525 search results - page 19 / 105 » On Query Algebras for Probabilistic Databases |
EDBT
2006
ACM
14 years 7 months ago
2006
ACM
Abstract. We present in this paper a new model for representing probabilistic information in a semi-structured (XML) database, based on the use of probabilistic event variables. Th...
MDM
2005
Springer
14 years 27 days ago
2005
Springer
In this paper we propose a query-driven approach for tuning the time/energy trade-off in sensor networks with mobile sensors. The tuning factors include re-positioning of mobile s...
AMAI
2007
Springer
13 years 7 months ago
2007
Springer
We present here a formal foundation for an iterative and incremental approach to constructing and evaluating preference queries. Our main focus is query modification: a query tran...
SIGMOD
2012
ACM
11 years 10 months ago
2012
ACM
While extensive work has been done on evaluating queries over tuple-independent probabilistic databases, query evaluation over correlated data has received much less attention eve...
VLDB
2005
ACM
14 years 27 days ago
2005
ACM
In many systems, sensors are used to acquire information from external environments such as temperature, pressure and locations. Due to continuous changes in these values, and lim...