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检索条件"任意字段=5th Workshop on Algorithmic Methods and Models for Optimization of Railways, ATMOS 2005"

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5th workshop on algorithmic methods and models for optimization of railways, atmos 2005

5th Workshop on Algorithmic Methods and Models for Optimizat...

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5th workshop on algorithmic methods and models for optimization of railways, atmos 2005

ISBN: (纸本)9783939897002

the proceedings contain 6 papers. the topics discussed include: combinatorial optimization model for railway engine assignment problem;paying less for train connections with MOTIS;analysis of the parameters of transfers in rapid transit network design;computer-based decision support for railway traffic scheduling and dispatching: a review of models and algorithms;line planning with minimal traveling time;and station location - complexity and approximation.

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5th workshop on algorithmic methods and models for optimization of railways, atmos 2005

5th Workshop on Algorithmic Methods and Models for Optimizat...

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5th workshop on algorithmic methods and models for optimization of railways, atmos 2005

ISBN: (纸本)9783939897002

the proceedings contain 6 papers. the topics discussed include: combinatorial optimization model for railway engine assignment problem;station location - complexity and approximation;line planning with minimal traveling time;computer-based decision support for railway traffic scheduling and dispatching: a review of models and algorithms;analysis of the parameters of transfers in rapid transit network design;and paying less for train connections with MOTIS.

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5th workshop on algorithmic methods and models for optimization of railways

OpenAccess Series in Informatics

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OpenAccess Series in Informatics 2006年 2卷

作者： Kroon, Leo G. Möhring, Rolf H. Palma de Mallorca Spain

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Computer-based decision support for railway traffic scheduling and dispatching: A review of models and algorithms

Computer-based decision support for railway traffic scheduli...

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5th workshop on algorithmic methods and models for optimization of railways, atmos 2005

作者： Törnquist, Johanna Department of Software Engineering and Computer Science Blekinge Institute of Technology Soft Center Box 520 372 25 Ronneby Sweden

ISBN: (纸本)9783939897002

this paper provides an overview of the research in railway scheduling and dispatching. A distinction is made between tactical scheduling, operational scheduling and re-scheduling. Tactical scheduling refers to master scheduling, whereas operational scheduling concerns scheduling at a later stage. Re-scheduling focuses on the re-planning of an existing timetable when deviations from it have occurred. 48 approaches published between 1973 and 2005 have been reviewed according to a framework that classifies them with respect to problem type, solution mechanism, and type of evaluation. 26 of the approaches support the representation of a railway network rather than a railway line, but the majority has been experimentally evaluated for traffic on a line. 94 % of the approaches have been subject to some kind of experimental evaluation, while approximately 4 % have been implemented. the solutions proposed vary from myopic, priority-based algorithms, to traditional operations research techniques and the application of agent technology.

关键词： Scheduling

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Combinatorial optimization model for railway engine assignment problem

Combinatorial optimization model for railway engine assignme...

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5th workshop on algorithmic methods and models for optimization of railways, atmos 2005

作者： Illés, Tibor Makai, Márton Vaik, Zsuzsanna Eötvös Loránd University of Sciences Department of Operations Research Pazmany Peter setany 1/C H-1117 Budapest Hungary Szent István University Ybl Miklós Architecture College Department of Mathematics Thököly út 74 H-1146 Budapest Hungary

ISBN: (纸本)9783939897002

this paper presents an experimental study for the Hungarian State Railway Company (MAV). the engine assignment problem was solved at MÁV by their experts without using any explicit operations research tool. Furthermore, the operations research model was not known at the company. the goal of our project was to introduce and solve an operations research model for the engine assignment problem on real data sets. For the engine assignment problem we are using a combinatorial optimization model. At this stage of research the single type train that is pulled by a single type engine is modeled and solved for real data. there are two regions in Hungary where the methodology described in this paper can be used and MÁV started to use it regularly. there is a need to generalize the model for multiple type trains and multiple type engines.

关键词： Engines

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Freight service design for an italian railways company

Freight service design for an italian railways company

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6th workshop on algorithmic methods and models for optimization of railways, atmos 2006

作者： Campetella, Marco Lulli, Guglielmo Pietropaoli, Ugo Ricciardi, Nicoletta Trenitalia SpA Direzione Pianificazione Network e Sistemi Informativi P.zza della Croce Rossa 1 00161 Rome Italy Università di Milano Bicocca Dipartimento di Informatica Sistemistica e Comunicazione Via Bicocca degli Arcimboldi 8 20126 Milan Italy Università di Roma La Sapienza Dipartimento di Statistica Probabilità e Statistiche Applicate P.le Aldo Moro 5 00185 Rome Italy

ISBN: (纸本)9783939897019

In this paper, we present a mathematical model to design the service network, that is the set of origin-destination connections. the resulting model considers both full and empty freight car movements, and takes into account handling costs. More specifically, the model suggests the services to provide, as well as the number of trains and the number and type of cars traveling on each connection. Quality of service, which is measured as total travel time, is established by minimizing the waiting time of cars at intermediate stations. Our approach yields a multi-commodity network design problem with concave arc cost functions. To solve this problem, we implement a tabu search procedure which adopts "perturbing" mechanisms to force the algorithm to explore a larger portion of the feasible region. Computational results on realistic instances show a significant improvement over current practice.

关键词： Tabu search

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