651 search results - page 109 / 131 » Algebraic Query Optimization for Distributed Top-k Queries |
WWW
2008
ACM
14 years 9 months ago
2008
ACM
Current search mechanisms of DHT-based P2P systems can well handle a single keyword search problem. Other than single keyword search, multi-keyword search is quite popular and use...
STOC
2002
ACM
14 years 9 months ago
2002
ACM
We present improved algorithms for maintaining transitive closure and all-pairs shortest paths/distances in a digraph under deletion of edges. For the problem of transitive closur...
ICDM
2010
IEEE
13 years 7 months ago
2010
IEEE
-- Temporal data are time-critical in that the snapshot at each timestamp must be made available to researchers in a timely fashion. However, due to the limited data, each snapshot...
SIGIR
2009
ACM
14 years 3 months ago
2009
ACM
Pseudo relevance feedback (PRF), which has been widely applied in IR, aims to derive a distribution from the top n pseudo relevant documents D. However, these documents are often ...
ATAL
2007
Springer
14 years 3 months ago
2007
Springer
In this paper we consider the problem of managing and exploiting schedules in an uncertain and distributed environment. We assume a team of collaborative agents, each responsible ...