查询词典 systematic sampling

Methods: According to the principle of stratified proportional sampling, a total of 1605 adult subjects from 17 cities and their surrounding rural areas of China was measured by CWVDT.

自编中文字词识别测验，经条目筛选后采用分层比例抽样方法，在全国五个行政区17个大中城市及周边农村抽取样本1605例。

A data collection at the 3rd week of the postpartum period included 512 postpartum women. They were recruited in the study using proportional stratified quota sampling by birth rate from clinics and hospitals in Kaohsiung City in the southern part of Taiwan.

研究资料在产后第三周进行收集，以南台湾的高雄市医院和诊所的新生儿出生率为依据，采用比例性分层取样法，共计512位产妇参与本研究。

The subjects were selected by the "probability proportional to size" sampling method from Taipei County from February to July 1988. A total of 2,367 mothers of children were questioned in personal and/or telephone interviews. The response rate was 74%.

以等机率分层分段抽样方法，自台北县内选取12至23个月大之幼儿为样本，於民国七十八年一月至七月间，针对幼儿母亲以家庭访视和电话访问方式，共收得2，367位个案资料，完访率达74%。

Probability proportional sampling conducted according to various school sizes was used in this study to select subjects from all school nurses working at the elementary and junior high school levels.

研究采横断性调查法，研究工具为结构式问卷，采邮寄问卷方式以等比例分层随机抽样针对全国各学校单位之学校卫生护理人员进行抽样调查。

The results have been adopted as the reference frame of the multi-stage, PPS (Probability Proportional to Size) sampling design of the 2005 National Health Interview Survey in Taiwan.

本文结果亦已被2005「国民健康访问调查」所采用，做为进分层多阶段、抽取与单位大小成比之等机抽样设计之考。

Methods: The study population was physicians of accredited regional general hospitals in central Taiwan. The amount of samples for all levels hospitals depended on proportional sampling. Totally, 920 copies of questionnaires were issued. Among them, the valid questionnaires were 506 copies and valid response rate was 55%. Data collection was by means of structured questionnaires.

研究对象为中部地区医院评鉴等级为地区级以上综合医院之医师，依比率抽样方式决定各层级医院之样本数，共发出920份问卷，有效问卷共计 506份，有效问卷回收率为 55%，藉由结构式问卷收集资料。

Three methods are adopted to improve the performance of output precision and cross regulation in the multi-output switch mode power supply,including stack wire wound of transformer,output inductance coupling and output proportional sampling.

针对多路输出 DC/DC变换器存在的输出精度与交叉调整率问题，提出了三种改善措施：变压器堆叠绕法、输出电感耦合与输出比例取样反馈，同时给出了设计实例。

With self-compiled "Questionnaire of the life stress on students in university who anticipate that mainland China students study in Taiwan." The survey uses the method of proportional allocation, and the sampling is based on the proportion of total students in 29 colleges.1000 college students were selected as sample subjects and given a questionnaire survey.

本研究系以自编《我国大学生预期陆生来台就学之生活压力调查问卷》为研究工具，研究对象按照各校总学生数进行比例配置取样，随机抽取北部地区29所一般大学日间部大学生1000人，进行问卷调查研究，其中有效样本为937人。

The research targets of the study were the grade-six students of public elementary schools in Taipei County, and the survey through questionnaires was done using stratified proportional sampling, with 1,190 valid questionnaires and valid return rate of 92% from all the questionnaires collected.

研究对象为九十五学年度台北县公立国小六年级学童，采分层比例抽样进行调查，回收之有效问卷计1190份。

The accuracy of measurands estimates are associated with wave length, pulse repeat frequency, correlation coefficient, spectral width, and number of sampling pairs.

偏振参量的估值精度与波长、脉冲重复频率、相关系数、谱宽和取样数有关。

When this condition occurs, inbound replication with the source partner is stopped on the destination domain controller and event ID 2042 is logged in the Directory Services event log.

计算机密码学是研究计算机信息加密、解密及其变换的科学，是数学和计算机的交义学科，也是一门新兴的学科。

Instructions: click on the thumbnails to see a larger image, then use the left-right arrow keys to scroll through the slideshow.

使用说明：滑鼠点在小图上即可放大观赏。开启后键盘左右键可用来换照片。