1168 search results - page 198 / 234 » Optimization strategies for complex queries |
IDEAS
2007
IEEE
14 years 4 months ago
2007
IEEE
Historically, bitmap indexing has provided an important database capability to accelerate queries. However, only a few database systems have implemented these indexes because of t...
VLDB
1992
ACM
14 years 1 months ago
1992
ACM
This paper evaluates the performance of the parallel, main-memory DBMS, PRISMA/DB. First, an architecture for parallel query execution is presented. A performance model for the ex...
CIKM
2010
Springer
13 years 8 months ago
2010
Springer
We consider the problem of learning to rank relevant and novel documents so as to directly maximize a performance metric called Expected Global Utility (EGU), which has several de...
MIDDLEWARE
2007
Springer
14 years 3 months ago
2007
Springer
Many wireless sensor network protocols are employing gossipbased message dissemination, where nodes probabilistically forward messages, to reduce message overhead. We are concerne...
ATAL
2007
Springer
14 years 1 months ago
2007
Springer
Multi-Agent Agreement problems (MAP) - the ability of a population of agents to search out and converge on a common state - are central issues in many multi-agent settings, from d...