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.
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.
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:
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.
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.
Download or read book Neues Verkehrswissenschaftliches Journal Ausgabe 19 written by Di Liu and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Neues verkehrswissenschaftliches Journal Ausgabe 24 written by Nan Cao and published by BoD – Books on Demand. This book was released on 2018-01-23 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: An efficient utilization of existing infrastructure can be achieved with a more efficient operation. However, the occupancy of infrastructure has not been discussed in the existing definitions and evaluation methods of homogeneity. An extension of existing definitions is presented from the perspective of the infrastructure, which can be characterized by variations in blocking time, buffer time and running direction. The blocking time, buffer time and running direction describe the occupancy of train path on track sections based on the blocking time model. Accordingly, the homogeneity of operating programs is evaluated through three parameters, namely the homogeneity of blocking time (HBL), the homogeneity of buffer time (HBU) and the homogeneity of running direction (HRD). The overall homogeneity (OH) combined these three parameters to realize an integrity evaluation of homogeneity of operating programs. This new methodology can quantify the homogeneity of railway operations, not only for track sections but for an entire network, which contributes significantly to the efficient utilization of infrastructure. In addition, the interrelationship between homogeneity of operating programs and operation quality were investigated quantitatively for both each parameter of homogeneity and the overall homogeneity. The operation quality deteriorates with less homogeneous timetables, in which the variation in buffer time has a more significant influence. Finally, the influence of homogeneity of operating programs in capacity research is studied for different scenarios. The low traffic flow is more sensitive to the homogeneity of buffer time and the homogeneity of blocking time is more significant for high traffic flow.
Download or read book Highway Capacity and Level of Service written by National Research Council (U.S.). Transportation Research Board and published by . This book was released on 1979 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Embedded Systems written by Rao B. Kanta and published by PHI Learning Pvt. Ltd.. This book was released on 2011 with total page 561 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Modeling Elevator System with Coloured Petri Nets written by Mohammed Assiri and published by Createspace Independent Publishing Platform. This book was released on 2015-06-09 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: A fairly general model of the elevator system is presented. Coloured Petri Nets (CPN) and CPN tools are adopted as modeling tools. The model, which is independent of the number of floors and elevators, covers different stages of the elevator system in substantial detail. The model assists simulation-based analysis of different algorithms and rules which govern real elevator systems. The results prove the compatibility and applicability of this model in various situations and demonstrate the expressive power and convenience of CPN.
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.
Download or read book Traffic and Highway Engineering Enhanced Edition written by Nicholas J. Garber and published by Cengage Learning. This book was released on 2018-12-17 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gain unique insights into all facets of today's traffic and highway engineering with the enhanced edition of Garber and Hoel's best-selling TRAFFIC AND HIGHWAY ENGINEERING, 5th Edition. This edition initially highlights the pivotal role that transportation plays in today's society. Readers examine employment opportunities that transportation creates, its historical impact and the influences of transportation on modern daily life. This comprehensive approach offers an accurate understanding of the field with emphasis on some of transportation's distinctive challenges. Later chapters focus on specific issues facing today's transportation engineers to prepare readers to overcome common obstacles in the field. Worked problems, diagrams and tables, reference materials and meaningful examples clearly demonstrate how to apply and build upon the transportation engineering principles presented. Important Notice: Media content referenced within the product description or the product text may not be available in the ebook version.
Download or read book Dictionary Catalog of the Art and Architecture Division written by New York Public Library. Art and Architecture Division and published by . This book was released on 1975 with total page 730 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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:
Download or read book Signalized Intersections written by Daiheng Ni and published by Springer Nature. This book was released on 2020-02-27 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook introduces the basics principles of intersection signalization including need studies, signal phasing, sequencing, timing, as well as more advanced topics such as detectors, controllers, actuated control schemes, and signal coordination. The book covers a variety of topics critical to the set up and operation of intersections controlled by traffic signals. Professor Ni imparts a basic understanding of how intersections work, what justifies intersection signalization, how to properly design phasing and timing plans for intersections, what is needed to run traffic-responsive signals, the workings of traffic controller cabinets, and how to set up signal coordination at multiple intersections—competencies essential to transportation professionals in charge of traffic operation at federal, state, and local levels. Aimed at students in transportation engineering programs with a focus on intersection signalization, the book is also ideal for researchers of traffic dynamics and municipal civil and transportation engineers.
Download or read book Travel Demand Forecasting written by and published by Transportation Research Board. This book was released on 1991-01-01 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt:
