排序方式: 共有80条查询结果,搜索用时 15 毫秒
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本系统基于.NET平台,采用C#作为开发语言,对ArcEngine 9.3进行二次开发,融.NET平台的可移植性与ArcEngine 9.3的可视化和空间显示分析功能于一体,实现了溢油行为与归宿预测模块与GIS平台的统一。把溢油漂移的计算结果与地理信息系统等平台相结合,建立了渤海海域应急预测预警系统。也集成了环境敏感资源信息数据库、应急设备、队伍信息数据库和溢油漂移模型,为溢油应急提供溢油敏感资源及应急资源的日常管理,实现溢油漂移预测结果与敏感资源图的叠加耦合,达到对环境敏感资源的快速预警,形成了溢油敏感资源及应急资源管理系统。作为该系统研制中的第二部分,主要介绍了系统的可视化、系统的预报流程、系统案例验证以及业务化应用的研究工作。 相似文献
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The different impacts of El Ni?o during peak phases with and without a positive Indian Ocean Dipole (P-IOD) on the Northwest Pacific circulation were studied. The authors focused on the Northwest Pacific circulation features in the mature phase of El Ni?o from September to February of the next year. Composite maps and simulations demonstrate that the atmospheric circulation under the impact of El Ni?o with and without P-IOD exhibits large differences in temporal evolution and intensity. In single El Ni?o (SE) years without a P-IOD, an anomalous low-level anticyclonic circulation around the Philippines (PSAC) is instigated by the single El Ni?o-induced Indonesian subsidence. However, during the years when El Ni?o and a P-IOD matured simultaneously, a much greater anomalous subsidence over the western Pacific and the Maritime Continent occurred. The PSAC tends to occur earlier, is much stronger and has a longer lifetime than that during SE. More importantly, the PSAC shows a characteristic of an eastward movement from the southern South China Sea (SCS) to the Philippine Sea. This characteristic does not appear during SE. These patterns imply that a positive IOD event tends to exert a prominent influence on the PSAC during El Ni?o events and there is a combined impact of El Ni?o and P-IOD on the development of the PSAC. 相似文献
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无锈蚀锚索是探矿工艺研究所最近研制的一种新型非金属锚索.通过对国内外锚索索体、承压垫板、外锚具、附属零部件、张拉装置、锚索整体结构及锚索施工工艺的研究,以及两轮现场试验,结果表明无锈蚀锚索以其独特的性能,在特殊锚固环境中锚固,比钢锚索更有效、更可靠.因此具有极大的市场潜力. 相似文献
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预应力格构锚固结构受力特征模型试验研究 总被引:1,自引:1,他引:0
格构锚固是边(滑)坡工程常用的防治技术之一,为了研究格构锚固结构实际支挡碎石土边坡的受力特征,利用现场大比例尺物理模型试验,填筑粘土方式模拟滑坡体,设计相似比为1:2.5的格构梁,通过后缘加载模拟了格构锚固体系承载受力直至失稳破坏的全过程,监控格构梁后部土压力、格梁应力、格梁位移等参数,并分析了格构梁受力、位移特征和变形破坏模式。结果表明:格构边界处锚固点处变形较内部更为明显,跨梁呈"拱桥式"变形,最终在锚固点附近折断破坏;各横纵梁受力特征类同,梁交叉锚固点处应力集中,梁中部受力最小,应力呈近倒三角形分布;模型中锚固点受力和位移自顶到底呈现线性递减的应力分配现象。上述研究可以为工程优化设计提供一定参考。 相似文献
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