合成标准不确定度评定中相关性的讨论

Discussion of correlation for the combined standard uncertainty evaluation

输入量之间的相关性有时是无法避免的,其相关程度可用相关系数定量表示,而相关系数可以通过实验测量的方法或理论经验的分析得到。当输入量之间的相关性存在时,必须知道了相关系数,才能计算合成标准不确定度。本文介绍了相关系数的评定方法及合成评定中相关性处理的一般原则,着重讨论了相关性产生的原因,对输入量之间相关或不相关的几种情况进行了分析。最后,通过实例对具体的运用作了说明。

Sometimes the correlation of those input quantities is hardly to avoid, the correlation coefficient quantitative expresses the degree of correlation, which could be obtained either experiment with measuring methods or analysis of theory. When these input quantifies were correlative, the combined standard uncertainty could not calculated if the correlation coefficient was unknown.The paper introduces the methods of correlation coefficient evaluation and the common principles of correlation to deal with, also the paper emphasized to discuss the reason of making correlation and analyses to the several occasions either of correlation or no correlation. Finally, the paper applies the partical example to give the process of application.