641 search results - page 79 / 129 » Studying Query Expansion Effectiveness |
CCGRID
2007
IEEE
14 years 4 months ago
2007
IEEE
Query-load (forwarding and answering) balancing in structured overlays is one of the most critical and least studied problems. It has been assumed that caching heuristics can take...
GEOINFORMATICA
2007
13 years 10 months ago
2007
Nearest Neighbor (NN) search has been in the core of spatial and spatiotemporal database research during the last decade. The literature on NN query processing algorithms so far d...
WWW
2009
ACM
14 years 10 months ago
2009
ACM
In a traditional keyword-search system in XML data, a user composes a keyword query, submits it to the system, and retrieves relevant subtrees. In the case where the user has limi...
SIGMOD
2009
ACM
14 years 10 months ago
2009
ACM
With the proliferation of the RDF data format, engines for RDF query processing are faced with very large graphs that contain hundreds of millions of RDF triples. This paper addre...
SIGMOD
2006
ACM
14 years 10 months ago
2006
ACM
This paper introduces the Tuple Graph (TuG) synopses, a new class of data summaries that enable accurate selectivity estimates for complex relational queries. The proposed summari...