查询词典 systematic sampling

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。

In principle, layered random sampling and simple random sampling were used.

取样原则采分层随机抽样和简单随机抽样方式，共抽取12所学校，抽样得70个班级，含68位教师与其班级学生共754人，回收的有效样本共计70班，合计68位级任教师与739位学生。

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。

Results showed that Latin Hypercube sampling can capture more variability in the sample space than simple random sampling especially when the number of simulations is small.

LANDIS模型的模拟结果表明，由地统计学随机模拟所引入的不确定性在象元尺度上随模拟时间增加而增加，但是在景观尺度上并没有受很大影响。

In this article,students actually present at exams are regarded as simple random sampling of all the students,and the sampling and assessing ways are applied.

将实考考生看作为考生总体的一个简单随机样本，应用抽样估值的方法，在若干合适的概率分布模型下，收集和推演了考生总体合格率的一些估计公式，以估计有考生缺考时，考生总体的合格率。

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。

Students will learn Descriptive Statistics, Probability and Random Variables, Probability Distributions, Sampling and Sampling Distributions, Statistical Estimations, and Hypothesis Testing in Statistics.

同学们将在统计学中学习叙述统计量的意义与计算、机率与随机变数、机率分配、抽样与抽样分配、统计估计、假说检定等基础统计方法。

By the introduction of the theory of sampling constant presented by Ingamells and Switzer, the stratified sampling for segregated bulk materials were studied.

将Ingamells-Switzer取样常数理论引入分层性固体物质的取样研究，提出了分层取样的最优化设计方案，推导出了各层取样量及分层取样方差极小值计算公式。

In natural thermoluminescence of soil respect, it has determined the stratgraphy of sampling, and proved anomaly shape has little change with the sampling density.

在土壤天然热释光测试方面，确定了取样层位，研究了取样密度变化对异常形态的影响。

"The operators will suffer a temporary decrease in the number of consumers and short message services as people may not like having to provide their ID cards for a phone number," Xu Junqi, vice-dean with the Policy-Making Institute of the Telecommunications Research Centre under MII, said yesterday.

信息产业部下属的通信决策研究院副主任徐俊其昨天说：&实行手机实名制后，人们可能不太情愿用身份证注册手机号，所以通信运营商会暂时面临用户减少和短信用户减少的问题。&

I don't believe in make-believe!

我不相信这些虚构的故事。