36 search results - page 7 / 8 » Exact and Approximate Aggregation in Constraint Query |
SENSYS
2003
ACM
13 years 10 months ago
2003
ACM
Sensor networks promise viable solutions to many monitoring problems. However, the practical deployment of sensor networks faces many challenges imposed by real-world demands. Sen...
SIGMOD
2003
ACM
14 years 5 months ago
2003
ACM
We consider the problem of approximating sliding window joins over data streams in a data stream processing system with limited resources. In our model, we deal with resource cons...
ICDE
2010
IEEE
14 years 5 months ago
2010
IEEE
Estimation via sampling out of highly selective join queries is well known to be problematic, most notably in online aggregation. Without goal-directed sampling strategies, samples...
SIGMOD
2003
ACM
14 years 5 months ago
2003
ACM
The Aurora system [1] is an experimental data stream management system with a fully functional prototype. It includes both a graphical development environment, and a runtime syste...
ESA
2010
Springer
13 years 6 months ago
2010
Springer
We study the problem of estimating the average of a Lipschitz continuous function f defined over a metric space, by querying f at only a single point. More specifically, we explore...