查询词典 systematic sampling

Two hundred subjects were selected by systematic sampling from non-English-major sophomores in Southwest Jiaotong University.

调查对象是西南交通大学二年级非英语专业的学生，经系统抽样，选取男女学生各100名完成问卷。

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。

The Two-Stage Systematic Sampling simulation strategy is proposed to sovle the instruction selection problem.

针对上述问题，二阶段系统抽样模拟将详细模拟指令的选择分为两个阶段。

Using systematic grid sampling method and geostatistics, the spatial heterogeneity of land use intensity change in Guanxian county from 1990 to 2000 was studied in this paper.

以山东省冠县为研究区域，采用系统网格采样法获取研究样本，以地统计学方法探讨了冠县1990~2000年土地利用强度变化的空间异质性。

With the methods of systematic and random sampling, more than 2000 specimens were collected in 7 kinds of habitat, belonging to 3 superfamilies, 11 families, 30 genera and 48 species. Of the collected specimens, grasshopper has the most species accounting for 62.5% of the total species.

采用系统取样和随机取样相结合的方法调查了7种生境中直翅目昆虫的种类和数量，共采集到昆虫48种，标本2000余号，其中蝗虫类30种，蚱类6种，螽斯类12种，隶属于3总科，11科，30属。

Here, we present a systematic sampling and genetic screening of an East Asian–specific Y-chromosome haplogroup (O3-M122) in 2,332 individuals from diverse East Asian populations.

采用父系遗传的 Y 染色体的遗传标记，我们对 40 个东亚南北方代表群体，共 2332 个男性个体进行了系统的比较分析。

Surveying 1034 enrollees in 4 sampled counties through systematic sampling.

利用系统抽样方法在4地对1034名参合农民进行问卷调查。

METHODS It was compared for quality of the hospitalized medical history by using systematic sampling method and collected 300-patient medical history separately before （from January to June,2005） and after （from January to June,2008） Hospital Management Year activities.

采用系统抽样的方法，分别抽取医院管理年活动前（2005年1～6月）和医院管理年活动后（2008年1～6月）住院病历各300份，对住院病历的质量进行比较。

Systematic random sampling, in which an interval of every Nth shelter or household is sampled and all children under 5 years in that household are measured, is recommended where populations are living in an organized or structured setting as a refugee camp.

系统随机抽样，指在每N个救灾棚或家庭中选取一个为样本，对家庭中所有5岁以下的儿童进行测量。建议对居住在有组织或有单位结构的人群应用这种方法。

Typical tree slelction and random sampling were applied for systematic studies on individual variation of gutta-percha content in samaras of Eucommia ulmoides and the correlations between the characters of samara containing gutta-percha and several macroscopic properties.

采用选择典型样株和随机取样的方法，对杜仲果实含胶特性的个体变异规律及其与若干宏观性状的相关性进行了系统研究。

"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。