1) stratified simple random sampling
分层简单随机抽样
2) stratified simple random continuous sampling
分层简单随机连续抽样
1.
Because of the extensive application of sample rotation in the continuous sampling survey,we can extend the sample rotation of simple random sampling to stratified simple random continuous sampling,and cluster continuous sampling.
针对实际连续抽样调查中样本轮换的广泛应用,将简单随机抽样场合下的样本轮换问题推广到分层简单随机连续抽样、整群连续抽样,并讨论其估计量、样本量、最优权数以及最优样本轮换率。
3) simple random sampling
简单随机抽样
1.
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。
2.
This paper detailed introduced the two sampling methods, simple random sampling, and stratified sampling, and analyzed the features of the two methods.
我国现行既有房屋构件质量评定检测抽样技术存在明显的缺点,本文详细介绍了以数理统计为基础的简单随机抽样和分层随机抽样两种方法,分析了两种方法的特点。
3.
This paper introduced several methods about the concrete strength inspection: the sampling method given by the present specification; simple random sampling without replacement; stratified sampling .
具体介绍了砼强度检测抽样的几种方法:现行规程抽样法;简单随机抽样法;分层抽样法。
4) Sampling random sampling
简单随机抽样(SRS)
6) stratified random sampling
分层随机抽样
1.
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。
2.
Though stratified random sampling method is adopted for the arterial and collector functional systems,there is a good potential to improve it.
尽管分层随机抽样的方法已经在干线和一般的集散系统得到利用,它仍有很大的发展空间。
3.
Therefore, the minimum variance and deviation methodology was introduced, based on which, stratified random sampling technology was used for sample design, and thus making an overall assessment more truly on water quality in distributi.
为此提出以最小方差和偏差的方法论,采用分层随机抽样技术进行样本设计,从而对管网水质进行较为真实的全面评价,同时对影响管网水质的因素进行分析。
补充资料：分层
分层
stratification
l)当i笋j时，S，自气一必; 2)对所有的i6P，S，是局部闭的; 3)X=日;，S; 4)如果S，自瓦笋必，则S，C瓦(且在尸中，这等价于i共j). 作为一个例子，考虑R’中由不等式尸一少)0给出的子集分成四片退(二，夕):x，一夕，>0}，{(x沙):t丫‘一厂，y>0}，{(、，夕):厂一广y<叫，{o，0}. 现在，设X是一个光滑流形M的子集，X的分层是某个偏序集p的尸分解(S)，。，，使得每片是NI的一个光滑子流形. 分层(S)称为瑚litney分层(认币i吹y stratifi以-‘ion)女11果对每对具有S.C=瓦的层S，，凡，下面的瑚ljtlley的条件A和B(V刃〕itlley‘5 cond itio斑A andB)成立.假设点列y*〔S收敛于y任S‘，点列x*E戈也收敛于ye凡·进一步，假设切平面兀*凡收敛于某个极限平面T和割线.不不收敛于某条线l(关于环绕流形M中y的某个局部坐标系)，则 A)兀S，CT; B)l仁了 条件B)事实上蕴涵着条件A). 涉及V门石tney分层的几个事实和定理如下.一个解析流形的任何闭次解析子集允许一个V刃五切ey分层(〔A51).特别地，R”中的代数集，即由有限多个多项式为零给出的集合(也见半代数集(~‘日罗b几icsct))可以瑚litney分层，认币让ney分层空间可被三角音」分([ A41).分层啤口柱五cati即;c甲。中欣叫H川，亦称层化 一个(可能无限维)流形到严格缩减维数的连通子流形的分解.M.H.B创由互ex阳cK而撰【补注】通常，一个空间的“分层”仅只意味着到具有缩减维数的连通片中的某个分解. 设(尸，<)是一个偏序集.拓扑空问x的一个尸分解(尸~d邸nlposition)是以尸的元素为标号的X的子空间S，的局部有限集，使得
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