基于运行速度的高速公路线形评估

通过简介国外道路安全评价工作,阐述开展道路安全评价的必要性。公路线形条件与公路交通安全有着密切的联系,顺畅的线形是行驶安全的基本保障。从提高道路安全角度出发,对公路线形设计中潜在的不利安全因素进行鉴别以便消除或减弱道路危险因素,就显得尤为重要。通过对运行速度的计算,并分析了公路运行速度与道路组成部分的联系,提出相应的安全评价指标和建议。最后结合实际工程,找出了设计中潜在的安全隐患并为以后设计提供相应的建议。     

石砌U型高桥台破坏机理及加固改进对策研究

石砌U型高桥台是西部山区公路建设中广泛采用的结构形式,也是一个受力复杂的砌体结构,在填土荷载和车辆荷载作用下经常发生局部开裂破坏,其破坏机理尚不清楚,为了研究其破坏机理并解决局部开裂破坏问题,本文采用常规U型桥台及钢筋混凝土圈梁及倒角加固改进后的10∶1模型进行试验研究,并进行了三维有限元分析。通过试验及计算结果,基本摸清了其破坏机理,并验证所采用的改进方法简单可靠。     

胶济铁路干线调度集中系统的研究

调度集中系统是铁路运输调度指挥的重要行车设备，是提高铁路调度指挥效率、保证行车安全的重要系统。分散自律调度集中系统是综合了计算机技术、网络通信技术和现代控制技术，采用智能化分散自律设计原则，以列车运行调整计划控制为中心，兼顾列车与调车作业的高度自动化的调度指挥系统。现以胶济线为背景，详细分析胶济线的运输组织模式及运输作业特点，总结该线铁路运输规律，在此基础上提出了适用于繁忙铁路干线的调度集中系统方案，探讨了调度集中系统的应用对传统运输组织模式所带来的变革。胶济线调度集中系统的应用，为全路繁忙铁路干线实现调度集中指挥提供了示范。     

Numerical modelling of fish eggs dispersion at the Patos Lagoon estuary — Brazil

The Patos Lagoon estuary is the most important nursery ground for commercially relevant species of fish and crustaceans in the South of Brazil, maintaining fisheries that sustain 3500 fisher families throughout the Rio Grande do Sul State coastline. Around 80% of the interior estuarine area is very shallow (< 2 m), and recruitment of fish eggs and larvae to the inner parts of the Patos Lagoon estuary is directly related to the circulation pattern in the area, which is controlled by local and non-local wind effects and freshwater discharge. The objective of this study is to investigate the processes controlling the transport of estuarine dependent fish eggs between the Atlantic Ocean and the Patos Lagoon estuary.An integrated numerical system based on a bi-dimensional hydrodynamic model and a Lagrangean transport model of passive particles is applied to a selection of scenarios representing the passage of weather fronts over the area. At this stage, fish eggs are represented as buoyant passive particles. Modelling results are compared against field data for the period under investigation (September/October 1999) and historical records. Short term results are analysed in terms of the meteorological conditions (wind direction, intensity and duration) controlling the transport of eggs to the inner parts of the estuary and the extension of their excursion. This experiment is the first attempt to couple biological and physical information to study fish eggs transport, and to enhance the current knowledge about recruitment of important fisheries resources in southern Brazil.     

电子产品电磁兼容试验方法及基本解决方案

就各项试验的试验方法作了简单的解释并对出现的共性问题进行了分析，提出解决问题的建议。     

重庆轻轨较新线ATP／TD信号系统

重庆轻轨较新线（2号线）东起市中心商业繁华地带的较场口，至西部工业中心新山村，共设18个车站，一个综合维修基地，全长19．1km。重庆轻轨较新线一期工程设14个车站，全长14．35km，已于2004年6月28日实现区段试运行，2004年12月28日实现全线通车试运行，将于2005年6月28日投八正式运行。二期工程也将于2005年底完成建设。     

应加强土工新材料使用管理、总结提高

随着科学进步的日新月异,各种新的土工材料在不断出现.设计部门也都在有关的设计中积极地推广和使用.尤其是土工网、格室、格栅、固土网垫等在铁路路基防护中已被较广泛的采用.然而,就个人所见,这些新材料在个别地段使用还没有达到预期的效果,因此,呼吁有关部门予以重视,尽快予以改进和完善.     

The EEZ and the progress of fisheries negotiations January to May 1977

This paper discusses negotiations, relative to sea fisheries, in terms of international arrangements—arrangements between the European Economic Community (EEC) and Third Countries; and those between member states of the EEC.     

Comparative Analysis of Dynamic ShuttleSystem and the Existing High Speed Ground Transportation Systems

The dynamic shuttle system treated in this paper consists of main line trains traveling at a fixed speed. Passengers are shuttled to and from these fixed speed trains by means of shuttle cars. The shuttle cars can provide local service and thus alleviating the need for stations along the route of the main line trains. The main line trains have a peak volume, depending upon operating speed which is an order of magnitude greater than existing modes. They provide high speed service to travelers in the belt traversed by the trains.