查询词典 sampling

A total of 15 838 nationally representative subjects aged 35 to 74 were selected with multistage cluster sampling.

共调查了35～74岁的成年人15 838人。

The samples were collected by way of cluster sampling and 798 were available.

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Methods Stratified random and cluster sampling methods were employed in this study.

正确使用安全、可靠的避孕方法是降低意外妊娠的关键。

Methods Cluster sampling method was used in the 717 persons aged 60 and over in Yanjiao Developing Area.

采用整群抽样方法对河北省燕郊年龄≥ 6 0岁 717名老年人进行问卷调查。

Cluster sampling and questionnaire of traffic safety consciousness of school students in Shanghai were conducted in this study.

采取整群抽样的方法，同时采用统一编制的"上海市中、小学生交通安全知识认知调查表"进行调查。

Methods Cluster sampling was used, and epidemiological investigation was carried by means of questionaires.

采用整群抽样的方法，运用自编的调查表进行流行病学调查。

Methods The study was performed by systematic and cluster sampling and questionnaire.

采用系统整群抽样的方法，以填写调查表的形式进行问卷调查。

Methods With stratified cluster sampling method,2 519 students were questionnaired in Anhui province.

采用分层整群抽样方法，对安徽省2519名中小学生进行问卷调查。

Methods Stratified cluster sampling was used to investigate villagers with questionnaire.

采用分层整群随机抽样方法，对家中有流动人口的村民进行调查。

Methods : A questionnaire survey was conducted among 411 medical staff in 15 departments by stratified cluster sampling.

采用分层随机整群抽样方法，对我院15个部门中的411在职医务人员进行问卷调查。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。