共查询到20条相似文献，搜索用时 62 毫秒
1.
2.
《地震地磁观测与研究》2016,(6)
地震预警系统是一种能够有效减轻地震灾害的新手段。中国目前初步研制了地震预警和烈度速报软件系统,兰州市地震预警示范中心正在实验运行一套软件系统,目前震后利用该系统产出的预警和烈度速报信息报告未实现自动化,本文提出自动产出总结报告软件的研制方案。该软件利用COM技术,调用Word和Excel自动化服务器中的OLE自动化对象,将地震预警和烈度速报信息报告所需文字、图片、表格等信息自动插入,实现文档的自动生成,为震后快速决策节省时间。 相似文献
3.
4.
5.
针对地震信息系统应当在大地震发生后快速发布地震烈度速报信息的需求,结合国际烈度速报信息发布系统建设经验,设计并实现SeisMIS地震烈度速报信息发布系统,并在成都市烈度速报台网中进行应用,对于提升地震烈度速报信息的网络化应用有较好的参考价值. 相似文献
6.
7.
做好地震信息服务需要深入研究服务的公众触达和反馈。随着国家地震预警工程的推进,地震预警系统即将大范围面向公众提供服务,因此公众的地震预警需求、地震预警误报接受程度等问题亟需研究。本文设计了防震减灾公共服务公众接触率及公众满意度调查指标体系,用以量化测量防震减灾公共服务的公众触达现状和反馈评价,并取得了较好的效果。全国公众调查结果显示,分别有80.7%,56.2%,29.5%和26.7%的受访者接触过地震速报信息服务、防震减灾知识科普、自建房抗震咨询服务和各级地震部门门户平台,各项服务的公众接触有明显的区域和人群特征。公众反馈评价总体较好,但是地震速报信息服务及时性的满意度评价得分相对较低,显示公众对地震速报信息发布时效性在近年来取得的进步缺乏直观感受。地震预警公众需求研究结果显示,88.3%的公众认为地震预警有必要,56.8%的公众对地震预警信息有强烈需求,公众对地震预警误报的接受程度在过去十年时间里保持在一个较高水平,大城市和地震多发区公众对地震预警的需求和对地震预警误报接受程度均显著高于全国公众总体水平。 相似文献
8.
<正>地震预警在破坏性地震初至波到来前,提供几秒到几十秒的预警时间,可采取相应的应急措施。烈度速报在破坏性地震发生后数分钟之内,绘制出受灾地域的烈度图,快速评估人员伤亡和经济损失情况,并能够为应急救援和工程抢修提供决策依据。这两种技术有助于降低震后损失,减少次生灾害和人员伤亡。论文重点研究了地震预警与烈度速报两种技术的工 相似文献
9.
基于地震台站专业设备和通用设备的运行维护工作特点，根据内蒙古自治区地震局各类省级地震监测台网目前所辖子台数量以及即将建设的烈度速报与预警工程监测站点数量，结合内蒙古自治区独有的区位特点，通过对地震系统兄弟单位运维体系及系统外已有行业案例调研考察，积极探索分布式运维模式的可行性。考虑支持分布式运维管理体制的支撑保障体系，在总结集中运维模式弊病的前提下，提出满足内蒙古自治区地震台站运维需求的省级地震监测中心、区域中心台、地震台三级运维模式，期望在运行中不断发现问题并完善。 相似文献
10.
《地震工程与工程振动》2017,(6)
国家地震烈度速报和预警工程实施后,地震台网密度将发生很大变化,这将对地震烈度速报产生影响。本文以台湾简易烈度计网(P-alert)记录到的高雄M6.7级地震为基础,模拟了全国重点预警区、日本和美国等四种密度的台网,通过比较和分析四种台网的烈度速报结果,研究台网密度变化对地震烈度速报造成的影响,并讨论可能存在的问题。结果表明:台站分布均匀的情况下,台间距越小,控制烈度空间分布的总体趋势越好;密度较高的台网能更好勾画地震能量的释放过程,有助于评判破坏性地震中断层的破裂过程和方向等参数。本文研究结果可为国家工程中烈度速报研究提供一定参考和借鉴。 相似文献
11.
《Advances in water resources》2005,28(7):701-710
The patterns of temporal variations of precipitation (P), streamflow (SF) and baseflow (BF) as well as their nitrate-nitrogen (nitrate) concentrations (C) and loads (L) from a long-term record (28 years) in the Raccoon River, Iowa, were analyzed using variogram and spectral analyses. The daily P is random but scaling may exist in the daily SF and BF with a possible break point in the scaling at about 18 days and 45 days, respectively. The nitrate concentrations and loads are shown to have a half-year cycle while daily P, SF, and BF have a one-year cycle. Furthermore, there may be a low-frequency cycle of 6–8 years in C. The power spectra of C and L in both SF and BF exhibit fractal 1/f scaling with two characteristic frequencies of half-year and one-year, and are fitted well with the spectrum of the gamma distribution. The nitrate input to SF and BF at the Raccoon watershed seems likely to be a white noise process superimposed on another process with a half-year and one-year cycle. 相似文献
12.
13.
燕郊等测点迁移优化与地磁观测研究 总被引：1，自引：2，他引：1
为优化地磁观测条件，开展了燕郊、夏垫等测点迁移工作；按照测眯迁移原则与实施技术方案，完整地收集并整理了地质构造与地球物理等方面的基本资料；进行了野外实地勘察，磁场梯度的测量，确定了新测点，在新老测点上进行了较长时间的地磁场对比观测；应用多种方法分析研究了地磁对比观测资料，结果表明，新老测点与有关测点的地磁变化具有良好的一致性，并得到了新老测点之间的地磁数据的按点差。 相似文献
14.
15.
16.
17.
18.
19.
Assessing Groundwater Depletion and Dynamics Using GRACE and InSAR: Potential and Limitations 
下载免费PDF全文
下载免费PDF全文 Pascal Castellazzi Richard Martel Devin L. Galloway Laurent Longuevergne Alfonso Rivera 《Ground water》2016,54(6):768-780
In the last decade, remote sensing of the temporal variation of ground level and gravity has improved our understanding of groundwater dynamics and storage. Mass changes are measured by GRACE (Gravity Recovery and Climate Experiment) satellites, whereas ground deformation is measured by processing synthetic aperture radar satellites data using the InSAR (Interferometry of Synthetic Aperture Radar) techniques. Both methods are complementary and offer different sensitivities to aquifer system processes. GRACE is sensitive to mass changes over large spatial scales (more than 100,000 km2). As such, it fails in providing groundwater storage change estimates at local or regional scales relevant to most aquifer systems, and at which most groundwater management schemes are applied. However, InSAR measures ground displacement due to aquifer response to fluid‐pressure changes. InSAR applications to groundwater depletion assessments are limited to aquifer systems susceptible to measurable deformation. Furthermore, the inversion of InSAR‐derived displacement maps into volume of depleted groundwater storage (both reversible and largely irreversible) is confounded by vertical and horizontal variability of sediment compressibility. During the last decade, both techniques have shown increasing interest in the scientific community to complement available in situ observations where they are insufficient. In this review, we present the theoretical and conceptual bases of each method, and present idealized scenarios to highlight the potential benefits and challenges of combining these techniques to remotely assess groundwater storage changes and other aspects of the dynamics of aquifer systems. 相似文献
20.
Summary This paper discusses the influence of system stiffness on the dynamic instability of fault surfaces under laboratory conditions for a number of test modes. In conjunction with shear load stiffness, the normal load stiffness, often neglected, is shown to have a considerable effect on the stick-slip process —its presence or absence and its characteristics. Also appropriate stiffnesses are suggested for an earthquake sequence modeled as a growing dislocation. 相似文献