查询词典 unbiased sample

Objective Discuss the accuracy of sample size determination involving binormal ROC parameter estimation.

目的 探讨ROC双正态样本量估计方法的准确性。

Nonparametric model is a reasonable alternative to the conventional binormal model when degenerate data sets occur or when the sample size of continuous data is large.

非参数法中Hanley和McNeil法计算相对简单，容易理解，适用于一般独立的有序分类资料与连续性资料。

For fitting ROC curves and getting the area under the ROC curve, we applied the parametric methods of binormal models and ordinal regression models, the semiparametric method of Cox proportional hazards model, the nonparametric methods of Hanley, Delong This paper also include estimation of required sample size, evaluation of confounding effects, and estimation of standard error and confidence interval by resampling method for ROC analysis.

目前该模型用于ROC分析的统计学方法比较完善，属于"经典"的ROC分析参数法。本文探讨了单变量、双变量双正态ROC模型的构建及其参数的最大似然估计方法；采用双变量卡方检验、真阳性率z检验、面积z检验三种方法比较了ROC曲线间是否具有显著性差异。

Objective To observe the effects of blood sample preparation methods on biochemical values.

目的 探讨血液不同制备方法对其血液生化值的影响。

Chapter 2 explained the definition of the personifying biographic and briefly introduced its model sample: GSS.

第二章解释拟人传体寓言的定义，并简要介绍拟人传体寓言代表作《广谐史》。

The precision and accuracy of the method can meet the requirements of biological sample analysis.

方法的检出限、精密度和准确度基本满足生物样品的分析要求。

Objective The measurement of the ethanol concentration in the biological sample was discussed.

目的 探讨生物样品中乙醇浓度的测定方法。

It is significant for the research of aqueous biological sample adsorbed on the solid surface.

高分辨的图形对于吸附在固体表面水溶生物样品的研究，获取分子内部信息很有意义。

We integrated the biological sample's pretreatment and the real-time fluorescent PCR reaction to one chip.

我们将生物样品的预处理与实时荧光 PCR 反应集成到一块芯片上。

Detection of unknown compound from the collected biological sample has long been the difficult part of poison analysis.

从生物样品中检测未知物，一直以来是毒物分析中的一个难点。

Some of them were ligated to the plasmid vector pCR 2.1 andsequenced,respectively.

将所获DNA片段克隆到pCR2.1载体进行测序，并与基因组数据库进行同源性比较。

Thinking since Google owns Blogger, I would be able to escalate this issue to the support team.

自谷歌的思考拥有Blogger的，我将能够缓解这一问题的支持团队。