829 search results - page 51 / 166 » Location-aware Query Processing and Optimization |
GIS
2006
ACM
14 years 10 months ago
2006
ACM
This paper presents a query optimizer module based on cost estimation that chooses the best filtering step algorithm to perform a specific spatial join operation. A set of express...
SIGMOD
2006
ACM
14 years 9 months ago
2006
ACM
We present our prototype system, OMCAT, which optimizes the reevaluation of a set of pending continuous spatio-temporal queries on trajectory data, when some of the trajectories a...
VLDB
2007
ACM
14 years 9 months ago
2007
ACM
We investigate the problem of how to evaluate efficiently a collection of shortest path queries on massive graphs that are too big to fit in the main memory. To evaluate a shortes...
SEDE
2010
13 years 7 months ago
2010
Enterprise-level applications are becoming complex with the need for event and stream processing, multiple query processing and data analysis over heterogeneous data sources such ...
ADC
2006
Springer
14 years 3 months ago
2006
Springer
Query answering over OWLs and RDFs on the Semantic Web is, in general, a deductive process. To this end, OWL, a family of web ontology languages based on description logic, has be...