نتایج جستجو برای: railway transportation

تعداد نتایج: 70602  

2005
Luis Ferreira

For the purposes of this paper, e-business is defined as: “the performance, automisation and organisation of transactions, or chains of them, and the gathering and publishing of data, electronically over a communication protocol” Little research has been conducted either into how e-business technology can be successfully evaluated, or into the associated costs and benefits specifically related ...

2011
Maged M. Dessouky Shi Mu Daniel J. Epstein

2 Disclaimer The contents of this report reflect the views of the authors, who are responsible for the facts and the accuracy of the information presented herein. This document is disseminated under the sponsorship of the Transportation assume no liability for the contents or use thereof. The contents do not necessarily reflect the official views or policies of the State of California or the De...

Journal: :Interfaces 2005
Erwin J. W. Abbink Matteo Fischetti Leo G. Kroon Gerrit Timmer Michiel J. C. M. Vromans

In this paper we describe the successful application of a sophisticated Operations Research model and the corresponding solution techniques for scheduling the 6,500+ drivers and conductors of the Dutch railway operator NS Reizigers (Netherlands Railways). In 2001 the drivers and conductors were very dissatisfied with the structure of their duties, which led to nation wide strikes. However, the ...

2013
Mustafa Seçkin DURMUŞ Mehmet Turan SÖYLEMEZ

Özet When compared with the other transportation systems, railway systems are economical, safer and more environment friendly. Despite all these features, investments on railways in Turkey remained quite restricted in comparison to other European countries. The initial construction costs of railways are high and developing its signaling system also requires a lot of attention. Signaling system ...

2007
Keiki Takadama Takahiro Majima Daisuke Watanabe Mitsujiro Katsuhara

This paper explores quantitative evaluation criteria for service and potentials of new service from the transportation viewpoint. For this purpose, we analyze transport networks of railway, subway, and waterbus, and have revealed the following implications: (1) efficiency criterion proposed by Latora [7, 8] and centrality criterion in the complex network literature can be applied as quantitativ...

Journal: :Math. Program. 2002
Alexander Schrijver

We review two papers that are of historical interest for combinatorial optimization: an article of A.N. Tolstŏı from 1930, in which the transportation problem is studied, and a negative cycle criterion is developed and applied to solve a (for that time) large-scale (10×68) transportation problem to optimality; and an, until recently secret, RAND report of T. E. Harris and F. S. Ross from 1955, ...

2015
Yongze Yan

1 Chinese railway system serves as an important role for the economy of China and the travel needs 2 of its citizens. As China is subject to frequent earthquake events, it is important to investigate 3 how to strengthen the railway system to retain its service after earthquakes. This paper proposes a 4 comprehensive methodology to suggest the optimal investment plan using historical earthquake ...

2010
K. K. Wong

Railway service is now the major transportation means in most of the countries around the world. With the increasing population and expanding commercial and industrial activities, a high quality of railway service is the most desirable. Dwell time control at stations and fixed coasting point in an inter-station run are the current practices to maintain the train service in most metro railway sy...

2002
Gunyoung KIM Kyungwoo KANG Gunyoung Kim

Railroad-related accidents are more dangerous than other transportation accidents in terms of severity and death rate etc. Therefore more efforts are necessary for improving safety. In the mean time, Korean national railroad has researched and invested continuously such as intelligent safety equipments and level crossing between railroad and highway for decreasing railroad-related accident and ...

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