Results 81 to 90 of about 40,753 (316)

A simple state-based prognostic model for railway turnout systems [PDF]

, 2010
The importance of railway transportation has been increasing in the world. Considering the current and future estimates of high cargo and passenger transportation volume in railways, prevention or reduction of delays due to any failure is becoming ever ...
Baskan, Saim, Sevkli, Mehmet, Guclu, Adem, Camci, Fatih, Yilboga, Halis, Eker, Ömer Faruk   +5 more
core   +1 more source

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, Chang Deng, Haijun Wang, Lei Tang, Jihong Yu   +4 more
wiley   +1 more source

An investigation into rail corrugation evaluation based on fractal theory and explicit finite element method

Scientific Reports
Rail corrugation poses a persistent challenge in railway engineering, aggravating rolling contact fatigue and adversely affecting passenger comfort.
Yao Qian, Hui Zhu, Taoshuo Bai, Kai Wang, Jian Yang, Jingmang Xu, Ping Wang, Xiaochuan Ma   +7 more
doaj   +1 more source

The influence of structural response on ballast performance on a high speed railway

, 2014
Track for modern ballasted high speed railway lines typically uses continuous welded rail with continuous ballast. Continuous ballast is often specified over features involving discontinuity of track support including structural movement or expansion ...
Powrie, W., Hayward, M., Thompson, D.J., Watson, G.V.R, Le Pen, L., Morley, S., Milne, D.   +6 more
core  

Applications of Fast-Moving RFID Tags in High-speed Railway Systems

, 2011
RFID technology has been widely utilized for the tracking and identification of numerous stationary and moving objects. One of the most challenging RFID applications has to do with the improvement in reliability, scheduling and efficiency of large‐scale ...
Tentzeris, Manos, Zhang, Xiaoqiang, Xiaoqiang Zhang, Manos Tentzeris   +3 more
core   +1 more source

Motion planning and control of an installation robot for attitude adjustment of arc parts in underground shield tunneling

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, Guofei Xiang, Liang Liao, Lai Wei, Hongli Wang, Songyi Dian   +5 more
wiley   +1 more source

Seismic analysis and design of tunnels within fault ground: A review

Deep Underground Science and Engineering, EarlyView.
The research methods of seismic response of tunnels within fault ground, including field investigations, analytical solutions, physical experiments, and numerical simulations, and seismic countermeasures are discussed. The present study examines the shortcomings and limitations of the current research and design, and puts forward proposals for future ...
Xingda Wang, Yujing Jiang, Xuepeng Zhang, Yuyong Jiao, Ningbo Li, Xiao Wang, Bo Li   +6 more
wiley   +1 more source

Carbon emission assessment of tunnel infrastructures: From construction to operation

Deep Underground Science and Engineering, EarlyView.
This study develops a lifecycle carbon accounting framework for tunnel infrastructures, covering design, construction, operation, maintenance, and dismantling. Applied to a subsea tunnel case, the framework reveals the carbon emission distribution among four typical tunnel types and highlights potential carbon offset methods for low‐carbon tunnel ...
Luyuan Long, Wout Broere, Xuehui Zhang, Tian Xia, Richard de Nijs   +4 more
wiley   +1 more source

Effect of Cement Asphalt Mortar Debonding on Dynamic Properties of CRTS II Slab Ballastless Track

Advances in Materials Science and Engineering, 2014
The debonding of cement emulsified asphalt mortar (CA mortar) is one of the main damage types in China railway track system II slab ballastless track.
Ping Wang, Hao Xu, Rong Chen
doaj   +1 more source

Plant adaptive strategies respond to environmental change across European grassland habitats

Ecography, EarlyView.
Grassland ecosystems are facing rapid and ongoing change driven by intensified land‐use and accelerated climate change, highlighting the urgent need to understand their potential adaptation and response to environmental change. We analyzed data from 52 980 vegetation plots spanning all major grassland habitats in Europe (including alpine, rocky, sandy,
Xiao‐Peng Tan, Petr Pyšek, Milan Chytrý, Irena Axmanová, Jan Divíšek, Ilona Knollová, Svetlana Aćić, Idoia Biurrun, Hans Henrik Bruun, Jürgen Dengler, Tetiana Dziuba, Emmanuel Garbolino, Attila Lengyel, Jonathan Lenoir, Ricarda Pätsch, Aaron Pérez‐ Haase, Valerijus Rašomavičius, Eszter Ruprecht, Urban Šilc, Kiril Vassilev, Yi‐Jun Wang, Wen‐Yong Guo   +21 more
wiley   +1 more source