共查询到18条相似文献,搜索用时 140 毫秒
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在分析地震烈度速报数据传输特点后,提出将卫星通信引入烈度速报系统。通过对目前中国使用较多的北斗卫星、海事卫星、铱卫星系统和VSAT卫星系统进行对比,选取铱星短消息和海事卫星数据流这两种典型通讯方式,设计由通用数字强震仪与卫星通信系统结合地震速报通讯模块组成的实验系统,实现数字强震动记录信息通过卫星信道进行的数据传输,展现卫星通信在地震烈度速报数据传输中的应用前景。 相似文献
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广东强震动台网传输系统GPRS网络接入应用方案 总被引:1,自引:1,他引:0
“十五”期间,广东省新建了初具规模的数字强震动观测台网。为达到强震动观测台网监测、传输、控制、管理于一体的目的,利用了无线网络通信技术,进行了GPRS网络接入及传输系统的研发应用。从GPRS网络接入背景、GPRS网络接入方案及优势、传输系统应用及其特色等方面对广东强震动台网传输系统GPRS网络接入应用方案进行了详细介绍。 相似文献
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李惠智 《地震地磁观测与研究》2010,31(Z1)
宁夏数字强震动台网观测系统是国家重点建设的防震减灾基础设施项目,由48个数字观测台站和1个强震动台网中心组成.台站采用无人值守方式,利用电话拨号、CDMA和扩频微波以及卫星传输的方式,在台网中心与各强震台之间建立连接,实施远程监控.台网全部采用先进的数字技术,使宁夏强震动观测技术发生了质的变化, 填补了宁夏境内没有固定数字强震台站的空白,大幅度增强了获取近场强震动数据的能力.当宁夏发生4级以上地震时,可以获得多台强震动记录;同时,在监视区范围内发生3级以上地震时,亦可获得多台近场加速度记录,从而为震害快速评估和制定震后应急决策提供可靠依据. 相似文献
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《地震地磁观测与研究》2016,(5)
2015年4月15日内蒙古阿拉善盟阿拉善左旗发生M 5.8地震,国家强震动台网中心获取39组强震动记录。对此地震进行反应谱和傅里叶谱分析,得出峰值加速度图和仪器烈度图,得到仪器烈度值最大为6.5度,震中距最小的地震台仪器烈度为6.2度,与震中现场灾害评估烈度7度、大部分地区6度一致,充分体现了强震动台网建设成效。 相似文献
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发展地震烈度速报系统是我国现阶段防震减灾事业的一项重要工作.其目的是在地震发生后,对强震动数据进行实时分析和处理,快速给出强震对地表的破坏程度——地震烈度分布图.鉴于目前国内强震动台网分布密度及数据传输方式等诸多因素的限制,多数烈度速报系统是基于美国的ShakeMap系统进行二次开发生成烈度分布图,其计算过程更多地依赖于对地震破裂过程的反演及地震烈度衰减关系,产出的烈度图是静态位图,分辨率较低,与丰富的地理信息难以无缝衔接(Wald et al,1999a;张晁军等,2010;泽仁志玛等,2006). 相似文献
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Shi Shuzhong 《中国地震研究》2004,18(2):105-113
Based on intensity data in Shanghai and its adjacent region, the intensity attenuation relation is determined. Selecting the western United States as a reference area where there are rich strong ground motion records and intensity data, and by determining ground motion attenuation relation in an area lacking in strong ground motion data, we obtain the ground motion attenuation relation in Shanghai and its adjacent region. 相似文献
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通过分析陕西省现有强震动台网在汶川8.0级地震中所起到的作用和存在的不足,以及对照国外地震烈度速报建设经验,研究陕西省地震烈度速报系统建设的关键问题,从台网密度、通讯传输、建设成本三个方面提出合理建议。 相似文献
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我国强地震动记录特征综述 总被引:3,自引:1,他引:2
本文概述了我国强地震动台网的发展历程, 总结了唐山地震的强地震动记录特征和2007年以来我国数字台网获取的强地震动记录特征, 重点分析了近年来发生的几次典型破坏性地震的强地震动记录特征. 结果表明: 我国近场地震动记录体现了近场的方向性效应、 上/下盘效应、 速度脉冲、 局部场地效应等多样性特征, 可以进一步服务于地震工程领域的科学研究与工程应用. 相似文献
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上海及邻近地区地震动衰减关系研究 总被引:6,自引:1,他引:6
选择有丰富强震记录和地震烈度资料的美国西部地区作为参考地区,根据上海及邻近地区的地震烈度资料,确定上海及邻近地区地震烈度衰减关系;采用缺乏强震资料地区地震动参数衰减关系的确定方法,转换得到本地区的地震动参数衰减关系。 相似文献
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P-alert台网实时数据对地震预警及烈度速报和工程地震研究都是重要的补充,处理分析这些数据对客观衡量P-alert台网数据质量和数据用途有重要意义。对2016年2月6日台湾美浓ML6.4地震P-alert台网获取的记录进行了处理和初步分析,统计分析显示100gal以上加速度记录有112条,200gal以上加速度记录有33条,400gal以上加速度记录有7条,东西向最大峰值加速度为466.4gal,南北向最大峰值加速度为498.4gal,竖直向最大峰值加速度为258.6gal,最大仪器地震烈度为9.5度。竖直向峰值加速度和峰值速度比水平向峰值加速度和峰值速度衰减快。峰值加速度比峰值速度衰减快,观测峰值加速度和峰值速度与台湾西南地区峰值加速度和峰值速度衰减公式比较一致。计算得到了近场台站的永久位移,显示P-alert台网绝大多数永久位移在1cm到5cm之间,最大永久位移达8cm。 相似文献
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Early warning systems are becoming increasingly important in the modern world. These systems combine several components: predictive systems (For example, tsunami warning systems), earthquake early warning systems, emergency message services, and systems of seismic damage monitoring. Information about shaking intensity becomes especially important in the case of a strong earthquake occurrence. These data are necessary for planning emergency rescue operations, but they are difficult to collect in a natural disasters situation because of possible communication problems. Application of data on instrumental seismic intensity may make it possible to solve this problem. Early warning systems predicting seismic intensity distributions just after the occurrence of an earthquake have already been developed in many seismically active regions of the world. Such a system also needs to be implemented in Kamchatka, where the strongest earthquakes can produce extremely high values of strong motion acceleration. As a result of the development of a system for seismological observation in Kamchatka, a unified specialized system for collection, transmission, archiving, and processing of seismic information was created. Seismological observations in Kamchatka were significantly improved with the update of the tsunami warning service in 2006–2011. As a result, a network of strong motion stations is currently operating in Kamchatka and can serve as a basis for creating a quasi-real-time seismic early warning system under the auspices the Kamchatka Branch of the Geophysical Survey, Russian Academy of Sciences (KB GS RAS). It uses data from strong motion stations to estimate the instrumental seismic intensity in quasi-real-time mode and visualizes the results. During the operational period while the service is being intensively used in the framework of the Seismic Early Warning Reports Tsunami Warning Service in the Kamchatka and Sakhalin branches of the GS RAS for real-time warning of interested parties about the shaking intensities at observation points, the technology implemented in this service has proved highly informative. In total, 75 messages on instrumental intensity in various places of Kamchatka krai and the northern Kuril Islands (Paramushir Islands) have been sent since the service was commissioned at the end of 2014. The currently operating version of the service has proved its informativeness and applicability for special departments of the Emergency Situations Ministry. In addition, real-time warning has improved coordination between the departments of KB GS RAS, and the results of this system are being used in a number of basic research projects. Further development of the service is related to the creation of denser instrumental networks to record strong ground motions and the transition to automatic decision-making and message sending. 相似文献