期刊文献+
共找到10篇文章
< 1 >
每页显示 20 50 100
工务普铁线路维修体制改革的探索与实践 被引量:1
1
作者 莫克议 《铁道运营技术》 2020年第1期56-59,共4页
在分析工务线路传统养修模式存在车间职责定位模糊主导作用不明显、车间对设备状态掌握不准计划安排不精准、缺少过程控制安全管理失衡等问题成因的基础上,回顾总结南宁局集团有限公司百色工务段维修体制改革的有益探索与实践,旨在为进... 在分析工务线路传统养修模式存在车间职责定位模糊主导作用不明显、车间对设备状态掌握不准计划安排不精准、缺少过程控制安全管理失衡等问题成因的基础上,回顾总结南宁局集团有限公司百色工务段维修体制改革的有益探索与实践,旨在为进一步做好工务普铁线路维修体制改革提供启示和借鉴。 展开更多
关键词 普铁 工务 改革 发展
下载PDF
高铁有砟轨道作业方法应用于普铁的思考
2
作者 廖成栋 《广西铁道》 2020年第1期38-39,48,共3页
目前普速铁路上机车运行速度越来越快,线路维修标准不断提高,作业要求愈发精细,以往的作业手段已无法满足普速铁路快速发展的要求。本文通过对高、普铁的作业方法进行介绍与分析,结合理论实践,提出将高速铁路有砟轨道的作业方法运用到... 目前普速铁路上机车运行速度越来越快,线路维修标准不断提高,作业要求愈发精细,以往的作业手段已无法满足普速铁路快速发展的要求。本文通过对高、普铁的作业方法进行介绍与分析,结合理论实践,提出将高速铁路有砟轨道的作业方法运用到普速铁路的日常维修保养中的意见和建议。 展开更多
关键词 高铁 普铁 作业方法 分析 运用 意义
下载PDF
浅谈普铁线路道岔打磨技术
3
作者 李瑞 《价值工程》 2020年第11期196-197,共2页
随着铁路快速发展,列车运行速度不断的提高,列车经过道岔速度成了制约整体运行速度的重要因素之一,普铁线路道岔钢轨的平顺性直接影响行车平稳、旅客舒适度提高、材料消耗减少、维修费用降低、线路设备寿命延长、机车车辆使用寿命及维... 随着铁路快速发展,列车运行速度不断的提高,列车经过道岔速度成了制约整体运行速度的重要因素之一,普铁线路道岔钢轨的平顺性直接影响行车平稳、旅客舒适度提高、材料消耗减少、维修费用降低、线路设备寿命延长、机车车辆使用寿命及维修周期。道岔区域岔尖、岔心、焊缝、心轨、翼轨等局部区域主要采用人工操作的小型打磨机进行现场作业打磨,因此对普速线路道岔钢轨及焊接接头打磨技术研究具有重要意义。本文针对工作过程中道岔利用小型打磨机打磨技术相关问题展开分析。 展开更多
关键词 普铁线路 道岔 打磨
下载PDF
几例普铁信号典型故障引发的思考
4
作者 王坤宇 《哈尔滨铁道科技》 2021年第3期10-11,23,共3页
本文通过对2018年几起反复发生的简单、典型的设备故障分析,深刻剖析产生问题的根本原因,从中吸取教训,引以为戒,进而真正能够实现D21事故压减、设备故障压减目标。
关键词 普铁 信号 故障 原因分析
原文传递
优化企业战略打造高铁普铁命运共同体
5
作者 宋平 《市场调查信息(综合版)》 2021年第11期165-165,共1页
面对国家发改委对铁路建设提出的新要求,如何平衡高铁普铁之间的关系,突破发展瓶颈?我们应该从调整企业发展战略、拓展企业经营战略和科学合理配置既有资源三个方面着手,全力打造高铁普铁命运共同体,做到物尽其用、人尽其才,才能使企业... 面对国家发改委对铁路建设提出的新要求,如何平衡高铁普铁之间的关系,突破发展瓶颈?我们应该从调整企业发展战略、拓展企业经营战略和科学合理配置既有资源三个方面着手,全力打造高铁普铁命运共同体,做到物尽其用、人尽其才,才能使企业保持长久的活力和竞争力。 展开更多
关键词 企业战略 高铁 普铁 命运共同体
下载PDF
工务普速线路维修体制改革的探索与实践
6
作者 马宏敏 《中国科技期刊数据库 工业A》 2021年第10期143-145,共3页
受影响的因素包括列车重量、自然条件、日常维护等,在铁路上行驶了很长时间后,有时会发生一些铁路设备问题,例如短路和轨道故障。如果无法有效解决问题,很容易导致更多的衍生产品问题,制定合理的维护策略不仅可以加快故障维修的效率,还... 受影响的因素包括列车重量、自然条件、日常维护等,在铁路上行驶了很长时间后,有时会发生一些铁路设备问题,例如短路和轨道故障。如果无法有效解决问题,很容易导致更多的衍生产品问题,制定合理的维护策略不仅可以加快故障维修的效率,还可以对延长铁路钢轨的使用寿命起到积极的作用。笔者结合自身多年工作经验,本次主要针对工务普速线路维修体制改革的探索与实践,展开深入论述,所得文献与同行业人员共享,望对行业的前进起到一定的促进作用。 展开更多
关键词 工务普铁 线路维修 体制改革 探索
下载PDF
Grout diffusion characteristics during chemical grouting in a deep water-bearing sand layer 被引量:4
7
作者 Ali Akbar Daya 《International Journal of Mining Science and Technology》 2012年第4期573-577,共5页
This paper is devoted to application of ordinary kriging method in Choghart north anomaly iron ore deposit in Yazd province, Iran. In order to estimate the deposit, 2329 input data gained from 26 boreholes were used. ... This paper is devoted to application of ordinary kriging method in Choghart north anomaly iron ore deposit in Yazd province, Iran. In order to estimate the deposit, 2329 input data gained from 26 boreholes were used. Fe grade was selected as the major regional variable on which the present research has focused. All of the available data were changed to 12.5 m composites so that statistical regularization could be reached. Studies indicated that iron grade input data had single-population characteristics. To carry out ordinary kriging, a spherical model was fitted over empirical variogram. Then the model was verified through cross validation method and proved to be valid with a coherence coefficient of 0.773 between the estimated and real data. Plotting the empirical variogram in different directions showed no geometric anisotropy for the deposit. To estimate the Iron grade, ordinary kriging method was used according to which, all of the exploitable blocks with dimensions 20 m x 20 m x 12.5 m were block esti- mated within the estimation space. Finally tonnage-grade curve has been drawn and reserve classified into measured, indicated and inferred. 展开更多
关键词 Choghart north anomalyOrdinary krigingGeostatisticsOre reserve estimation
下载PDF
Measurement and analysis of Doppler shift for high-speed rail scenario
8
作者 丁建文 Jiang Wenyi +2 位作者 Zhong Zhangdui Guan Ke Ai Bo 《High Technology Letters》 EI CAS 2015年第2期192-199,共8页
Based on the analysis of the impact of Doppler shift to the railway dedicated mobile communication quality under the condition of high-speed mobility,this paper presents a Doppler shift measurement approach based on t... Based on the analysis of the impact of Doppler shift to the railway dedicated mobile communication quality under the condition of high-speed mobility,this paper presents a Doppler shift measurement approach based on the phase estimation of frequency correction channel(FCCH) which correctly reflects the time-varying characteristic of the channel with a testing system developed.The Doppler shift data under the high-speed condition is collected,processed,analyzed,and compared with the simulation results.The scientific laws of the Doppler shift distribution of radio channel under high-speed condition are obtained.These data and analysis are essential for the establishment of high-speed railway Doppler power spectrum model and the development of the key technology of antiDoppler shift. 展开更多
关键词 Doppler shift high-speed railway (HSR) phase estimation software radio
下载PDF
Bridging Civilizations From Asia to Europe: The Silk Road 被引量:1
9
作者 Sadik Ridvan Karluk Suleyman Cem Karaman 《Chinese Business Review》 2014年第12期730-739,共10页
Throughout history, Silk Road played an important role with connecting more than 50 countries between its endpoints. Reviving this ancient trade route is a contemporary discussion among politicians. There are many pro... Throughout history, Silk Road played an important role with connecting more than 50 countries between its endpoints. Reviving this ancient trade route is a contemporary discussion among politicians. There are many projects realized and proposed for the resurgence of the modem Silk Road, including the railroad project connecting Baku, Tiflis and Kars of Azerbaijan, Georgia, and Turkey; the undersea rail tunnel under the Bosphorus strait, Marmaray; the Silk Road Economic Belt proposed by China; and the Maritime Silk Road, again proposed by China. Just like the original Silk Road, it was not only a route for caravans or trade, but it was a meeting point for cultural, religious, and philosophical exchanges that served humanity for centuries; today's modem Silk Road initiatives should be considered as bridges between Eastern and Western civilizations that will serve the same purpose of its ancient predecessor. The revived Silk Road will facilitate strengthening of relationships in between countries that experienced harmony in history. The railways, transportation facilities, transnational gates, energy corridors, and natural gas pipelines that constitute the Silk Road will transform the region with improving its economy and bringing peace and economic prosperity. With recent developments, it witnesses the importance of geopolitical and historical ties in establishing contemporary alliances. Although there are great expectations with the revival of the modern Silk Road, authors would like to emphasize that it should be an agreement to foster shared interests rather than the interest of bigger partners. 展开更多
关键词 modem Silk Road Silk Road Economic Belt economic development trade agreements GEOPOLITICS TURKEY
下载PDF
A Modified Doppler Frequency Trajectory Undergoing Varying Velocities in HSR Communications
10
作者 LIU Liu TAO Cheng +1 位作者 SUN Rongchen CHEN Houjin 《China Communications》 SCIE CSCD 2016年第1期17-21,共5页
The varying trajectory of Doppler frequency under changing speed motion conditionsare investigated in Highspeed Railway(HSR) scenarios.Based on the geometrical physical parameters,instantaneous Doppler trajectories an... The varying trajectory of Doppler frequency under changing speed motion conditionsare investigated in Highspeed Railway(HSR) scenarios.Based on the geometrical physical parameters,instantaneous Doppler trajectories and expression forms of the change rate arededuced,including acceleration and deceleration cases.These modified models provide more accurate and realisticapproximations in modeling rapidly fading channels. 展开更多
关键词 Doppler shift varying veloci-ty high speed railway.
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部