红透山矿床变质岩系褶皱构造特征浅析

红透山式铜-锌矿床形成于太古代克拉通裂谷槽盆中海底火山喷发-沉积环境。因此，矿床的空间展布严格受特定的含矿岩系所控制。槽盆构造中的岩层褶皱构造最发育，矿床赋存在具多期褶皱构造叠加的大型同倾向形褶皱内，褶皱的层间虚脱是控矿有利构造空间，可以借此预测矿体侧伏方向及赋存部位。     

地铁隧道开挖引起地表塌陷分析

深圳富水软弱地层地铁隧道开挖中出现的工作面失稳及由此引起的地表塌陷是地铁安全施工中极其重要的方面，对施工安全、进度都有较大影响，同时也对整个工程造成巨大的经济损失。通过对深圳地铁Ⅰ期工程土建施工中全线部分暗挖标段出现的工作面失稳、地表塌陷工程实践和现场监测结果分析，特别着重对连续2次出现地表塌陷的3A标暗挖隧道研究，从隧道上覆地层物理力学性质参数、地层变形监测分析及施工工艺原因3方面阐述了地表塌陷的原因。明确提出剪切破坏线和失水空洞区的概念，确定出引发地表塌陷的主导因素为施工工艺原因。建议针对该类地层条件，应做好超前地质预报．适当调整预加固参数．加强隧道结构和地表的动态变形监测，施工技术人员做到准确了解施工现场动态，及时调整施工工艺参数，以保证隧道的安全施工。分析结果对深圳地铁Ⅱ期工程施工及类似地层条件地下工程施工提供科学预测、预防地表塌陷的方法和技术措施，达到地铁隧道施工中经济效益与安全施工的统一。     

Regional moment tensor uncertainty due to mismodeling of the crust

The retrieval of earthquake moment tensor (MT) requires the response of the medium, in which seismic waves travel from the hypocenter to the stations, to be known. In inverting long-period (LP) seismic data (teleseismic and LP regional records), a gross earth model is sufficient; with decreasing periods, a more detailed model is needed. This is the case when waveforms of weak earthquakes at regional distances are to be inverted. Regional moment tensors (RMTs) of mostly Mediterranean earthquakes are determined on a routine basis by the Swiss Seismological Survey (SED) by using averaged models of the earth's crust. By inverting broad-band records of the M_w=4.8 earthquake near Udine, N Italy, on Feb. 14, 2002, we tested the sensitivity of the MT solution with respect to possible errors in the earth model used and in the location of the hypocenter depth. We perturbed the P and S velocities and the thickness in the 1-D earth model in the range from 3% to 30% of the parameter values and constructed estimates of confidence regions of the MT and error bars of the source time function (STF) and scalar moment in three frequency bands. Similarly, these error characteristics were determined assuming a mislocation in the hypocenter depth. We found that, in the band of periods from 25 to 50 s, the mechanism is resolved well (at the confidence level 95% at least) up to an earth model uncertainty of 30%, in the passband 10–25 s up to about 10%, but it is undetermined completely at periods of 5–10 s. An error in hypocenter depth of as much as double the value reported by the location procedure does not destroy the resolution of the mechanism at periods above 10 s. In the RMT catalog of the SED, earthquakes of M_w greater than about 3.5 are processed at periods above 30 s; thus, the solutions for these events are robust with respect to a possible uncertainty in the earth model used. Mechanisms of weaker earthquakes, retrieved from short periods, should be interpreted with caution.     

信号传输的屏蔽措施与研究

为了保证信息的正常传输,当布线环境有电磁干扰时,要相应地采用屏蔽系统。为了保证电子设备的正常工作,采用适当的屏蔽措施来阻挡或衰减电磁干扰。本文阐述了在现阶段雷灾中屏蔽的重要性以及屏蔽的具体施工,并对屏蔽的检验提出了一定的见解。     

南极冰貌卫星影像条带噪声的剔除

本文在简要叙述条带噪声形成原因的基础上 ,针对南极地区的ASTER 1A的可见光影像中出现的条带噪声的现象 ,通过设计了基于切比雪夫窗、凯瑟窗的FIR滤波器和约束最小二乘FIR滤波器对其条带噪声进行剔除 ,这两种滤波器能够尽可能地剔除条带 ,同时使影像的灰度分布发生最小畸变。并通过与其他方法 (例如 :低通滤波 ,直方图匹配等 )比较 ,说明这两种滤波的方法优于其他的方法     

基于等高线的DEM生成算法研究和实现

数字高程模型是近年来发展起来的为地理信息系统提供空间分析和辅助决策的数据基础。随着科学技术特别是计算机技术的迅速发展，DEM在数据获取方法、数据存储和数据处理速度等方面已经取得突破性进展。通过系统介绍生成DTM过程中等高线的离散化方法，DELAUNAY三角网的特性和基于等高线数据的TIN的建立，以及对产生的问题的一些解决方法。     

基于物方影像匹配和概率松弛的断面自动提取

提出了基于物方影像匹配的断面提取,为了提高匹配的可靠性,引入了概率松弛法,最终获得了高精度的断面.     

等高线拓扑关系的构建以及应用

提出了等高线拓扑关系的描述框架 ,其规范化描述形式具有更强的适用性 ,使用三角网作为工具设计了建立拓扑关系的算法。以提出的拓扑关系描述为基础 ,具体实现了等高线高程自动赋值 ,处理过程可以同时考虑开曲线 (包括断线 )和闭曲线 ,提高了可靠性和自动化程度 ,并进一步将断线连接为完整目标 ,减少了人机交互的编辑工作     

The dependence of response spectrum on the tectonic ambient shear stress field

Introduction The acceleration response spectrum and peak ground acceleration are the necessary and im-portant parameters in earthquake-resistant design at present. They are still active research field. With the increase of digital high accurate strong motion observation data, especially the earth-quakes of Loma Prieta (M=7.0) in 1989; Landers (M=7.3) in 1992; Big Bear (M=6.4) in 1994 and Northridge (M=6.7) in 1994 in USA; Kozani (M=6.6) earthquake and afteshocks in 1995 in Greece; Dinar…