Intelligent Database Systems Lab Presenter: CHANG, SHIH-JIE Authors: Bui Quang Hung, Masanori Otsubo, Yoshinori Hijikata, Shogo Nishida 2010.WIA. HITS.

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Presentation transcript:

Intelligent Database Systems Lab Presenter: CHANG, SHIH-JIE Authors: Bui Quang Hung, Masanori Otsubo, Yoshinori Hijikata, Shogo Nishida 2010.WIA. HITS algorithm improvement using semantic text portion

Intelligent Database Systems Lab Outlines Motivation Objectives Methodology Experiments Conclusions Comments

Motivation Previous researches have tried to solve following problems using anchor-related text. Link-spamming problem BHITS method Automatically generated links, banner ads => Topic drift problem Identify important link => Chakrabarti’s method P P P P P Page A Authority score A P P P P P Page B Hub score B

Intelligent Database Systems Lab Objectives Investigate the effectiveness of using Semantic Text Portion (STP) for improving the HITS.

Methodology – The HITS algorithm authority hub Root set R Base set i

Methodology – The BHITS method authority hub Root set R Base set i hub_wt auth_wt

Methodology – Chakrabarti’s method authority hub Iteratively calculates authority scores and hub scores.

Intelligent Database Systems Lab Methodology – Chakrabarti’s method

Intelligent Database Systems Lab Methodology – Semantic text portion(STP) STP is a text portion in the original page which is semantically related to the anchor pointing to the target page. LSP: Local Semantic Portion USP: Upper-level Semantic Portion

Intelligent Database Systems Lab Methodology – Example of LSP 410list

Intelligent Database Systems Lab Methodology – Example of USP USP

Intelligent Database Systems Lab Methodology-

Methodology – Collecting base set I 1 Root set R Base set i

Intelligent Database Systems Lab Experiments

Intelligent Database Systems Lab Experiments

16

17 Ranking results for the architecture query

Intelligent Database Systems Lab Ranking results for the bicycling query

Intelligent Database Systems Lab

Conclusions The use of STPs is best for improving the HITS algorithm.

Intelligent Database Systems Lab Comments Advantages - Effective. Applications - Web mining 、 Rank web pages.