Results 21 to 30 of about 216,906 (258)

Stiffness Characteristics of High-Speed Railway Turnout and the Effect on the Dynamic Train-Turnout Interaction

Shock and Vibration, 2016
Track stiffness in railway turnouts is variable due to differences in structural composition along the longitudinal direction, which will lead to severe dynamic interaction between train and turnout. In this paper, a transient analysis model is presented
Jingmang Xu, Ping Wang, Xiaochuan Ma, Yuan Gao, Rong Chen   +4 more
doaj   +1 more source

A Closed-Form Solution for 3D Source Localization Using Angles and Doppler Shifted Frequencies

IEEE Access, 2023
Moving source localization in 3-D space using frequencies of arrival (FOA) have recently made significant progress with the development of closed-form solutions.
Zhu Jiandong, Ding Ting, Qiao Lijuan
doaj   +1 more source

Experimental Research on Compression Properties of Cement Asphalt Mortar due to Drying and Wetting Cycle

Advances in Materials Science and Engineering, 2014
Uniaxial compression test of cement asphalt (CA) mortar specimens, due to drying and wetting cycle of 0, 2, 4 and 8 times, is carried out by using the electronic universal test machine, with the strain rate ranging from 1 × 10−5 s−1 to 1 × 10−2 s−1.
Ping Wang, Hao Xu, Rong Chen, Jingmang Xu, Xiaohui Zeng   +4 more
doaj   +1 more source

An Enhanced LMMSE Channel Estimation under High Speed Railway Scenarios

, 2017
With the rapid deployment of the high speed railway (HSR), the wireless communication in HSR has been one of the indispensable scenarios in the fifth generation (5G) communications. In order to improve the performance of the orthogonal frequency division
Li, Yuli, Long, Hang, Tang, Qing, Yang, Haojun   +3 more
core   +1 more source

Hot Tensile Behavior of 05Cr17Ni4Cu4Nb Stainless Steel: Damage Model and Fracture Characteristics

Metals
This study investigates the hot tensile behavior and fracture characteristics of 05Cr17Ni4Cu4Nb stainless steel through isothermal tensile tests conducted under various deformation parameters.
Jing Yuan, Hongjun Jiang, Liwei Zheng, Kuangyu Zhang   +3 more
doaj   +1 more source

Dynamic Response of Wheel-Rail Interaction at Rail Weld in High-Speed Railway

Shock and Vibration, 2017
As a main part of continuously welded rail track, rail weld widely exists in high-speed railway. However, short-wave irregularities can easily initiate and develop in rail weld due to the limitation of welding technology and thus rail weld has been a ...
Boyang An, Ping Wang, Jieling Xiao, Jingmang Xu, Rong Chen   +4 more
doaj   +1 more source

Landslide Deformation Monitoring by Adaptive Distributed Scatterer Interferometric Synthetic Aperture Radar

Remote Sensing, 2019
Landslide is the second most frequent geological disaster after earthquake, which causes a large number of casualties and economic losses every year. China frequently experiences devastating landslides in mountainous areas.
Hongguo Jia, Hao Zhang, Luyao Liu, Guoxiang Liu   +3 more
doaj   +1 more source

Improving the activity of waste concrete recycled powder by a mechanical-microwave combing method [PDF]

Railway Sciences
PurposeThe efficient utilization of recycled concrete powder (RCP) has attracted much attention. To break through the limitation of single activation technology of RCP, this study investigates the effects of a mechanical-microwave method on the ...
Henan Shi, Huajian Li, Liangshun Li, Haoliang Dong, Zhen Wang, Wenxiao Ji   +5 more
doaj   +1 more source

Research on dynamic stiffness match form of indirect fastener based on rail high-frequency wear characteristics

Scientific Reports
The stiffness combination of the dual-layer pads in indirect fastener systems significantly influences high-frequency wheel-rail wear behavior. However, the actual stiffness exhibits strong nonlinearity and non-uniformity due to the deformation of the ...
Xian Wang, Kai Wei, Qianhua Pu, Zelong Liu, Guodong Li, Ping Wang   +5 more
doaj   +1 more source

Study on the strain response characteristics of coal and rock borehole walls under high-pressure gas fracturing

Gong-kuang zidonghua
There has been a lack of precise methods for monitoring and evaluating the entire process of gas fracturing. However, strain monitoring can effectively record the real-time initiation and propagation of cracks. By studying the strain response of borehole
KONG Zixing, MA Yankun, YANG Fade, WANG Xiaoqi, GONG Liqiang, JIANG Mingfeng   +5 more
doaj   +1 more source