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- area cluster sample 区域聚类样本
- Methods: Samples of population and death are taken out from the three communities in Chongqing urban area , 1994-2000yr, by cluster sampling . 方法:采用整群抽样的方法抽取重庆市主城区中三个社区1994-2000年人口及其死亡情况的资料。
- The cluster sample method is most often used because, in the initial stages of emergencies, people are rarely living in a structured pattern. 分组抽样方法是最常用的,因为在紧急情况的初期,人们很少住在有组织的环境中。
- On two-stage adaptive cluster sampling to assess pest density. 应用二阶适应性整群抽样估计害虫密度。
- Cholera incidence appeared area clustering in Guangxi Province. 广西霍乱发病呈现一定的地区聚集性。
- DESIGN:A stratified randomized cluster sampling survey. 设计:分层随机整群抽样调查。
- Methods With the method of stratified and cluster sampling, a questionnaire for the specific technicist of prevention and cure of AIDS and a visitation for the leaders in county area were carried out. 方法采用分层整群抽样法,对基层艾滋病防治相关领导及艾滋病防治专业技术人员进行访谈及问卷调查。
- Methods By using the cluster sampling method, a sample of 518 students drawn from 4 high schools in Chuzhou, then a questionnaire survey was conducted among them. 方法采取整群抽样方法对滁州市4所高中三年级毕业班学生518名进行问卷调查。
- Liu,Mayer and Eckhardt discussed interval estimtion of the RR in cluster sampling on the basis of beta binomial model. Liu等人在聚类抽样的情形下基于贝塔二项分布模型讨论了风险比的区间估计问题.
- Objective Both area clustering appeared in cholera and it's ranks of distribation were explored from the distribution chart of accumulative incidence rate. 目的从广西霍乱累计发病率分布图上探讨该病在地理分布上有否聚集性以及聚集性的等级分布如何。
- Contrast group:Other 218 undergraduates were adopted in cluster sampling,taking class as unit. 对照组:除外观察组学生,随机在4届学生中以班为单位整群抽样218名学生。
- He steered into the parking area. 他把车开进了停车区。
- Me thods: 5449 students from 5 primary of middle schools in Xining city were chosen with cluster sampling. 方法:随机整群抽取西宁市5所中小学校在校学生5449人,采取问卷进行流行病学调查和研究。
- Methods 273 university students were tested by Lusi Scale with cluster sampling method. 方法应用路西量表采用随机分层抽样的方法对大学生进行心理测试。
- Methods To collect data by cluster sampling and analyze data by polychotomous Logistic regression. 方法采用整群抽样调查搜集资料,采用多分类回归分析筛选影响因素。
- This paper discusses cluster sampling and stratified cluster sampling in continuous surveys with censuses. 本文讨论了连续调查中应用普查方法时的整群抽样和分层整群抽样。
- Methods With stratified sampling and cluster sampling, we investigate 487 families in poverty. 方法采用分层整群抽样方法调查487户贫困家庭。
- The slum area was sordid and filthy beyond belief. 该贫民区之污秽肮脏简直令人难以置信。