查询词典 stratified sample

As a most commonly used method of urban vegetation investigation, stratified random selection investigation is the topic of this paper. Based on enormous publications and practical experiences, the authors proposed the systematic processes of investigation planning, with the details and points of attention for field work of urban vegetation survey introduced. The main body of urban vegetation investigation was divided into three parts, i.

本文以大量文献和作者在城市植物调查的实践经验为基础，总结了国内外城市植物研究中常用的分层随机抽样调查方法，并对植物分层随机抽样调查方案设计的步骤、方法及注意事项作了系统总结并提出相关建议，综述性归纳了一套城市植物分层随机抽样调查的方案设计方法。

The fault feature parameters are extracted,subjection functions and fuzzy rules for identifying pattern of fault and selecting phase of fault are developed from perspective of fuzzy pattern recognition,and new algorithm of speedy comprehensive faulty phase selection based on stratified fuzzy reasoning is presented.

提取了用于故障选相的特征参数，从模糊模式识别的角度，制定了识别故障类型和故障相别的隶属函数及模糊规则，提出了基于分层模糊推理的快速综合故障选相元件新算法。

The sampling population of this study is girls at five-year, two-year, four-year and two-year technology of a selected college of commerce in Taipei City in stratified random sampling selection with class as sampling unit. A total of 424 girls are included in the formal survey and 405 valid questionnaires collected.

本研究以国立台北市某技术学院在学日间部五专、二专、四技、二技等学制女学生为抽样母群，采分层随机丛集取样方式，以班级为取样单位，正式施测时共抽取424人，有效问卷405份。

The market for luxury goods and services is highly stratified.

奢侈品与服务的市场是高度分层的。

However, as China's economy boomed and society became more stratified, these

然而，随着中国的经济繁荣和社会更加阶层化，这些猜疑都过去了。

Stratified combustion technology is a new type of advanced energy-saving combustion technology.

分层燃烧技术是一项新型的先进节能燃烧技术。

Subjects were between 3 and 77 years of age, stratified into four age groups.

试验观察对象是在3至77岁年龄人群，分四个年龄组。0、21天2针免疫，21天时为加强免疫。

However,as China's economy boomed and society became more stratified,these suspicions were overcome.

然而，随着中国的经济繁荣和社会更加阶层化，这些猜疑都过去了。

There is no doubt that the dynamics between wave and topography interaction is considerably more complicated a stratified fluid.

毫无疑问，在层结流体中波和地形间相互作用的动力学过程要复杂的多。

This paper describes methods and techniques for 3D modeling and visualization for stratified geological objects.

文中探讨了层状地质体的三维模拟与可视化方法和技术。

His female bullfighter Lydia gradually Health love, but she was in a vegetative state after the Bulls Zhuangcheng away from her, just because Lydia's ex-boyfriend showed more affectionate than he is like love.

他对女斗牛士莉迪亚渐生爱意，却在她被公牛撞成植物人后离她而去，仅仅因为莉迪亚的前男友表现出好似比他更深情的爱。

I know of none which are not easy to answer, but what I am trying to do now is only by a series of hints to throw some light on the narrow path of legal doctrine, and upon two pitfalls which, as it seems to me, lie perilously near to it.

我不认为有什么难以回答的问题，但我现在要做的仅仅是通过一系列线索，来给法律理论的狭窄路径以及在我看来离它近得危险的两个陷阱提供一些启示。