海南气象影视广告营销及发展对策分析

针对海南气象影视广告业现状和存在问题,分析了海南气象影视广告媒体的优劣势,并提出了相应的解决方法和经营策略,从而推动气象影视广告业不断创新发展。     

GIS应用现状及发展趋势探讨

作者在文中简要介绍GIS一般功能的同时,综述了GIS的应用现状。在此基础上,讨论了传统GIS、分布式GIS（C／S）和WEB GIS系统的集成策略及其优缺点,指出WEB GIS系统集成将是GIS系统在21世纪的发展趋势。     

浅谈电视天气预报节目解说词的编写

目前,山西省的电视天气预报节目主持人大都不是气象专业人员,因此,解说词的编写质量高低就成了整个天气预报节目能否取得观众认可的一个重要因素。要编一份成功的解说词,不仅要及时掌握大量的实时气象信息,也要充分了解本地天气气候背景,还要学习积累气象科普、专业服务等多方面的知识,并运用娴熟的文学技巧,从通俗易懂的角度向观众朋友们传递方便实用的气象信息。     

Zonation of the main volcanic hazards (lava flows and ash fall) in Tenerife, Canary Islands. A proposal for a surveillance network

The island of Tenerife is volcanically complex, and its eruptive history predominantly reflects the processes and products of two different eruptive styles: (1) non-explosive effusions of basaltic lavas from fissure vents mostly aligned along two ridges; and (2) less frequent but explosive salic eruptions from central vents associated with the Las Cañadas volcanic edifice and associated summit caldera. We have taken into account this fundamental distinction to develop a volcanic-hazards zonation (for lava flows and ash fall only) that includes: definition of the principal hazards; identification of the areas that have higher probability of containing emission centres; and numerical modelling of the vulnerable areas to be affected by volcanic hazards. Not only does the volcanic-hazards zonation map provide emergency-management officials with an updated assessment of the volcanic hazards, but it also represents a starting point for the preparation of a volcanic risk map for Tenerife. Finally, the hazards-zonation map also furnishes the basis for the design of a proposed volcano surveillance network.     

茂名市遥测地震台网

介绍了茂名市遥测地震台网的建设过程、监测能力、台网性能以及操作运行系统。     

无人机实时视频与三维地理场景融合

针对无人机视频巡查时无法获取视频要素与周围场景地理要素的空间关系等问题,本文提出了一种无人机实时视频与三维地理场景融合方法。该方法通过设置路线站点获取无人机实时巡查视频,利用高分辨率倾斜摄影模型构建三维地理场景,将视频在三维地理场景中投影,构建视频投影参数规范和无人机数据传输模型,实现无人机实时视频与三维地理场景融合展示;对无人机实景融合的应用流程进行设计,并通过具体案例进行试验验证。试验结果表明,无人机实景融合具有良好的表达效果,视频与三维地理场景融合度高且视频画面变形较小。该方法将无人机视频应用扩展至三维空间,为视频要素赋予了空间参考。     

突发灾害监控与决策系统的设计与实现

现代社会,面对高危或人类无法到达的区域,如森林火场现场视查、地震灾情查看、城市等狭窄地段的高楼消防救灾、核辐射现场勘察检测等,基于无人机的无线通信系统,由于体积小和机动灵活,通过信息传感采集、视频现场捕捉,能安全、有效地获取现场灾情情况信息。然后数据通过中继传到后台,存入后台数据库。利用采集到的现场信息与Arc GIS Server发布的GIS相关服务,通过Arc GIS API for Flex对数据进行快速分析处理,使采集信息可视化,同时进行突发灾害模拟预测,准确定位事发地点,评价灾害影响范围,查找救援最短路径等。本文设计并实现了基于无人机突发灾害监控与决策系统,同时重点介绍系统的设计、组网的关键技术、视频压缩、基于GIS的数据处理与分析以及系统实现的功能。     

基于隐含语义相关性分析的视频语义检索

提出了隐含语义相关性分析的处理方法,对描述视频内容结构的视频文档矩阵进行奇异值分解和变换,可得到表达可视特征与语义间隐含相关性的关系矩阵,用于视频检索。分析和实验表明,所提出的方法能保留视频内容结构中核心的语义元素,消除冗余的相关性干扰,还能够通过矩阵降维减少计算量,改善视频语义内容检索的效果。     

无人艇载雷达视频无线传输技术研究

雷达视频数据量大,更新频率高,传输带宽占用量大.无人艇（USV）岸艇数据传输带宽有限,传输信息种类多、数量大.在无人艇使用过程中,雷达视频是岸基操作人员安全航行保障、交战对象搜索确认等不可或缺的支持信息,然而岸艇数据互通带宽资源的紧缺和雷达视频的大信息传输需求之间的矛盾必然存在.本文根据雷达探测成像原理,对雷达视频进行数字化表示,经压缩、数据传输和复原显示,实现无人艇岸基控制站对艇载雷达视频的还原显示.该技术在某型USV控制系统中的应用结果表明：视频压缩比高、处理时延低、视频还原完整、容错性好.     

Diffuse emission of CO2 from the Fossa crater,Vulcano Island (Italy)

 Numerous measurements of CO₂ degassing from the soil, carried out with the accumulation chamber method, indicate that in the period April–July 1995 the upper part of the Fossa cone released a total output of 200 t d^–1 of CO₂, which corresponds to approximately 1000 t d^–1 of steam. These large amounts of fluids are of the same order of magnitude as those released by the high temperature fumarolic field located inside the crater. The spatial distribution of soil gas fluxes shows that the main structures releasing CO₂ are the inner slopes of the crater and a NW–SE line, located NE of the crater rim, which correspond to the main direction of Vulcano Island active faults. The comparison of the φCO₂ maps with the soil temperature distribution, derived from both direct measurements and airborne infrared images, indicates the occurrence of extensive condensation of fumarolic steam within the upper part of the Fossa cone, whose total amount is comparable to the rainfall budget. Part of the condensate which originates from this process contributes to the recharge of the phreatic aquifer of Porto Plain, modifying the chemical and isotopic composition of the groundwater. Received: 1 September 1995 / Accepted: 8 January 1996