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PVLDB
2010
225views more  PVLDB 2010»
13 years 5 months ago
Efficient Processing of Top-k Spatial Preference Queries
Top-k spatial preference queries return a ranked set of the k best data objects based on the scores of feature objects in their spatial neighborhood. Despite the wide range of loc...
João B. Rocha-Junior, Akrivi Vlachou, Chris...
ESWS
2011
Springer
13 years 1 months ago
Optimizing Query Shortcuts in RDF Databases
The emergence of the Semantic Web has led to the creation of large semantic knowledge bases, often in the form of RDF databases. Improving the performance of RDF databases necessit...
Vicky Dritsou, Panos Constantopoulos, Antonios Del...
ICML
2008
IEEE
14 years 11 months ago
An asymptotic analysis of generative, discriminative, and pseudolikelihood estimators
Statistical and computational concerns have motivated parameter estimators based on various forms of likelihood, e.g., joint, conditional, and pseudolikelihood. In this paper, we ...
Percy Liang, Michael I. Jordan
ISBI
2004
IEEE
14 years 11 months ago
A Hierarchical Algorithm for Fast Backprojection in Helical Cone-Beam Tomography
Existing algorithms for exact helical cone beam (HCB) tomographic reconstruction involve a 3-D backprojection step, which dominates the the computational cost of the algorithm. We...
Jeffrey Brokish, Yoram Bresler
ICCAD
2005
IEEE
101views Hardware» more  ICCAD 2005»
14 years 7 months ago
FastSies: a fast stochastic integral equation solver for modeling the rough surface effect
In this paper we describe several novel sparsification techniques used in a Fast Stochastic Integral Equation Solver to compute the mean value and the variance of capacitance of ...
Zhenhai Zhu, Jacob K. White