14548 search results - page 2828 / 2910 » The Optimal Path-Matching Problem |
SIGMOD
2009
ACM
14 years 10 months ago
2009
ACM
Research has investigated mappings among data sources under two perspectives. On one side, there are studies of practical tools for schema mapping generation; these focus on algor...
SIGMOD
2009
ACM
14 years 10 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...
SIGMOD
2002
ACM
14 years 10 months ago
2002
ACM
The widespread distribution and availability of smallscale sensors, actuators, and embedded processors is transforming the physical world into a computing platform. One such examp...
SIGMOD
2002
ACM
14 years 10 months ago
2002
ACM
This paper addresses the problem of evaluating ranked top-? queries with expensive predicates. As major DBMSs now all support expensive user-defined predicates for Boolean queries...
SIGMOD
2001
ACM
14 years 10 months ago
2001
ACM
Approximating the joint data distribution of a multi-dimensional data set through a compact and accurate histogram synopsis is a fundamental problem arising in numerous practical ...