237 search results - page 30 / 48 » Querying RDF Data from a Graph Database Perspective |
INFOCOM
2011
IEEE
12 years 11 months ago
2011
IEEE
—Top-k query has long been an important topic in many fields of computer science. Efficient implementation of the top-k queries is the key for information searching. With the n...
DEXA
2004
Springer
14 years 29 days ago
2004
Springer
Much work has been done on characterizing the workload of a database system. Previous studies focused on providing different types of statistical summaries, and modeling the run-ti...
XSYM
2004
Springer
14 years 27 days ago
2004
Springer
A key step in the optimization of declarative queries over XML data is estimating the selectivity of path expressions, i.e., the number of elements reached by a specific navigatio...
SIGMOD
2010
ACM
14 years 11 days ago
2010
ACM
In this paper, we propose an online aggregation system called COSMOS (Continuous Sampling for Multiple queries in an Online aggregation System), to process multiple aggregate quer...
IDEAS
2003
IEEE
14 years 25 days ago
2003
IEEE
In recent years, a lot of research effort has been dedicated to the management of Quality of Service (QoS), mainly in the fields of telecommunication networks and multimedia syste...