发现抽样

此项研究获得的创新成果在于：（1）发现抽样方法的不同对网络多重结构特征具有不可忽视的影响；（2）结合实际网络的结构特征，提出中枢抽样这一策略性方法。

The original achievements include : ( 1 ) finding that sampling methods have a nontrivial influence on multiple structural properties of networks ; ( 2 ) proposing a strategy of hub sampling based on the characteristics of real networks .

实验发现在相同抽样空间，品质长度和平均长度的方差较小，其中平均长度即便在2000根的抽样空间，它的重复性也可达到0.83mm。

It also shows that the variances of quartile length and mean length are smaller in the same range of sampling , and the reproducibility of mean length is 0.83 mm even when only ( 2 000 ) pieces of fiber sampling are performed .

当这些奶成分材料或产品进口到美国或在亚洲市场发现时，抽样检查就已经完成。

This sampling and testing is done when these ingredients or products are imported into the United States or found during visits to Asian markets .

我们发现，在抽样样本中，所有低收入国家和59%的中等收入国家的现有精神卫生专业人员比应提供核心精神卫生干预所需要的精神卫生专业人员要少得多。

All low-income countries and59 % of the middle-income countries in our sample were found to have far fewer professionals than they need to deliver a core set of mental health interventions .

通过对分立式多阶段随机抽样方式的分析，发现在其随机抽样过程中存在着违背等概率原则的问题。

Through analyzing multi stage random sampling in separate groups , we discover that in the process , there exists the question of violating the principle of equal probability .