【摘要】 文本表示中特征项的权值确定方法决定了文本特征的提取,在很大程度上影响了文本分类的准确率.通过系统总结常用的几种特征项权值的确定方法,并逐一比较分析和研究,提出了一种性能较好的确定方法——据位定权函数,经实验验证据位定权函数确实能够有效地提高文本分类的准确性.更多还原

【Abstract】 The method of feature weighting ascertainment in text categorizing determines the text feature pick-ups. And the accuracy of text categorizing often depends on the method of ascertaining weighting feature in text pick-ups. Some commonly used methods are outlined here. By comparing, analyzing and studying them, a better method of feature weighting ascertainment is presented here. This method can improve the accuracy of text categorizing efficiently, which is proved by experiments.更多还原