适当的公式和图表总是会平均平均或平均分散使用的统计计算。
The proper formulas for average and range charts will always use an average or median dispersion statistic in the computations.
这些模型是相互分散的、孤立的，种类多、公式繁杂，相互间的联系又不清楚，使油气田现场研究人员难于准确应用。
It is difficult for oil engineers to use the models correctly because these formulae are miscellaneous, isolated each other, and have no any relationship among them.
按照分散性失稳准则，推导出产生壁裂和底裂的判别条件和方盒形件成形过程中的极限压边力公式；
According to diffuse instability criterion, worked out the principle of verdicting the case of base fracture or side fracture and formulae of fracture limit BHF;
给出了最优分散相角值的计算公式及软件计算判断方法。
The methods and the formula of software calculation to opt...
进而结合了类间集中度、类内分散度，提出一种TF -IDF公式的改进形式，来弥补原始tf -IDF方法的缺陷。
To make up for the original TF-IDF formula defects, an improved TF-IDF formula, which combines concentration of a feature among categories, distribution of a feature in category, is proposed.
进而结合了类间集中度、类内分散度，提出一种TF -IDF公式的改进形式，来弥补原始tf -IDF方法的缺陷。
To make up for the original TF-IDF formula defects, an improved TF-IDF formula, which combines concentration of a feature among categories, distribution of a feature in category, is proposed.
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