massive query expansion by exploiting graph properties
Post on 18-Jan-2016
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Massive Query Expansionby
Exploiting Graph Properties
Joan Guisado-GámezJosep Lluís Larriba PeyDavid Domínguez Sal
www.dama.upc.edu2/8
PROBLEM IN INFORMATION RETRIEVAL
Query = “colored Volkswagen beetles”
www.dama.upc.edu3/8
BRIEF INTRODUCTION
Process of transforming QO into QE
Detect expansion features (terms/phrases)
What kind of expansion features?
How to obtain the expansion features?
www.dama.upc.edu4/8
TOPOLOGICAL QUERY EXPANSION
Query = “colored Volkswagen beetles”
Context = “any model of Volkswagen beetles car of any color and year”
www.dama.upc.edu5/8
EXPANSION FEATURES
Most important extension Features:
“Volkswagen beetle”, “Volkswagen fusca”, “VW type 1”, “Volkswagen 1200”, “Volkswagen bug”, “Volkswagen super bug”, “VW bug”,”VW Käfer”
“Volkswagen new Beetle”
“Baja bug”
“Volkswagen group”, “VW group”
H-Shifter, engine, car, automobile,….
Query = “colored Volkswagen beetles”
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SOME RESULTSQuery = “colored Volkswagen beetles”
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CONCLUSIONS
Achieves good results allowing to identify new concepts.
Precision improves up to 27%
Orthogonal to linguistic techniques.
Outperforms pseudo-relevance feedback techniques.
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THANK YOU
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