نتایج جستجو برای: railroad transportation

تعداد نتایج: 59401  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علم و صنعت ایران - دانشکده مهندسی عمران 1390

چکیده ندارد.

2010
K. Fujimura Y. Yoshimitsu T. Naito S. Kamijo

Protection of critical transportation infrastructure such as railroad station is an important topic in these days. In this paper, we develop a new rule based approach to video surveillance system for detecting situations where pedestrians may be in peril, as well as suspicious action or interactions at railroad station. We analyze here two general types of pedestrian involved behaviors: (i) sin...

2012
Xiang Liu Christopher P. L. Barkan Rapik Saat

Transportation Research Record: Journal of the Transportation Research Board, No. 2261, Transportation Research Board of the National Academies, Washington, D.C., 2011, pp. 178–185. DOI: 10.3141/2261-21 structure and operational conditions. Track-related and equipmentrelated accident causes collectively result in the majority of train derailments in the United States. Understanding how they may...

2010
Jonathan E. Hughes Meghan Busse Stephen Holland Christopher Knittel Douglas Miller David Rapson Victor Stango

This paper provides evidence of market power in the transportation of ethanol used in reformulated gasoline and alternative transportation fuels. I estimate a reduced form model for railroad route-level prices. My identification strategy instruments for railroad entry, controls for selection and explicitly models capacity constraints. A detailed understanding of this industry is important becau...

2011
Dave Donaldson Richard Hornbeck Jan Kozak

This paper examines the impact of railroads on American economic growth. Drawing on general equilibrium trade theory, changes in counties’ “market access” captures the aggregate impact of local changes in railroads. Using a new spatial network of freight transportation routes, we calculate county-to-county lowest transportation costs and counties’ implied market access. As railroads expanded fr...

2001
Christopher P.L. Barkan Preston Sargent

The Association of American Railroads (AAR) has recently completed development of the first industry standard for a reliable, spill-proof locomotive refueling system. The Locomotive Fueling Interface Standard (LFIS) is an open, non-proprietary standard that incorporates a combination of the latest, proven refueling equipment technologies adapted for use in the railroad environment. The LFIS was...

2006
Jodelson A. Sabino Thomas Stützle Mauro Birattari José Eugênio Leal

This reasearch studies ACO algorithms for the switch engine scheduling in a Railroad Yard. The cars are moved individually or grouped into blocks by a set of locomotives called switch engines which are dedicated to moving around the cars in the yard. The need for moving comes from the fact that the arriving trains are disassembled into blocks of cars, undergo some operations like, loading , unl...

Journal: :Computers & OR 2007
Manish Verma Vedat Verter

Hazardous materials are potentially harmful to people and environment due to their toxic ingredients. Although a significant portion of dangerous goods transportation is via railroads, prevailing studies on dangerous goods transport focus on highway shipments. We present an analytical framework that incorporates the differentiating features of trains, notably volume and nature of cargo, in the ...

1999
David A. Bessler Stephen W. Fuller

Time series methods are used to study the dynamics of regional, export-wheat, railroad rates linking seven central US regions to Texas Gulf ports. Research focuses on the extent and nature of regional rate interactions to determine whether regional rail transportation rates are established independently, through interaction and/or dominated by several regional leaders. Analysis is carried out o...

2015
David A. Bessler Stephen W. Fuller

Time series methods are used to study the dynamics of regional, export-wheat, railroad rates linking seven central US regions to Texas Gulf ports. Research focuses on the extent and nature of regional rate interactions to determine whether regional rail transportation rates are established independently, through interaction and/or dominated by several regional leaders. Analysis is carried out o...

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