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SIGMOD
2005
ACM
145views Database» more  SIGMOD 2005»
16 years 3 months ago
Stratified Computation of Skylines with Partially-Ordered Domains
In this paper, we study the evaluation of skyline queries with partially-ordered attributes. Because such attributes lack a total ordering, traditional index-based evaluation algo...
Chee Yong Chan, Pin-Kwang Eng, Kian-Lee Tan
CORR
2006
Springer
107views Education» more  CORR 2006»
15 years 3 months ago
Dense Gaussian Sensor Networks: Minimum Achievable Distortion and the Order Optimality of Separation
We investigate the optimal performance of dense sensor networks by studying the joint source-channel coding problem. The overall goal of the sensor network is to take measurements...
Nan Liu, Sennur Ulukus
ICDE
2007
IEEE
185views Database» more  ICDE 2007»
16 years 4 months ago
On k-Nearest Neighbor Searching in Non-Ordered Discrete Data Spaces
A k-nearest neighbor (k-NN) query retrieves k objects from a database that are considered to be the closest to a given query point. Numerous techniques have been proposed in the p...
Dashiell Kolbe, Qiang Zhu, Sakti Pramanik
PODS
2004
ACM
158views Database» more  PODS 2004»
16 years 3 months ago
Composing Schema Mappings: Second-Order Dependencies to the Rescue
A schema mapping is a specification that describes how data structured under one schema (the source schema) is to be transformed into data structured under a different schema (the...
Ronald Fagin, Phokion G. Kolaitis, Lucian Popa, Wa...
DOCENG
2009
ACM
15 years 9 months ago
Annotations with EARMARK for arbitrary, overlapping and out-of order markup
In this paper we propose a novel approach to markup, called Extreme Annotational RDF Markup (EARMARK), using RDF and OWL to annotate features in text content that cannot be mapped...
Silvio Peroni, Fabio Vitali