سال انتشار: ۱۳۸۱

محل انتشار: هشتمین کنفرانس سالانه انجمن کامپیوتر ایران

تعداد صفحات: ۸

نویسنده(ها):

Hamid Reza Motahari Nezhad – Intelligent System Lab. Computer Engineering Faculty Amirkabir University of Technology Tehran-Iran
Ahmad Abdollahzadeh Barfourosh – Intelligent System Lab. Computer Engineering Faculty Amirkabir University of Technology Tehran-Iran

چکیده:

Most of popular search engines accept user’s query as a set of keywords. But, keywords are not powerful enough for comprehensive representation of user request. In this paper, we introduce “Domain Specific Concept Hierarchy (DSCH)” as a specialization of concept hierarchies. Then we propose a new algorithm for automatic construction of DSCH. Using this hierarchy in a domain specific search engine, search engine expands the user’s query by adding a set of conceptually related terms to query. The proposed algorithm has been implemented
and the results are presented. We have used DSCH in AKU-CS domain specific search engine. The result shows significant improvement in quality of results of search engine so that it returns results that are more relevant to the user’s query with higher ranks in comparison with
original search engine, which does not use query expansion. We used Cora search engine that is a computer science papers search engine as original system.