An uncertainty evaluation for multiple measurements by GUM, III: using a correlation coefficient

被引：9

作者：

Nam, Gyeonghee ^{[1
]}

Kang, Chu-Shik ^{[1
]}

So, Hun-Young ^{[1
]}

Choi, JongOh ^{[1
]}

机构：

[1] Korea Res Inst Standard & Sci, Taejon 305600, South Korea

来源：

ACCREDITATION AND QUALITY ASSURANCE | 2009年 / 14卷 / 01期

关键词：

Uncertainty; Uncertainty propagation; Correlation; Multiple measurement; GUM;

D O I：

10.1007/s00769-008-0439-x

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

After a measurement, a measured value and a measurement uncertainty are produced as a measurement result. By a repeated measurement, another measurement result is produced. Between the individual results of the two measurements, it is shown that there may be a significant correlation. A correlation coefficient can be determined when a GUM-compliant uncertainty budget for a measurement is available. Utilizing the correlations between the N individual results, an equation is derived to combine the N individual uncertainties of N measurements. Using the newly derived equation including the correlation coefficient, three measurement uncertainties of three measurement results are combined as an example. The combined uncertainty is compared with the uncertainty of a measurement which treats the three individual measurements as one process.

引用

页码：43 / 47

页数：5

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