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arXiv 1906.00538stat.MEstat.AP
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基于Copula函数的主成分偏最小二乘Bayes分类

Copula-based functional Bayes classification with principal components and partial least squares

Wentian Huang, David Ruppert

摘要:

我们提出了一个新的功能贝叶斯分类器,使用主成分(PC)或偏最小二乘(PLS)得分从共同的协方差函数,即,协方差函数边缘化组。当组具有不同的协方差函数时,PC或PLS得分不需要是独立的或甚至不相关的。我们使用Copula来模拟这种依赖关系。我们的方法是半参数的边缘密度估计非参数核平滑和copula参数建模。我们关注高斯和t-copula,但也可以使用其他copula。我们的方法的强大性能,通过模拟,真实数据的例子,和渐近性质证明。

英文摘要:

We present a new functional Bayes classifier that uses principal component (PC) or partial least squares (PLS) scores from the common covariance function, that is, the covariance function marginalized over groups. When the groups have different covariance functions, the PC or PLS scores need not be independent or even uncorrelated. We use copulas to model the dependence. Our method is semiparametric; the marginal densities are estimated nonparametrically by kernel smoothing and the copula is modeled parametrically. We focus on Gaussian and t-copulas, but other copulas could be used. The strong performance of our methodology is demonstrated through simulation, real data examples, and asymptotic properties.

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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