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ABSTRACTDemand for sea space brought about by increasing container-shipping traffic has important implications on how this space is managed and used. This is particularly important given the long-term nature, high-asset specificity, high- opportunity cost of investment, and significant economic impact of container port activity on a locality. The challenge is especially pressing for ports, which are facing constraints in seaside capacity where container traffic also has to co-exist with the needs of other types of ship traffic. This challenge is likely be multiplied for next generation container ports, which are expected to handle even larger traffic volumes. These ports are also likely to face competing sea space demands from other economic and social activities especially when they are concurrently major confluences of trade, logistics, and urban populations. This is the first research to investigate in detail the impact and importance of investigating sea space requirements from the perspective of cargo traffic composition and ship capacity. Results show that transshipment containers can generate much higher demand for sea space due to the higher volume of shipping capacity that accompanies such traffic. Sustainability issues and managerial and policy implications pertaining to the development of next generation container ports are provided. 相似文献
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试论防火墙技术在网络中的应用 总被引:4,自引:1,他引:3
黄河 《武汉理工大学学报(交通科学与工程版)》2001,25(1):60-62
防火墙是设置在被保护网络和外部网络之间的一道屏障,以防止发生不可预测的、潜在破坏性的侵入。它可通过监测、限制、更改跨越防火墙的数据流,尽可能地对外部屏蔽网络内部的信息、结构和运动状况,以此来实现网络的安全保护。文中着重讨论防火墙的工作原理,提出几种防火墙的实现方式。 相似文献
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介绍了软交换网与H.323 IP电话网之间的关系,以基于H.248协议的软交换网与基于H.323协议的IP电话网为例,阐述了两网互联互通时的相关测试内容及测试方法。 相似文献
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宽带接入日渐普及,尤其通过xDSL、CABLE MODEM将局域网接入并共享Internet,具有高带宽、低成本、易实现的诸多优点,已成为中小型企业、小区、网吧、SOHO的首选方案.介绍一种经济、实用和可靠的路由器、网关硬件接入与共享方法. 相似文献
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