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SEMWEB
2010
Springer
15 years 4 months ago
SPARQL Query Optimization on Top of DHTs
We study the problem of SPARQL query optimization on top of distributed hash tables. Existing works on SPARQL query processing in such environments have never been implemented in a...
Zoi Kaoudi, Kostis Kyzirakos, Manolis Koubarakis
JDCTA
2010
272views more  JDCTA 2010»
15 years 1 months ago
Optimal Control of Nonlinear Systems Using the Homotopy Perturbation Method: Infinite Horizon Case
This paper presents a new method for solving a class of infinite horizon nonlinear optimal control problems. In this method, first the original optimal control problem is transfor...
Amin Jajarmi, Hamidreza Ramezanpour, Arman Sargolz...
GCC
2007
Springer
16 years 24 days ago
Dynamic Data Replication based on Local Optimization Principle in Data Grid
Efficient data access is one way of improving the performance of the Data Grid. In order to speed up the data access and reduce bandwidth consumption, Data Grid replicates essenti...
Yulai Yuan, Yongwei Wu, Guangwen Yang, Feng Yu
ASPDAC
2007
ACM
96views Hardware» more  ASPDAC 2007»
15 years 10 months ago
Hierarchical Optimization Methodology for Wideband Low Noise Amplifiers
In this paper, we present a systematic synthesis methodology for fully integrated wideband low noise amplifiers that simultaneously optimizes impedance matching, noise figure, and ...
Arthur Nieuwoudt, Tamer Ragheb, Yehia Massoud
VLDB
1991
ACM
134views Database» more  VLDB 1991»
15 years 10 months ago
Extending the Search Strategy in a Query Optimizer
In order to cope efficiently with simple or complex queries as well as different application requirements (e.g., ad-hoc versus repetitive queries), a query optimizer ought to supp...
Rosana S. G. Lanzelotte, Patrick Valduriez