Longitudinal data is typical related data, and it is desirable to choose correct data variance structure since the correct structure affects the efficiency of estimation.
纵向数据为典型的相关数据，数据方差结构选择的正确与否直接影响估计的效率。
Well-constructed use cases provide value to testing efforts in terms of coverage efficiency, ease of traceability, and accuracy in estimation.
构建良好的用例能够以有效率的，易于跟踪的，以及评估准确性的方式为测试任务提供价值。
This sampling technique shows the organic combination of the delaminated sampling and the intercrossing sampling, which is in favor of raising the estimation efficiency of the sampling survey.
该项抽样技术体现了分层抽样与交叉抽样的有机结合，有利于提高抽样调查的估计效率。
应用推荐