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ISAAC
2001
Springer
112views Algorithms» more  ISAAC 2001»
14 years 3 months ago
On the Complexity of Train Assignment Problems
We consider a problem faced by train companies: How can trains be assigned to satisfy scheduled routes in a cost efficient way? Currently, many railway companies create solutions b...
Thomas Erlebach, Martin Gantenbein, Daniel Hü...
ATMOS
2007
129views Optimization» more  ATMOS 2007»
14 years 9 days ago
Solving a Real-World Train Unit Assignment Problem
We face a real-world train unit assignment problem for an operator running trains in a regional area. Given a set of timetabled train trips, each with a required number of passenge...
Valentina Cacchiani, Alberto Caprara, Paolo Toth
WG
2004
Springer
14 years 4 months ago
The Computational Complexity of the Minimum Weight Processor Assignment Problem
In portable multimedia systems a number of communicating tasks has to be performed on a set of heterogeneous processors. This should be done in an energy-efficient way. We give th...
Hajo Broersma, Daniël Paulusma, Gerard J. M. ...
IWPEC
2009
Springer
14 years 5 months ago
Stable Assignment with Couples: Parameterized Complexity and Local Search
We study the Hospitals/Residents with Couples problem, a variant of the classical Stable Marriage problem. This is the extension of the Hospitals/Residents problem where residents ...
Dániel Marx, Ildikó Schlotter
GLOBECOM
2008
IEEE
14 years 5 months ago
Impact of Constraints on the Complexity of Dynamic Spectrum Assignment
— In this paper we study the complexity of spectrum assignment problems in cognitive radio networks (CRNs) in the presence of several constraints. Although optimal spectrum assig...
Chetan Nanjunda Mathur, Mohamed A. Haleem, Rajarat...