Represents the supported compare functions in the 类类型中受支持的比较函数。
The objective of the apply object is to apply the compare function on the value picked from the bag returned by 返回)中选择的值应用比较函数,将它与条件中规定的值进行比较。
With difference from the way that traditional methods perform by accumulating the frequency of keywords . we propose a new metrical function that employs the rs - based entropy by comparing function values to measure the feature of web pages . besides , according to the unstructured and heterogenous characteristics of www , the effect of hypertext tags to keywords " weigh has been taken into account to obtain the most effective keywords for document classification 有别于传统的对关键字频度进行累加的方法,本文提出了基于信息熵的文本关键词测度函数,通过对关键词函数值进行比较,获取对文本分类最具影响性的关键词序列;同时,针对web上异质、非结构化信息的特点,该分类算法还考虑了超文本标记对关键词权值的影响。