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APPROX
2009
Springer
131views Algorithms» more  APPROX 2009»
16 years 1 months ago
An Approximation Scheme for Terrain Guarding
We obtain a polynomial time approximation scheme for the terrain guarding problem improving upon several recent constant factor approximations. Our algorithm is a local search algo...
Matt Gibson, Gaurav Kanade, Erik Krohn, Kasturi R....
EUROCAST
2009
Springer
143views Hardware» more  EUROCAST 2009»
16 years 1 months ago
Fitting Rectangular Signals to Time Series Data by Metaheuristic Algorithms
Abstract. In this work we consider the application of metaheuristic algorithms to the problem of fitting rectangular signals to time-data series. The application background is to ...
Andreas M. Chwatal, Günther R. Raidl
223
Voted
SCIA
2009
Springer
130views Image Analysis» more  SCIA 2009»
16 years 1 months ago
Improving Automatic Video Retrieval with Semantic Concept Detection
We study the usefulness of intermediate semantic concepts in bridging the semantic gap in automatic video retrieval. The results of a series of large-scale retrieval experiments, w...
Markus Koskela, Mats Sjöberg, Jorma Laaksonen
213
Voted
SPIRE
2009
Springer
16 years 1 months ago
A Last-Resort Semantic Cache for Web Queries
We propose a method to evaluate queries using a last-resort semantic cache in a distributed Web search engine. The cache stores a group of frequent queries and for each of these qu...
Flavio Ferrarotti, Mauricio Marín, Marcelo ...
188
Voted
AINA
2008
IEEE
16 years 1 months ago
Developing of an Ontological Focused-Crawler for Ubiquitous Services
This paper proposes the use of several ontological techniques to provide a semantic level solution for a search agent so that it can provide fast, precise, and stable search resul...
Sheng-Yuan Yang