stratified sampling

Method Using stratified-cluster sampling method, we interviewed with 343 low-income family at their home.

方法：采用分层整群抽样，抽取浙江省开展新型农村合作医疗的试点县和非试点县343户低保户进行了入户调查。

Method: adapted to the stratified sampling method, 133 medical colleges teachers, 82 political counselor, 90 medical clinical teachers of affiliated hospitals and 244 students of in Xinjiang xx medical colleges as a research intern object were collected.

方法：采取分层抽样的方法，分别抽取新疆某高等医学院校教师133人、政治辅导员82人，附属医院临床带教医生90人，以及新疆某高等医学院校不同专业实习生2434人作为研究对象。

Methods: The self-designed questionnaires were used to anonymously investigate on179 students in19 academies of the university who were selected by stratified random sampling.

方法：运用笔者自行编制的问卷，采取分层随机抽样的方法对山西师范大学19个专业的179名大学生进行匿名调查。

Methods With proportional stratified sampling and cluster sampling method, 3555 subjects were selected including officials, company staff, high school students, community population and floating population.

方法采用多阶段按比例随机抽样和整群抽样相结合的方法，抽取公务员、公司职员、高中生、社区居民、流动人口共计3555人，用国际体力活动量表长卷进行调查。

Stratified random sampling of forest survey

森林分层随机抽样调查

Methods: The number of samples was calculated with the optimum allocation stratified random sampling survey.

应用最优分配随机分层抽样方法确定调查点.

Methods 104 DPN patients were randomly paired by the stratified sampling method and divided into acupuncture medicament group and control group, 52 cases for each.

方法将DPN患者104例，随机分为针药组和对照组各52例。

Improved stratified sampling technique and performance research

改进型分层抽样技术及性能研究

PARTICIPANTS: Totally 528 students, aged 17 to 20 years old, were recruited from grade one of year 2003 in Southwest University of Science and Technology with stratified sampling method.

对象：调查对象来源于以整群分层方法抽取的2003级在西南科技大学就读的一年级学生528名，年龄17～20岁。

Inaccuracies in the present proportionate stratified sampling algorithm based on fuzzy failure rate data is one main cause which makes the testability demonstration results untrustworthy.

现有的分层抽样算法中故障率数据不准确是导致测试性验证试验结果不可信的一个原因。

Methods Under stratified sampling, the investigation of the oral health concept and behavior were carried out using closed type questionnaire method.

方法采取分层抽样方法，分别对口腔健康观念与行为情况进行问卷调查、填写记录。

Methods With stratified sampling, 678 college students in three universities of Fujian were questioned with the self-designed self-forgiveness questionnaire of college students, Simplified Coping Style Questionnaire ( SCSQ) and Pittsburgh Sleep Quality Index Questionnaire ( PSQI).

方法通过分层抽样选取福建省三所高校大学生678名，选用自编《大学生自我宽恕问卷》、《简易应对方式问卷》（SCSQ）以及《匹兹堡睡眠质量指数》（PSQI）对被试进行问卷调查。

Methods: Data of 2972 Navy conscripts were collected with stratified sampling and cluster sampling.

方法：设定口腔健康状况调查记录标准，采用分层和整群抽样的方法选择调查样本，共调查2972人。

stratified sampling method for assessment of ambient air quality

环境空气质量评定用分层取样法

Methods An equal-sized stratified multi-stage randomly sampling design was applied to obtain three provincially representative sample groups consisted of 720 Guangdong residents each, aged at 12,35-44 and 65-74 years old respectively, with a gender ratio of half to half.

方法采用多阶段分层等容量随机抽样的方法，抽取广东省12岁、35~44岁、65~74岁城乡常住人口各720人，男女各半。

Methods: The study adopted stratified sampling method. 521 students were subjected to questionnaire of MHQ, STAI, CED-S and EPQ.

方法：本研究采用分层整群抽样的调查法和心理测验法，对521名调查对象实施了月经健康问卷、状态特质焦虑问卷、流调中心用抑郁量表、艾森克个性问卷调查。

According to the social economy and geography of these regions, Stratified random sampling was adopted and the surveyors are 2540 people.

根据各地区的社会经济发展水平和地理分布，采用分层随机抽样的方法，共调查了2540人。

The Method of Mixed two-phase Stratified Sampling in Market Research; Methods Stratified chester random sampling.

市场调研中的混合双重分层抽样方法方法采用分层整群随机抽样的调查方法。

Methods: With stratified sampling, 197 the first grade and the forth grade students were surveyed at Suzhou University using Questionnaire for Undergraduate Repression, data were analyzed using SPSS.

方法：在苏州大学一年级、四年级的文理科中按性别比例随机抽样，采用《大学生压抑感调查问卷》进行问卷测试并将采集到的数据输入计算机，进行SPSS统计检验。

Methods Grade one students in junior middle schools were selected, a two-stage, stratified cluster sampling method was applied to collect traditional teaching group ( 124), in-class peer group ( 145) and high-grade peer group ( 133).

方法以初一学生为教育对象，采用二阶段分层整群抽样方法，确定传统教学组、本班同伴组和学长同伴组，各组学生人数分别为124145和133人。

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.

Stratified sampling and importance sampling are two Monte-carlo statistic methods. Software Markov-chain usage model is a mathematical model and preciously describes the usage of software.

分层抽样和重要抽样方法是两种常用的蒙特卡罗统计方法，Markov链使用模型是利用数学模型精确地描述软件的使用。