نتایج جستجو برای: urban railway

تعداد نتایج: 184927  

One of the most important challenges in the development of urban railways network is the effects of railway vibrations on human and adjacent structures. Although various investigations into the sources of railway vibrations have been conducted, very few research works have been reported on the influences of track geometry parameters on the level of vibrations. This is addressed in this resea...

Todays, the characteristics of architectural space is important in determining the quality of human life while most attention of architects and urban planners is on areas and sites which have a high level of social activity. Among these sites, railway stations are utmost important in creating appropriate context to communicate and attract a huge number of audiences. Scientific researches show t...

Journal: :JRTPM 2015
Yasufumi Ochiai Norio Tomii

One of the recent problems in urban railways in Japan is that small delays often happen during rush hours. Because trains are running very densely, even a small delay propagates to succeeding trains and the delay tends to expand. In order to precisely evaluate the robustness of a railway system, a detailed simulation so called microscopic simulation in which components of a railway system are m...

2002
Yong-Woo Kim Glenn Ballard

Construction projects become complicated and fragmented so that many specialty contractors are involved. In such changed environments, a general contractor’s overhead costs are increasing comparable to direct costs. In addition to an increase of volume, activities consisting of overhead costs play an important role in coordinating different participants who include different specialty contracto...

Journal: :international journal of civil engineering 0
j. sadeghi iran university of science and technology p. barati iran university of science and technology

current practices in railway track analysis and design are reviewed and discussed in this paper. the mechanical behavior of railway track structure comprising of various components has not been fully understood due to the railway track structural complexity. although there have been some improvements in the accuracy of current track design methods in recent decades, there are still considerable...

2003
A. S. Uppal S. H. Rizkalla

Times of downturn in economy, tough competition, high costs, and large amounts of capital required for replacements have created growing need for cost cutting measures and for seeking better return on investment. This has also placed an increasing emphasis on maintenance practices to extend the service life of existing railroad bridges. This paper outlines the various factors which playa role i...

Chalak, Mohammad Hossein , Khandan, Mohammad , Rostamzadeh, Sajjad , Sarvari, Kourosh , Vosoughi, Shahram ,

Introduction: Safety is a significant part of the public transportation. Suitable safety climate has a positive effect on safety performance and reduces accidents rate. The aim of this study was investigating safety climate status of Tehran subway drivers in 2013. Material and method:  The present study was a descriptive and cross-sectional study. In this study, statistical population was all ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علامه طباطبایی 1390

introruction khawf in(iran)-herat and mazaresharif and shirkhan bandar in (afghanistan)-dushanbe in (tajikistan)_(kirgizstan)-kashghar in(china) project railway network is under construction that it is as a significant corridor for revitalizing silk road corridor in the region .at the present there are three different gauge in the region central asia with 1,520 mm gauge and turkey-islamic repu...

Journal: :CoRR 2016
Kai Zhao

Urban traffic analysis is crucial for traffic forecasting systems, urban planning and, more recently, various mobile and network applications. In this paper, we analyse urban traffic with network and statistical methods. Our analysis is based on one big bus dataset containing 45 million bus arrival samples in Helsinki. We mainly address following questions: 1. How can we identify the areas that...

Journal: :Proceedings of the Japan Society of Civil Engineers 1977

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