系统的界面性质会影响到系统整体的性质,当界面面积较小时,这种影响很小,往往被忽略。当系统被分散的程度越大,系统的表面积就越大,这时表面性质对系统整体性质的影响就不能忽略了。 物质的分散度(degree of dispersion),物质被分散的程度称分散度。
n. dispersity
The catalyst has large specific surface area of the support Mg(Al)O of 244 m 2g -1 , high Pt dispersion((H/Pg) irr ) of 0.9, homogeneity in particle size and very small average diameter of 1.38 nm.
该载体的比表面积为244m2g-1,该催化剂铂分散度为(H/Pt)irr=0.9,平均直径d=1.38nm,且有均匀的颗粒度。
参考来源 - 催化剂Pt/Mg(Al)O的制备与特性From the micro level, the electrical appliance market is prosperous. But the competition is very strong, manufacturers' dispersion is high, and capability of technical development is low.
从微观层面来看,我国家电行业具有广阔的市场前景,但行业内部竞争激烈,分散度较高,技术开发能力低。
参考来源 - 对美的集团创新发展过程的分析·2,447,543篇论文数据,部分数据来源于NoteExpress
有很多种方法可以度量分散度
那么这些异常值和分散度是怎么影响度量值和标准偏差的呢?
So how do these outliers and dispersion affect the values of the mean and standard deviation?
在第二部分中,我们通过图像方式度量了数据集分散度的层次。
In the second section, we measured the level of dispersion of the dataset by graphical means.
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