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» Unnesting Arbitrary Queries
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IDEAS
2002
IEEE
135views Database» more  IDEAS 2002»
14 years 2 months ago
On Implicate Discovery and Query Optimization
Boolean expression simplification is a well-known problem in the history of Computer Science. The problem of determining prime implicates from an arbitrary Boolean expression has...
Kristofer Vorwerk, G. N. Paulley
DASFAA
2007
IEEE
141views Database» more  DASFAA 2007»
14 years 1 months ago
An Efficient Index Lattice for XML Query Evaluation
Abstract. We have defined an XML structural index called the Structure Index Tree (SIT), which eliminates duplicate structures arising from the equivalent subtrees in an XML docume...
Wilfred Ng, James Cheng
VLDB
2007
ACM
169views Database» more  VLDB 2007»
14 years 10 months ago
Peer-to-Peer Similarity Search in Metric Spaces
This paper addresses the efficient processing of similarity queries in metric spaces, where data is horizontally distributed across a P2P network. The proposed approach does not r...
Christos Doulkeridis, Akrivi Vlachou, Yannis Kotid...
CVPR
1997
IEEE
14 years 2 months ago
FOCUS: Searching for Multi-colored Objects in a Diverse Image Database
We describe a new multi-phase, color-based image retrieval system, FOCUS Fast Object Color-based qUery System, with an online user interface which is capable of identifying mult...
Madirakshi Das, Edward M. Riseman, Bruce A. Draper
KR
1992
Springer
14 years 2 months ago
Learning Useful Horn Approximations
While the task of answering queries from an arbitrary propositional theory is intractable in general, it can typicallybe performed e ciently if the theory is Horn. This suggests t...
Russell Greiner, Dale Schuurmans