نتایج جستجو برای: track structure

تعداد نتایج: 1623444  

Various numbering schemes are used to track different versions and revisions of files, software packages, and documents. One major challenge in this regard is the lack of an all-purpose, adaptive, comprehensive and efficient standard. To resolve the challenge, this article presents Quadruple Adaptive Version Numbering Scheme. In the proposed scheme, the version identifier consists of four integ...

Journal: :international journal of civil engineering 0
sadeghi j.m. school of railway engineering, iran university of science and technology, tehran, iran youldashkhan m.

in this paper, the main factors in the analysis of the railway concrete sleepers areinvestigated and new recommendations are made in order to improve the accuracy of the currentpractices in analysis of the railway track system. first, a comprehensive literature survey isconducted, then, fem models for a railway track system are developed and used to discuss andevaluate the assumptions commonly ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - پژوهشکده فنی و مهندسی 1388

asymmetric polyethersulfone (pes) microfiltration flat sheet membranes were composed by the phase inversion method (pim) and were used as supports. composite membranes were fabricated by coating silicone rubber as selective layer. effect of different concentrations of pes and pdms and different solvent such as nmp, dmf and dms effects as pes solvents and support thickness and different coagulat...

2015
W. Powrie D. J. Thompson S. Morley M. Hayward

Sections of railway line associated with variations in track stiffness often have an increased maintenance requirement owing to the relatively rapid deterioration of track geometry. Variations in stiffness could arise from changes in ground conditions, transitions from free track onto a fixed structure and other localised features. Increased dynamic loads may be responsible for track degradatio...

2011
Chunhui Dai Zhiqiang Long Yunde Xie Song Xue

This paper introduces in brief the traction system of a permanent magnet electrodynamic suspension (EDS) train. The synchronous traction mode based on long stators and track cable is described. A speed and position detection system is recommended. It is installed on board and is used as the feedback end. Restricted by the maglev train's structure, the permanent magnet electrodynamic suspension ...

Journal: :CoRR 2012
Jiaxing Shang Lianchen Liu Feng Xie Zhen Chen Jiajia Miao Xuelin Fang Cheng Wu

In this paper a simple but efficient real-time detecting algorithm is proposed for tracking community structure of dynamic networks. Community structure is intuitively characterized as divisions of network nodes into subgroups, within which nodes are densely connected while between which they are sparsely connected. To evaluate the quality of community structure of a network, a metric called mo...

ژورنال: Journal of Railway Research 2014
Giannakos, Konstantinos,

During the study for the dimensioning as well as the selection of the individual materials constituting a railway track, the ballast and the substructure present residual deformations, directly related to the deterioration of the geometry of the track. The slighter the residual deformations and the slower their alteration over time is, the better the quality of the track. The actions acting ...

2004
Samuel Bayer John D. Burger Warren R. Greiff Ben Wellner

In this paper, we describe MITRE’s contribution to the logical form generation track of Senseval-3. We begin with a description of the context of MITRE’s work, followed by a description of the MITRE system and its results. We conclude with a commentary on the form and structure of this evaluation track.

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