950 search results - page 90 / 190 » Evaluation over thousands of queries |
ICDE
2005
IEEE
14 years 11 months ago
2005
IEEE
We address the problem of executing continuous multiway join queries in unpredictable and volatile environments. Our query class captures windowed join queries in data stream syst...
VLDB
2005
ACM
14 years 3 months ago
2005
ACM
Multi-join queries are the core of any integration service that integrates data from multiple distributed data sources. Due to the large number of data sources and possibly high v...
EDBT
2006
ACM
14 years 10 months ago
2006
ACM
Abstract. Many different index structures have been proposed for spatial databases to support efficient query processing. However, most of these index structures suffer from an exp...
EDBT
2004
ACM
14 years 3 months ago
2004
ACM
Abstract. We present a cost-based adaptive clustering method to improve average performance of spatial queries (intersection, containment, enclosure queries) over large collections...
CIKM
2009
Springer
14 years 3 months ago
2009
Springer
This paper presents an overview of our framework for searching and retrieving facts and relationships within natural language text sources. In this framework, an extraction task o...