查询词典 youden

Flow measurement ; Flowmeter ; Calibration facility ; Youden analysis ; t_distribution（Student's distribution）; intercomparison

流量测量；流量计；校验装置；尤登分析法； t分布；比对

According to the theory of probability and theory of errors, an improved statistical analysis method based on the t-distribution, which can be used to calculate the radius of the Youden circle, is presented by the authors.

本文对流量标准装置比对试验中目前普遍使用的尤登分析法进行了详细的讨论，并在此基础上，根据概率论与误差理论，提出了一种基于t分布计算尤登圆半径的新方法。

Results The sensitivity (82.1%), likehood ratio (4.49), and Youden′s index (0.638) of UmA S/D were higher than those of UtA S/D;the sensitivtity (85.7%), specificity (82.9%), likehood ratio (5.01), and Youden′s index (0.686) of UmA △Q were all higher than those of UtA △Q; and the various indexes of UmA △Q and UtA △Q were higher than those of UmA S/D and UtA S/D; each index of IlA S/D and IlA △Q was lower.

结果：UmA S/D的敏感度(82.1%)、阳性似然比(4.49)及约登指数(0.638)均高于UtA S/D；UmA △Q的敏感度(85.7%)、特异度(82.9%)、阳性似然比(5.01)及约登指数(0.686)均高于UtA △Q，且UmA △Q和UtA △Q各项指标分别高于UmA S/D和UtA S/D；IlA S/D及IlA △Q各指标均较低。

The sensitivity of BIS and Youden index were calculated, and the sensitivity and specificity of BIS were identified.

计算BIS的敏感度和约登指数，确定BIS监测的敏感度和特异度。

According to the cases and lymph node regions,the sensitivity,specificity and Youden's index were calculated respectiv...

螺旋CT检查对诊断子宫颈癌盆腔淋巴结转移的特异度较高，具有一定的参考价值；但灵敏度偏低，有待改进

To control the slope of standard curve in spectrophotometry by using the two kinds of graphics of Youden,we can directly find out the quality of the data,accuracy and precision of the measuring point.

应用尤登双样图对分光光度法进行标准曲线斜率的控制，能简单直观地了解数据质量，看出测点的准确度和精密度，可用同心圆确定测点所代表的标准曲线的斜率是否可接受

Results The diagnostic sensitivity, specificity, positive/negative predictive value, positive/negative likelihood ratio and Youden's index in rheumatoid arthritis patients were 69.4%, 96.8%, 89.1%/94.1%, 19.28/0.317 and 0.658 respectively.

结果 本法对类风湿关节炎的诊断敏感性为69.4%，特异性为96.8%，阳性预测值为89.1%，阴性预测值为94.1%，阳性似然比为19.28，阴性似然比为0.317，Youden指数为0.658。

MethodsACCP antibody and RF were detected in serum samples of 90 RA patients, 30 other diseases patients and 35 healthy blood donors.The sensitivity,specificity,positive predictive value, negative predictive value, agreement rate and Youden's index of these parsmeters for the diangnosis of RA were analyzed.

方法对90例RA患者、30例其他疾病患者和35例健康对照组血清用ELISA法检测抗CCP抗体、免疫散射比浊法检测RF，比较2种抗体单独或联合检测对诊断RA的敏感性、特异性、阳性预测值、阴性预测值、总符合率及Youden指数；探讨抗CCP抗体和RF的相关性，通过绘制ROC曲线，计算ROC曲线下面积。

Tail Length, Tail Moment, Tail DNA Percentage, and correction rate were compared between the improved software and the original one, and epidemiological indices for the improved software were also calculated and analyzed, including sensitivity, specificity, Youden index, crude agreement, adjusted agreement, positive predictive value, negative predictive value, positive likelihood ratio, and negative likelihood ratio.

比较改进前后的尾长、尾矩、尾DNA百分含量上的差异、改进前后分析正确率差异、以及改进后的软件以不同DNA损伤级别为截断值判定阳性结果的灵敏度、特异度、Youden指数、粗一致性、调整一致性、阳性预测值、阴性预测值、阳性似然比和阴性似然比。

Results PCT of bacterial infection group was significantly higher than that in non-bacterial infection group （χ^2=0. 05, P〈0.05）. With increase in the concentration of PCT, its sensitivity was lower, but its specificity was higher. With PCT≥1.5 ng/ml as the cutoff point for positive, Youden＇s index and agreement were highest.

随血清PCT浓度升高，其对危重病人感染诊断的敏感度降低、特异度增高；以1.5ng／ml为阳性诊断标准时，Youden指数和诊断符合率分别为0.65和83.0％，明显高于以1ng／ml和2ng／ml为阳性诊断标准时。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。