实时数据处理系统在乌鲁木齐遥测地震台网中的作用     

胥颐  徐戈 《内陆地震》1995,9(1):54-61

乌鲁木齐遥测地震台网是目前国内同类台网中孔经最大、直传距离最远的全无线传输网络。对于控制乌鲁木齐及北疆部分地区的地震活动起到重作用。除了传统的模拟信号记录外，实时事件数字采集和相应数据处理系统成为该台网的特色之一。本文将详细介绍该系统的软硬件配置、信道及参数选择、运行功能等方面的情况；最后使用１９９３年９￣１１月发生在相应区域内的地震对采集效果和定位能力进行检验。  相似文献   

Hierarchical Clustering Analysis of Focal Mechanism Solutions, Taking the Haicheng Earthquake Sequence as an Example     

Diao Gulling  Yu Limin  and Li QinzuSeismological Bureau of Hebei Province  Shijiazhuang  China 《中国地震研究》1995,(1)

The currently used methods for analyzing a number of focal mechanism solutions are often ineffective for large samples.With the aid of the basic concept of hierarchical clustering methods for pattern recognition and in combination with the expression of focal mechanism solutions themselves,the sum of the angle between P-axes and the angle between T-axes of 2 solutions is defined as a distance,and a software for hierarchical clustering analysis by the shortest distance method and longest distance method is compiled.The number of types in the clustering results can be determined in accordance with different requirements.For focal mechanism solutions of the same type,the average position of each stress axis can be calculated by the method of vector composition and thereby the spatial orientation of the average focal mechanism solution can be determined.In order to test the feasibility and reliability of the software,hierarchical clustering analyses are made for the focal mechanism solutions of 24 earthquak  相似文献   

The representation of geoscience information for data integration   总被引：17，自引：0，他引：17  

Chang-Jo F. Chung  Andrea G. Fabbri 《Natural Resources Research》1993,2(2):122-139

In mineral exploration, resource assessment, or natural hazard assessment, many layers of geoscience maps such as lithology, structure, geophysics, geochemistry, hydrology, slope stability, mineral deposits, and preprocessed remotely sensed data can be used as evidence to delineate potential areas for further investigation. Today's PC-based data base management systems, statistical packages, spreadsheets, image processing systems, and geographical information systems provide almost unlimited capabilities of manipulating data. Generally such manipulations make a strategic separation of spatial and nonspatial attributes, which are conveniently linked in relational data bases. The first step in integration procedures usually consists of studying the individual charateristics of map features and interrelationships, and then representing them in numerical form (statistics) for finding the areas of high potential (or impact).Data representation is a transformation of our experience of the real world into a computational domain. As such, it must comply with models and rules to provide us with useful information. Quantitative representation of spatially distributed map patterns or phenomena plays a pivotal role in integration because it also determines the types of combination rules applied to them.Three representation methods—probability measures, Dempster-Shafer belief functions, and membership functions in fuzzy sets—and their corresponding estimation procedures are presented here with analyses of the implications and of the assumptions that are required in each approach to thematic mapping. Difficulties associated with the construction of probability measures, belief functions, and membership functions are also discussed; alternative procedures to overcome these difficulties are proposed. These proposed techniques are illustrated by using a simple, artificially constructed data set.  相似文献   

微气象观测数据采集系统   总被引：1，自引：2，他引：1  

卫国安  牛玉清 《高原气象》1990,9(2):183-189

微气象观测数据采集系统是微气象自动观测网的子系统。该子系统包括塔站、辐射站的数据采集以及塔站向中心站的数据传输。本文介绍了这两部分的硬件组成及软件编制,并从原理上描述了研制温度传感器时采用的“准噪声测量消噪法”这一特殊技术。  相似文献   

铀矿资源总量预测中放射性水化学变量的识别     

刘海廷 《铀矿地质》1988,(6)

作者采用逻辑信息法完成了XZ矿田铀矿资源总量预测任务。基于这一实践,作者提出了放射性水化学变量的识别方法,即借助计算机进行数据处理。概括地说此法包括3个主要内容:设置变量、双态转换和标志筛选。该方法不仅为资源总量预测进行放射性水化资料的处理摸索出一条新路子,而且为放射性水化找矿辨认重要找矿标志提供了一种新的技术手段。  相似文献   

COMPILATION OF HEAT FLOW DATA IN THE CHINA CONTINENTAL AREA (2nd Edition   总被引：16，自引：4，他引：16       下载免费PDF全文

Wang Ji-yang  Huang Shao-peng 《地震地质》1990,12(4):364

During the last 2 years, heat flow data increased significantly in China as a result of implementation of many comprehensive geodynamic (including geothermal) projects and GGT project in China. In this paper, a total of 366 reliable heat flow data is collected from published and in press sources in the Compi-ilation of Heat Flow Data in the China Continental Area (2nd edition). Statistic analysis of these data shows that the heat flow values in China continental area vary from 20 to 14...  相似文献   

甘肃省地震分析预报计算机实用软件系统研究          下载免费PDF全文

郭建康  郭大庆  王振亚 《地震工程学报》1994,16(2):91-95

本文概略地介绍了甘肃省地震分析预报计算机实用软件系统。该系统充分利用了已形成的软，硬件资源，实现了区域综合数据库，实用化攻关软件，分析预报专家系统和会商系统的联机，以发挥分析预报的整体效益。实际使用表明，该系统具有较好的区域性和实用性，改善了甘肃省地震分析预报工作。  相似文献   

用微分几何理论进行数据诊断     

刘权威  边少锋 《测绘学院学报》1994,(1)

本文用微分几何中的概念，提出了用曲线的变化率、加速率及其曲率三种指标进行数据诊断；利用Ｃｐ影响图为降权法诊断平差提供了赋权依据。文中给出的算例表明，所提诊断指标是有效的，并且能成功地剔除强影响点。  相似文献   

长江三峡地区资源遥感图像处理中的几个技术难题     

潘贤章  曾志远 《遥感学报》1994,(3)

本文对长江三峡地区资源遥感图像处理中的三个技术难题进行了讨论并提出了解决办法：（１）跨两高斯投影带的卫星遥感图像的几何校正，采用分两个子区校正的办法，提出一个简便而有效的确定子区范围的方法；（２）同类异谱问题采用类型细分的方法来解决，类型细分时考虑阴阳坡、作物季相及植被覆盖度等影响因素；（３）同谱异类带来的错分类，可引进地理控制系统对其校正，从而提高了成图精度。  相似文献   

用摄影测量方法获取大比例尺数字地面模型数据的在线质量控制     

江延川  万志龙 《测绘学院学报》1989,(2)

在本文中,用实验的方法确定了由取样数据再建地形表面的误差和取样间隔之间的线性关系。正是这一关系的简单性和稳定性,为数字地面模型数据扶取的在线质量控制提供了一个可靠的方案。  相似文献