通过对国家标准物质土壤有效态的测试，结果与标准值基本一致，测得值都在标准值的不确定度范围内。

After testing the national standard substance (GBW 07416) of soil available composition, the analytical results are nearly in accord with standard values.

youdao

不确定度是与测量结果相联的参数，表征合理地赋于被测量值的分散性。标准值的不确定度是对真值存在范围的估计和推断。

The uncertainty is a parameter associated with the result of a measurement, which characterizes the dispersion of the values that could reasonably be attributed to the measurement.

youdao

本文简要介绍了汽车底盘测功机的测量原理，以及对其进行检测的方法，并通过分析得出由检定装置给出的标准值的不确定度。

In this paper, we want to introduce the measurement principle of automotive chassis dynamometers and a testing method. And we can educe the uncertainty of the standard value by analyzing.

youdao