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» Optimized Query Evaluation Using Cooperative Sorts
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SEMWEB
2010
Springer
13 years 5 months ago
Using Reformulation Trees to Optimize Queries over Distributed Heterogeneous Sources
Abstract. In order to effectively and quickly answer queries in environments with distributed RDF/OWL, we present a query optimization algorithm to identify the potentially relevan...
Yingjie Li, Jeff Heflin
DASFAA
2010
IEEE
176views Database» more  DASFAA 2010»
13 years 7 months ago
Efficient Database-Driven Evaluation of Security Clearance for Federated Access Control of Dynamic XML Documents
Achieving data security over cooperating web services is becoming a reality, but existing XML access control architectures do not consider this federated service computing. In this...
Erwin Leonardi, Sourav S. Bhowmick, Mizuho Iwaihar...
ATAL
2008
Springer
13 years 9 months ago
Cooperative search for optimizing pipeline operations
We present an application of a multi-agent cooperative search approach to the problem of optimizing gas pipeline operations, i.e. finding control parameters for a gas transmission...
T. Mora, Abu B. Sesay, Jörg Denzinger, Hossei...
EDBT
2010
ACM
189views Database» more  EDBT 2010»
14 years 15 days ago
Efficient physical operators for cost-based XPath execution
The creation of a generic and modular query optimization and processing infrastructure can provide significant benefits to XML data management. Key pieces of such an infrastructur...
Haris Georgiadis, Minas Charalambides, Vasilis Vas...
CEC
2008
IEEE
13 years 9 months ago
Multilevel cooperative coevolution for large scale optimization
In this paper, we propose a multilevel cooperative coevolution (MLCC) framework for large scale optimization problems. The motivation is to improve our previous work on grouping ba...
Zhenyu Yang, Ke Tang, Xin Yao