排序方式: 共有94条查询结果,搜索用时 250 毫秒
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于龙 《铁路通信信号工程技术》2007,4(6):3-6
本文阐述了京津客运专线CTC系统的结构、功能、处理流程及接1:2等。该系统实现了Siemens协议、铁道部标准协议以及其他协议间的相互转换,完成京津客运专线系统数据转入输出平台的功能。 相似文献
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空间分析方法在航线设计和航路监视中的应用 总被引:3,自引:0,他引:3
探讨在电子海图中,使用GIS空间分析函数自动判断计划航线的偏航极限范围内是否存在危险点、线、面的方法,为航线设计起决策参考,在航行过程中,起实时航路监视作用。 相似文献
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研究比选城轨公务电话系统典型构建方案,提出将基于软交换的VoIP技术应用在城轨公务电话领域,对该技术在城轨公务电话系统中应用的可行性及具体的构建方案展开深入研究。 相似文献
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VoIP技术广泛应用,造成电信运营商话费收入减少,特别是国际长途话费,应该通过技术手段控制虚拟VoIP电话系统。为此,分析VoIP话务的媒体特征和信令特征,取得相应的通话信息,为限制提供参考信息,基于这个信息可以从媒体和信令的角度对VoIP电话进行控制。 相似文献
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介绍了ATC(列车自动控制)系统的功能以及ATC系统维护的现状,探讨了一种ATC系统的智能诊断维护实现方案以及对轨道交通信号设备维护带来的便利和优势。 相似文献
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Hassan A. Karimi 《智能交通系统杂志
》2014,18(3):286-298
》2014,18(3):286-298
The positioning quality of global navigation satellite system (GNSS), or GNSS quality of service (QoS), is a major factor impacting real-time navigation performance. Commonly requested routes (i.e., shortest or fastest) may include areas with poor GNSS QoS, which can subsequently degrade navigation performance. To provide alternative routes with high or acceptable GNSS QoS along a route, a novel optimal routing for navigation systems/services based on GNSS QoS by utilizing integrated GNSS (iGNSS) QoS prediction is presented in this article. New routing criteria based on GNSS QoS are maximum availability, maximum accuracy, maximum continuity, and maximum reliability. Two experiments were conducted to compare GNSS QoS-based routes against shortest routes. In one experiment, routes were simulated, and in another, generated routes based on GNSS QoS were evaluated against GPS-based trajectories as ground truths. The results show that GNSS QoS-based routes provide routes with higher QoS, more than 50%, and longer, about 50%, than shortest routes. 相似文献