后桥双轮驱动摊铺机附着性能分析

以ＬＴＹ８型摊铺机为例，介绍了一种典型的摊铺机后桥双轮驱动方式，并分析了其良好的附着性能及避免产生寄生功率的问题。     

纯扫式扫路车的技术改进及实用效果

通过对纯扫式扫路车普遍存在的清扫效果差、二次污染大等缺陷的分析，提出以直立双筒滚刷清扫机构替代单滚刷机构的技术改进方案，并就其功率消耗及效益进行了分析     

耙吸挖泥船的动力装置选型及综合评估

以6 500 m~3耙吸式挖泥船的动力装置为研究对象,对其配置方案的合理性进行分析,并进行动力系统配置方案选择、主机选型和能力校核计算。结合船舶设计任务书的要求,逐步分析目标船的整体性能和各工况下的功率需求。在此基础上,粗略估算目标船设备在各主要工况下的功率需求,并提出几种能满足各工况下功率需求的动力系统配置方案。根据目标船的工作特点,对各动力系统配置方案的适用性进行初步分析,采用层次分析法进行模糊评判,经过评估确定各评价指标的权重;通过对不同指标进行打分来确定隶属度并进行模糊运算,根据最大隶属度原则选出最适合目标船的动力配置方案;同时,根据最优配置方案选取的主机型号对目标船进行功率验证。计算分析结果表明,该研究方案满足目标船的设计要求,说明选用的研究模型和评价方法合理。     

浅谈声屏障设计与计算的技术关键

声屏障设计与计算技术关键包括:声屏障立柱截面抗弯验算、声屏障立柱与底板焊缝强度验算与声屏障立柱长度计算等六部分。通过杭州湾跨海大桥连接线声屏障设计与计算的实例,能为类似工程提供技术参考。     

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电力工业是国民经济发展的最重要的基础能源产业,做好电力物流和供应链的管理在电力产业中具有重要意义。本文简要介绍了电力物流以及电力供应链的基本概念,分析了电力供应链的特点及传统电力供应链管理模式的问题,结合现代供应链管理的方法与观念探讨了电力供应链管理方法的改革设想。     

轴承刚度及间距对水下结构声振特性影响研究

为掌握轴承刚度及间距对水下结构振动声辐射的影响,本文建立了桨-轴-壳体简化模型,利用三维水弹性力学理论和三维水弹性声学分析软件,分析了不同轴承刚度及间距下壳体结构的声源级曲线。结果表明：轴承刚度越大,水下结构的辐射总声级越大;螺旋桨横向力激励下艉后轴承刚度对水下结构声辐射影响最大,艉前轴承次之,推力轴承影响最小;轴承间距变化对水下结构的声辐射影响不大,但容易改变推进轴系的振动状态。     

混合动力电动汽车电池在线监控系统的设计及应用

在HEV和动力镍氢电池试验研究的基础上,开发了HEV动力电池在线监测与控制系统。该系统以单片机为核心,可有效地实时监测动力电池的各种运行参数：电池SOC、总电压、电池包内特征点温度、充放电电流;判断电池的状况及故障诊断;具有CAN通信和故障报警功能,系统运行稳定、可靠。     

Competing for level of service in the provision of mobility services: Concepts, processes and measures

One of the most striking problems societies currently deal with is to assure adequate quality standards while improving accessibility within and between cities. In addition there is also a growing awareness that, to achieve a sustainable balance between private and public means of mobility, policies have to be able to send the correct signals in order to induce users adaptive behaviour, which in turn will provide the system with a reliable feedback on the needs for further investment and expansion of transport facilities. The definition and measurement of quality of service of the transport system is thus an objective aimed by both users and producers and it is often represented by the rather holistic concept of Level of Service (LoS). However, the LoS concept is not consciously used by users, on the contrary the user concentrates her comparative evaluation on what is simply known as quality. It is the planner that translates planned quality into LoS concept. So, LoS is a concept at the interface between the provider and the user. Given the interface character of the LoS concept an accounting framework for LoS should thus take into account the need to segregate the evaluation for passengers and freight transport and also distinguish between types of travellers in the case of passenger transport and types of commodities or logistic families in the case of freight transport. Moreover the bridge between the planner and the user view must be ensured. This paper reports the results of a research work dedicated to this topic.     

浮船坞电气设计的探讨

本文简要介绍了浮船坞新规范出台后对电气设计的新要求,对电站负荷计算及主要电气设备选用提出了一些设计探讨。     

键合图理论在汽车动力总成液力悬置系统建模与仿真中的应用

本文在介绍键合图理论的基本原理和特点的基础上,重点阐述了键合图方法如何应用于汽车动力总成液力悬置系统的建模与仿真。