Estimating Mixture of Gaussian Processes by Kernel Smoothing.
Estimating Mixture of Gaussian Processes by Kernel Smoothing.
复制标题
通过核平滑估计高斯过程的混合
DOI:
10.1080/07350015.2013.868084
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发表时间:
2014
期刊:
影响因子:
--
通讯作者:
Yao W
中科院分区:
文献类型:
--
作者:
Huang M;Li R;Wang H;Yao W
When functional data are not homogenous, for example, when there are multiple classes of functional curves in the dataset, traditional estimation methods may fail. In this article, we propose a new estimation procedure for the mixture of Gaussian processes, to incorporate both functional and inhomogenous properties of the data. Our method can be viewed as a natural extension of high-dimensional normal mixtures. However, the key difference is that smoothed structures are imposed for both the mean and covariance functions. The model is shown to be identifiable, and can be estimated efficiently by a combination of the ideas from expectation-maximization (EM) algorithm, kernel regression, and functional principal component analysis. Our methodology is empirically justified by Monte Carlo simulations and illustrated by an analysis of a supermarket dataset.
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影响因子:
4.5
作者:
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通讯作者:
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DOI:
10.1198/016214505000000187
发表时间:
2006-03-01
影响因子:
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作者:
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通讯作者:
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