491 search results - page 80 / 99 » Optimizing complex queries with multiple relation instances |
SIGMOD
2010
ACM
14 years 11 days ago
2010
ACM
Online aggregation is a promising solution to achieving fast early responses for interactive ad-hoc queries that compute aggregates on a large amount of data. Essential to the suc...
VLDB
2007
ACM
14 years 7 months ago
2007
ACM
We propose XRPC, a minimal XQuery extension that enables distributed yet efficient querying of heterogeneous XQuery data sources. XRPC enhances the existing concept of XQuery func...
ICCV
2003
IEEE
14 years 9 months ago
2003
IEEE
We propose modeling images and related visual objects as bags of pixels or sets of vectors. For instance, gray scale images are modeled as a collection or bag of (X, Y, I) pixel v...
TPDS
2008
13 years 7 months ago
2008
In this paper, we discuss and compare several policies to place replicas in tree networks, subject to server capacity and Quality of Service (QoS) constraints. The client requests ...
ICWE
2005
Springer
14 years 1 months ago
2005
Springer
There is an apparent need for specifying the integration of multiple knowledge sources during the design of Web Information Systems (WIS) where the actual data is often retrieved f...