在进行特定主题网页信息发现与采集时,网页与主题相关性判断尤为重要,在分析主题词语义概念扩展的基础上,结合主题词在网页不同部分结构中的重要性,设计了语义分析的网页与主题相关度算法,实验分析表明该算法克服了传统词频统计法的弊端,提高了网页与主题相关性判断的准确率。 It is very important to judge the relevance of the webpage to the subject when it comes to the discovery and collection of the information of the particular subject webpage. Based on the analysis of the extension of the semantic concept of the subject keyword and the importance of the keyword in the structure of the different parts of the webpage, a web page of semantic analysis is designed Experimental results show that the algorithm overcomes the shortcomings of the traditional word frequency statistics and improves the accuracy of judging the relevance between the webpage and the topic.