نتایج جستجو برای: speed railway bridge

تعداد نتایج: 269187  

2012
Dan ZHAO

Historically, changes in transport infrastructures have produced a progressive contraction of space, in the sense that travel times have been shortened and transport costs have been reduced. Improvement of transportation networks reduces interaction costs, increases the overall competitiveness of the system and allows for more specialization such that economies of scale and specialization benef...

2016

structural engineering bridge design PDF handbook of international bridge engineering PDF railway bridge and tunnel engineering PDF johnson victor bridge engineering PDF recent advances in sensing technology lecture notes in electrical engineering PDF recent advances in the processing of wood-plastic composites engineering materials PDF agricultural land redistribution and land administration i...

2014
Qulin Tan Xiao XU

SAR differential interferometry is an innovative space-based measurement technology for ground deformation. Under inclement Qinghai-Tibet plateau environment, monitoring and analysis of railway subgrade deformation using satellite interferometry in plateau permafrost region has very important engineering significance for stability evaluation and safety management. In the paper, a brief descript...

2015
Yunhao Yao Yuanfu Li

The project named “the rescue system and key technology of high-speed railway in perilous mountains” primarily focuses on current railway constructions and operations in China. To state the relationship between risk events and risk factors, we classified the risk sources of operating tunnels of high-speed railway in perilous and mountainous area and established a hierarchical assessment system ...

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