2514 search results - page 307 / 503 » On the Computation of Approximations of Database Queries |
182
click to vote
MDM
2007
Springer
16 years 27 days ago
2007
Springer
This work tackles the problem of answer-aggregation for continuous spatio-temporal range queries in distributed settings. We assume a grid-like coverage of the spatial universe of...
179
click to vote
AMW
2009
15 years 8 months ago
2009
Abstract. Rewriting of conjunctive queries using views has many applications in database and data integration. We investigate ways to improve performance of rewriting and propose a...
178
click to vote
GIS
2010
ACM
15 years 5 months ago
2010
ACM
Top-k queries are a popular type of query in Wireless Sensor Networks. Typical solutions rely on coordinated root-tonodes and nodes-to-root messages and on maintaining filters at...
197
click to vote
JSS
2006
15 years 6 months ago
2006
Recent progress of computer and network technologies makes it possible to store and retrieve a large volume of multimedia data in many applications. In such applications, efficien...
188
click to vote
EDBT
2000
ACM
15 years 10 months ago
2000
ACM
The MIX mediator systems incorporates a novel framework for navigation-driven evaluation of virtual mediated views. Its architecture allows the on-demand computation of views and q...