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LucQE [lucky] - Lucene Query Expansion Module
See:
Description
| Class Summary | |
|---|---|
| GoogleSearcher | Performs Query Expansion, utilizing google for document source |
| QueryBoostComparator | |
| QueryExpansion | Implements Rocchio's pseudo feedback QueryExpansion algorithm |
| QueryExpansionTest | |
LucQE [lucky] - Lucene Query Expansion Module
Provides a framework along with several implementations that allow to perform Query Expansion (QE) with the use of Apache Lucene.
Query Expansion - Adding search terms to a user's search. Query expansion is the process of a search
engine adding search terms to a user's weighted search. The intent is to improve precision and/or recall. The additional terms may be taken from a thesaurus. For example a search for "car" may be expanded to: car cars auto autos automobile automobiles [foldoc.org].
Following modules have been implemented:
Performance
Experiments were conducted on the data from TREC 2004 Robust Track.
Note: This data is provided for reference purposes only. Better performance on the specific data set may not necessary be repeated on the different data sets, etc...
| Tag | Combined Topic Set | ||
| MAP | P10 | %no | |
| Lucene gQE | 0.2332 | 0.3984 | 14% |
| KB-R-FIS gQE | 0.2322 | 0.4076 | 14% |
| Lucene | 0.2 | 0.37 | 15% |
MAP - mean average precision
P10 - average of precision at 10 documents retrieved
%no - percentage of topics with no relevant in the top 10 retrieved
Lucene - unmodified version 1.4.3
Lucene gQE – Lucene system that utilized Rocchio’s query expansion along with Google.
KB-R-FIS gQE – My Fuzzy Inference System that utilized Rocchio’s query expansion along with Google.
To see a demo of a project run 'demo' script at the root of the project.
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