The application of sample survey method in history research is analyzed.
方法：对项目点北碚区进行抽样调查。
By using the method of sample survey, this paper investigated the edit situation of popup news in the three main instant messengers QQ, POPO and UC, in order to find out their character.
本文通过抽样调查的方法，对当前国内三大网络即时通讯工具(腾讯QQ、网易POPO、新浪uc)弹出式新闻的编辑状况进行比较分析，以揭示其各自的特色。
We used the method of investigating the sample and the general survey to investigate and study the plant resources in area of six counties and two districts under Shangqiu's jurisdiction.
采取样方调查结合普查的方法，对商丘市辖区内六县、两区、一市的植物资源进行了调查。
The generation and damage regulation of red turpentine beetle (Dendroctonus valens) are studied with the method of sample plot and tree-by-tree survey.
采用标准地调查和单株调查的方法，研究了红脂大小蠹的发生和危害规律。
Methods: Stratified random cluster sampling method was used to determine the survey sample.
方法：以分层随机整群抽样的方法，确定调查样本。
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。
The variance estimation is very important part in sample survey, and replicated sample method is a common method.
方差估计是抽样调查的重要组成部分，重抽样方法是常用的方差估计方法。
Method Self-designed questionnaire survey was conducted among 95 chief nurses of cluster convenience sample.
方法采用整群方便样本，运用自设问卷对95名三甲医院主管护师进行调查。
The subject choice, randomized method, blind method, intra-group comparison, sample, compliance, statistical method, therapeutic effect assessment index, survey and side effects were observed.
调查内容包括研究对象选择、随机化方法、盲法、组间可比性、样本大小、依从性、统计学处理、疗效评价指标、随访和不良事件观察等。
Based on the theory and method introduced before, this paper applied the rotation models to compute the sample rotation rate of sampling survey on vacancy rate of households in Shanghai.
包括分层抽样下样本轮换的估计量公式和最优样本轮换率的确定方法。再接着利用前面介绍的理论知识，结合上海市城镇住房空置率抽样调查数据进行实证分析。
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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