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Author:

Li, Rui (Li, Rui.) | Liu, Youming (Liu, Youming.) (Scholars:刘有明)

Indexed by:

EI Scopus SCIE

Abstract:

Using wavelet methods, Fan and Koo study optimal estimations for a density with some additive noises over a Besov ball B-r,q(s) (L) (r,q >= 1) and over L-2 risk (Fan and Koo, 2002 [13]). The L-infinity risk estimations are investigated by Lounici and Nickl (2011) [19]. This paper deals with optimal estimations over L-P (1 <= p <= infinity) risk for moderately ill-posed noises. A lower bound of L-P risk is firstly provided, which generalizes Fan Koo and Lounici-Nickl's theorems; then we define a linear and non-linear wavelet estimators, motivated by Fan Koo and Pensky-Vidakovic's work. The linear one is rate optimal for r >= p, and the non-linear estimator attains suboptimal (optimal up to a logarithmic factor). These results can be considered as an extension of some theorems of Donoho et al. (1996) [10]. In addition, our non-linear wavelet estimator is adaptive to the indices s, r, q and L. (C) 2013 Elsevier Inc. All rights reserved.

Keyword:

Density function Optimality Besov spaces Additive noise Wavelet estimation

Author Community:

  • [ 1 ] [Li, Rui]Beijing Univ Technol, Dept Appl Math, Beijing 100124, Peoples R China
  • [ 2 ] [Liu, Youming]Beijing Univ Technol, Dept Appl Math, Beijing 100124, Peoples R China

Reprint Author's Address:

  • 刘有明

    [Liu, Youming]Beijing Univ Technol, Dept Appl Math, Beijing 100124, Peoples R China

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Source :

APPLIED AND COMPUTATIONAL HARMONIC ANALYSIS

ISSN: 1063-5203

Year: 2014

Issue: 3

Volume: 36

Page: 416-433

2 . 5 0 0

JCR@2022

ESI Discipline: MATHEMATICS;

ESI HC Threshold:81

JCR Journal Grade:1

CAS Journal Grade:1

Cited Count:

WoS CC Cited Count: 31

SCOPUS Cited Count: 34

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 8

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