汽车远程故障诊断平台的开发设计

文章根据汽车故障诊断研究发展方向,结合车辆常见电器类故障特点,同时考虑到现阶段车辆网络安全的要求,设计了具有可靠性高、易于操作、普适的汽车远程故障诊断平台,使得整车厂工程师或电器模块供应商通过远程诊断的方式,准确发现车辆电器类故障的原因。同时,对远程诊断技术的发展进行了展望。     

问题式教学在《汽车构造》网络授课中的实践应用

文章通过对问题式教学的理论分析,结合疫情期间开展网络授课的教学过程,通过理论分析和实践教学来探索问题式教学在网络教学过程中的开展方式,以此构建基于网络教学“生成问题、回答问题、解决问题和检验问题”的问题式教学模式,从而提高网络授课的教学效果,培养学生自主学习的能力。     

中国铁路管理信息系统的结构分析

在对我国铁路各主要职能部门管理信息系统的信息交流关系定性分析的基础上,运用总体结构等级分析法明确各管理信息系统的地位和相互关系,提出铁路管理信息系统集成应该以具有强关联的运输管理信息系统为核心,以安全、财会管理信息系统为引导,抓住重点,运用基层运输管理信息系统的推动作用和上层安全、财会管理信息系统的拉动作用加快铁路信息化的发展.     

SOA在海战场综合电子信息系统中应用的构想

分析了海战场综合电子信息系统新的发展需求,提出了采用面向服务软件体系结构开发海战场综合电子信息系统软件的思想,并对之进行了分析比较,最后给出了海战场综合电子信息系统体系结构向SOA迁移的策略。     

灰空间的建筑生态相关问题的探讨

从建筑生态的全新视角,拓展了灰空间的基本概念,并将注重生态的建筑灰空间分为功能性灰空间、附属性灰空间、技艺性灰空间3种类型,同时提出与之相对应的合院空间、飘浮空间、双层表皮等多种灰空间生态化的创作手法。     

转换层位置对高层建筑结构地震反应影响的研究

介绍了转换层结构的概念及国内外对转换层结构位置的研究现状,阐述了转换层结构分析的两种方法:振型分解反应谱法和动力时程分析法,运用这两种方法举例分析了转换层位置对结构自振周期、振型、地震反应力及分布等地震反应的影响,最后提出应按照规范要求限制转换层的设置高度,并适当加强转换层上下一至两层竖向构件的截面及配筋设计的建议。     

智慧出行MaaS大数据云平台体系架构和实践

介绍八维通科技有限公司已建的智慧出行数字票务服务平台的体系架构,并创新推出在交通出行大互通大覆盖需求下的智慧出行MaaS大数据云平台的构架设计。智慧出行MaaS大数据云平台采用企业运营数据中台的模式构架,以标准化采集为基础、开放架构为抓手、数据总线为主线,标准化的数据为基石、TT大脑为指挥中枢,安全可靠的支付服务为宗旨。云平台构架着重将差异化的需求进行共性化抽象,实现差异化的服务内容和不同支付方式接入时进行统一规范的运营支撑。目前,云平台构架和功能已在近20个城市上线运营和商用,验证了云平台构架的合理性和可靠性。     

海底混响非瑞利特性研究及神经网络应用

基于单元散射理论介绍了瑞利分布模型和K分布模型,通过计算混响偏度和峰度判断出海底混响偏离瑞利分布模型,并利用CW信号、LFM信号的试验混响数据进行阵元域、波束域上的PDF曲线拟合。结果表明,海底混响的统计特性更趋向于K分布模型。利用BP网络方法和海底混响、点目标仿真信号的PDF特性进行了目标识别验证,其正确识别率达到了92%以上,且计算量大大降低。     

A new generalized travel cost based connectivity metric applied to Scandinavian airports

This article proposes a new, generalized travel cost based method to operationalize network accessibility provided by airports. The approach is novel as it integrates features of network topology with multiple quality aspects of scheduled air transport services into one metric. The method estimates generalized travel costs for the full set of feasible travel paths between an airport and all network destinations. Rooftop modeling accounts for schedule delay and isolates the most cost-efficient travel paths per O-D relation. Respecting the assumed arrival time preference of passengers and adjusting for destination importance, connectivity scores are derived. The method is then applied to explore changes in the global connectivity pattern of Scandinavian airports from 2004 to 2018. The results suggest distinct spatial differences throughout the network, but less pronounced in size than suggested by popularly applied connectivity measures. Findings also highlight the importance of the geographical location as a determinate of an airport’s connectivity.     

Electric vehicle charging station locations: Elastic demand,station congestion,and network equilibrium

Battery-only electric vehicles (BEVs) generally offer better air quality through lowered emissions, along with energy savings and security. The issue of long-duration battery charging makes charging-station placement and design key for BEV adoption rates. This work uses genetic algorithms to identify profit-maximizing station placement and design details, with applications that reflect the costs of installing, operating, and maintaining service equipment, including land acquisition. Fast electric vehicle charging stations (EVCSs) are placed across a congested city's network subject to stochastic demand for charging under a user-equilibrium traffic assignment. BEV users’ station choices consider endogenously determined travel times and on-site charging queues. The model allows for congested-travel and congested-station feedback into travelers’ route choices under elastic demand and BEV owners’ station choices, as well as charging price elasticity for BEV charging users.Boston-network results suggest that EVCSs should locate mostly along major highways, which may be a common finding for other metro settings. If 10% of current EV owners seek to charge en route, a user fee of $6 for a 30-min charging session is not enough for station profitability under a 5-year time horizon in this region. However, $10 per BEV charging delivers a 5-year profit of $0.82 million, and 11 cords across 3 stations are enough to accommodate a near-term charging demand in this Boston-area application. Shorter charging sessions, higher fees, and/or allowing for more cords per site also increase profits generally, everything else constant. Power-grid and station upgrades should keep pace with demand, to maximize profits over time, and avoid on-site congestion.