arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.06773stat.ME
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超高维广义可加模型:统一理论与方法

Ultra high dimensional generalized additive model: Unified Theory and Methods

Kaixu Yang, Tapabrata Maiti

摘要:

广义可加模型是一种功能强大的统计学习和预测建模工具,已得到广泛的应用。在处理高吞吐量数据(如遗传数据分析)的背景下,对高维加法建模的需求是突出的。本文研究了超高维广义可加模型的两步选择和估计方法。第一步在函数的扩展基础上应用group lasso。这很有可能选择所有非零函数,而不会有太多的过度选择。第二步使用自适应组套索与任何初始估计,包括组套索估计,满足一些常规条件。自适应组套索估计被证明是选择一致的改进的收敛速度。本文还讨论了调整参数的选择,并证明了在GIC过程中,调整参数的选择是一致的。理论性质得到了广泛的数值研究的支持。

英文摘要:

Generalized additive model is a powerful statistical learning and predictive modeling tool that has been applied in a wide range of applications. The need of high-dimensional additive modeling is eminent in the context of dealing with high through-put data such as genetic data analysis. In this article, we studied a two step selection and estimation method for ultra high dimensional generalized additive models. The first step applies group lasso on the expanded bases of the functions. With high probability this selects all nonzero functions without having too much over selection. The second step uses adaptive group lasso with any initial estimators, including the group lasso estimator, that satisfies some regular conditions. The adaptive group lasso estimator is shown to be selection consistent with improved convergence rates. Tuning parameter selection is also discussed and shown to select the true model consistently under GIC procedure. The theoretical properties are supported by extensive numerical study.

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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