Development of Superconducting cable for Railway System

2013 ◽  
Vol 48 (11) ◽  
pp. 562-568 ◽  
Author(s):  
Masaru TOMITA
Keyword(s):  
Railway System

Comparison on General Track Spectrum for Chinese Main Railway Lines and Track Spectrum of American Railway Lines

2011 ◽  
Vol 250-253 ◽  
pp. 3822-3826 ◽  
Author(s):  
Xian Mai Chen ◽  
Xia Xin Tao ◽  
Gao Hang Cui ◽  
Fu Tong Wang
Keyword(s):  
Dynamic Performance ◽  
Dynamic Responses ◽  
Wave Band ◽  
Wheel Load ◽  
Railway Line ◽  
Acceleration Rate ◽  
Time Histories ◽  
Railway System ◽  
Dynamic Performances ◽  
Track Irregularity

The general track spectrum of Chinese main railway lines (ChinaRLS) and the track spectrum of American railway lines (AmericaRLS) are compared in terms of character of frequency domain, statistical property of time domain samples and dynamic performance. That the wavelength range of the ChinaRLS, which is characterized by the three levels according to the class of railway line, is less than AmericaRLS at common wave band of 1~50m is calculated. Simultaneously, the mean square values of two kinds of track spectra are provided at the detrimental wave bands of 5~10m, 10~20m, and so on. The time-histories of ChinaRLS and AmericaRLS are simulated according to the trigonometric method, and the digital statistical nature of simulated time samples is analyzed. With inputting the two kinds of time-histories into the vehicle-railway system, the comparative analysis of the two kinds of dynamic performances for ChinaRLS and AmericaRLS is done in terms of car body acceleration, rate of wheel load reduction, wheel/rail force, and the dynamic responses of track structure. The result shows that ChinaRLS can characterize the feature of the Chinese track irregularity better than AmericaRLS, the track irregularity with the ChinaRLS of 200km/h is superior to the AmericaRLS, and the track irregularity with the ChinaRLS of 160km/h corresponds to with the sixth of AmericaRLS.

Managing Risks in the Railway System

2021 ◽  
Author(s):  
Konstantinos Tzanakakis
Keyword(s):  
Railway System

scholarly journals Evaluation of Safety Degree at Railway Crossings in Order to Achieve Sustainable Traffic Management: A Novel Integrated Fuzzy MCDM Model

2021 ◽  
Vol 13 (2) ◽  
pp. 832
Author(s):  
Aleksandar Blagojević ◽  
Sandra Kasalica ◽  
Željko Stević ◽  
Goran Tričković ◽  
Vesna Pavelkić
Keyword(s):  
Traffic Control ◽  
Traffic Management ◽  
Assessment Model ◽  
Level Crossings ◽  
Fuzzy Matrix ◽  
Sustainable Performance ◽  
Current State ◽  
Criterion Weight ◽  
Railway System ◽  
Criteria Importance

Sustainable traffic system management under conditions of uncertainty and inappropriate road infrastructure is a responsible and complex task. In Bosnia and Herzegovina (BiH), there is a large number of level crossings which represent potentially risky places in traffic. The current state of level crossings in BiH is a problem of the greatest interest for the railway and a generator of accidents. Accordingly, it is necessary to identify the places that are currently a priority for the adoption of measures and traffic control in order to achieve sustainability of the whole system. In this paper, the Šamac–Doboj railway section and passive level crossings have been considered. Fifteen different criteria were formed and divided into three main groups: safety criteria, road exploitation characteristics, and railway exploitation characteristics. A novel integrated fuzzy FUCOM (full consistency method)—fuzzy PIPRECIA (pivot pairwise relative criteria importance assessment) model was formed to determine the significance of the criteria. When calculating the weight values of the main criteria, the fuzzy Heronian mean operator was used for their averaging. The evaluation of level crossings was performed using fuzzy MARCOS (measurement of alternatives and ranking according to compromise solution). An original integrated fuzzy FUCOM–Fuzzy PIPRECIA–Fuzzy MARCOS model was created as the main contribution of the paper. The results showed that level crossings 42 + 690 (LC4) and LC8 (82 + 291) are the safest considering all 15 criteria. The verification of the results was performed through four phases of sensitivity analysis: resizing of an initial fuzzy matrix, comparative analysis with other fuzzy approaches, simulations of criterion weight values, and calculation of Spearman’s correlation coefficient (SCC). Finally, measures for the sustainable performance of the railway system were proposed.

Mexico's Pre-Revolutionary Reckoning with Railroads

1985 ◽  
Vol 42 (1) ◽  
pp. 1-28 ◽  
Author(s):  
Robert W. Randall
Keyword(s):  
Economic Growth ◽  
Economic Theory ◽  
Transportation Network ◽  
Underdeveloped Country ◽  
Role Of The State ◽  
Economic Interpretation ◽  
Short Run ◽  
Railway System ◽  
Economic Considerations

Economic considerations all but dominate recent historical writing in this country about the railroads of Mexico. Technical matters of construction and operation, as well as the role of the state in both, are touched upon, but economic interpretation, whether of the development of a railway system or of its impact on the nation, is the watchword if not catchword of most writing. Probably the leading example of the dominant approach is Growth against Development: The Economic Impact of Railroads in Porfirian Mexico (Northern Illinois University Press, 1981), by John H. Coatsworth, in which the author concludes that, while “the short run contribution of railroads to economic growth was large,” their longrun impact helped “to create the underdeveloped country Mexico has become.” Applying economic theory and measuring, Coatsworth in essence proves with numbers a case argued more elegantly in straight prose early in this century: that the application of a modern transportation network to a staple producing economy will do little more than extend and intensify the production system so as to increase the staple output.

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