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arXiv 2411.00534stat.APstat.ME
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函数时间序列中的变点检测:在年龄别死亡率与生育率中的应用

Change-point detection in functional time series: Applications to age-specific mortality and fertility

Han Lin Shang

AI总结:

针对年龄别死亡率与生育率曲线的函数时间序列变点检测问题,提出函数累积和统计量、基于函数模型预测误差序列的两种检测方法,经澳大利亚数据验证可定位变点并确定最优训练周期以提升预测精度。

摘要:

我们研究确定随时间观测的年龄别死亡率与生育率曲线时间序列中的变点问题。本文提出两种检测方法以识别这些变点:第一种方法利用函数累积和统计量精准定位变点;第二种方法先拟合一个函数时间序列模型,计算集成平方预测误差构成的单变量时间序列,再对该误差序列应用变点检测方法确定变点。我们使用澳大利亚年龄别生育率与死亡率数据应用这些方法定位变点,并确定最优训练周期以提升预测精度。

英文摘要:

We consider determining change points in a time series of age-specific mortality and fertility curves observed over time. We propose two detection methods for identifying these change points. The first method uses a functional cumulative sum statistic to pinpoint the change point. The second method computes a univariate time series of integrated squared forecast errors after fitting a functional time-series model before applying a change-point detection method to the errors to determine the change point. Using Australian age-specific fertility and mortality data, we apply these methods to locate the change points and identify the optimal training period to achieve improved forecast accuracy.

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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