نتایج جستجو برای: railroad track

تعداد نتایج: 65899  

Journal: :Vestnik Tverskogo gosudarstvennogo universiteta 2021

Проведена инвентаризация чужеродных и аборигенных видов растений вдоль Транссибирской магистрали на участке Тайшет - Улан-Удэ, длина которого составляет 1126 км (12% Транссиба). Выявлена корреляция между характеристиками биомов основными флористическими показателями. Исследованы 13 железнодорожных станций участки полотна железной дороги, расположенные в трех естественных биомах. На каждом залож...

2014
Ying Sun

As railroad bridge is one of the most important infrastructures of railway, the safety of bridge has a direct effect on railway operation efficiency and safety. In this paper, we propose a distributed railway bridge monitoring platform based on the Internet of Things (IOT) to monitoring the state of bridge safety. We made detailed research on the sensor nodes deployment, sensing data updating a...

Journal: :Applied sciences 2022

Reverse engineering (RE) is a technology used to create three-dimensional (3D) models by scanning structures and can be examine the current condition of structures. Applying RE maintenance railroad facilities with high proportion safety accidents an alternative increase efficiency facilities. However, most tasks while constructing Building Information Modeling (BIM) after 3D extracting two-dime...

2008
Yung-Cheng Lai Christopher P.L. Barkan Hayri Önal

We develop an aerodynamic loading assignment model for intermodal freight trains based on an integer-programming framework to help terminal managers make up more fuel-efficient trains. This is the first use of optimization modeling to address the aerodynamics and energy efficiency of railroad intermodal trains. Several recommendations regarding railway equipment use, operations, and policy are ...

2007
Peter D. Loeb William A. Clarke

This paper examines the determinants of truck accidents in the United States using a time series data set covering the period 1970–2001. Along with other factors, the effect of the Motor Carrier Act of 1980, which deregulated the trucking industry, is examined for its impact on truck accidents. In addition, the model accounts for the effect railroad freight mileage has on truck accidents. Empir...

The main design criteria of ballasted railway tracks include rail deflections, rail bending stresses, rail wheel contact stresses, sleeper bending moments and ballast sleeper contact pressures. Numerous criteria have been defined for the design of ballasted railway tracks owing to the various mechanical properties of track components and their complex interaction. Therefore, railway track desig...

Journal: :Sustainability 2021

In this study, the factors influencing choice of type urban railroad transportation in metropolitan areas Korea were analyzed. As populations are expanding, importance rail transportation, which has a high travel reliability terms time, increased, and various types systems have emerged accordingly. This study was focused on behavior travelers local express trains that use same track differ only...

2014
Ivan Atanassov

The North American freight railroad network is projected to experience rising transportation demand in the coming decades, leading to increased congestion along many rail corridors. Increased interest in expanded passenger service on shared rail corridors will also create additional capacity demand. However, the nation’s rail lines are still predominantly single track with passing sidings, maki...

Journal: :The Economic Journal 1907

Journal: :JAMA: The Journal of the American Medical Association 1899

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