Additive mixed models with approximate Dirichlet process mixtures: the EM approach
Additive mixed models with approximate Dirichlet process mixtures: the EM approach
复制标题
具有近似狄利克雷过程混合物的加性混合模型:EM 方法
DOI:
10.1007/s11222-014-9475-z
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发表时间:
2016
影响因子:
2.2
通讯作者:
Heinzl
中科院分区:
文献类型:
--
作者:
Heinzl
We consider additive mixed models for longitudinal data with a nonlinear time trend. As random effects distribution an approximate Dirichlet process mixture is proposed that is based on the truncated version of the stick breaking presentation of the Dirichlet process and provides a Gaussian mixture with a data driven choice of the number of mixture components. The main advantage of the specification is its ability to identify clusters of subjects with a similar random effects structure. For the estimation of the trend curve the mixed model representation of penalized splines is used. An Expectation-Maximization algorithm is given that solves the estimation problem and that exhibits advantages over Markov chain Monte Carlo approaches, which are typically used when modeling with Dirichlet processes. The method is evaluated in a simulation study and applied to theophylline data and to body mass index profiles of children.
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影响因子:
6.9
作者:
Beyerlein, Andreas;Toschke, Andre M.;von Kries, Ruediger
通讯作者:
von Kries, Ruediger
影响因子:
5.7
作者:
F. O’Sullivan
通讯作者:
F. O’Sullivan
影响因子:
13.6
作者:
Rzehak, Peter;Sausenthaler, Stefanie;Heinrich, Joachim
通讯作者:
Heinrich, Joachim
DOI:
10.1111/j.1651-2227.2007.00412.x
发表时间:
2007
期刊:
Acta Pædiatrica
影响因子:
--
作者:
A. Zutavern;P. Rzehak;I. Brockow;B. Schaaf;C. Bollrath;A. von Berg;E. Link;U. Kraemer;M. Borte;O. Herbarth;H. Wichmann;J. Heinrich
通讯作者:
J. Heinrich
影响因子:
4
作者:
Beyerlein, Andreas;Fahrmeir, Ludwig;Mansmann, Ulrich;Toschke, Andre M.
通讯作者:
Toschke, Andre M.