651 search results - page 124 / 131 » Algebraic Query Optimization for Distributed Top-k Queries |
STOC
2001
ACM
14 years 8 months ago
2001
ACM
Histograms are typically used to approximate data distributions. Histograms and related synopsis structures have been successful in a wide variety of popular database applications...
VLDB
2007
ACM
14 years 8 months ago
2007
ACM
Estimating the cardinality (i.e. number of distinct elements) of an arbitrary set expression defined over multiple distributed streams is one of the most fundamental queries of in...
INFOCOM
2009
IEEE
14 years 2 months ago
2009
IEEE
Abstract—Stateless opportunistic forwarding is a simple faulttolerant distributed approach for data delivery and information querying in wireless ad hoc networks, where packets a...
NPC
2004
Springer
14 years 1 months ago
2004
Springer
This paper is motivated by the problem of poor searching efficiency in decentralized peer-to-peer file-sharing systems. We solve the searching problem by considering and modeling t...
MONET
2007
13 years 7 months ago
2007
— This paper proposes a service discovery protocol for sensor networks that is specifically tailored for use in humancentered pervasive environments. It uses the high-level conc...