混合动力电动汽车的结构分析

混合动力电动汽车根据动力系统组成可分为三种基本类型：分析了三种基本结构类型的组成和驱动模式，指出了各自的适用场合及其特点。     

遥感影像在电子地图生产中的应用

以SPOT、TM遥感影像为主要数据源 ,介绍了多源遥感影像融合技术以及电子地图的生产技术流程     

POLO轿车ABS的故障诊断及检修

POLO轿车Mark60防抱死制动系统主要由车轮速度传感器、制动压力调节器、电磁阀以及控制单元ECU组成。说明了该系统的工作原理及使用V．A．G1551诊断仪、ABS指示灯诊断故障的方法及车轮速度传感器、线束与连接器、制动压力调节器等部件的检修方法。     

漕俞路淀浦河大桥施工控制

淀浦河大桥是一座主跨 75m的连续箱梁桥 ,采用挂篮对称悬臂浇注。该文介绍了该桥施工控制的目的和内容、工作方法、结构分析及监测内容和成果。     

高速公路填方路基施工的探讨

高速公路填方路堤施工必须从基底处理,填料选择、压实、排水、防护等方面加以重视,依靠科技进步,采用新技术、新材料、新的检测手段,从而保证路基的稳定性和耐久性,进一步提高公路路基施工的总体质量水平,充分发挥投资效益和社会效益。     

The Influences of the Built Environment and Residential Self-Selection on Pedestrian Behavior: Evidence from Austin, TX

Pedestrian travel offers a wide range of benefits to both individuals and society. Planners and public health officials alike have been promoting policies that improve the quality of the built environment for pedestrians: mixed land uses, interconnected street networks, sidewalks and other facilities. Whether such policies will prove effective remains open to debate. Two issues in particular need further attention. First, the impact of the built environment on pedestrian behavior may depend on the purpose of the trip, whether for utilitarian or recreational purposes. Second, the connection between the built environment and pedestrian behavior may be more a matter of residential location choice than of travel choice. This study aims to provide new evidence on both questions. Using 1368 respondents to a 1995 survey conducted in six neighborhoods in Austin, TX, two separate negative binomial models were estimated for the frequencies of strolling trips and pedestrian shopping trips within neighborhoods. We found that although residential self-selection impacts both types of trips, it is the most important factor explaining walking to a destination (i.e. for shopping). After accounting for self-selection, neighborhood characteristics (especially perceptions of these characteristics) impact strolling frequency, while characteristics of local commercial areas are important in facilitating shopping trips.     

单片机控制的自动找零系统的设计

自动找零机系统为国内首创产品,作者首先介绍自动找零机系统的几种基本构件,然后给出基于单片机AT89C51来实现自动找零系统的总体设计.     

530TEU集装箱船的轴系设计

轴系是船舶动力装置的重要组成部分之一,轴系工作状态欠佳将引起主机油耗增加,工况恶化,甚至会导致船舶振动,影响船舶的正常航行。轴系的结构种类很多,目前我国海洋船舶广泛采用的是常规螺旋桨推进装置轴系,即尾机型,采用固定螺距螺旋桨。中纵布置的单轴系。下面以530TEU集装箱船的轴系设计为例,对此种轴系的设计作一简要介绍。     

广东地区两条旧水泥混凝土路面的改扩建设计与施工

通过采用落锤式弯沉仪和雷达检测设备,对莞龙、东深公路旧水泥混凝土路面的调查、检测结果,根据不同路段路况,采用不同改建方案,介绍了改建方案设计与施工经验。     

浅谈内河技术船员档案管理

船员技术档案反映船员完整的水上资历、业务技术水平、教育培训情况和适应能力。阐述了加强和规范内河技术船员档案管理的几点建议。