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ALGORITHMICA
2010
104views more  ALGORITHMICA 2010»
15 years 4 months ago
Fixed-Parameter Approximation: Conceptual Framework and Approximability Results
The notion of fixed-parameter approximation is introduced to investigate the approximability of optimization problems within the framework of fixed-parameter computation. This work...
Liming Cai, Xiuzhen Huang
EOR
2007
147views more  EOR 2007»
15 years 4 months ago
Routing and wavelength assignment in optical networks using bin packing based algorithms
This paper addresses the problem of routing and wavelength assignment (RWA) of static lightpath requests in wavelength routed optical networks. The objective is to minimize the nu...
Nina Skorin-Kapov
ATMOS
2010
150views Optimization» more  ATMOS 2010»
15 years 3 months ago
Dynamic Graph Generation and Dynamic Rolling Horizon Techniques in Large Scale Train Timetabling
The aim of the train timetabling problem is to find a conflict free timetable for a set of passenger and freight trains along their routes in an infrastructure network. Several ...
Frank Fischer, Christoph Helmberg
SBIA
2010
Springer
15 years 3 months ago
High-Level Modeling of Component-Based CSPs
Most of modern constraint modeling languages combine rich constraint languages with mathematical notations to tackle combinatorial optimization problems. Our purpose is to introduc...
Raphaël Chenouard, Laurent Granvilliers, Rica...
ICMCS
2009
IEEE
132views Multimedia» more  ICMCS 2009»
15 years 2 months ago
Video face recognition with graph-based semi-supervised learning
We consider the problem of classification of multiple observations of the same object, possibly under different transformations. We view this problem as a special case of semi-sup...
Effrosini Kokiopoulou, Pascal Frossard