定额抽样
- 与 定额抽样 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:Stratified quota sampling was used to select four communities,representing different community health service models.
采用分层定额抽样方法，抽取 4个不同类型的社区，以入户调查和面对面访谈的方式共调查居民 4 17名，比较贫困居民和普通居民在卫生服务需求和利用方面的差异，并了解他们对家庭病床的认识。
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Methods: This study used quota sampling, and the subjects were patients selected from 10 medical centers which volunteered to participate in the DOH project.
研究对象为10家自愿参与试办计画的医学中心，采用定额抽样方式，受试样本为申请与无申请电子病历两类病患。
- 推荐网络例句
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The split between the two groups can hardly be papered over.
这两个团体间的分歧难以掩饰。
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This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.
这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。
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The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.
聚光：照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔，然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力