共查询到19条相似文献,搜索用时 125 毫秒
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局域网计算机终端作为计算机管理的一大重要内容,运用一些先进的管理控制手段,可以对所使用的计算机实行有效的监督管理的工作。本文将立足局域网计算机终端控制的重要性,积极构建局域网计算机的有效控制,同时运用局域网的终端控制,对网内的计算机实施有效及时的监控或者获取有效地计算机信息,以此为基础促进局域网计算机的安全以及相关功能的有效运行。 相似文献
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随着读者对图书馆网络需求的急剧增加,图书馆原有的有线网络端口已严重不足,而无线局域网(WLAN)以其独特的优点解决了这一难题。文章主要分析了无线局域网组建的几个方面。 相似文献
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当今社会,高铁建设的快速发展,民航,公路这种交通方式与其的竞争愈演愈烈。为了提升整个高铁建设的竞争力,高铁运营方不仅要对客运市场进行合理积极的调查,获得及时有深度的市场信息,还要根据旅客的需求,制定出相应的差异化营销策略,从而使高铁事业不断高速前进。 相似文献
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安全问题始终是计算机网络的软肋,一直制约着计算机网络技术的进一步推广。随着Internet网络急剧扩大和计算机局域网用户迅速增加,以及人们缺乏对网络安全控制机制和安全政策认识的不足,网络安全将变得更加严重和复杂,而这些风险正是影响人们致力于解决计算机局域网的安全问题所在。本文通过对计算机局域网安全的描述,阐述了计算机局域网络系统在运用中存在脆弱性的一面。并就局域网安全保密措施进行了相应的探讨。 相似文献
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This paper presents an alternative approach for analyzing the relationship between land use and traffic congestion by employing the Macroscopic Fundamental Diagram (MFD). The MFD is an empirically observed relationship between traffic flow and traffic density at the level of an urban region, including hypercongestion, where flow decreases as density increases. This approach is consistent with the physics of traffic and allows the parsimonious modeling of intra-day traffic dynamics and their connection with city size, land use and network characteristics. The MFD can accurately measure the inefficiency of land and network resource allocation due to hypercongestion, in contrast with existing models of congestion. The findings reinforce the ‘compact city’ hypothesis, by favoring a larger mixed-use core area with greater zone width, block density and number of lanes, compared to the peripheral area. They also suggest a new set of policies, including the optimization of perimeter controls and the fraction of land for transport, which constitute robust second-best optimal strategies that can further reduce congestion externalities. 相似文献
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以路网总行程时间最小为目标,建立了城市交通流诱导与控制的协同模型,并基于蚁群算法对求解流程进行了设计,最后,应用此方法对小型路网进行仿真实验,通过实验前后对比,表明此方法能有效减少路网总行程时间。 相似文献
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针对城市路网交通流分布不均引起的交通拥堵问题,提出了在预约出行交通背景下基于预知OD的交通流路径优化方法。首先,分析了预约出行交通背景下预知OD的数据环境;其次,根据动态用户均衡准则,对预知的OD进行流量分配,给出预约出行车辆的路径;接着,使用预测控制的方法,结合路网上预约车辆的状态,以路网上路段的饱和度和未预约车辆的行程时间最小化为目标,从系统和用户两个角度对未预约车辆的路径进行实时的诱导,通过连续时域的滚动优化控制,优化交通流的路径;最后,对本方法的实现和应用做了思考和探索,对本研究做了总结。 相似文献
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Martin Cassini 《Economic Affairs》2006,26(4):75-78
Although widely accepted, traffic controls are an unnecessary evil, imposed on a road network by governments with no commercial incentive to ensure the free flow of traffic. Far from making our roads safer and less congested, traffic lights make matters worse. They take our eyes off the road, obstruct our progress and cause needless delay. In the process they damage our health, the economy and the environment. There is another way: remove controls and restore the common law principle of first-come, first-served – or 'filter-in-turn', as it's known in the Channel Islands. The optimum form of traffic control is self-control. The onus should be on government to prove otherwise. 相似文献
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网络安全在企业信息化中的位置越来越重要,越来越多的网络和系统需要防火墙设备进行安全防护。防火墙设备上的安全策略部署质量的高低,是防火墙设备是否起到安全防护作用的关键。但对于企业网络中众多复杂的各种应用,其数据流向往往比较复杂。本文针对企业网防火墙策略发现问题,提出一种采用网络设备日志分析实现识别业务流的方法,该方法可以低成本、高效率的发现网络中的业务流,进而为防火墙策略的部署提供依据。 相似文献
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广佛环线属于轨道交通网络中圈层的几何范畴,为广佛都市圈的城际环线。该线连接了广佛地区重要的交通枢纽,并与珠三角地区城际轨道交通线网规划中8条城际轨道交通线路衔接,是珠三角地区城际轨道交通网"三环"中最为重要的"一环"。通过对广佛环线功能定位分析和通达性计算表明:该线不仅满足了沿线地区客流需求,推动了广佛同城化进程,同时还将以广州为中心的放射形线路紧密的组合在一起,提高了珠三角地区城际轨道交通线网的通达性,提升了线网服务效率。 相似文献
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Many cities are considering introducing or expanding rail service in an effort to diversify their modal splits. Park-and-rides are integral to this strategy because they represent private auto users’ access points to the system. Proper placement of such facilities is a strategic location decision, as it can conceivably decrease vehicular traffic on congested roadways while benefiting users. This paper models the decision to locate park-and-ride facilities in a network flow-based framework. From this perspective, optimal placement occurs at locations where vehicles will encounter facilities early during their journeys to a centralized area or major activity center. Locating park-and-rides in this fashion maximizes the chances of removing users from the network. These elements are demonstrated in three hypothetical placement scenarios that make use of synthetic network and traffic flow data. Results illustrate the functionality of our approach for identifying park-and-ride candidate locations. Lastly, implications of our work are discussed in light of broader planning concerns and practical demands on rail facility location. 相似文献