查询词典 stratified sample

At present,the methods of random sampling,systematic sampling and stratified sampling are widely used in remote sensing sampling.

目前，随机抽样、系统抽样和分层抽样方式在遥感抽样调查技术领域应用比较广泛。

This survey adopted a stratified, three stage, systematic random sampling method.

从十九所大学院校中抽出1，600人，然后采个别面访方式进行，共访问成功1，436人。

Later,calculation of vertical velocity and dispersion relation for three-ply type areperformed, as is done for the case when density is stratified continuously. For thelatter, it gives internal wave's propagation form in space.

针对密度分布的三层模式，计算了垂向速度模态与内波的色散关系；连续分层的情况，则给出了半板造波的垂向模态分布与空间传播形态。

The interaction of water waves with a floating,truncated cylinder in a continuously stratified fluid was studied.

研究了在线性连续分层流体中水波与截断圆柱浮体相互作用的问题。

Interaction of Water Waves with a Floating, Truncated Cylinder in a Continuously Stratified Fluid

线性连续分层流体中水波与截断圆柱浮体的相互作用，尤云祥；徐杰；魏岗；常煜；张军；赵峰-66文免费论文库，大学生论文库

But there are still some problems existed such as the structure of staff members is far from reasonable,the contents of formulary are incomplete,non-stratified application of antibacterials,the unsoundness of the adverse drug reaction monitoring network etc.,which remain to be solved and further standardized.

结果与结论：通过3年来"医院管理年"活动的开展，河南省二级综合性医院的药学管理工作普遍得到促进和提高，但仍存在一些问题，如部分医院药事管理委员会组成人员欠合理，处方集内容不完善，抗菌药物临床分级应用执行不到位，药品不良反应监测网络体系不健全等，需进一步规范并持续加强。

It is shown that under certain condition the convection may also develop in a stable stratified atmosphere, because the ambient wind field and stratification variate with the development.

分析结果指出，对流除在不稳定和中性稳定层结条件下可以发展外，在稳定层结条件下也可以得到发展，并且扰动的振幅最后均趋于有限值。

Mount Achugao, situated about 2 miles North, has been interpreted to be a remnant of a stratified composite volcanic cone whose Eocene center was not far north of the present peak.

正是由于有众多的中国人，所以中国的食品、饭店、商店遍布全岛，给中国人的居住、饮食带来了便利。

Testing Study on complete deformation property of voussoir beam in stratified rocks.

层状岩石铰接拱全过程变形性质试验研究。

We made use of the methods of stratified sampling and random sampling to investigate 269 882 broth prescriptions of Medical Department of TCM in 21 various hospitals, 18 provinces, and constructed the database, then applied Weka KDD software to analyze.

在全国不同区域，选取18个省市的21家医院，采用分层抽样和简单随机抽样相结合的方法，收集门诊中医内科内服汤剂处方269 882张，构建中药饮片用量数据库，基于Weka数据挖掘软件进行统计分析。

Warden: That's a beautiful dog, but don't bring her again.

那是条漂亮的狗，但是不要再把她带来了。

You get up in the morning – no hangover!

你第二天早上起来的时候—不会宿醉！