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arXiv 1804.03366stat.MEmath.STstat.TH
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泛函线性过程谱密度算子的相等性检验

Testing equality of spectral density operators for functional linear processes

Anne Leucht, Efstathios Paparoditis, Theofanis Sapatinas

摘要:

研究了两个独立泛函线性过程的全二阶结构的相等性检验问题。一个功能齐全的$L^2$型测试的开发,评估,在所有的频率,估计的两个过程的谱密度运营商之间的希尔伯特-施密特距离。研究了检验统计量的渐近性质,并在原假设下得到了其极限分布。此外,一种新的频域bootstrap方法,它更准确地逼近检验统计量的分布下的零比大样本高斯近似。建立了Bootstrap过程的渐近有效性,证明了Bootstrap检验在备选方案下的一致性。数值模拟表明,即使对于小样本,基于自举的测试具有非常好的尺寸和功耗行为。本文还介绍了气象功能时间序列的应用。

英文摘要:

The problem of testing equality of the entire second order structure of two independent functional linear processes is considered. A fully functional $L^2$-type test is developed which evaluates, over all frequencies, the Hilbert-Schmidt distance between the estimated spectral density operators of the two processes. The asymptotic behavior of the test statistic is investigated and its limiting distribution under the null hypothesis is derived. Furthermore, a novel frequency domain bootstrap method is developed which approximates more accurately the distribution of the test statistic under the null than the large sample Gaussian approximation obtained. Asymptotic validity of the bootstrap procedure is established and consistency of the bootstrap-based test under the alternative is proved. Numerical simulations show that, even for small samples, the bootstrap-based test has very good size and power behavior. An application to meteorological functional time series is also presented.

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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