Optimization Based Methods For Revising Train Timetables With Focus On Robustness
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Optimization Based Methods For Revising Train Timetables With Focus On Robustness
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Author : Fahimeh Khoshniyat
language : en
Publisher: Linköping University Electronic Press
Release Date : 2016-12-01
Optimization Based Methods For Revising Train Timetables With Focus On Robustness written by Fahimeh Khoshniyat and has been published by Linköping University Electronic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-12-01 with categories.
With increase in the use of railway transport, ensuring robustness in railway timetables has never been this important. In a dense railway timetable even a small disturbance can propagate easily and affect trains' arrival and departure times. In a robust timetable small delays are absorbed and knock-on effects are prevented effectively. The aim of this thesis is to study how optimization tools can support the generation of robust railway traffic timetables. We address two Train Timetabling Problems (TTP) and for both problems we apply Mixed Integer Linear Programming (MILP) to solve them from network management perspectives. The first problem is how robustness in a given timetable can be assessed and ensured. To tackle this problem, a headway-based method is introduced. The proposed method is implemented in real timetables and evaluated from performance perspectives. Furthermore, the impact of the proposed method on capacity utilization, heterogeneity and the speed of trains, is monitored. Results show that the proposed method can improve robustness without imposing major changes in timetables. The second problem addressed in the thesis is how robustness can be assessed and maintained in a given timetable when allocating additional traffic and maintenance slots. Different insertion strategies are studied and their consequences on capacity utilization and on the properties of the timetables are analyzed. Two different insertion strategies are considered: i) simultaneous and ii) stepwise insertion. The results show that inserting the additional trains simultaneously usually results in generating more optimal solutions. However, solving this type of problem is computationally challenging. We also observed that the existing robustness metrics cannot capture the essential properties of having more robust timetables. Therefore we proposed measuring Channel Width, Channel Width Forward, Channel Width Behind and Track Switching. Furthermore, the experimental analysis of the applied MILP model shows that some cases are computationally hard to solve and there is a need to decrease the computation time. Hence several valid inequalities are developed and their effects on the computation time are analyzed. This thesis contains three papers which are appended. The results of this thesis are of special interests for railway traffic planners and it would support their working process. However, railway traffic operators and passengers also benefit from this study.
Optimization In Public Transportation
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Author : Anita Schöbel
language : en
Publisher: Springer Science & Business Media
Release Date : 2007-01-27
Optimization In Public Transportation written by Anita Schöbel and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-01-27 with Mathematics categories.
This book develops models, results and algorithms for optimizing public transportation from a customer-oriented viewpoint. The methods used are based on graph-theoretic approaches and integer programming. The specific topics are all motivated by real-world examples which occurred in practical projects: location of stops, management of delay, and tariff zone design. An appendix summarizes some of the basics of optimization needed to interpret the material in the book.
Dynamics And Randomness
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Author : Alejandro Maass
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Dynamics And Randomness written by Alejandro Maass and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Mathematics categories.
This book contains the lectures given at the Conference on Dynamics and Randomness held at the Centro de Modelamiento Matematico of the Universidad de Chile from December 11th to 15th, 2000. This meeting brought together mathematicians, theoretical physicists and theoretical computer scientists, and graduate students interested in fields re lated to probability theory, ergodic theory, symbolic and topological dynam ics. We would like to express our gratitude to all the participants of the con ference and to the people who contributed to its organization. In particular, to Pierre Collet, Bernard Host and Mike Keane for their scientific advise. VVe want to thank especially the authors of each chapter for their well prepared manuscripts and the stimulating conferences they gave at Santiago. We are also indebted to our sponsors and supporting institutions, whose interest and help was essential to organize this meeting: ECOS-CONICYT, FONDAP Program in Applied Mathematics, French Cooperation, Fundacion Andes, Presidential Fellowship and Universidad de Chile. We are grateful to Ms. Gladys Cavallone for their excellent work during the preparation of the meeting as well as for the considerable task of unifying the typography of the different chapters of this book.
Operations Research Models For Scheduling Railway Infrastructure Maintenance
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Author : Gabriella Budai-Balke
language : en
Publisher: Rozenberg Publishers
Release Date : 2009
Operations Research Models For Scheduling Railway Infrastructure Maintenance written by Gabriella Budai-Balke and has been published by Rozenberg Publishers this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
This thesis can be divided into two parts. In Part I we are dealing with the problem of finding optimal time intervals for carrying out routine maintenance works and large projects in such a way that the track possession costs and maintenance costs are minimized. In Part II of this thesis we focus on rescheduling of the rolling stock in the passenger railways due to changing circumstances and more precisely on the Rolling Stock Rebalancing Problem (RSRP). The main objectives of this thesis are formulated as follows: 1. Review the existing literature on maintenance planning in relation with production. 2. Identify some tactical and operational railway infrastructure maintenance planning problems and develop operations research models for providing decision support. Investigate the effect of planning railway infrastructure maintenance on the train operation and identify rolling stock planning problems that occur during planned infrastructure maintenance. 3. Analyze the considered models, investigate their computational complexity, propose solution methods and test the solutions of the models.
Designing Robust Road Networks
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Author : Maaike Snelder
language : en
Publisher:
Release Date : 2010
Designing Robust Road Networks written by Maaike Snelder and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Highway planning categories.
Handbook On High Speed Rail And Quality Of Life
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Author : Yoshitsugu Hayashi
language : en
Publisher: Asian Development Bank
Release Date : 2020-12-29
Handbook On High Speed Rail And Quality Of Life written by Yoshitsugu Hayashi and has been published by Asian Development Bank this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-12-29 with categories.
Handbook on High-Speed Rail and Quality of Life outlines global experiences of high-speed rail development, including its construction, impacts, and planning, with a special focus on countries that are planning implementation in the coming decade. High-speed rail infrastructure can bring considerable socioeconomic benefits that cannot be captured through econometric modeling alone. Thus, analysis of the true impacts requires a scalar as well as a temporal lens. The studies in this handbook discuss transport infrastructure projects of varying geographic scale and describe the underlying complexities of developing an infrastructure system while focusing on the aspects that can enhance quality of life. The cases, concepts, and ideas presented in this handbook were discussed and refined during a conference and seminar series held at the Asian Development Bank Institute in Tokyo and special sessions on transport and quality of life at the 15th World Conference on Transport Research at the Indian Institute of Technology Bombay in Mumbai. The special sessions were jointly organized by the Asian Development Bank Institute and World Conference on Transport Research Society Special Interest Group A4, "High-Speed Rail: Policy, Investment, and Impacts". The conference and special sessions highlighted critical issues and delivered key messages on the broad research on high-speed rail and quality of life.
Improving Healthcare Quality In Europe Characteristics Effectiveness And Implementation Of Different Strategies
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Author : OECD
language : en
Publisher: OECD Publishing
Release Date : 2019-10-17
Improving Healthcare Quality In Europe Characteristics Effectiveness And Implementation Of Different Strategies written by OECD and has been published by OECD Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-10-17 with categories.
This volume, developed by the Observatory together with OECD, provides an overall conceptual framework for understanding and applying strategies aimed at improving quality of care. Crucially, it summarizes available evidence on different quality strategies and provides recommendations for their implementation. This book is intended to help policy-makers to understand concepts of quality and to support them to evaluate single strategies and combinations of strategies.
National Timetable
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Author : Amtrak
language : en
Publisher:
Release Date : 1999
National Timetable written by Amtrak and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Railroads categories.
Railway Timetabling Operations
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Author : Ingo A. Hansen
language : en
Publisher:
Release Date : 2014-09-12
Railway Timetabling Operations written by Ingo A. Hansen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-09-12 with categories.
Ai And Education
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Author : Miao, Fengchun
language : en
Publisher: UNESCO Publishing
Release Date : 2021-04-08
Ai And Education written by Miao, Fengchun and has been published by UNESCO Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-04-08 with Political Science categories.
Artificial Intelligence (AI) has the potential to address some of the biggest challenges in education today, innovate teaching and learning practices, and ultimately accelerate the progress towards SDG 4. However, these rapid technological developments inevitably bring multiple risks and challenges, which have so far outpaced policy debates and regulatory frameworks. This publication offers guidance for policy-makers on how best to leverage the opportunities and address the risks, presented by the growing connection between AI and education. It starts with the essentials of AI: definitions, techniques and technologies. It continues with a detailed analysis of the emerging trends and implications of AI for teaching and learning, including how we can ensure the ethical, inclusive and equitable use of AI in education, how education can prepare humans to live and work with AI, and how AI can be applied to enhance education. It finally introduces the challenges of harnessing AI to achieve SDG 4 and offers concrete actionable recommendations for policy-makers to plan policies and programmes for local contexts. [Publisher summary, ed]