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Monitoring the mean and the variance of a stationary process

机译:监视平稳过程的均值和方差

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摘要

We deal with the problem of how deviations in the mean or the variance of a time series can be detected. Several simultaneous control charts are introduced which are based on EWMA (exponentially weighted moving average) statistics for the mean and the empirical variance. The combined X − S2 EWMA chart is extended to time series. Further simultaneous charts are considered. The comparision of these schemes shows that the residual attempt must be favored if a variance change is present.
机译:我们处理的问题是如何检测时间序列的均值或方差。引入了几个同时控制图,这些控制图基于EWMA(指数加权移动平均值)统计量的平均值和经验方差。组合的X-S2 EWMA图扩展为时间序列。考虑进一步的同时图表。这些方案的比较表明,如果存在方差变化,则必须支持残余尝试。

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