络可以任意精度地逼近 L2 ( Rd)中的函数 .在此基础上 ,利用高斯径向基函数的时频局部化性质和自适应投影原理 ,进一步给出了构造和训练网络的自适应学习算法 .应用到信号的重构和去噪 。 A set of wavelet frames generated by Gaussian radial basis functions are presented. It is constructively proved that a radial basis function network with Gaussian activation functions can approximate any function in L2(Rd) with desired accuracy. Furthermore, an adaptive learning algorithm of constructing and training networks is proposed based on time-frequency localization properties of Gaussian radial basis functions and the adaptive projection algorithm. Applications to signal reconstruction and noise elimination are given.
出处 《自动化学报》 EI CSCD 北大核心 2002年第2期229-237,共9页 Acta Automatica Sinica
基金 国家自然科学基金 (69872 0 3 0 ) 教育部优秀青年教师基金 (97年度 )资助
关键词 径向基函数网络 小波框架 自适应学习算法 神经网络 Adaptive algorithms Approximation theory Learning algorithms Noise abatement
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