Results 91 to 100 of about 430,799 (337)
Fiber-optic sensors : applications and advances [PDF]
, 2005 Even before fiber optics made it big in the telecom industry, the technology was showing promise in the fields of industrial and environmental sensing.
Culshaw, Brian
core +2 more sources
Deep Underground Science and Engineering, EarlyView.The permeability variation of rocks during complete stress–strain processes was investigated. A mathematical model describing the influence of rock damage on permeability was constructed. The permeability–stress relationship between soft rock and hard rock was proposed.
Zhen Huang +6 more
wiley +1 more source
Testing for Economies of Scope in European Railways: An Efficiency Analysis [PDF]
In this paper, we conduct a pan-European effciency analysis to investigate the performance of European railways with a particular focus on economies of vertical integration.
Christian Growitsch, Heike Wetzel
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Creep properties and constitutive model of diabase in deep water conveyance tunnels
Deep Underground Science and Engineering, EarlyView.The axial and lateral creep characteristics of diabase were analyzed based on compression creep tests. The nonlinear viscoelastic‐plastic model capable of describing the whole creep process was established based on the fractional derivative and damage theories.
Zhigang Tao +5 more
wiley +1 more source
Private capital, public credit and the decline of American railways in the mid-20th century [PDF]
From the mid-19th Century until the Great Depression, banks, insurance companies and other large institutional investors supplied railways with external capital that supported their rise to near hegemony over transport in the U.S.
Cohen, Jim
core +1 more source
Are Britain’s railways costing too much? Perspectives based on TFP comparisons with British Rail: 1963-2002. [PDF]
, 2004 Following the Hatfield accident in October 2000, the cost of running Britain’s railways has increased very sharply, leading to considerable debate about whether current cost levels are reasonable.
Smith, A.S.J.
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Deep Underground Science and Engineering, EarlyView.This paper investigates the high‐pressure water jet‐pick combined rock‐breaking mode (HPC), which employs high‐pressure water jets to precut grooves on both sides of the picks. The rock‐breaking patterns and performance of the HPC method are obtained, and the auxiliary rock‐breaking mechanism of water jet grooving is revealed.
Jingjing Lu +6 more
wiley +1 more source
European Railway Comparisons – Company Profiles [PDF]
, 1992 This work was undertaken as part of a project sponsored by the British Railways Board entitled `European Railway Comparisons'. The aims of this project are as follows: (i)To compare the current efficiency of European railway operators and examine ...
Nash, C.A., Preston, J.M.
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Deep Underground Science and Engineering, EarlyView.Abstract As tunnel construction advances in lengths and depths, the construction of tunnels in high geothermal environments has become increasingly common, raising significant fire risks. In this study, a 1:20 scale model tunnel test platform was constructed to investigate the effects of a high geothermal environment on fire behavior in tunnels during ...
Xiaoxian Fei +6 more
wiley +1 more source
Evaluating the Efficiency of Iranian Regional Railways [PDF]
International Journal of Railway Research, 2015 Railway transportation plays an important role in the economic development of Iran. National Iranian Railways includes fifteen regional railways which operate independently, but under the supervision of National Iranian Railways Company.
Hamid Reza Ahadi, Zahra Saghian
doaj