... chemical stratification 化学成层现象... stratification sampling 分层取样 underground stratification 地下成层现象...
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... 放射取样法 radiometric sampling; radiometricsampling 分层取样法 stratification sampling 货车取样法 method of car sampling ...
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OPS Optimal Stratification Sampling 最优分层抽样
cluster stratification sampling 整群分层抽样
optimal stratification sampling [统计] 最优分层抽样
aerial photo stratification sampling 航空像片分层抽样调查
environmental stratification sampling technique 环境梯度分层采样技术
stratification sampling with aerial photographs 航空象片分层抽样
double sampling for stratification [统计] 分层的双重抽样
Hygiene investigation was carried out in 156 classrooms of 36 schools with stratification sampling.
采用分层抽样方法，对36所学校、156间教室进行卫生学调查。
Stratification is one of the key techniques in stratified sampling investigation and monitoring using remotely sensed data.
分层技术是遥感分层抽样调查与监测方法中的关键技术之一。
Methods the sampled students, which were taken out from the all middle schools in Sanming city by means of randomized stratification cluster sampling, were investigated with AAT (adaptability test).
方法按整群、分层、随机的原则，采用学习适应性测验(中学生版)对全市中学进行抽样调查。
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