78 search results - page 13 / 16 » Progressive Query Optimization for Federated Queries |
DEXAW
2009
IEEE
15 years 4 months ago
2009
IEEE
—In this paper RDFStats is introduced, which is a generator for statistics of RDF sources like SPARQL endpoints and RDF documents. RDFStats does not only provide a statistics gen...
ML
2007
ACM
14 years 9 months ago
2007
ACM
We prove new lower bounds for learning intersections of halfspaces, one of the most important concept classes in computational learning theory. Our main result is that any statist...
AP2PC
2003
Springer
15 years 2 months ago
2003
Springer
The objective of query optimizers is to select a good execution plan for a given query. In a distributed system, it is crucial for a query optimizer to have effective remote cost e...
70
Voted
SODA
2004
ACM
14 years 11 months ago
2004
ACM
d Abstract] Robert Krauthgamer James R. Lee We present a simple deterministic data structure for maintaining a set S of points in a general metric space, while supporting proximit...
BROADNETS
2004
IEEE
15 years 1 months ago
2004
IEEE
One important application of wireless sensor networks is tracking moving objects. The recent progress has made it possible for tiny sensors to have more computing power and storag...