arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1708.08604math.STstat.TH
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超高维部分线性可加模型的一个可靠独立筛选方法

A sure independence screening procedure for ultra-high dimensional partially linear additive models

M. Kazemi, D. Shahsavani, M. Arashi

摘要:

我们介绍了一个两步的过程,在超高维加性模型的背景下,其目的是减少协变量向量的大小和区分非零分量之间的线性和非线性效应。我们建议的筛选程序,在第一步,构造的累积分布函数和响应的条件期望的边缘相关的框架内的概念的基础上。B样条和经验分布函数被用来估计上述两个措施。并证明了该过程的确定性。在第二步中,一个双重惩罚的过程中应用,以确定非零和线性成分,同时。通过几个检验函数对所设计方法的性能进行了检验,以显示其在误差分布变化时与竞争对手方法相比的能力。仿真研究表明,该方法适用于超高维数据,并能很好地检测出显著的协变量。并与现有方法进行了比较,证明了该方法的优越性.这种方法也适用于确定最重要的基因过表达的G蛋白偶联受体在小鼠中。

英文摘要:

We introduce a two-step procedure, in the context of ultra-high dimensional additive models, which aims to reduce the size of covariates vector and distinguish linear and nonlinear effects among nonzero components. Our proposed screening procedure, in the first step, is constructed based on the concept of cumulative distribution function and conditional expectation of response in the framework of marginal correlation. B-splines and empirical distribution functions are used to estimate the two above measures. The sure property of this procedure is also established. In the second step, a double penalization based procedure is applied to identify nonzero and linear components, simultaneously. The performance of the designed method is examined by several test functions to show its capabilities against competitor methods when errors distribution are varied. Simulation studies imply that the proposed screening procedure can be applied to the ultra-high dimensional data and well detect the in uential covariates. It is also demonstrate the superiority in comparison with the existing methods. This method is also applied to identify most in uential genes for overexpression of a G protein-coupled receptor in mice.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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