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Local linear smoothing to estimate accelerated lifetime model with censoring and truncation

机译:局部线性平滑以估计带有删减和删减的加速寿命模型

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摘要

A nonparametric accelerated failure time (AFT) model is considered to evaluate the dependability measures of a water supply system laid in a city of the Mediterranean Sea. To do it, a set of breakdown data of sections of pipe of the system is available. Unlike the usual methods that assume a parametric family for the underlying lifetime, we propose an AFT model with an unspecified distribution for the underlying lifetime. To carry out the model fitting we suggest a two-stage procedure. Firstly, we estimate the influence of certain factors over the lifetime of the system. Secondly, we propose modern and flexible statistical tools based on counting processes to construct a smooth estimate the reliability measure of a specific system. We prove the good asymptotic properties of the estimator.
机译:考虑使用非参数加速故障时间(AFT)模型来评估位于地中海城市的供水系统的可靠性指标。为此,可以使用一组系统管道的故障数据。与假定基础寿命的参数族的常规方法不同,我们提出了一种AFT模型,其基础寿命的分布不确定。为了进行模型拟合,我们建议分两个阶段进行。首先,我们估计某些因素对系统寿命的影响。其次,我们提出了基于计数过程的现代灵活的统计工具,以构建对特定系统可靠性度量的平滑估计。我们证明了估计器的良好渐近性质。

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