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Study on Web Information Credibility Evaluation Method Based on Improved PageRank

Author: MaWeiZuo
Tutor: YuanFang
School: Hebei University
Course: Applied Computer Technology
Keywords: PageRank Web information credibility Relevance Time degree NPR (New-PR)
CLC: TP393.092
Type: Master's thesis
Year: 2011
Downloads: 63
Quote: 1
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Abstract


In recent years , with the rapid development of the Internet , Web to provide users with a lot of web information resources , and gradually became one of the main ways people get information . The rapid increase of Web quantity and content , making it increasingly difficult to be screened on the credibility of the information in the network . In the traditional structure of the Web mining algorithm PageRank basis , the problem of how to evaluate the credibility of Web information . Actual inspection and analysis , web information credibility of the main factors affecting the interaction between web structure , the degree of correlation between the theme of the web page information as well as information on the website released time . In this paper, considering the above factors, evaluation methods based on improved PageRank of web information credibility . First, consider the structure of the interaction between the Web , by analyzing web information page where the link with the number of links , the object , the establishment of Web interaction diagram ; then use TF-IDF formula expressed as tf theme page information ? idf vector vector cosine distance formula to calculate the degree of correlation between the pages of information topics , the most representative of the web information extracted by analyzing the degree of correlation between the theme of the web page information ; addition, taking into account the web information content release time , so that the credibility of the assessment process , the introduction of the time decay function , use the function to reflect the impact of the time elements of web information credibility . The final assessment of the article is the credibility of the information of each page in the the weighted interaction diagram calculated . Related factors between the theme of the paper, the website information relevance , web pages Published introduced into the interactive diagram of web information , trust propagation mechanism to maintain the credibility of the nodes in the interactive diagram , a node Credits after the change , and other relevant node dynamically changing purposes. Through specific experiments verify the proposed method , the experimental results show that the web information credibility evaluation method based on improved PageRank able to provide users with a more credible , valuable web information .

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