文章基本信息

标题：Estimation error analysis of deep learning on the regression problem on the variable exponent Besov space
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作者：Kazuma Tsuji ; Taiji Suzuki
期刊名称：Electronic Journal of Statistics
印刷版ISSN：1935-7524
出版年度：2021
卷号：15
期号：1
页码：1869-1908
DOI：10.1214/21-EJS1828
语种：English
出版社：Institute of Mathematical Statistics
摘要：Deep learning has achieved notable success in various fields, including image and speech recognition. One of the factors in the successful performance of deep learning is its high feature extraction ability. In this study, we focus on the adaptivity of deep learning; consequently, we treat the variable exponent Besov space, which has a different smoothness depending on the input location x. In other words, the difficulty of the estimation is not uniform within the domain. We analyze the general approximation error of the variable exponent Besov space and the approximation and estimation errors of deep learning. We note that the improvement based on adaptivity is remarkable when the region upon which the target function has less smoothness is small and the dimension is large. Moreover, the superiority to linear estimators is shown with respect to the convergence rate of the estimation error.
关键词：adaptive approximation; deep learning; neural network; Nonparametric regression; variable exponent Besov