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地震应急视频会议系统是应急指挥技术系统的重要组成部分,是开展地震应急处置的重要支撑手段.北京地震应急视频会议系统由传统的硬件视频会议组成,经过多年的运转和使用,硬件设备问题和局限性凸显.云视频会议作为一种新兴视频会议技术,在调配灵活性、兼容性和资源利用率方面有明显优势.文章围绕云视频会议和硬件视频会议系统的融合应用展开研究,实现了远程培训、远程参会、地震应急现场通讯演练、会议监控等多功能应用场景.实践表明,该融合应用是提高地震应急视频会议系统能力的有效手段. 相似文献
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全国地震应急视频会议系统建设及应用 总被引:4,自引:2,他引:2
地震应急体系随着国家"十五"重大项目"中国数字地震观测网络"项目的验收初步确立,应急指挥系统建设逐步完善,视频会议系统在地震应急响应中发挥了日益重要的作用。本文简要介绍了视频会议系统的基本组成和关键技术,详细阐述了全国地震应急视频会议系统的网络拓扑结构、主要功能以及在地震应急中的实际应用情况。本文对将来地震应急视频会议应用模式的流程化、规范化有一定实际意义。 相似文献
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应急管理部多层级视频会议系统跨网段转发技术 总被引:2,自引:1,他引:1
介绍应急管理部视频会议系统接入地震系统的基本情况,结合地震应急视频会议系统应用现状,分析多层级跨网视频会议系统的架构特点,着重分析跨网段"背靠背"转发优化技术方案在视频会议系统融合中的实现与应用,以期为类似的应用场景提供参考。 相似文献
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提出了基于RouterOS路由系统的地震应急现场3G一体化组网方案,利用3G通信技术的优势,实现了前方地震应急现场和后方地震应急指挥中心的视频会议、IP电话等业务应用。3G网络是当前地震应急通信模式的补充。 相似文献
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《地震地质》2020,(3)
震后各类应急图件可为有效开展应急指挥与救援提供参考和依据,地震应急制图具有快速性、动态性、表现方法多样等特点。文中引入受众理论,系统研究了地震应急制图的对象及制图内容,将地震应急制图对象划分为地震应急指挥决策人员、辅助决策技术人员、应急救援人员和普通公众,论述了不同受众对地震应急图件的需求及这些图件的表达方法,并在此基础上研究了基于地震应急制图模板匹配的快速制图方法。该方法在震前根据不同受众需求,设计不同的地震应急制图模板及对应的数据库结构,震后在GIS与专业模型的支持下,根据灾情信息动态更新制图模板,实现快速地震应急制图。文中设计了地震应急制图模板库体系,包括制图对象层、地图模板层、模板图层和具体地图元素层等及相应的地震应急制图通用模板。最后,应用ArcEngine开发了地震应急制图系统,通过案例展示了系统的制图应用,可为震后快速、系统地生成各类地震应急图件提供支撑。 相似文献
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Accurate and reliable methods for quantifying grain size are important for river science, management and in various other sedimentological settings. Remote sensing offers methods of quantifying grain size, typically providing; (a) coarse outputs (c. 1 m) at the catchment scale where individual grains are at subpixel level, or; (b) fine resolution outputs (c. 1 mm) at the patch scale. Recently, approaches using unmanned aerial vehicles (UAVs) have started to fill the gap between these scales, providing hyperspatial resolution data (< 10 cm) over reaches a few hundred metres in length, where individual grains are at suprapixel level. This ‘mesoscale’ is critical to habitat assessments. Most existing UAV‐based approaches use two‐dimensional (2D) textural variables to predict grain size. Validation of results is largely absent however, despite significant differences in platform stability and image quality obtained by manned aircraft versus UAVs. Here, we provide the first quantitative assessment of the accuracy and precision of grain size estimates produced from a 2D image texture approach. Furthermore, we present a new method which predicts subaerial gravel size using three‐dimensional (3D) topographic data derived from UAV imagery. Data is collected from a small gravel‐bed river in Cumbria, UK. Results indicate that our new topographic method gives more accurate measures of grain size (mean residual error ‐0.0001 m). Better results for the image texture method may be precluded by our choice of texture measure, the scale of analysis or the effects of image blur resulting from an inadequate camera gimbal. We suggest that at our scale of assessment, grain size is more strongly related to 3D variation in elevation than to the 2D textural patterns expressed within the imagery. With on‐going improvements, our novel method has potential as the first grain size quantification approach where a trade‐off between coverage and resolution is not necessary or inherent. Copyright © 2017 John Wiley & Sons, Ltd. 相似文献
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Özcan Bektaş Dhananjay Ravat Aydin Büyüksaraç Funda Bilim Abdullah Ateş 《Pure and Applied Geophysics》2007,164(5):975-998
East Anatolia is a region of high topography made up of a 2-km high plateau and Neogene and Quaternary volcanics overlying
the subduction-accretion complex formed by the process of collision. The aeromagnetic and gravity data surveyed by the Mineral
Research and Exploration (MTA) of Turkey have been used to interpret qualitatively the characteristics of the near-surface
geology of the region. The residual aeromagnetic data were low-pass filtered and analyzed to produce the estimates of magnetic
bottom using the centroid method and by forward modelling of spectra to evaluate the uncertainties in such estimates. The
magnetic bottom estimates can be indicative of temperatures in the crust because magnetic minerals lose their spontaneous
magnetization at the Curie temperature of the dominant magnetic minerals in the rocks and, thus, also are called Curie point
depths (CPDs). The Curie point depths over the region of Eastern Anatolia vary from 12.9 to 22.6 km. Depths computed from
forward modelling of spectra with 200–600 km window sizes suggest that the bottom depths from East Anatolia from the magnetic
data may have errors exceeding 5 km; however, most of the obtained depths appear to lie in the above range and indicate that
the lower crust is either demagnetized or non-magnetic. In the interpretation of the magnetic map, we also used reduction-to-pole
(RTP) and amplitude of total gradient of high-pass filtered anomalies, which reduced dipolar orientation effects of induced
aeromagnetic anomalies. However, the features of the RTP and the total gradient of the high-pass filtered aeromagnetic anomalies
are not highly correlated to the hot spring water locations. On the other hand, many high-amplitude features seen on the total
gradient map can be correlated with the ophiolitic rocks observed on the surface. This interpretation is supported by Bouguer
gravity data. In this paper, we recommend that the sources of the widespread thermal activity seen in East Anatolia must be
investigated individually by means of detailed mapping and modelling of high resolution geophysical data to assess further
the geothermal potential of the region. 相似文献
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关于中国大陆岩石圈导电性结构研究越来越引起人们的重视,而目前研究大陆岩石圈导电性结构的主要方法是大地电磁测深(Magnetotelluric sounding).为此,在国家项目"深部探测技术与实验研究(SinoProbe)"专项里开展了"大陆电磁参数标准网实验(SinoProbe-01)"研究,完成了华北1°×1°地理坐标网度的大地电磁测深"标准点"阵列(Array)观测.本文详细论述了华北SinoProbe-01项目1°×1°MT"标准点"阵列观测实验的概况,以及通过精细的MT数据处理和一维Niblett-Bostick变换快速成像,所获取的华北地区岩石圈导电性三维成像模型.在分析华北岩石圈导电性结构特征的基础上,从电性结构角度把华北与邻区岩石圈划分为胶辽、燕山、鲁西、太行—吕梁等低导电性(高电阻率)块体,内蒙古、阿拉善和祁连中等导电性块体和黄淮、鄂尔多斯、秦岭良导电性(低电阻率)块体,进一步从导电性的角度证实了华北克拉通是由多个块体集合而成的观点. 相似文献
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地震系统实现与政府相关应急部门的单路点对点视频会议,为满足双方双路甚至多路的视频会议需求,采用编解码器的模数/数模转化技术,通过增加音视频切换器模块、音视频分配器模块和双绞线传输器模块,最终实现地震局值班室与应急办、指挥大厅与应急办的双路点对点视频会议,同时实现上海市地震局多路视频源信号与应急办传输功能,拓展沟通渠道,丰富通讯信息,保证信息传输及时有效. 相似文献
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川西高温水热活动区是地热学研究的典型地区之一,该区温泉、热泉点分布广泛,这些温泉大多沿北西-南东向的金沙江断裂、德格-乡城断裂、甘孜-理塘断裂、鲜水河三条主断裂呈条带状分布.对此高温水热活动区开展地热学分析,是研究青藏高原"东构造结"深部地球动力学过程、开发利用川西高原地热资源的重要基础,具有重要的科学研究意义和实际应用价值.本文针对实测氦同位素所发现的壳幔热结构比,依据重力、航空磁法、地震资料,采用反演莫霍面、居里面深度等方法,对川西高温水热活动区的深部热结构进行了分析.同时对中高温热泉密集出露的巴塘、理塘以及康定水热活动区的典型壳幔热流构与深部背景场进行了对比研究.结果表明,地表氦同位素热流估算的深部热流结构与地球物理异常结果保持较好的对应关系.川西地区热流结构中地壳、地幔的热贡献比较接近:巴塘地区平均Qc/Q=51.38%、理塘地区平均Qc/Q=54.39%、康定地区平均Qc/Q=42.42%.川西地区表现出了"温壳温幔"型的深部热结构,但温地壳背景下形成较高地表热流的原因有待进一步研究. 相似文献
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