نتایج جستجو برای: railway geometry

تعداد نتایج: 158787  

Journal: :Structural Health Monitoring-an International Journal 2022

Track quality affects passenger comfort and safety. To maintain the of track, track geometry component defects are inspected routinely. is using a car (TGC). Measured values stored in machine processed to evaluate quality. However, require more effort inspect. can be manually which time- workload-consuming or sensors installed at additional cost. This study presents an approach obtained by TGC ...

Journal: :JCP 2012
Xiangzheng Xu

Because of using the nonlinear high-power, single-phase, multi-step full wave or bridge rectifier electric locomotive in electrified railway, the electrified railway traction power supply system has serious power quality problems, which affect safe operation of the electrified railway and impact the local power grid adversely. Aiming at the electrified railway power quality problems, a homogeni...

Journal: :Journal of epidemiology and community health 2011
Sabine Kunrath Jens Baumert Karl-Heinz Ladwig

BACKGROUND While coverage of a celebrity suicide in the mass media may trigger copycat suicides, evidence for the effect of media reports of non-prominent suicides is moderate. Diversification of current media may raise further doubts as to whether their influence on suicidal acts is still present. We examined whether widespread media coverage of a railway accident, in which several people were...

In this article, multiple-product PVRP with pickup and delivery that is used widely in goods distribution or other service companies, especially by railways, was introduced. A mathematical formulation was provided for this problem. Each product had a set of vehicles which could carry the product and pickup and delivery could simultaneously occur. To solve the problem, two meta-heuristic methods...

2016
Slawomir Mikrut Piotr Kohut Krystian Pyka Regina Tokarczyk Tomasz Barszcz Tadeus Uhl

The paper contains a survey of mobile scanning systems for measuring the railway clearance gauge. The research was completed as part of the project carried out for the PKP (PKP Polish Railway Lines S.A., Warsaw, Poland) in 2011-2013. The authors conducted experiments, including a search for the latest solutions relating to mobile measurement systems that meet the basic requirement. At the very ...

Journal: :Noise & health 2014
Sibylle Pennig Arthur Schady

In some regions the exposure to railway noise is extremely concentrated, which may lead to high residential annoyance. Nonacoustical factors contribute to these reactions, but there is limited evidence on the interrelations between the nonacoustical factors that influence railway noise annoyance. The aims of the present study were (1) to examine exposure-response relationships between long-term...

2014
O. Mirza Y. He S. Kaewunruen S. Krezo

Carbon pollution has become a sensitive topic across the globe in recent times. In Australia, incentive has been provided to industry in order to reduce carbon emissions in heavy polluting industries. The railway transportation system is one of the industries expected to reduce the emissions and contribute to a long term reduction strategy, although comparatively rail sector contributes much le...

Journal: :advances in railway engineering 0
anil ates istanbul transportation cooperation hakan celik istanbul transportation telecommunication and security tech.

after 1860’s the railway systems has started to be used in urban transportation in the world. however, especially after the 1950’s, automobile usage has been increased quickly. thus the dense of transportation has started to move from railway systems to the ones with rubber tire vehicles in istanbul. traffic density in urban transportation has started to be experienced since 1950 with the incre...

2017
Ruilin You Dan Li Chayut Ngamkhanong Rims Janeliukstis Sakdirat Kaewunruen

Railway Engineering Institute, China Academy of Railway Sciences, Beijing, China, Birmingham Centre for Railway Research and Education, School of Civil Engineering, The University of Birmingham, Edgbaston, United Kingdom, Department of Civil Engineering, Riga Technical University, Riga, Latvia, Department of Civil Engineering, School of Engineering, The University of Birmingham, Birmingham, Uni...

Journal: :Applied sciences 2022

Railways speedily transport many people and goods nationwide, so railway accidents can pose immense damage. However, the infrastructure of railways is complex that its maintenance challenging expensive. Therefore, using artificial intelligence for safety has attracted researchers. This paper examines applications safety, mainly focusing on deep learning approaches. first introduces methods wide...

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