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PVLDB
2010
123views more  PVLDB 2010»
13 years 8 months ago
Sharing-Aware Horizontal Partitioning for Exploiting Correlations During Query Processing
Optimization of join queries based on average selectivities is suboptimal in highly correlated databases. In such databases, relations are naturally divided into partitions, each ...
Kostas Tzoumas, Amol Deshpande, Christian S. Jense...
ITCC
2002
IEEE
14 years 2 months ago
Performance of KDB-Trees with Query-Based Splitting
While the persistent data of many advanced database applications, such as OLAP and scientific studies, are characterized by very high dimensionality, typical queries posed on thes...
Yves Lépouchard, John L. Pfaltz, Ratko Orla...
CIKM
2001
Springer
14 years 2 months ago
Query-Sensitive Similarity Measures for the Calculation of Interdocument Relationships
The application of document clustering to information retrieval has been motivated by the potential effectiveness gains postulated by the Cluster Hypothesis. The hypothesis states ...
Anastasios Tombros, C. J. van Rijsbergen
DBPL
2001
Springer
115views Database» more  DBPL 2001»
14 years 2 months ago
Optimization Properties for Classes of Conjunctive Regular Path Queries
Abstract. We are interested in the theoretical foundations of the optimization of conjunctive regular path queries (CRPQs). The basic problem here is deciding query containment bot...
Alin Deutsch, Val Tannen
SIGIR
2002
ACM
13 years 9 months ago
Comparing cross-language query expansion techniques by degrading translation resources
The quality of translation resources is arguably the most important factor affecting the performance of a cross-language information retrieval system. While many investigations ha...
Paul McNamee, James Mayfield