分层
- 与 分层 相关的网络例句 [注：此内容来源于网络，仅供参考]
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Methods A cluster stratified sample of315undergraduates were investigated with a closed questionnaire,and301questionnaires were available.
采用分层整群抽样法，抽取贵州省在校大学生315名进行无记名封闭式问卷调查，获得有效问卷301份。
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Methods A stratified cluster sample of1007college students were questionnaired.
采用分层整群抽样的方法，对广州市1007名大学生进行问卷调查。
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Methods A cluster random stratified sample of404medical college students were investigat-ed with a self-administered questionnaire.
采用分层整群抽样方法对404名医学生进行自填问卷调查。
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To further reduce the time pressure for a larger training data set, the algorithm creates a smaller training data set via the primary model based on a stratified sample.
为进一步减小较大规模训练数据集的回归时间压力，算法对训练数据集的分层采样建立了初步模型，进而产生实际较小规模的训练数据集。
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The cross-sectional approach used a stratified sample, based on an initial list of electric power connections, resulting in the selection of 707 individuals over 18 years of age.
横截方法根据电力连接一张最初的名单使用了分层取样，造成707个个体的选择在18岁期间。
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Objective To study the interrelation of life habit,knowledge and consciousness in preventing infectious disease,and to provide evidence for health education of infectious diseases.Methods A stratified cluster sample of1007college students were questionnaired.
目的 了解学生日常生活习惯、传染病防治知识、防治意识的状况及其相互关系，开展大学生传染病防治健康教育提供依据方法采用分层整群抽样的方法，对广州市1007名大学生进行问卷调查。
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Methods A stratified random cluster sample of 17269 students in China were investigated with the children and adolescents' QOL scale according to the census data in 2000, and the urban and country norm of the scale were respectively established.
依据2005年第5次全国人口普查资料，在全国进行多阶段分层整群抽样，分别建立城市和农村2套常模。
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In this study, stratified sampling is used to select samples in Gansu Province.
本研究采用分层抽样的方法，在甘肃省四个县进行调查和分析。
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Finally to Stratified Sampling improvement of technology put forward some views.
最后对分层抽样技术的改进提出了一些看法。
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Methods 7 282 children aged 2 to 5 years were selected by stratified sampling from twelve software.
分层随机抽取我国12个省市7 282名2～5岁儿童作为研究对象。
- 推荐网络例句
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Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).
呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。
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The cost of moving grain food products was unchanged from May, but year over year are up 8%.
粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。
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However, to get a true quote, you will need to provide detailed personal and financial information.
然而，要让一个真正的引用，你需要提供详细的个人和财务信息。