2 Search Results for "Schuelldorf, Hanno"


Document
Optimization at Deutsche Bahn: Aspects and Examples

Authors: Hanno Schuelldorf

Published in: Dagstuhl Seminar Proceedings, Volume 9261, Models and Algorithms for Optimization in Logistics (2009)


Abstract
For large transportation companies like Deutsche Bahn, process optimization has always been an important task to reduce production costs and obtain a better position in competition. Applying methods of mathematical optimization in practice often is rather difficult though, which may lead to some unique constraints that could make the optimization process rather hard. This contribution shall discuss some practical issues for mathematical optimization at Deutsche Bahn and will give some examples.

Cite as

Hanno Schuelldorf. Optimization at Deutsche Bahn: Aspects and Examples. In Models and Algorithms for Optimization in Logistics. Dagstuhl Seminar Proceedings, Volume 9261, pp. 1-6, Schloss Dagstuhl - Leibniz-Zentrum für Informatik (2009)


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@InProceedings{schuelldorf:DagSemProc.09261.21,
  author =	{Schuelldorf, Hanno},
  title =	{{Optimization at Deutsche Bahn: Aspects and Examples}},
  booktitle =	{Models and Algorithms for Optimization in Logistics},
  pages =	{1--6},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2009},
  volume =	{9261},
  editor =	{Cynthia Barnhart and Uwe Clausen and Ulrich Lauther and Rolf H. M\"{o}hring},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DagSemProc.09261.21},
  URN =		{urn:nbn:de:0030-drops-21749},
  doi =		{10.4230/DagSemProc.09261.21},
  annote =	{Keywords: Deutsche Bahn, simulation, optimzation, practical aspects}
}
Document
Routing Cars in Rail Freight Service

Authors: Armin Fügenschuh, Henning Homfeld, and Hanno Schuelldorf

Published in: Dagstuhl Seminar Proceedings, Volume 9261, Models and Algorithms for Optimization in Logistics (2009)


Abstract
Cars in rail freight services at Deutsche Bahn follow prescribed routes from their origin via intermediate shunting yards to their destination. The main goal in designing such routes is to reduce the number of trains and their travel distances. Various real-world capacity constraints make the problem difficult to formulate and also to solve. We present MILP and MINLP models for this problem based on multicommodity flows and arborescences. We compare these formulations using test- and real-world data.

Cite as

Armin Fügenschuh, Henning Homfeld, and Hanno Schuelldorf. Routing Cars in Rail Freight Service. In Models and Algorithms for Optimization in Logistics. Dagstuhl Seminar Proceedings, Volume 9261, pp. 1-10, Schloss Dagstuhl - Leibniz-Zentrum für Informatik (2009)


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@InProceedings{fugenschuh_et_al:DagSemProc.09261.25,
  author =	{F\"{u}genschuh, Armin and Homfeld, Henning and Schuelldorf, Hanno},
  title =	{{Routing Cars in Rail Freight Service}},
  booktitle =	{Models and Algorithms for Optimization in Logistics},
  pages =	{1--10},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2009},
  volume =	{9261},
  editor =	{Cynthia Barnhart and Uwe Clausen and Ulrich Lauther and Rolf H. M\"{o}hring},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DagSemProc.09261.25},
  URN =		{urn:nbn:de:0030-drops-21848},
  doi =		{10.4230/DagSemProc.09261.25},
  annote =	{Keywords: Mixed-Integer Programming, Branch-and-Cut, Logistics, Routing and Scheduling}
}
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