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- This would be an example of a stratified sample. 这就是一个典型抽样的例子。
- Methods A questionnaire survey was conducted to a clustered stratified sample of 1785 children in Qingdao. 方法采取分层整群抽样的方法对青岛市1785名儿童进行问卷调查。
- 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。
- We also proposed a control mechanism for the width of BTP through stratified sampling method. 然后基于自回归模型生成新的草书纹理，并引入分层采样方法来控制纹理宽度；
- Methods: A large-scale survey was conducted at 250 medical health units baaed on stratified sampling. 方法使用分层抽样的方法在全国范围内抽取250家医疗机构开展大规模调查。
- 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。
- Objective To understand the status quo of disinfection of Baotou City Dental Clinic using stratified sampling method,the public hospitals and private clinics conducted a sample survey. 目的了解包头市口腔诊疗机构消毒工作现状,采用分层抽样方法,对公立医院和私营诊所进行了抽查。
- Methods Using the method of multistage stratified sampling,1253 wrinkly and elderly people were investigated with the questionnaire. 方法采用多阶段分层抽样方法,对1253名中老年人进行问卷调查。
- Methods Survey objects were determined by chester and stratified samplings,andthe HBsAg, anti -- HBs, anti -- HBc and HBeAg were tested by hemospaisia. 方法整群、分层抽样确定调查对象，抽血检测HBsAg、抗-HBs、抗-HBc、HBeAg。
- Method Adopt stratified sampling structural examination and The Brief Psychiatric Rating Scale (BPRS) to measure for 107 heroin dependence in-patients. 方法采用分层抽样、定式检查及简明精神病量表(BPRS),对107例海洛因成瘾患者进行测试。
- Methods A stratified sampling study of smoking situation and related factors were conducted among 1560 students in two universities in Wuhu city. 方法采用整群抽样方法抽取芜湖市两所高校大学生1560人进行横断面研究。
- Stratified sampling was conducted by county to capture rats,and to sort out flea for identification of their genus and species. 以县为单位分层抽样设点捕获鼠类，并从鼠体检取蚤类，鉴定鼠、蚤种属。
- Methods An anonymous survey was conducted among 502 students from a technical college selected by stratified sampling and cluster sampling. 方法采用分层整群抽样的方法对一所职业技术学院的502名学生进行匿名式问卷调查。
- 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。
- Considering the methods employed on site and the implement used for drawing the samples, normally quantity interval, time interval or stratified sampling method shall be used. 应根据现场作业方式、取样设施配备情况选定，一般采用定量取样、定时取样或分层取样等方式。
- Methods Stratified sampling methods were used to carry out the prevalence study of maternity and child care for women at child bearing-age in Luochuan County and Bin County. 方法采用分层抽样,抽取洛川、彬县育龄妇女入户进行妇幼保健现状问卷调查。
- Method Le-gionella was tested from air-condition cooling tower water, secondary water supply, drinking water and the earth s surface water by stratified sampling. 方法采取分层抽样方法分别对冷却塔水、二次供水、管网水(出厂水)、地表自然水进行军团菌检测。
- I am afraid the last post has been dispatched. 恐怕末班邮件已经发出了。
- All bookings must be made by post. 所有预约都必须用信函形式。
- By parcel post our samples were sent. 我们的样品是通过邮包寄送的。
