ORACLE-EFFICIENT CONFIDENCE ENVELOPES FOR COVARIANCE FUNCTIONS IN DENSE FUNCTIONAL DATA
ORACLE-EFFICIENT CONFIDENCE ENVELOPES FOR COVARIANCE FUNCTIONS IN DENSE FUNCTIONAL DATA
复制标题
密集函数数据中协方差函数的 Oracle 高效置信区间
DOI:
10.5705/ss.2014.182
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发表时间:
2016
影响因子:
1.4
通讯作者:
Yang Lijian
中科院分区:
文献类型:
--
作者:
Cao Guanqun;Wang Li;Li Yehua;Yang Lijian
We consider nonparametric estimation of the covariance function for dense functional data using computationally efficient tensor product B-splines. We develop both local and global asymptotic distributions for the proposed estimator, and show that our estimator is as efficient as an “oracle” estimator where the true mean function is known. Simultaneous confidence envelopes are developed based on asymptotic theory to quantify the variability in the covariance estimator and to make global inferences on the true covariance. Monte Carlo simulation experiments provide strong evidence that corroborates the asymptotic theory. Examples of near infrared spectroscopy data and speech recognition data are provided to illustrate the proposed method.
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影响因子:
3.7
作者:
Crainiceanu CM;Staicu AM;Di CZ
通讯作者:
Di CZ
影响因子:
4.5
作者:
Wang Jiangyan;Liu Rung;Cheng Fuxia;Yang Lijian
通讯作者:
Yang Lijian
DOI:
10.1111/j.1467-9868.2005.00530.x
发表时间:
2006-02
期刊:
Journal of the Royal Statistical Society: Series B (Statistical Methodology)
影响因子:
--
作者:
Fang Yao;Thomas C. M. Lee
通讯作者:
Fang Yao;Thomas C. M. Lee
影响因子:
4.5
作者:
Hall, Peter;Mueller, Hans-Georg;Wang, Jane-Ling
通讯作者:
Wang, Jane-Ling
影响因子:
4.5
作者:
Yao, F;Müller, HG;Wang, JL
通讯作者:
Wang, JL