Results 71 to 80 of about 215,097 (287)
Sustainability analysis of Chinese transport policy [PDF]
, 2001 Whilst the world economy is developed, the life and development of human beings have been threatened by the imbalance among environmental and ecological aspects. Thus sustainability is becoming increasingly the focus of various social fields. For most
Chen, H., Mao, B.
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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
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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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
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
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Commercialising Australia's interstate rail freight transport: Some ownership and investment issues [PDF]
, 1995 The paper addresses the issues of rights of way ownership and application of consistent investment appraisal techniques across modes of transport. There are linkages between ownership, rights of way, competitive strategies and market contestability which
Ferreira, Luis, Williams, Alan W.
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Critical expansion points: Mechanical signs of surrounding rock instability
Deep Underground Science and Engineering, EarlyView.This study proposes the Rock Bearing‐Expansion Model (RockBEM) with critical expansion points (CEPs) to quantify post‐peak damage stages in deep‐buried rock masses via plane strain compression test (PSCT). CEP hysteresis&interval ratios reveal bearing performance dynamics and failure severity, advancing mechanistic insights into deep underground rock ...
Jiaqi Wen +4 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
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Deep Underground Science and Engineering, EarlyView.Inspired by spiders, the multilegged walk‐through assembling robot for arc parts achieves high‐precision synchronous control under heavy loads through dual‐layer hydraulic pose dynamics modeling and hierarchical pressure optimization, significantly enhancing shield tunneling assembly efficiency and precision.
Quan Xiao +5 more
wiley +1 more source
Perspektive integracije zapadnoevropskih železnica
Promet (Zagreb), 2012 The author first deal with the essence of integration processes on the EC member state railways to point out the problems related to the discontinuation of the state patronage over the railways. Forecasts refer to the introduction of the European 'Agency
Branislava Božinović, Zoran Bundalo
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