392 search results - page 20 / 79 » Optimal location queries in road network databases |
ADBIS
2009
Springer
14 years 2 months ago
2009
Springer
Abstract. Caching data reduces user-perceived latency and often enhances availability in case of server crashes or network failures. DB caching aims at local processing of declarat...
VLDB
2004
ACM
14 years 29 days ago
2004
ACM
A frequent type of query in spatial networks (e.g., road networks) is to find the K nearest neighbors (KNN) of a given query object. With these networks, the distances between ob...
SIGMOD
2003
ACM
14 years 7 months ago
2003
ACM
In this paper we propose an approach that enables mobile clients to determine the validity of previous queries based on their current locations. In order to make this possible, th...
BTW
2005
Springer
14 years 1 months ago
2005
Springer
: Optimizers in modern DBMSs utilize a cost model to choose an efficient query execution plan (QEP) among all possible ones for a given query. The accuracy of the cost estimates de...
GIS
2010
ACM
13 years 5 months ago
2010
ACM
Social networking applications have become very important web services that provide Internet-based platforms for their users to interact with their friends. With the advances in t...