筑路机械不解体检测与诊断

通过对发动机、液压系统、变速传动系统及电气控制系统的故障分析，较为详细地阐述了不解体检测与诊断的方法。     

液压挖掘机效能的模糊综合评判法

以液压挖掘机选型为例，建立了液压挖掘机综合效能评价模型，介绍了工程机械综合效能评价及选型的模糊综合评判法的具体应用。这种方法不仅全面考虑了代表机械性能的各种主要因素，而且兼顾了使用者的具体使用要求，方法灵活，简单可靠，是工程机械选型和性能评价的一个重要方法。     

台架模拟非道路移动机械车载法排放试验的方法研究

为了缩短非道路移动机械车载法排放测试的开发周期,本文提出了一种相对简单高效的方法.通过采集非道路移动机械一段时间内的实际作业工况,将其转化为满足标准要求的一组转速和扭矩值,根据这组数据在发动机台架上编制自动循环程序来模拟非道路移动机械实际作业过程中的发动机工况,同时测量该过程中排气污染物,可以计算得到发动机台架模拟的车...     

刚构一连续组合单箱室桥剪力滞效应分析

为了分析刚构一连续组合单箱室桥的剪力滞效应,以三股线刚构一连续组合桥为工程背景,利用空间有限元程序ANSYS建立箱梁空间网格模型,通过模型对剪力滞效应进行分析,最终得出空间网格法可以很好地分析刚构一连续单箱梁桥的成桥跨中、支点剪力滞效应;箱梁的剪力滞效应为：顶板的剪力滞效应较底扳显著;剪力滞效应沿纵向是变化的,总体上边跨截面的剪力滞比跨中截面要突出,相关结论可为同类桥梁的设计和加固提供参考。     

The influence of integrated space–transport development strategies on air pollution in urban areas

The phenomenon of urban sprawl has strong impacts on transport performance and accessibility and causes an increase of air pollution. Effective control of urban sprawl requires an integrated approach comprising urban transport and land-use planning. Current research is insufficient to demonstrate the effects of urban sprawl on travel behavior and air pollution emission. The present paper examines the potential of an integrated approach on space–transport development strategies with the aim of increasing accessibility and reducing air pollution. A combination of space and transport strategies has been simulated for the rapidly expanding city of Surabaya. A comparative analysis of the impact of those cases indicates the promising potential alternatives to minimize the phenomenon. The transport options considered are combinations of Public Transport (PT), comprising Mass Rapid Transit (MRT), Light Rapid Transit (LRT), and Bus Rapid Transit (BRT). The options for urban structure include a compact zone development for the city, as formulated by the city planning agency, and a polycentric city set-up based on a job-housing balance aimed at minimizing the house-job distance. The results indicate that the polycentric city structure has the potential to make public transport work successfully for the city of Surabaya. This city structure creates a trip demand pattern which matches citizens’ PT preferences. Compared to the current situation, the combination of such a city structure with an expansion of PT systems would lead to a considerable improvement of transport performance, i.e. a PT mode share, a mean commute distance, and a significant reduction in emissions.     

Potential-based dynamic pedestrian flow assignment

This study proposes a potential-based dynamic pedestrian flow assignment model to optimize the evacuation time needed for all pedestrians to leave an indoor or outdoor area with internal obstacles and multiple exits, e.g., railway station, air terminal, plaza, and park. In the model, the dynamic loading of pedestrian flows on a two-dimensional space is formulated by a cell transmission model, the movement of crowds is driven by space potential, and the optimization of evacuation time is solved by a proportional swapping process. In this way, the proposed model can be applied to not only efficiently optimize the evacuation process of a crowd with large scale but also recognize local congestion dynamics during crowd evacuation. Finally, a set of numerical examples are presented to show the proposed model’s effectiveness for optimizing crowd evacuation process and its application to design a class of variable guide sign systems.     

地铁站中的空间情节

地铁站作为运输线的一个空间节点,是提供旅客换乘和候车的一种静态设施,也是乘客在地铁线路上最能直接接触到的建筑空间。本文研究总结了地铁站空间情节的性质和类型,将地铁车站建筑的空间情节划分为四个阶段,并在此基础上阐释了营造良好地铁空间情节的意义及其方法。     

筑养路机械状态监测技术应用的研究

通过对筑养路机械利用振动监测技术、油质分析技术的状态监测技术应用的研究 ,建立一套以“定期监测 ,强制维护 ,视情修理”的现代化筑养路机械维修管理体制     

公路机械设备折旧办法探析

机械设备折旧是机械设备经济管理工作中的重要组成部分。本文通过对现行公路机械设备折旧办法的分析,提出了改进公路机械设备折旧办法的设想,并指出了机械设备折旧工作中需要注意解决的一些问题。     

通用机械系统运动学／动力学分析微机软件MGMKDS的研制与应用

本文阐述了一种在微型计算机上运行的通用机械系统运动学/动力学分析软件MGMKDS的理论依据、算法、基本功能及工程应用实例。