摘要
不确定度连续传递模型的基本步骤为:①对标准曲线的各点进行不确定度评定,给出各点的标准不确定度;②对标准曲线各点的响应值进行多次测定,得出其平均值和标准不确定度;③以这2个标准不确定度为权重进行拟合,得出双误差拟合方程和标准不确定度的计算公式;④计算标准曲线各点与其校准点的差值,并将其转换成标准不确定度;⑤将以上4项按不确定度传播规律计算总不确定度。实际测量时,①、②、④步用插值法算得。通过一个实例比较了不同拟合方法间结果的差别,说明了运用X、Y的相对误差作为权重的直线拟和,再加上"不确定度连续传递模型"算得的测量不确定度更为合理。
Basic steps of Continuous Propagation Model of Uncertainty are as follows：firstly,evaluate the uncertainty of standard series and obtain the standard uncertainty;secondly,determine the response value of standard series time again and calculate the mean and standard uncertainty; thirdly,fit the standard curve by double errors regression and obtain the double-errors fitting equation along with calculation equation of standard uncertainty;and then calculate the different values between standard points and calibration points,moreover,convert it into the standard uncertainty;finally,total uncertainty of all above are calculated by the rule of uncertainty propagation.The 1,2,4 steps are calculated by interpolation in actual measurement.Furthermore ,calculation results by different fitting methods are compared and proved the measurement uncertainty that calculated by the model is more reasonable.
出处
《地质通报》
CAS
CSCD
北大核心
2010年第11期1721-1725,共5页
Geological Bulletin of China
基金
2008年公益性行业科研专项资金项目<地下水无机检测标准方法溯源系统建设>(编号:200811133)资助
关键词
不确定度
加权回归
双误差
uncertainty
weighted regression
double errors
