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» The Guarding Problem - Complexity and Approximation
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JNS
2010
89views more  JNS 2010»
14 years 11 months ago
The Pattern of Multiple Rings from Morphogenesis in Development
Under certain conditions the problem of morphogenesis in development and the problem of morphology in block copolymers may be reduced to one geometric problem. In two dimensions t...
Xiaosong Kang, Xiaofeng Ren
TEC
2010
193views more  TEC 2010»
14 years 11 months ago
Chemical-Reaction-Inspired Metaheuristic for Optimization
-- We encounter optimization problems in our daily lives and in various research domains. Some of them are so hard that we can, at best, approximate the best solutions with (meta-)...
Albert Y. S. Lam, Victor O. K. Li
ICALP
2005
Springer
15 years 10 months ago
Stochastic Steiner Trees Without a Root
Abstract. This paper considers the Steiner tree problem in the model of twostage stochastic optimization with recourse. This model, the focus of much recent research [1–4], tries...
Anupam Gupta, Martin Pál
SODA
2003
ACM
133views Algorithms» more  SODA 2003»
15 years 6 months ago
Integrality ratio for group Steiner trees and directed steiner trees
The natural relaxation for the Group Steiner Tree problem, as well as for its generalization, the Directed Steiner Tree problem, is a flow-based linear programming relaxation. We...
Eran Halperin, Guy Kortsarz, Robert Krauthgamer, A...
CVPR
2004
IEEE
16 years 7 months ago
Segment-Based Stereo Matching Using Graph Cuts
In this paper, we present a new segment-based stereo matching algorithm using graph cuts. In our approach, the reference image is divided into non-overlapping homogeneous segments...
Li Hong, George Chen