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» Space Complexity vs. Query Complexity
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VLDB
1997
ACM
140views Database» more  VLDB 1997»
14 years 1 months ago
Parallel Query Scheduling and Optimization with Time- and Space-Shared Resources
Scheduling query execution plans is a particularly complex problem in hierarchical parallel systems, where each site consists of a collection of local time-shared (e.g., CPU(s) or...
Minos N. Garofalakis, Yannis E. Ioannidis
SAC
2008
ACM
13 years 8 months ago
Data sharing vs. message passing: synergy or incompatibility?: an implementation-driven case study
One reasonable categorization of coordination models is into data sharing or message passing, based on whether the information necessary to coordination is persistently stored and...
Matteo Ceriotti, Amy L. Murphy, Gian Pietro Picco
CEC
2010
IEEE
13 years 11 months ago
Two novel Ant Colony Optimization approaches for Bayesian network structure learning
Learning Bayesian networks from data is an N-P hard problem with important practical applications. Several researchers have designed algorithms to overcome the computational comple...
Yanghui Wu, John A. W. McCall, David W. Corne
IFIP
2004
Springer
14 years 3 months ago
On Complexity of Model-Checking for the TQL Logic
In this paper we study the complexity of the model-checking problem for the tree logic introduced as the basis for the query language TQL [Cardelli and Ghelli, 2001]. We define tw...
Iovka Boneva, Jean-Marc Talbot
ICDE
1996
IEEE
103views Database» more  ICDE 1996»
14 years 11 months ago
Using Partial Differencing for Efficient Monitoring of Deferred Complex Rule Conditions
This paper presents a difference calculus for determining changes to rule conditions in an active DBMS. The calculus has been used for implementing an algorithm to efficiently mon...
Martin Sköld, Tore Risch