517 search results - page 21 / 104 » Efficient Computation of Diverse Query Results |
SIGMOD
2007
ACM
14 years 7 months ago
2007
ACM
The family of threshold algorithm (i.e., TA) has been widely studied for efficiently computing top-k queries. TA uses a sort-merge framework that assumes data lists are pre-sorted...
ICEIS
2006
IEEE
14 years 1 months ago
2006
IEEE
The satisfiability test checks, whether or not the evaluation of a query returns the empty set for any input document, and can be used in query optimization for avoiding the submis...
DASFAA
2010
IEEE
13 years 7 months ago
2010
IEEE
Achieving data security over cooperating web services is becoming a reality, but existing XML access control architectures do not consider this federated service computing. In this...
SIGMOD
2003
ACM
14 years 7 months ago
2003
ACM
The challenge of peer-to-peer computing goes beyond simple file sharing. In the DBGlobe project, we view the multitude of peers carrying data and services as a superdatabase. Our ...
SIGMOD
2003
ACM
14 years 7 months ago
2003
ACM
Like HTML, many XML documents are resident on native file systems. Since XML data is irregular and verbose, the disk space and the network bandwidth are wasted. To overcome the ve...