The ultraviolet absorbance of the extraction liquid didn ' t relate to the sample weight or the extracted time 化探样萃取液的紫外吸光度与萃取时间及称样量关系不大。
The sample weight , the microwave power , pressure and time used for digesting the sample were studied in detail and optimized 在样品处理中也采用了常规溶样方法,并分别用两种样品处理方法测定石油焦中的硅。
The number of individuals in different demographic groups who would have provided usable information if response rates were equivalent . see sample weighting 如果回复率相等,那么会提供有用信息的具有不同人口统计特征的个人
The process of assigning mathematical weights in an attempt to correct over or underrepresentation of some groups in the unweighted in - tab sample . see sample weighting 分配数学权重的过程.旨在修正未加权样本对某些人群代表过度或代表不足的偏差
By using the order with multiples of sample weights , the result of decision - making not only shows the magnitude of attributes , but also shows the growth of attributes 进一步,我们将它抽象成权重信息不完全的多属性决策问题,并提出了一种简便、实用的决策方法。