排序方式: 共有172条查询结果,搜索用时 15 毫秒
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电力电子装置故障具有种类多、数量大和位置分布广的特点,需要进行在线诊断和维护.基于混合知识表达的在线维护专家系统,对整流装置运行状态进行监测和分析,对其各个设备、各环节进行维护和简单故障诊断.该系统用于某食盐水的电解大型整流电源上,获得良好的应用效果. 相似文献
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随着我国公路建设事业的不断发展,定额管理部门对公路工程定额数据收集和处理的要求也越来越高。以河南省定额数据收集为例,分析公路工程定额数据收集的现状和存在问题,探讨定额数据在线收集的关键技术,提出B/S和C/S模式相结合的定额数据在线收集系统的体系结构,给出定额数据在线收集系统的网络构造方案。 相似文献
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陈琳 《广东交通职业技术学院学报》2015,(1):50-54
为了免去广大机动车主窗口办理业务带来的不便之处,通过开发实施网上缴费系统提供便民服务,对已经登记过资料的非首次缴费机动车提供网上申报缴纳车船税功能,并提供发票打印功能;另外也为业务管理部门工作人员提供相关的后台统计管理工具,能够自动统计相关数据,呈现对应的统计报表。 相似文献
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为了从在线社会网络中识别关键用户,并对用户的关键性进行量化排序,提出URRank算法,通过模拟人类社会的投票行为,综合考虑用户自身的活跃度和用户间的关注与互动关系,经过迭代计算,量化用户的关键性.以新浪微博的部分抓取数据为例,通过比较现有几种关键用户排序算法发现,URRank算法能够避免其他算法存在的被欺骗及片面性问题,识别出具有高认知度和高覆盖度的关键用户. 相似文献
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Jacek Pawlak 《运输评论》2020,40(4):429-456
ABSTRACTTravel-based multitasking, also referred to as travel time use, is now a well-established concept, whose existence is supported by the technological trajectories, with mobile information and communication technologies (ICT) and vehicle automation working together to allow travel time to be more productive and enjoyable. Despite existence of reviews of travel-time multitasking studies, the systematic overview of the role digital activities, i.e. those that necessarily require modern ICT equipment to participate, has been limited, often wrapped under the umbrella term “use of ICT”, potentially obscuring their complexity and sophistication. Similarly, the role of connectivity and its attributes, e.g. speed (bandwidth), reliability, price, ease of use, data allowance or security, deserves a more systematic overview given its key role in enabling digital online activities and hence the travel-based multitasking options. This paper provides a review of 77 empirical travel-based multitasking-studies that explored the role of digital activities or connectivity. In particular, the review discusses the existing typologies of digital activities, dividing them into hardware-centric, function-centric or a combination of both (mixed). Subsequently, key contributions are discussed with respect to the treatment of digital activities and connectivity and its attributes. Based on the review, it is possible to observe that the existing studies have looked only at a handful of rather restricted online activities that do not sufficiently capture the sophistication with which individuals interact with the virtual world nowadays. Furthermore, the role of connectivity, although deeply embedded in the “C” of the “ICT” concept, has not been looked at or modelled in any detail in studies related to travel time use or its quality. This existing shortcoming might have resulted in an insufficient understanding of the mechanisms driving travel time use, the associated experience indicators of customer satisfaction, productivity or the consequences for relative attractiveness of transport modes. All of these considerations remain, however, crucial for designing, appraising and operating transport infrastructure and services that are able to take the advantage of lifestyle digitisation to meet the increasing customer needs while also delivering broader economic, social benefits and possibly also environmental benefits. 相似文献
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介绍了铁路货车检修工序进展监控与管理软件的设计.系统通过Web服务器的串口所连接的无线通信模块与现场的无线手持机通信.主机通过轮询方式查询手持机发送的作业进展信息,利用多线程协调完成通信信息的获取与分析.同时,系统采用B/S模式在浏览器页面能对检修工序进展进行实时监视.在Web服务器端,利用Spring任务定时实现每天工作的启停,以及用Spring编写REST风格的Web服务.在浏览器端,利用AJAX技术实现对Web服务的访问,以及将显示结果在页面上动态显示.Web服务通过Json变换向浏览器传递对象消息. 相似文献
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采用UML建模技术对系统进行了需求分析与设计,给出了系统的主要用例图、顺序图、状态图。系统基于B/S架构、采用MVC模式和JSP+Oracle数据库技术,实现了在线考试和在线进行模拟测试,极大的降低了教师的工作量和人工阅卷的出错率,提高了工作效率。 相似文献