79 search results - page 12 / 16 » Optimizing Queries on Compressed Bitmaps |
ICDE
2003
IEEE
14 years 9 months ago
2003
IEEE
We are interested in capturing time series generated by small wireless electronic sensors. Battery-operated sensors must avoid heavy use of their wireless radio which is a key cau...
SIGMOD
2009
ACM
14 years 7 months ago
2009
ACM
Reachability queries on large directed graphs have attracted much attention recently. The existing work either uses spanning structures, such as chains or trees, to compress the c...
SSD
2005
Springer
14 years 1 months ago
2005
Springer
Abstract. Query optimization is an important functionality of modern database systems and often based on estimating the selectivity of queries before actually executing them. Well-...
IPSN
2009
Springer
14 years 2 months ago
2009
Springer
In this work we present new in-network techniques for communication efficient approximate query processing in wireless sensornets. We use a model-based approach that constructs a...
VLDB
2004
ACM
14 years 1 months ago
2004
ACM
Large boolean matrices are a basic representational unit in a variety of applications, with some notable examples being interactive visualization systems, mining large graph struc...