نتایج جستجو برای: electrical railway

تعداد نتایج: 208489  

Journal: :Acta medico-historica adriatica : AMHA 2014
Sinisa Lajnert

This paper describes the system of medical hygiene and health care adopted by the Croatian section of Yugoslav Railways in the aftermath of World War Two until 1953, based on archival information. In 1945, the human resources section of the Railway Administration in Zagreb included the Department of Social Welfare with offices that managed health insurance in cases of illness and accidents, wor...

Journal: :Computers & OR 2013
Richard Lusby Jesper Larsen Matthias Ehrgott David M. Ryan

Efficiently coordinating the often large number of interdependent, timetabled train movements on a railway junction, while satisfying a number of operational requirements, is one of the most important problems faced by a railway company. The most critical variant of the problem arises on a daily basis at major railway junctions where disruptions to rail traffic make the planned schedule/routing...

2016
Jinjin Ge Ying Xu Weiwei Cheng

The shield tunnel of the Kunming subway crosses beneath the Kun-Shi Railway. Due to the high requirements of railway track for settlement control, this article proposes the following technical measures for controlling the settlement based on the analysis of risks arising from the shield crossing railway: (1) Reinforcing the stratum of the region crossed by the shield in advance to achieve high ...

2016
CHILKURI SRAVAN KUMAR Chilkuri Sravan Kumar

Global Navigation Satellite Systems (GNSS) are applicable to deliver train locations in real time. This train localization function should comply with railway functional safety standards; thus, the GNSS performance needs to be evaluated in consistent with railway EN 50126 standard [Reliability, Availability, Maintainability, and Safety (RAMS)]. This paper demonstrates the performance of the GNS...

2013
Zuraida Alwadood Adibah Shuib

This paper presents the review of past studies concerning mathematical models for rescheduling passenger railway services, as part of delay management in the occurrence of railway disruption. Many past mathematical models highlighted were aimed at minimizing the service delays experienced by passengers during service disruptions. Integer programming (IP) and mixed-integer programming (MIP) mode...

2015
Dechen Yao Limin Jia Yong Qin Jianwei Yang

Early identification of faults in railway gearboxes is a challenging task in gearbox fault detection. There are extensive studies, such as patents and papers have been fully developed for processing vibration signals to obtain diagnostic information about gearbox. We have proposed a new technique for detecting faults in the railway gearbox by applying the time frequency parameters and genetic a...

Journal: :Energies 2023

Electrical resistance is among the characteristics that fastening systems must meet to ensure proper functioning of signaling in railway infrastructure. The EN 13146-5:2012 standard specifies a laboratory testing method for determining electrical under wet conditions between running rails provided by system on steel or concrete sleepers. In urban tracks, affects stray current; however, there no...

2015
Małgorzata Wierzbicka Olga Bemowska-Kałabun Barbara Gworek

Railway transport is a source of pollution to soils and living organisms by e.g. PAHs, PCBs, oil-derived products, pesticides and heavy metals. Soil toxicity evaluation requires chemical analyses, indicating the type and content of particular pollutants, as well as biological analyses, which allow assessing the reaction of organisms to these pollutants. This paper is focused on a multi-aspect e...

Journal: :Journal of epidemiology and community health 2011
C K Law P S F Yip

BACKGROUND Setting physical barriers, for example platform screen doors (PSDs), has been proven to be effective in preventing falls onto railway tracks, but its cost-effectiveness is not known. For economic evaluation of public health interventions, the importance of including non-health factors has been noted despite a lack of empirical studies. This study aimed to investigate the effectivenes...

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