?词频

...章详细信息 关键词： 特征选择;;词频;;文档频;;粗糙集;;信息量;;属性约简 [gap=935]Keywords: feature selection;word frequency;document frequency;rough set;information quantity;attribute reduction ..

?字频率

... 复热式捣固焦炉 reheat tamping coke-oven 字频率 word frequency 变速规律 laws about modified speed ...

?词汇重复率

... word study词的研究 word frequency词汇重复率 written language书面语 ...