Methods A cluster sample of 8 054 students(aged 12-18 years) were chosen from 28 middle schools in Guangzhou.
方法采取整群抽样方法，对广州市28所中学12~18岁的中学生8 054名进行吸烟状况的问卷调查。
Methods With the method of questionnaire survey, a cluster sample of 3 012 students (aged 15-19) were investigated. They were chosen from Qinghai Province, Shanxi Province and Zhejiang Province.
方法选择青海省、山西省、浙江省各1个县，采用整群抽样的方法，共选取3 012名15 ~19岁在校中学生进行问卷调查。
A sample cluster topology is shown in figure 2.
图2中是一个示例集群拓扑。
Following the steps described in this article, you'll start out simply to ultimately create a sample script that lets you create a single cluster member.
按照本文描述的步骤，我们将从易到难，最终完成一个可以创建单个集群成员的示例脚本。
The types of electrofacies of standard sample beds from key well are classified by a combination of principal component and cluster analysis.
用主成分分析与聚类分析结合的方法划分关键井中标准样本层的测井相类型；
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。
A cluster dendrogram of the sample was constructed using average linkage clustering.
用平均连锁聚类法构建了样本的遗传相关聚类图。
Based on uniform design and the cluster theory, a optimum selecting method of sample is proposed to solve the problem of sample selection.
结合均匀设计和聚类思想提出的样本优选方法，在一定程度上解决了神经网络样本选择的问题。
The fuzzy membership is defined by not only the relation between a sample and its cluster center, but also those among samples, which is described by the fuzzy connectedness among samples.
在确定样本的隶属度时，不仅考虑了样本与类中心之间的关系，还考虑了类中各个样本之间的关系，并采用模糊连接度来度量类中各个样本之间的关系。
Secondly, a new projection index based on dynamic cluster rule is constructed in the PPDC model, which would finish the sample clustering based on the projected characteristic value.
以投影寻踪理论为基础，利用动态聚类方法构建投影指标，建立了水资源评价的投影寻踪动态聚类模型。
Methods:A stratified cluster sample of 212 junior middle school students was investigated with a self-made questionnaire.
方法：采用分层整群抽样方法，对武汉市某中学212名初一、二学生进行自编的初中生性知识性态度问卷调查。
Methods A cluster stratified sample of 1681 students ham Jianghan University were investigated by SDS.
方法采用分层整群抽样法抽取江汉大学1681名本科学生，采用抑郁自评量表（SDS）进行测评。
This research adopts investigation methods of stratified sampling and cluster sampling, chooses 95 community health service organizations in 14 cities of Liaoning Province as a analysis sample.
采取分层整群抽样的调查方法，选取辽宁省14个市95家社区卫生服务机构作为分析样本。
Methods: an anonymous questionnaire was completed on a stratified cluster sample of 1735 elementary school and middle school students who were randomly selected from Hegang.
方法：分层随机整群抽取鹤岗市1735名中小学生进行无记名问卷调查。
Secondly, a new projection index based on dynamic cluster rule is constructed in the PPDC model, which would finish the sample clustering based on the projected characteristic value.
在一个简单投影指标下，用新的优化途径建立了多元数据分类模型，并将其用于多指标的标准水质分类。
Methods a cluster random sample of 2 015 undergraduates were investigated with an anonymous questionnaire.
方法采取整群随机抽样方法选取被试，对抽取的2 015名大学生进行匿名自填问卷调查。
Methods: a cluster random stratified sample of 394 medical college students were investigated with a SCL-90 questionnaire.
方法：采取分层整群抽样的方法抽取394名医学生进行SCL- 90症状自评量表的问卷调查。
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。结果81。5%的学生使用过互联网。
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。结果81。5%的学生使用过互联网。
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