5954 search results - page 291 / 1191 » Querying Bi-level Information |
185
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ICEIS
2009
IEEE
16 years 1 months ago
2009
IEEE
In an information retrieval system, a thesaurus can be used for query expansion, i.e. adding words to queries in order to improve recall. We propose a semi-automatic and interactiv...
158
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ICDIM
2007
IEEE
16 years 1 months ago
2007
IEEE
: In this paper, we propose a method for retrieving products that match users’ search queries written in natural language. We use a large amount of product reviews written by con...
181
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SIGIR
2005
ACM
16 years 9 days ago
2005
ACM
We describe a method for predicting query difficulty in a precision-oriented web search task. Our approach uses visual features from retrieved surrogate document representations (...
201
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CCS
2008
ACM
15 years 8 months ago
2008
ACM
We propose an approach for the selective enforcement of access control restrictions in, possibly distributed, large data collections based on two basic concepts: i) flexible autho...
173
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IJCSA
2007
15 years 6 months ago
2007
Preference-based queries often referred to as skyline queries play an important role in cooperative query processing. However, their prohibitive result sizes pose a severe challen...