A formulation for reliable estimation of active crustal deformation and its application to central Greece   总被引：5，自引：0，他引：5  

Constantinos B. Papazachos  Anastasia A. Kiratzi 《Geophysical Journal International》1992,111(3):424-432

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Spatial and temporal variations of Fennoscandian seismicity     

Efthimios Skordas  Ota Kulhánek 《Geophysical Journal International》1992,111(3):577-588

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天津岩溶地热田热储特征研究     

隋少强  汪新伟  周总瑛  刘金侠  毛翔 《地质与资源》1992,28(6):590

从天津大地构造特征和地层分布入手，综合分析了岩溶热储特征.认为天津地区主要大地构造格局从西北向东南依次为冀中拗陷、沧县隆起和黄骅拗陷，主要断裂有北东向的沧东断裂、天津断裂以及北西向的宁河-宝坻断裂.岩溶地热田主要分布在沧县隆起上，发育了王草庄、大城、潘庄、双窑和小韩庄凸起等地热田.研究认为蓟县系雾迷山组在天津全境普遍分布，岩性为深灰色粗晶白云岩、隧石条带状白云岩，裂缝岩溶发育，孔渗性较好，是主要热储层.寒武系、奥陶系热储在沧县隆起核部大面积缺失，在其他地区广泛分布，是主要热储层之一.沧县隆起的热流值较周围地区高，地热水的来源主要为北部蓟县山区，热水运移的最重要通道是大断裂以及不整合面.  相似文献   

关于岩石导热性野外测定方法的研究     

江海 《地质与资源》1992,29(3):282-288

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论构造成矿规律及其动力学机制   总被引：1，自引：2，他引：1  

张湘炳 《大地构造与成矿学》1992,16(2):113-122

本文在简述构造成矿学概念的演进之后.着重论述了构造成矿的对称性、等距性、递变性和侧向迁聚性等规律,对构造成矿的动力机制进行了初步分析.作者指出.构造动力成矿作用,是构造应力场、构造地球牾场和构造地球化学场的综合作用;构造成矿过程,是构造运动和成矿物质运动的全过程:是一种不断存在物质交换和能量交换的开放体系中的不可逆过程.构造动力作用能促使成矿元素活化.驱动含矿溶液运移.改变成矿的物理化学条件,导致成矿物质聚集.构造成矿动力学机制的研究.是构造成矿学的关键问題.随着构造成矿学研究的深入发展.逐渐形成了构造成矿学的基础理沦系统.  相似文献   

Least squares best-fit circles (with applications to Mohr''s diagram)     

Richard J. Lisle 《Mathematical Geology》1992,24(5):455-461

Procedures are outlined for the selection of a least squares best-fit circle to data points defined by rectangular Cartesian coordinates. Equations are derived to allow fitting of circles centered on the x-axis as well as off-axis Mohr circles. These procedures are applicable to the estimation of second-order tensors such as stress and strain by means of Mohr's diagram.  相似文献   

Numerical algorithm for the dynamic analysis of base-isolated structures with dry friction     

S. Dimova  V. Georgiev 《Natural Hazards》1992,6(1):71-86

This paper deals with the techniques for solving ordinary differential equations with essential nonlinearity arising from the representation of frictional force by the sign function of the relative velocity. This problem is connected with dynamic behavior studies of base-isolated structures with dry friction devices.Mathematical evidence is presented concerning the inaccuracies of the solution which are connected with the representation of the frictional force by the sign function. An approximation of this sign model is made on the basis of the appropriate linearization of a small part of the frictional force function. A numerical algorithm for the dynamic analysis of base-isolated structures with dry friction is proposed. Numerical tests are carried out for establishing the exactness of the proposed techniques. The obtained results prove the accuracy of the techniques.  相似文献   

关于野外观测和数据处理相联系的理论问题     

卓健成 《四川测绘》1995,18(2):51-56

现代野外观测和数据处理常常分开来研究，在理论的联系上它们应该是一个整体，而且应该把野外观测的高质量，作为正确实施数据处理的前提条件，在进行数据处理的时候，应该严谨对待其全过程的每一步骤。  相似文献   

矢量数据的一种分层动态组织方法     

邓朝晖  贾华 《武汉大学学报(信息科学版)》1995,(2)

提出矢量数据分层组织的一种动态结构，在该结构中，单点、单字符或符号作为基元，以属性串组织基元，并分层叠置。采用区别于链式结构的动态通用串结构及Ｃ语言予以实现。  相似文献   

On the Development of Meso-Scale Heavy Rain Parcels in China     

Zhang Yan 《大气科学进展》1995,12(1):79-86

Heavy rains occur in China frequently, which often bring us floods and serious disasters in the summer half-year. The meso-scale heavy rain parcels (MHRP) in the mid-latitude are usually developed in following cases:I.By the approaching, meeting and / or overlapping of different weather systems, when two or more different rainfall systems are getting to conjugate, some MHRPs could be developed, such as: 1) a new cold/warm front or squall line approaches an old front or squall, even when the old one is somewhat decrepit; 2) at the places where two or more synoptic systems with different characteristics are meeting together, such as the meeting of tropical cyclone with the cold airs coming from the mid- and / or high-latitudes, or the low latitude vortex meeting with the westerly trough; 3) at the intersections of some different weather systems, such as the intersection of drylines, squall lines or fronts moving from different directions; and 4) by the overlapping of rainfall parcels produced continuously  相似文献