arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1710.02269stat.ME
收藏

函数回归的最优全局检验

Optimal Global Test for Functional Regression

Simeng Qu, Xiao Wang

摘要:

本文研究了函数线性模型中斜率函数零点的光滑样条最优检验。我们提出了一个广义的似然比检验的基础上,一个易于实现的数据驱动的估计。测试的质量是通过空值和仍然允许可能测试的替代集合之间的最小距离来衡量的。导出了该距离的极大极小衰减率的下界,并且用衰减速度快于该下界的距离进行测试是不可能的。我们证明了极大极小最优速率是由光滑样条核和协方差核共同决定的。结果表明,我们的测试达到这个最佳的速率。仿真进行了确认我们的测试的有限样本性能,以及说明的理论结果。最后,我们应用我们的测试来研究氮氧化物($\text{NO}_{\text{x}}$)的轨迹对臭氧水平($\text{O}_3$)的影响。

英文摘要:

This paper studies the optimal testing for the nullity of the slope function in the functional linear model using smoothing splines. We propose a generalized likelihood ratio test based on an easily implementable data-driven estimate. The quality of the test is measured by the minimal distance between the null and the alternative set that still allows a possible test. The lower bound of the minimax decay rate of this distance is derived, and test with a distance that decays faster than the lower bound would be impossible. We show that the minimax optimal rate is jointly determined by the smoothing spline kernel and the covariance kernel. It is shown that our test attains this optimal rate. Simulations are carried out to confirm the finite-sample performance of our test as well as to illustrate the theoretical results. Finally, we apply our test to study the effect of the trajectories of oxides of nitrogen ($\text{NO}_{\text{x}}$) on the level of ozone ($\text{O}_3$).

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。

↑