444 search results - page 17 / 89 » Instance optimal query processing in spatial networks |
MOBIDE
2010
ACM
13 years 8 months ago
2010
ACM
Traditional location-based services recommend nearest objects to the user by considering their spatial proximity. However, an object not only has its distance but also has its dir...
DCOSS
2008
Springer
13 years 10 months ago
2008
Springer
Sensor networks can be viewed as large distributed databases, and SQL-like high-level declarative languages can be used for data and information retrieval. Energy constraints make ...
JCP
2008
13 years 8 months ago
2008
In sensor networks, continuous query is commonly used for collecting periodical data from the objects under monitoring. This sort of queries needs to be carefully designed, in orde...
DLOG
1997
13 years 9 months ago
1997
Abstract: This paper presents a theoretical basis for terminological reasoning about objects and their qualitative spatial relationships. In contrast to existing work, which mainly...
GIS
2010
ACM
13 years 6 months ago
2010
ACM
Spatial Alarms are reminders for mobile users upon their arrival of certain spatial location of interest. Spatial alarm processing requires meeting two demanding objectives: high ...