查询词典 stratified

Experiment and flow visualization are conducted in a water-filled cavity which cover the range of Ra=1×10〓----6×10〓 and Pr=3. 3---6. 5. Similarity theorem is applied in analytical investigations. And core region stratification effects to heat transfer are studied. By using scale analysis, temperature and velocity profiles in turbulent natural convection boundary layer are obtained. The results reveals that for turbulent natural convection in enclosures, the bulk of the cavity fluid is essentially statement with thermally stratified temperature and the only substantial motion is that in the boundary layer along four side walls.

在实验方面，作者在高Ra范围内（Ra〓=1×10'~Ra〓=6×10〓，Pr=3.3~6.3）对封闭空间实验台以蒸馏水为介质进行了换热实验与流动显示；在理论分析方面，作者采用相似原理导出了分析解；研究了核心区温度分层规律及其对换热的影响；另外还运用尺度分析法探讨了紊流自然对流边界层温度与速度分布。

Most commonly, it begins with random cluster sampling and then applies simple random sampling or stratified random sampling

最常见的是，从随机整群抽样开始，然后应用简单随机抽样或者分层随机抽样

Stratified random sampling and simple random sampling methods were used to select sample from 14 counties.

通过分层抽样和单纯随机抽样相结合的方法，抽取昆明市14个县的部分参合农民进行问卷调查。

Methods The integration of simple random sampling and stratified sampling was adopted to select 480 soldiers of 5 different branches of the military forces stationed in Jinan as study objects.

采用简单随机抽样和分层抽样相结合的方法抽取驻济5个兵种不同的部队，计480名军人作为研究对象。

The simple random sampling plan and stratified random sampling plan has been introduced and the application means and effects of which also has been presented,it has some characteristics such as material precision and obvious reduce of sample size,and rational advice has been presented.

介绍了简单随机抽样和分层随机抽样方法及其在检测中的应用方法和效果。

Consequently, investigated in detail are several concrete complementing schemes based on simple random sampling, stratified sampling.

摘要本文研究了不放回追加策略，包括基本设计和域追加设计都为简单随机抽样、分层随机抽样情形下不放回样本追加时域的估计的问题。

It is verified that th action's mean value of the expected value by simple radom sampling is equal to one by stratified radom sampling.

证明了在期望值决策准则下，用等概率分层随机抽样得到的方案收益期望值的均值，与用简单随机抽样得到的相同。

This would be an example of a stratified sample.

这就是一个典型抽样的例子。

Methods A self-designed questionnaire survey was used to investigate a cluster stratified sample of 1010 college students.

采用分层整群抽样的方法，对广州市1010名大学生进行问卷调查。

Methods:Stratified multiple phases sample method was adopted, 240 female doctors were assessed.

采用多阶段分层抽样方法对240名三级甲等综合医院的女性医生进行调查。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失