排序方式: 共有33条查询结果,搜索用时 15 毫秒
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城市多媒体电子地图系统探讨 总被引:2,自引:0,他引:2
为及时反映城市信息的多媒体电子地图融合了数字制图技术、GIS技术、多媒体技术等多种高科技手段,为政府部门、公司企业、社会公众构建了一套便捷的、可视化的空间信息服务平台。介绍了多媒体电子地图的一些特点和重要性,并对多媒体电子地图的制作方法和设计理念等方面进行了探讨。 相似文献
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多媒体数据挖掘是目前国际上数据库、多媒体技术和信息决策领域最前沿的研究方向之一,是数据挖掘的一个新兴且富有挑战性的子领域。介绍了多媒体数据挖掘的系统结构,及以图像数据为代表的关联规则挖掘方法。 相似文献
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分析了多媒体技术的应用现状及发展趋势。以昌平区地质灾害多媒体演示系统的制作为例,从制作流程、音视频文件处理等方面,详述了多媒体技术在地质灾害成果演示中的应用。同时,就制作过程中出现的问题,提出了相应的解决办法及建议。 相似文献
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H.-W. Ma 《Stochastic Environmental Research and Risk Assessment (SERRA)》2002,16(6):464-478
There exist many sites with contaminated groundwater because of inappropriate handling or disposal of hazardous materials
or wastes. Health risk assessment is an important tool to evaluate the potential environmental and health impacts of these
contaminated sites. It is also becoming an important basis for determining whether risk reduction is needed and what actions
should be initiated. However, in research related to groundwater risk assessment and management, consideration of multimedia
risk assessment and the separation of the uncertainty due to lack of knowledge and the variability due to natural heterogeneity
are rare. This study presents a multimedia risk assessment framework with the integration of multimedia transfer and multi-pathway
exposure of groundwater contaminants, and investigates whether multimedia risk assessment and the separation of uncertainty
and variability can provide a better basis for risk management decisions. The results of the case study show that a decision
based on multimedia risk assessment may differ from one based on risk resulting from groundwater only. In particular, the
transfer from groundwater to air imposes a health threat to some degree. By using a methodology that combines Monte Carlo
simulation, a rank correlation coefficient, and an explicit decision criterion to identify information important to the decision,
the results obtained when uncertainty and variability are separate differ from the ones without such separation. In particular,
when higher percentiles of uncertainty and variability distributions are considered, the method separating uncertainty and
variability identifies TCE concentration as the single most important input parameter, while the method that does not distinguish
the two identifies four input parameters as the important information that would influence a decision on risk reduction. 相似文献
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在多媒体CAI课件的设计开发中,需要用到大量的各种形式的图形图象资料作素。由于这些素材的特殊性及某些特定CAI课件制作工具(如Authorware35.Director等)对图形图象文件的特殊要求,以及图形图象资料少的原因,如何增加图形图象资料素材的数量,是本文的主要任务,现结合多媒体CAI课件制作过程中的实际经验,介绍截图软件Snagit32在多媒体CAI制作中进行图形图象收集的方法及技巧。 相似文献
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《地学前缘(英文版)》2022,13(4):101382
Super-heavy oil is a significant unconventional energy source, and more than 30 years of research have shown that steam-assisted gravity drainage (SAGD) technology is suitable for thick super-heavy oil reservoirs. Recently, more and more thin-layer super-heavy oil reservoirs have been discovered in China, while their deep buried depth and serous heterogeneity make the existing SAGD technology difficult to apply, so it is urgent to improve the existing SAGD technology for the thin-layer super-heavy oil. To this end, this paper focuses on the enlightenment of field application in SAGD technology. Firstly, based on typical SAGD field projects, the development history of SAGD technology in the world was reviewed, and the influence of reservoir physical properties on the application of SAGD technology in thin-layer super-heavy oil reservoirs was analyzed. Secondly, the well pattern, wellbore structure, pre-heating, artificial lift, and monitor technique of SAGD were detailed described, and their adjustment direction was expounded for the development of thin-layer super-heavy oil reservoirs. Lastly, the gas- and solvent-assistant SAGD were comprehensively evaluated, and their application potential in thin-layer super-heavy oil reservoirs was studied. The research results can provide theoretical guidance for the application of SAGD technology in thin-layer super-heavy oil reservoirs. 相似文献
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结合本院《动力地质学》学科多媒体教学软件设计及开展多媒体教学实践,对多媒体技术在教学实践中的应用方向及多媒体教学中的策略问题进行总结,以期多媒体技术在教学中的广泛运用对教学质量的提高,起到启迪作用。 相似文献