14248 search results - page 40 / 2850 » Queries |
CIKM
2010
Springer
13 years 7 months ago
2010
Springer
Marking up queries with annotations such as part-of-speech tags, capitalization, and segmentation, is an important part of many approaches to query processing and understanding. D...
PVLDB
2010
13 years 7 months ago
2010
This paper addresses the problem of explaining missing answers in queries that include selection, projection, join, union, aggregation and grouping (SPJUA). Explaining missing ans...
SEMWEB
2010
Springer
13 years 6 months ago
2010
Springer
We study the problem of SPARQL query optimization on top of distributed hash tables. Existing works on SPARQL query processing in such environments have never been implemented in a...
ECIR
2009
Springer
13 years 6 months ago
2009
Springer
Query expansion is an effective technique in improving the retrieval performance for ad-hoc retrieval. However, query expansion can also fail, leading to a degradation of the retri...
DEXA
2003
Springer
14 years 2 months ago
2003
Springer
: We demonstrate an approach to transform keyword queries automatically into queries that combine keywords appropriately by boolean operations, such as and and or. Our approach is ...