| Routing under choice of conveyance | ||
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We investigate several typical routing problems in the situation where it may be of some advantage for the travelers to change the conveyances from time to time. In many settings this may not be reduced back to the orginal problem. | |
| People: | Dr. René Brandenberg, Dr. Michael Ritter | |
| Partners: | Institut für Produktionswirtschaft und Logistik, Universität für Bodenkultur Wien |
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| Geometric reconstruction in refraction- and diffraction-based tomography | ||
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Computerized tomography (CT), the process of obtaining the density distribution within a specimen from multiple X-ray projections, has revolutionized diagnostic radiology over the past three decades. While standard CT is based on the principle of absorption, we focus on three novel read more... | |
| People: | Prof. Dr. Peter Gritzmann, Dr. Andreas Alpers | |
| 1st Funding Period: | 5/2011 - 4/2013 | |
| Partners: | Prof. Dr. Franz Pfeiffer (TU München, Germany), Prof. Henning Friis Poulsen (DTU, Denmark) , Prof. Gabor T. Herman (CUNY, USA) , Prof. Rafal Dunin-Borkowski (Research Centre Jülich, Germany) |
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| Geometric and Constrained Clustering: Gravity Bodies and Power Diagrams | ||
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The studies of special geometric bodies tied to constrained clustering of high-dimensional point sets lead to new and improved algorithms for read more... | |
| People: | Prof. Dr. Peter Gritzmann, Dr. Steffen Borgwardt | |
| Partners: | Prof. Dr. Andreas Brieden |
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| Period: | 2005 - today | |
| Optimal Containment | ||
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A central point of this project is the combination of some recent results on so called core-sets with geometric inequalities and typical techniques from combinatorial optimization. We obtained new and significantly faster approximation routines for read more... | |
| People: | Dr. René Brandenberg | |
| Prior Funding: | 5/2005 - 4/2006 | |
| Prizes: | Walther-von-Dyck-prize, December 2006 | |
| Clustering Models and Algorithms for Land Consolidation | ||
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In many agricultural regions, a small number of farmers cultivates a large number of small lots that are scattered over an extended area. Due to this, they have high driving costs, and cannot used heavy machinery profitably. Using methods of combinatorial optimization, mathematical models are derived that do not share the issues of a classical land consolidation process. The central idea is read more... | |
| People: | Prof. Dr. Peter Gritzmann, Dr. Steffen Borgwardt | |
| Partners: | Prof. Dr. Andreas Brieden , Dr. Paul-Michael Rintelen |
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| Period: | 2003 - today | |
| Optimal Slot Scheduling for Long-Term Flight Planning | ||
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Most major airports suffer from restricted capacity, requiring the use of an allocation mechanism for scheduling flight requests. This project investigates means of allocating slots such as to make optimal use of the available capacities. read more... | |
| Partner: | Fraport AG Frankfurt Airport Services Worldwide, Frankfurt | |
| People: | Andreas Brieden, Peter Gritzmann, Matthias Hähre, Gunter Heinrich, Michael Ritter | |
| Duration: | 2003 - 2008 | |
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