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Book Synopsis Neues verkehrswissenschaftliches Journal - Ausgabe 18 by : Jiajian Liang
Download or read book Neues verkehrswissenschaftliches Journal - Ausgabe 18 written by Jiajian Liang and published by BoD – Books on Demand. This book was released on 2017-08-18 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: A railway system is a complex system. With the assistance of a railway operation control system, railway traffic is managed according to an operation plan. During the operation process, especially in railway networks with complex topology and high traffic flow, disturbances are likely to occur, which may result in severe deviations of train movements from the pre-designed operation plan. Once conflicts have occurred or potential conflicts between trains have been detected, suitable dispatching actions should be executed to minimize the negative impacts of the disturbances. In order to support dispatchers, a dispatching optimization algorithm was developed in this dissertation. In the development of dispatching models, two aspects need be considered: modelling of railway operation and the dispatching optimization algorithm. The former is indispensable to accurately assess the impact of disturbances, and the latter is employed to find solutions with minimal impact. In order to balance accuracy and computation complexity a multi-scale simulation model was developed in this dissertation. Dispatching optimization is a typical combinatorial optimization problem, and exhaustive search becomes impractical when there is a large set of possible dispatching solutions. To speed up the search, a widely used metaheuristic algorithm-tabu search - was adopted as the basis of the dispatching optimization algorithm. This dissertation addressed both multi-scale simulation and dispatching optimization in railway operation.
Book Synopsis Neues verkehrswissenschaftliches Journal NVJ - Ausgabe 4 by : Yong Cui
Download or read book Neues verkehrswissenschaftliches Journal NVJ - Ausgabe 4 written by Yong Cui and published by BoD – Books on Demand. This book was released on 2010 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Neues verkehrswissenschaftliches Journal - Ausgabe 22 by : Weiting Zhao
Download or read book Neues verkehrswissenschaftliches Journal - Ausgabe 22 written by Weiting Zhao and published by BoD – Books on Demand. This book was released on 2018-01-23 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the increasing traffic demand and limited infrastructure expansion, railway operation becomes more susceptible to the operational disturbances. In order to ensure a robust railway operation, a proactive dispatching algorithm in dynamic circumstances under the consideration of random disturbances is necessary. In this study, an operational risk map will be firstly produced: by simulating considerable amount of disturbed scenarios generated in a Monte-Carlo scheme and calculating the corresponding expected negative impacts, different levels of operational risk will be assigned to each block section in the investigated network. Within a rolling time horizon framework, conflicts are detected with the inclusion of risk-oriented disturbances in each block section, and the near-optimal dispatching solutions are calculated by using Tabu search algorithm. Finally, three indicators including total weighted waiting time, the number of relative reordering and average absolute retiming, are chosen to testify the effectiveness and advantages of the proposed dispatching algorithm. The sensitivity analysis of dispatching-related parameters is conducted afterwards to investigate the most appropriate relevant parameters for the specific studied area. The proposed algorithms are expected to be capable of automatically producing near-optimal and robust dispatching solutions with sufficient punctuality achieved.
Book Synopsis Neues verkehrswissenschaftliches Journal - Ausgabe 26 by : Yong Cui
Download or read book Neues verkehrswissenschaftliches Journal - Ausgabe 26 written by Yong Cui and published by BoD – Books on Demand. This book was released on 2018-10-25 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: Simulation methods are widely-used in the field of railway planning and operations. However, the various tools are all lacking with respect to the standards they utilise as well as their published interfaces. For an end-user, the basic mechanism and the assumptions built into a simulation tool are unknown, which means that the true potential of these software tools is limited. One of the most critical issues is the lack of the ability of users to define a sophisticated workflow, integrated in several rounds of simulation with adjustable parameters and settings. This book develops and describes a user-based, customisable platform. As the preconditions of the platform, the design aspects for modelling the components of a railway system and building the workflow of railway simulation are elaborated in detail. Based on the model and the workflow, an integrated simulation platform with open interfaces is developed. Users and researchers gain the ability to rapidly develop their own algorithms, supported by the tailored simulation process in a flexible manner. The productivity of using simulation tools for further evaluation and optimisation will be significantly improved through the user-adaptable open interfaces.
Book Synopsis Neues verkehrswissenschaftliches Journal - Ausgabe 19 by : Di Liu
Download or read book Neues verkehrswissenschaftliches Journal - Ausgabe 19 written by Di Liu and published by BoD – Books on Demand. This book was released on 2017-07-11 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rail-bound transport in urban areas plays an important role in public transport. Given its urban setting, urban rail-bound transport can be significantly influenced by the interfering road traffic around it. Considering the capacity and operation quality of urban rail-bound transport influenced by road traffic in various urban mixed traffic zones, it'very important to investigate and include the road traffic influences for capacity research on urban rail-bound transport. In this dissertation, two approaches are developed to model the road traffic influences according to the analysis of the interactions between urban mixed traffic in various mixed traffic zones. As an important intermediate result, the newly-developed waiting time function is determined to adapt to an urban rail-bound system with consideration of external influences. Furthermore, an algorithm is developed in the model with an event-driven system to simulate the interactions among urban mixed traffic in various mixed traffic zones. This algorithm is used to assess the significance of mixed traffic impacts and derive the primary results for capacity research.
Book Synopsis Demography and Infrastructure by : Tobias Kronenberg
Download or read book Demography and Infrastructure written by Tobias Kronenberg and published by Springer Science & Business Media. This book was released on 2011-02-09 with total page 259 pages. Available in PDF, EPUB and Kindle. Book excerpt: Population ageing has been going on for many decades, but population shrinking is a rather new phenomenon. The population of Germany, as in many other countries, has passed a plateau and is currently shrinking. Demographic change is a challenge for infrastructure planning due to the longevity of infrastructure capital and the need to match supply and demand in order to ensure cost-efficiency. This book summarises the findings of the INFRADEM project team, a multidisciplinary research group that worked together to estimate the effects of demographic change on infrastructure demand. Economists, engineers and geographers present studies from top-down and bottom-up perspectives, focusing on Germany and two selected regions: Hamburg and Mecklenburg-Western Pomerania. The contributors employed a broad range of methods, including an overlapping-generations model for Germany, regional input-output models, an energy systems model, and a spatial model of the transportation infrastructure.
Book Synopsis The National Union Catalog, Pre-1956 Imprints by :
Download or read book The National Union Catalog, Pre-1956 Imprints written by and published by . This book was released on 1968 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dictionary Catalog of the Research Libraries of the New York Public Library, 1911-1971 by : New York Public Library. Research Libraries
Download or read book Dictionary Catalog of the Research Libraries of the New York Public Library, 1911-1971 written by New York Public Library. Research Libraries and published by . This book was released on 1979 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book New Serial Titles written by and published by . This book was released on 1974 with total page 1614 pages. Available in PDF, EPUB and Kindle. Book excerpt: A union list of serials commencing publication after Dec. 31, 1949.
Book Synopsis Railway Timetabling & Operations by : Ingo A. Hansen
Download or read book Railway Timetabling & Operations written by Ingo A. Hansen and published by . This book was released on 2014-09-12 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Union List of Serials in Libraries of the United States and Canada by : Winifred Gregory
Download or read book Union List of Serials in Libraries of the United States and Canada written by Winifred Gregory and published by . This book was released on 1939 with total page 758 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Urban Sprawl by : Gregory D. Squires
Download or read book Urban Sprawl written by Gregory D. Squires and published by The Urban Insitute. This book was released on 2002 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Urban Sprawl is not simply a development that undercuts the quality of life for suburbanites. It has raised alarms across the nation, as fair housing advocates, environmentalists, land use planners, and even many suburban employers who cannot find the workers they need, have recognized that the costs go far beyond aesthetics. Despite the agreement that something needs to be done, there is no consensus on what works. Urban Sprawl: Causes, Consequences, and Policy Responses assembles leading scholars who analyze the major causes and consequences of urban sprawl and the policy initiatives that are being explored in response to these developments.
Book Synopsis Union List of Serials in Libraries of the United States and Canada by : Edna Brown Titus
Download or read book Union List of Serials in Libraries of the United States and Canada written by Edna Brown Titus and published by New York : H.W. Wilson. This book was released on 1965 with total page 922 pages. Available in PDF, EPUB and Kindle. Book excerpt: This edition, representing 956 libraries and 156,449 titles, incorporates the 2nd ed. (1943) and its two supplements together with new titles and additional locations.
Download or read book National Union Catalog written by and published by . This book was released on 1968 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The National Union Catalogs, 1963- by :
Download or read book The National Union Catalogs, 1963- written by and published by . This book was released on 1964 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Union List of Serials in Libraries of the United States and Canada by :
Download or read book Union List of Serials in Libraries of the United States and Canada written by and published by . This book was released on 1931 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Railway Track Engineering by : J. S. Mundrey
Download or read book Railway Track Engineering written by J. S. Mundrey and published by Tata McGraw-Hill Education. This book was released on 2009-10-29 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Railway Track Engineering presents conventional methods of track construction, maintenance and monitoring, along with modern sophisticated track machines. It also comprehensively covers design details and specifications of important track componentsChanges in the revised edition include:Explanation of the hitherto little understood phenomenon of rolling contact fatigue in rails and practical steps to deal with it. New technology of alumino-thermic rail welding. New guidelines for ultrasonic rail flaw detection. Ballastless track for metros, mainlines and washable aprons. Track standards for ultra high-speed lines in India. Track structure for Dedicated Freight Corridors. Technology of fully mechanized track construction with the deployment of simple track laying equipment to highly sophisticated track-laying trains.Richly illustrated with photographs and line drawings, this book will be useful to professionals and students.
