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In seismic hazard analysis of nuclear power plant of China there is a need to identify both seismogenic structures and seismotectonic zones. In past practice, the identification of the seismogenic structures was often based on the surface active faults and characterization of linear seismic source. In a situation which shows quite strong non-random seismic activity and lacks surface active faults, it is difficult to evaluate the seismic hazard reasonably. Taking seismogenic structures in the Dayao-Yao'an area as a case study in this paper, we discuss the need and the possibility to apply the planar seismogenic structure to the seismotectonic method. We suggest that the planar seismogenic structure should be considered when applying the seismotectonic method to the seismic risk assessment of nuclear engineering in future. 相似文献
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Based on the research content and conception of dynamics of tectonic ore-forming processes, with the focus on the dynamics
and processes of mineral source, ore formation, transport, accumulation, dissipation and mineralization in response to magmatic
invasion and metallogenic fluid under tectonic stress, this paper deals with the ore-finding method of fault tectono-geochemistry
and its application on the basis of ore deposit genesis, “giant pressure shadow” structure and ore-finding method of tectonic
stress field in the Tongchang orefield, expounds the rules of magmatic emplacement and ore fluid migration and concentration
under the control of the structural stress field, hence providing the theoretical basis for the localization and prognosis
of concealed ores. The fault tectono-geochemical features show that the Cu-Au polymetallic ore deposits (mineralization) in
the orefield are closely related with volcano-(exhalation) sedimentation, magmatism and tectono-reworking. Fault tectono-geochemical
anomalies can be applied to prognosis of metallogenetic target areas for ore exploration and can provide strong evidence of
“giant pressure shadow” structure. In addition, quite a number of important target areas have been defined in combination
with the characteristics of the tectonic stress field, and part of the target areas have been proved by practical activities. 相似文献
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WEB平台下地理信息系统的构造方法和模型 总被引:2,自引:0,他引:2
WEB平台下地理信息系统的主要构造方法有CGI法,服务器应用程序接口,插件,ActiveX控件,Java Applet法等。构造模型有B/S三层结构,基于中间件的B/S多层结构,交互操作,空间数据源的分步骤服务模型等。传统的GIS系统固有的封闭性决定了不同的GIS平台下的空间数据无法共享,选择成熟的构造方法和构造模型,建立WEB平台下的地理信息系统,通过WEB浏览器访问GIS空间数据库,实现真正的空间数据共享。 相似文献
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Web技术和GIS技术结合,是利用Web技术来扩展和完善地理信息系统的一项新技术。本文对WebGIS设计思想进行介绍,着重对WebGIS的多种构造方法及相关特点进行比较和分析。 相似文献
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