排序方式: 共有74条查询结果,搜索用时 15 毫秒
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介绍Parallel Sysplex环境的功能和特点,以及TMIS中央主机系统环境建立的方案,如何对3台主机的系统资源进行分配和实施的过程. 相似文献
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A probabilistic framework for weather-based rerouting and delay estimations within an Airspace Planning model 总被引:1,自引:0,他引:1
Michael V. McCrea Hanif D. Sherali Antonio A. Trani 《Transportation Research Part C: Emerging Technologies》2008,16(4):410-431
In this paper, we develop a novel severe weather-modeling paradigm to be applied within the context of a large-scale Airspace Planning and collaborative decision-making model in order to reroute flights with respect to a specified probability threshold of encountering severe weather, subject to collision safety, airline equity, and sector workload considerations. This approach serves as an alternative to the current practice adopted by the Federal Aviation Administration (FAA) of adjusting flight routes in accordance with the guidelines specified in the National Playbook. Our innovative contributions in this paper include (a) the concept of “Probability-Nets” and the development of discretized representations of various weather phenomena that affect aviation operations; (b) the integration of readily accessible severe weather probabilities from existing weather forecast data provided by the National Weather Service; (c) the generation of flight plans that circumvent severe weather phenomena with specified probability threshold levels, and (d) a probabilistic delay assessment methodology for evaluating planned flight routes that might encounter potentially disruptive weather along its trajectory. Additionally, we conduct an economic benefit analysis using a k-means clustering mechanism in concert with our delay assessment methodology in order to evaluate delay costs and system disruptions associated with variations in probability-net refinement-based information. Computational results and insights are presented based on flight test cases derived from the Enhanced Traffic Management System data provided by the FAA and using weather scenarios derived from the Model Output Statistics forecast data provided by the National Weather Service. 相似文献
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在水深测量监理的工作中,水深数据的处理是工作的难点。文章通过对常用的水深测量导航软件"中海达海洋测量导航软件"的数据处理方法研究,开发出了该常用导航软件的数据处理方法程序,解决了水深测量监理中的关键难点。 相似文献
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West and Central Africa ports have historically not paid much attention to environmental issues. In the past decade, however, environmental concerns are beginning to emerge with pockets of innovative responses to environmental risks as the ports undergo institutional and infrastructural reform – most notably, with concessions to multinational terminal operators. In this article, environmental management processes in the ports of Abidjan (Ivory Coast), Douala (Cameroon), Lagos (Nigeria) and Tema (Ghana) are compared. Three aspects of ecological modernization theory: changing role of the state, growing involvement of economic actors and economic incentives, and shifting roles for civil society organizations are focused on to analyse the dynamics of their environmental reform. Findings suggest that globalization processes are a common major trigger in enhancing a gradual but still fragmented and limited process of environmental reform in West and Central Africa ports, but paces and pathways of the reform are influenced by national politico-administrative arrangements rooted in colonial legacies. Consequently, understanding and advancing environmental reform processes of West and Central Africa ports requires following trends and significant developments but also taking into account national historical trajectories. 相似文献
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岳旭华 《铁路工程造价管理》2009,24(4):26-28,49
山西中南部通道是一条即将开工建设的大能力铁路对外通道,其在长治铁路地区的引入方案是全线的重点和难点问题之一。此文根据长治地区的既有概况、车流特点、工程地质条件,对长治地区的引入方案进行多方案比选,并对工程的经济性、可实施性、运输组织的合理性以及与城市规划的协调性等方面进行综合分析和论证,提出推荐意见。 相似文献
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