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» Approximating Extended Answer Sets
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EPIA
1995
Springer
15 years 1 months ago
The Retrieval Problem in a Concept Language with Number Restrictions
In this paper, we study the retrieval problem in ALN, which is a tractable concept language with number restrictions. Following the approach proposed in [12], this work differs fr...
Aida Vitória, Margarida Mamede, Luís...
VLDB
2011
ACM
245views Database» more  VLDB 2011»
14 years 4 months ago
Normalization and optimization of schema mappings
Schema mappings are high-level specifications that describe the relationship between two database schemas. They are an important tool in several areas of database research, notab...
Georg Gottlob, Reinhard Pichler, Vadim Savenkov
FOCS
2002
IEEE
15 years 2 months ago
A Constant-Factor Approximation Algorithm for the Multicommodity
We present the first constant-factor approximation algorithm for network design with multiple commodities and economies of scale. We consider the rent-or-buy problem, a type of m...
Amit Kumar, Anupam Gupta, Tim Roughgarden
ECCV
2010
Springer
15 years 3 months ago
Fast Approximate Nearest Neighbor Methods for Non-Euclidean Manifolds with Applications to Human Activity Analysis in Videos
Approximate Nearest Neighbor (ANN) methods such as Locality Sensitive Hashing, Semantic Hashing, and Spectral Hashing, provide computationally ecient procedures for nding objects...
Rizwan Chaudhry, Yuri Ivanov
WEA
2004
Springer
150views Algorithms» more  WEA 2004»
15 years 3 months ago
Increased Bit-Parallelism for Approximate String Matching
Abstract. Bit-parallelism permits executing several operations simultaneously over a set of bits or numbers stored in a single computer word. This technique permits searching for t...
Heikki Hyyrö, Kimmo Fredriksson, Gonzalo Nava...