查询词典 sampling methods

Methods With multi-stage stratified random cluster sampling, 3835 persons were selected for observation from 145 608 coal mine employees on the list.

采取多阶段分层随机整群抽样方法从某煤矿集团145608名在册员工中抽取3835人为观察对象，进行问卷调查，现场测量血压、身高、体重、腰围及检验血糖、血脂。

Methods randoms sampling method was used and the participants were interviewed by trained health workers under a structured questionnaire.

采用随机抽样的流行病学调查方法进行问卷调查，并对调查人群（392人）测定空腹血糖、血脂、体重指数、血压等，运用CDS标准（2004年）MS定义对资料进行分析。

Two methods( moment estimator ,bootstrap estimator) are presented for estimating the number of rare species by the sampling of quadrats.

利用矩估计和一个稳健估计方法来处理植物学家在林地的地面植被群落调查数据。

The insects were surveyed in 100 m×100 m quadrats and caught by sampling frame and net-trap methods. The insects number was recorded and samples were collected for indoor identification.

昆虫的调查采用100m×100m的样方，利用样筐和网捕法收集昆虫，记录昆虫数量，采集标本在室内进行鉴定。

Methods: The investigation was made among 5204 persons of 1798 households in 3 city propers of Hebei Province by Cluster and stratified sampling method.

本次调查采用多阶段分层整群抽样的方法，共抽取了全省样本地区3个城区(分别是石家庄市长安区、唐山市路北区、张家口市桥东区)，共调查住户1798户，调查人口5204人。

Methods: People (age 18～69) from the six national minorities were investigated through sam- pling by adopting current sociology, anthropology, the method of delaminating cluster sampling in statisti- cal method and the test system on scientific literacy made by the scientific associa...

采用国际通用的社会学、人类学和统计学方法分层整群抽样方法和中国科协制定的科学素养测试体系和问卷模式，对布依族、苗族、侗族、水族、瑶族和毛南族6种少数民族18～69岁成年人进行抽样调查。

Methods: Cluster sampling was used in randomly selected individualsaged(?50 yearsin the southern rural area of Heilongjiang.After the pre-experiment uniform standard was completed,5058 individuals(91%)were received visual acuity test and eye examination.

采用整群随机抽样方法将黑龙江省南部农村人口按一定的标准划分成抽样单位，两组人员通过预实验统一标准后对年龄？

The qualitative methods employed in this study included pretest and posttest, concept map, interview and learning journal. Twelve students were chosen by a purposive sampling method from the class. According to their Raven's Standard Progressive Matrices Testresults, the students were classified into low level of 3, medium level of 6 and high level of 3 with even number of gender. They were interviewed individually about the teaching activities designed by the researcher for this study. The findings were summarized as follows

本研究先采方便取样，选取台北市内湖某国小五年级27位学童为研究对象，进行资料搜集与分析，另采立意取样，依据瑞文氏测验(Raven's Standard Progressive Matrices Test，以下简称SPM)，选取低推理能力3人，中推理能力6人，高推理能力3人，共计12人，男女各半；利用CMDA、前后测以及一对一多次的诊断性晤谈，深入分析 12名访谈对象在教学前、后，对「物质与热」单元的概念学习历程。

Methods By method of stratified random cluster sampling, a total of 1822 children and adolescents of Tibetan, hang and Han nationalities were recruited in A-ba area in Sichuan. Their finds height, sitting- height, knee-height and forearm length were measured. Growth and development of bone were analyzed.

采用分层随机整群抽样的方法，测量四川省阿坝州7~18岁藏、汉、羌族1822名男女儿童少年的身高、坐高、前臂长和膝高4项指标，并对其骨骼生长发育状况进行比较分析。

Methods Cluster sampling was used to investigate general growth situation of the children at 6～13 years of Zhuang and Han nationalities. Their body height, sitting height, body weight and chest circumference were measured.

采用整群抽样方法，以广西移民安置区6～13岁壮族、汉族儿童为调查对象，对儿童进行身高、坐高、体重、胸围测量，家长完成儿童生长发育影响因素问卷调查。

I can do simple painting, carpentry and plumbing.

我能做简单的油漆、木工和修水管等工作。

The motivations, notations and outline of this work are also given in this chapter.

从这个意义上讲，这些时滞是无害的。然后用实例说明这三个定理的应用和互不包含性。