高速铁路CRTSⅡ型轨道板轨道精调测量技术

结合中铁十五局京沪高速铁路CRTSⅡ型板式无砟轨道精调测量施工经验,从轨道几何形态描述、轨道几何形态参数测量原理和测量要点、精测数据内业分析处理等几个方面对轨道精调测量技术进行分析总结,认为在测量过程中要特别注意以下两点：全站仪设站的位置应靠近线路中线,并且与近处控制点的距离至少大于15m;变更基准轨确定方法。     

车载探地雷达在新建铁路路基质量普查中的应用

简要介绍了车载探地雷达原理、系统及在新建铁路路基质量普查中的应用情况。车载探地雷达,可迅速了解全线路基基床的状况和道床厚度等有关信息,以及探测桥涵两端与一般路基工后沉降等基床病害。经实地挖探验证与现场实际情况较为吻合。车载探地雷达,能够快速、准确、真实地检测路基的质量状况。     

考虑弯曲刚度及边界约束的短索内力识别

对于长度较短的拉索,其弯曲刚度和边界约束对索力的识别结果影响较大.文中针对工程中短索内力的识别,在同时考虑其弯曲刚度及边界约束的情况下,提出了等效长度的概念,利用数值计算方法,将两端固支以及一端固支一端铰支约束下拉索内力识别转换为两端铰支约束下拉索内力识别问题,其既可利用现有拉索内力识别给予的简捷,又可避免求解超越方程所带来的困难,从而可获得较为简单实用的拉索内力识别技术.     

基于大学教育构建道路交通安全社会教育体系的探索

制约我国道路交通安全水平的关键因素是教育。利用大学教育的特性、优势和资源,在大学中建立道路交通安全的素质教育体系,以此为核心构建全社会道路交通安全教育系统,为我国道路交通安全发展建立坚实基础。     

Impact of special shipping across the Taiwan Straits on the employment of Taiwanese ship officers

Nowhere else in the world are there marine transportations highly confined than across the Taiwan Straits (mainland China and Taiwan). This study strives to explore the present employment status of Taiwanese ship officers under the influence of special shipping across the Taiwan Straits, and to make sure if such an employment trend has a negative impact on the future operating mode of Taiwan shipping companies. By means of field interview and questionnaire, this study collected the employment data of ship officers from 21 leading shipping companies in Taiwan, and made a statistical analysis. The research findings show that the existing cross-strait shipping relationship, which is seriously distorted by the hostility between the governments of Taiwan and mainland China across the Taiwan Straits, has made Taiwanese shipping companies turn to flagging-out in order to enter the extensive shipping market of mainland China. This leads to a decline of job opportunities for Taiwanese ship officers. Ironically, the ship officers from mainland China pose a biggest threat to those in Taiwan in this respect. In addition, the operating modes of Taiwanese shipping companies also change gradually in tune with the increasing number of non-Taiwanese ship officers (mainly those from mainland China).     

Monitoring Aircraft Turnaround Operations – Framework Development,Application and Implications for Airline Operations

Abstract

A real-time operation monitoring system – Aircraft Turnaround Monitoring System – is developed based on a system framework to monitor aircraft turnaround operations at an airport. Mobile computing devices (PDAs) and wireless network technology General Packet Radio Service (GPRS) are used to implement the real-time monitoring system for an airline. System implementation and test results indicate that real-time operation monitoring can potentially reduce delays occurring from airline operations. Proactive measures can be taken immediately by ground handling staff to reduce delays, once the risk of delays and potential delay propagation is identified. The availability of detailed operating data can help airlines identify the root delay causes from complex connections among aircraft, flight/cabin crew and passengers. In addition, these operating data also shed some light on the future development of aircraft routing algorithms in order to consider explicitly stochastic disruptions and delay propagation in airline schedule planning.     

复杂环境下浅埋隧道的爆破震动监测与控制技术

深圳地铁5号线和7号线在太安站—怡景站区间为浅埋暗挖隧道,地表建筑物密集,按规范规定必须在爆破施工的同时进行震动监测,以保证施工环境的安全.文章选取了有代表性的监测断面,对其监测数据进行了分析,得出了沿隧道径向和法向的震动规律:径向上,在掌子面(0测点)两侧对称的测点的震动速度规律反映为成洞区大于开挖区;法向上,以掌子面(0测点)为中心,往两个方向呈现震速下降的趋势,而且近似线性下降.分析结果表明,采用密集减震孔和竹节的减震方法能够起到明显的减震效果,径向的减震效果比法向的要好.     

混合动力客车CAN总线通信系统故障与抗干扰的研究

混合动力客车上由于电磁环境异常复杂,通信节点众多,从而造成CAN网络通信的容错能力下降。本文描述了安凯HFF6140K07CHEV插电式混合动力客车中几种常见的CAN总线故障表现形式,并通过分析CAN网络中的常见故障类型,最终给出相应的抗干扰解决方案。     

转炉钢渣集料微观性能研究

采用现代测试技术研究了不同形态转炉钢渣的矿物组成和钢渣表面元素分布特征。从工程集料优选角度,结合实验结果,得出密实型钢渣更加适用于沥青路面层。钢渣表面丰富的钙元素赋予其与沥青良好的粘附性。     

基于驾驶特性的超车模型研究

超车行驶作为驾驶人行车过程中重要的行为之一,与行驶安全性有着直接的联系。为建立符合驾驶人操作习惯的超车模型,本文通过实车试验采集不同驾驶人在高速公路的超车行驶数据,并以此采用多项式回归拟合建立基于驾驶人操作特性的超车模型,最后利用prescan软件对提出的超车模型进行了仿真分析,结果表明建立的超车模型能够真实地反映驾驶人超车过程中的操作习惯,为超车行为的研究提供了可靠的理论依据。