西安铁路局物资采购管理推行『五权分离』

在深化完善铁路局直管站段体制改革、重建物资管理新秩序、规范物资管理和筑牢物资质量安全的进程中,铁道部要求建立健全国有资产监管机制和铁路企业内控机制.西安局物资管理工作按照铁道部的要求,创新全局物资管理思路,重塑物资管理新模式,大力推行“阳光采购“,逐步建立规范的物资管理秩序,不断完善物资设备招标采购机制.在大宗物资设备采购方面,实行招标采购,逐步推行网上招标采购,并积极推行“决策、采购、验收、支付、使用五权分离“.“五权分离“模拟微机联锁的方式操作,“五权“为5个模块,某一模块出现漏洞或不按规定机制运作,下一模块即预警或报警,从而形成相互制约、相互监督的有效机制.……     

仓安路斜拉桥牵索挂篮横梁应力的室内试验

介绍了仓安路斜拉桥牵索挂篮横梁应力试验的设计、方案及过程,并对试验结果进行了分析。结果表明,挂篮在等效荷载作用下的承载力与理论计算吻合,挂篮的使用性能满足施工要求。     

青藏线DⅡK1933高路堤及湿地处理技术

结合地形、地质情况,从施工及设计角度分析了湿地地基处理措施;阐述了边坡高36m高路堤的稳定分析及施工质量控制.     

Dynamic Characteristic of Damaged Ship Structures Considering the Warping Deformations

For some largely damaged ships, the conventional methods are unadaptable to estimate their dynamic characteristics asto ships with symmetrical hull section. Based on dry hull modal analysis of flexure-torsion coupling vibration of unsymmetricalship structures about longitudinal center line, a transfer matrix method to calculate the dynamic characteristics is presented.Taken both shear effect and warping deformations into account, the point and field transfer matrices are derived, and the influ-     

基于产业链视角的城市地铁资源开发初探

各大城市地铁运营亏损比较普遍，各地政府在城市地铁建设投融资方面财政压力较大，如何实现地铁盈利成为各方共同关注的问题。研究认为，城市地铁资源的开发可以弥补地铁运营亏损，同时可以拓宽地铁建设资金的融资渠道。此文从产业链的角度分析城市地铁资源开发，从城市地铁房地产资源、地下商业资源、地铁广告资源和其他资源4个方面论述城市地铁资源的开发策略，以期为城市地铁资源开发工作提供参考。     

基于组态王的船舶锅炉水位PLC控制系统

本文介绍了用西门子S2-200可编程控制器实现锅炉水位的控制编程,并利用组态王软件制作人机对话界面,监控液位PLC控制系统的运行情况,并简单介绍了组态王与PLC通讯的注意事项及动画连接时的要求。实践证明,PLC与组态王结合具有很好的应用价值。     

AN/BVS-1光电桅杆工作站

对AN／BVS—I光电桅杆做了论述并就其工作站的特点、技术、结构、显控、物理特性和环境要求等方面进行了深入的介绍，同时对AN／BVS—I光电桅杆工作站的相关合同内容和今后研究计划也进行了介绍。     

Statistical Analysis of Ship Collisions with Bridges in China Waterway

Having carried out investigations on ship collision accidents with bridges in waterway in China, a database of ship collision with bridge (SCB) is developed in this paper. It includes detailed information about more than 200 accidents near ship' s waterways in the last four decades, in which ships collided with the bridges. Based on the information a statistical analysis is presented tentatively. The increase in frequency of ship collision with bridges appears, and the accident quantity of the barge system is more than that of single ship. The main reason of all the factors for ship collision with bridge is the human errors, which takes up 70%. The quantity of the accidents happened during flooding period shows over 3 - 6 times compared with the period from March to June in a year. The probability follows the normal distribution according to statistical analysis. Visibility, span between piers also have an effect on the frequency of the accidents.     

反前馈解耦方法的可实现性研究

文章提出了一种可实现的反前馈的解耦方法,以模拟锅炉为实验对象,以组态王软件为平台,得出解耦后的历史曲线,方法简单易行,解耦效果明显,说明此种解耦方法是可行的。     

LED灯具简介及其在客车上的应用

简要介绍LED灯具的结构、发光原理、特性及在客车中的应用。