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arXiv 2006.00447stat.ME
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Cox点过程回归

Cox Point Process Regression

Álvaro Gajardo, Hans-Georg Müller

摘要:

时间点过程有着广泛的应用,包括保险中的索赔到达过程或运筹学中的队列分析。由于技术的进步,这种点过程的样本越来越多地遇到。感兴趣的关键对象是局部强度函数。它有一个简单的解释,允许理解和探索点过程数据。我们考虑点过程的函数方法,其中一个有一个重复实现的点过程的样本。这种情况本质上与Cox过程有关,其中复制的强度函数被建模为随机函数。在这里,我们研究的情况下,一个记录协变量的过程中,如每天的温度为自行车租赁。对于建模点过程的响应与向量协变量作为预测,我们提出了一种新的回归方法的强度函数,本质上是非参数的。虽然一个点的过程,只有一次观察到的固定域上的强度函数不能确定,我们展示了如何协变量和重复观测的过程可以利用一致的估计可能,我们也得到渐近收敛速度,而不调用参数假设。

英文摘要:

Point processes in time have a wide range of applications that include the claims arrival process in insurance or the analysis of queues in operations research. Due to advances in technology, such samples of point processes are increasingly encountered. A key object of interest is the local intensity function. It has a straightforward interpretation that allows to understand and explore point process data. We consider functional approaches for point processes, where one has a sample of repeated realizations of the point process. This situation is inherently connected with Cox processes, where the intensity functions of the replications are modeled as random functions. Here we study a situation where one records covariates for each replication of the process, such as the daily temperature for bike rentals. For modeling point processes as responses with vector covariates as predictors we propose a novel regression approach for the intensity function that is intrinsically nonparametric. While the intensity function of a point process that is only observed once on a fixed domain cannot be identified, we show how covariates and repeated observations of the process can be utilized to make consistent estimation possible, and we also derive asymptotic rates of convergence without invoking parametric assumptions.

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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