强化全过程安全管理的CTCS-3级列控系统系统评估

分析介绍了CTCS-3级列控系统系统评估中安全计划、风险管理、安全需求、安全案例、相互认可等安全管理的关键要素,针对我国铁路应用实际,提出在进行定性系统评估基础上,逐步向定性与定量相结合的方向过渡,进一步降低运营风险,加强与国际标准接轨的理念。     

船体型材加工的逆直线方法

本文阐述了逆直线基本大批量，讨论了数值计算方法，分析了逆直线计算系统的功能与结构，给出了实船计算结果，并介绍了逆直线画线机的机械原理、性能和技术指标。     

Clean Water Act Section 404 and Coastal Marsh Sustainability

The “no net wetland loss” goal has not been met in urban coastal regions where conditions continue to exacerbate wetland losses. Under the Clean Water Act (Section 404) the U.S. Army Corps of Engineers and U. S. Environmental Protection Agency share responsibility for regulating placement of fill material in wetlands. The `no discharge of fill' rules threaten coastal wetlands with continuing losses due to effects of changing climate, including rising sea levels, higher storm surges, and flooding. Where inland migration is limited by development, or where sediment accretion rates are lower than the rate of sea level rise, urban wetlands will be lost unless marsh topography is elevated. We explored regulatory and design approaches in recent Hudson-Raritan Estuary (HRE), San Francisco Bay Estuary and coastal Louisiana restorations, including creation of new marshland using dredge material. Questions related to sea level rise, ecological position within the landscape, or potential effects of extreme storm events were not addressed in the HRE restoration designs; these concerns were taken into account in other regions. We suggest benefits of marsh `replenishment' should be acknowledged in Federal regulatory policy and that consistent policies supportive of low-lying coastal marsh preservation in all regions should be enacted.     

用十字万向联轴器实现可调多轴钻床

将十字万向联轴器的结构运用到多轴钻床上,实现可调多轴钻床,用于加工多种不同孔间距的零件及变形产品。     

Looking at sustainable urban mobility through a cross-assessment model within the framework of land-use and transport integration

In order to realise sustainable urban transport, it is necessary to combine different kinds of decision-making, including vision-led, plan-led and consensus-led approaches. In this paper, a cross-assessment model that supports both vision-led and consensus-led approaches is proposed as an analytical tool for developing sustainable urban transport and land use strategies for a low-carbon society. It is applied to an impact analysis of public transport and land use strategies in 2030 for all of Japan's 269 urban areas, with outcomes – including the financial balance of public transport operation, user benefits, and CO₂ emissions reduction – compared by strategy and urban area.     

用焊接法修复CQ30290型红岩自卸汽车钢板弹簧

认为对于损坏了的CQ30290型红岩自卸汽车的钢板弹簧可用焊接方法修复，但应防止热裂纹的产生。采用T506碱性焊条，对于直缝对接和开孔补扳两种方式来说，采用直缝对接效果不理想，易产生早期断裂，而采用开孔补板法修复钢板弹效果良好。     

路基沉降远程自动监测系统的研发

研发基于激光测量、先进传感和无线网络等技术的路基沉降远程自动监测系统。监测系统包括表面沉降激光自动测量、路基分层沉降与横向位移同时自动测量、路基横向剖面沉降自动测量和数据采集与无线传输4个子系统。表面沉降自动测量采用激光测量和自动标定技术实现;路基分层沉降与横向位移同时自动测量采用霍尔传感器、激光测距和倾角传感器实现;路基横向剖面沉降自动测量采用主、从电机带动倾角传感器实现。监测系统经实验室验证及工程化设计,在京沪高铁济南西站现场实验,实现了对路基整体沉降、局部沉降、截面内不同层沉降的长期、全面、远程自动监测。     

电子化双线双向自动闭塞系统的设计与实现

介绍时速160 km以下,即CTCS-0、CTCS-1级自动闭塞系统的电子化研究与实现。系统主机采用二乘二取二计算机平台搭载VxWorks实时操作系统,保障系统的实时性和安全性;全电子执行模块用于现场设备的驱动和数据采集。区间控制软件采用模块化设计,以闭塞分区为单位可以根据不同的区间灵活组合。系统在硬件和软件设计上都遵循故障-安全原则。经测试,系统安全、可靠,可以在现场试点使用。     

全站仪快速横断面测量系统功能与试验

公路工程横断面测量是外业勘测的主要工作,它的测量效率在很大意义上决定了公路工程测量的效率.主要介绍一种全站仪快速横断面测量系统的功能,并举例说明该系统在效率、精度等方面的优势.     

四线制改变运行方向电路故障分析

通过对区间改变运行方向电路发生的故障现象进行分析,提出了良好的解决措施,并对此方案予以推广