Results 121 to 130 of about 847,489 (307)
Structural Optimization and Comparative Analysis of B-type Metro Bogie Frame
机车电传动, 2019 According to the service life of bogie frame of a project can not meet the operation requirements, by comparing and analyzing the time-domain and frequency-domain diagrams of line dynamic stress test data, the optimal structure scheme was put forward ...
Qingwei SONG +4 more
doaj
Research on Metro Vehicle Wheel Wear and Reprofiling Strategy
Chengshi guidao jiaotong yanjiuObjective Wheel wear directly affects the vibration environment of metro vehicles. Severe abnormal wear can lead to structural fatigue exceeding the limit, reducing the safety of train operation.
JIA Xiaoping +3 more
doaj +1 more source
Deep Underground Science and Engineering, EarlyView.Abstract One of the significant challenges faced in shield tunnel construction is the risk of collapse resulting from abrupt changes in soil conditions in advance of the working face, particularly within the sandy cobble stratum. This study aims to effectively manage these sudden variations and to further investigate the failure mechanisms associated ...
Hua Jiang +4 more
wiley +1 more source
Design of Train Remote Monitoring System Based on ZigBee and GPRS Technology
机车电传动, 2012 A metro train traction motor and gear box remote monitoring system was designed in this paper, which was based on ZigBee network, GPRS remote transmission and labVIEW-writed PC software.
葛玉荣, 时晓艳, 刘金涛
doaj
Deep Underground Science and Engineering, EarlyView.This study investigates the blast‐induced rock damage patterns under different cut‐hole layouts and ground stress conditions through numerical simulations and field tests. The findings in this study provide valuable insights for similar underground engineering applications.
Junjie Zhao +5 more
wiley +1 more source
Structural Analysis of PSD Mechanical System Based on FEA
机车电传动, 2012 Structural analysis model of metro platform screen door (PSD) mechanical system was built, and FEA method was employed to study the modal and structural stiffness of PSD system for getting the natural frequencies and vibration modes from modal analysis ...
应寅琼, 江虹, 李成, 谢永清
doaj
Chengshi guidao jiaotong yanjiuObjective When using convolutional neural networks (CNNs) for the state detection of catenary system cotter pins, the imbalance between positive and negative samples leads to a low detection rate of missing pins in the network model. Thus, a single-stage
SHAN Chonghao
doaj +1 more source
Resonance‐induced restoration of rock permeability degraded by heavy components of crude oil
Deep Underground Science and Engineering, EarlyView.Resonance‐induced changes occur in filtration properties of sedimentary rocks in crude paraffin oil flow under acoustic vibrations. Experimental data on (a) pressure drop; (b) permeability; (c) pressure at the rock inlet; and (d) pressure at the rock outlet are presented.
Evgenii Riabokon +6 more
wiley +1 more source
Chengshi guidao jiaotong yanjiuObjective In the actual metro construction, it is often necessary to lay turnouts on large-slope sections due to planning and construction constraints, land conservation or topographical limitations.
CHEN Qiaosong +6 more
doaj +1 more source
, 2012 REGU negara mengukuhkan status 'jaguh kampung' apabila menjuarai kejohanan Sepak Takraw Terbuka Universiti Putra Malaysia(UPM) kelima yang berlangsung baru-baru ini sekali gus meraih hadiah wang tunai RM1 ...
Harian Metro,
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