简析广州大学城交通

区域的发展，离不开交通的支撑，交通问题成了影响大学城可持续发展的重要因素之一。本文简述广州大学城交通具有道路网密集、停车场存在供求矛盾等特点，并概括大学城师生表现出学生以公共交通出行为主、师生出行耗时长、换乘不便等出行特征，由此揭示大学城存在公交班次设计不尽合理、超载现象时有发生等问题，最后提出根据客流情况而适当增加班次、设置进入校园的路标指示牌、实行必要交通管制等建议与对策。     

Designing a route planner to facilitate and promote cycling in Metro Vancouver,Canada

With increasing fuel costs, greater awareness of greenhouse gas emissions and increasing obesity levels, cycling is promoted as a health promoting and sustainable transport mode. We developed a cycling route planner (http://cyclevancouver.ubc.ca) for Metro Vancouver, British Columbia, Canada, to facilitate cycling amongst the general public and to facilitate new route location by transportation planners. The geographical information system-based planner incorporates variables that influence choices to travel by bicycle (e.g., distance, elevation gain, safety, route features, air pollution and links to transit) in selecting the preferred routing. Using a familiar and user-friendly Google Maps interface, the planner allows individuals to seek optimized cycling routes throughout the region based on their own preferences. In addition to the incorporation of multiple user preferences in route selection, the planner is unique amongst cycling route planners in its use of topology to minimize data storage redundancy, its reliance on node/vertex index tables to increase efficiency of the route selection process, and the use of web services and asynchronous technologies for quick data delivery. Use of this tool can help promote bicycle travel as a form of active transportation and help lower greenhouse gas carbon dioxide (CO₂) and air pollutant emissions by reducing car trips.     

Determining the hydrodynamic forces on a planing hull in steady motion

A combination of methods was developed that can determine hydrodynamic forces on a planing hull in steady motion. Firstly, a potential-based boundary-element method was used to calculate the hydrodynamic pressure, induced resistance and lift. Then the frictional resistance component was determined by the viscous boundary layer theory. Finally, a particular empirical technique was applied, to determine the region of upwash geometry and determine spray resistance. Case studies involving four models of Series 62 planing craft were run. These showed that the suggested method is efficient and capable, with results that are in good agreement with experimental measurements over a wide range of volumetric Froude numbers.     

利用激光测振技术对轿车车身进行模态分析

以柱面光束为发射光，采用雪崩管为接收器、宽频频率跟踪器为信号处理装置的激光测速仪，对轿车车身的响应速度进行测量，激光测速仪输出的信号经Ａ／Ｄ转换和ＦＦＴ变换后，可方便地得到频响函数，再经试验模态软件进行分析，从而得到模态参数及其振型数据等。     

浅谈立柱在木材甲板货绑扎系统中的应用

本文概述了运木船的木材甲板货绑扎系统的定义和基本要素。并对该系统中的立柱。尤其是活动立柱的结构和布置提出了一些看法和意见。     

基于3S技术的公路建设影响洞庭湖湿地生态环境评价指标体系研究

依据大量相关研究、文献资料和洞庭湖区的实地考察,分析了导致洞庭湖湿地生态环境历史演变的各种影响因素。就公路建设影响洞庭湖湿地生态环境的主要效应进行了研究。认为公路城镇化效应以及公路水利效应是影响的主要方面。建立了相关的评价指标体系。指标体系由公路等级指标、公路城镇化效应指标以及公路水利效应指标构成。为基于3S技术监测评价公路建设影响洞庭湖湿地生态环境奠定了基础。     

车轮定位参数快速检测新方法研究

对车轮侧滑量与定位参数的相互影响关系进行了理论分析，在采集的东北三省汽车综合性能检测线的检测数据基础上，建立了基于神经网络理论的车轮侧滑量信息与主要定位参数的数学模型，提出了一种汽车检测线中车轮定位参数快速检测的新方法。     

摩托车排气污染物排放第3阶段控制标准探讨

我国摩托车排放第3阶段控制标准的制订要结合我国摩托车产品结构特点和道路情况,力求规定的摩托车排气污染限值和试验方法合理有效、切实可行,具有可操作性,达到降低我国摩托车有害气体排放的目的。本次标准主要依据为大气污染防治法、摩托车排放污染防治技术政策和EU指令2002／51／EC、2003／77／EC。     

挖掘装载机的发展及应用前景

0前言 挖掘装载机是一种前端带装载装置，后端带挖掘装置的多功能工程机械，俗称“两头忙”。根据GB10186．88（挖掘装载机术语），挖掘装载机定义为：一种机体前部装有装载装置，机体后部装有反铲挖掘装置的自行式机械：作为反铲挖掘使用时，它是通过铲斗机械方向运动进行地平面以下的挖掘。作为装载机使用时，通过机体向前运动，装载斗进行装载或挖掘，并可提升、运料和卸料。由于挖掘装载机独特的构造及其集挖掘、装载、破碎和松土等功能于一身的特点，它被广泛应用于市政、建筑、油田、水利、林场、军事工程、公路养护等方面的工程施工。     

影响轿车换挡品质主要因素的分析与试验研究

开发了自动变速器电子控制系统的测试仿真台及电控单元，通过试验分析自动变速器控制系统影响轿车换挡品质的主要因素，即换挡过程中作用在结合元件上的油压突变及换挡电磁阀动作时间长短。指出，液力变矩器的闭锁控制也对换挡品质有一定的影响，对其进行深入研究町以更好的改善换挡品质。