SAR影像在立体测图中的应用

通过对机栽2．5m分辨率SAR影像的布点、平差及单片计算,进一步构建了邻航线间SAR影像的立体模型配对,并通过FeatureStation工作平台的矢量化采集,完成了1：50000比例尺的DLG测图工作。     

Decomposing InSAR LOS displacement into co-seismic dislocation with a linear interpolation model： A case study of the Kunlun Mountain Ms=8.1 earthquake

It has always been a difficult problem to extract horizontal and vertical displacement components from the InSAR LOS （Line of Sight） displacement since the advent of monitoring ground surface deformation with InSAR technique. Having tried to fit the firsthand field investigation data with a least squares model and obtained a preliminary result, this paper, based on the previous field data and the InSAR data, presents a linear cubic interpolation model which well fits the feature of earthquake fracture zone. This model inherits the precision of investigation data; moreover make use of some advantages of the InSAR technique, such as quasi-real time observation, continuous recording and all-weather measurement. Accordingly, by means of the model this paper presents a method to decompose the InSAR slant range co-seismic displacement （i.e. LOS change） into horizontal and vertical displacement components. Approaching the real motion step by step, finally a serial of curves representing the co-seismic horizontal and vertical displacement component along the main earthquake fracture zone are approximately obtained.     

对防震减灾中心弱电设计几个问题的思考

介绍了弱电设计的概念。就防震减灾中心弱电设计存在的普遍问题，从总体设计、综合布线、系统集成、监控方式几方面进行了讨论，指出，防震减灾中心的弱电设计应对系统功能要求作全面细致的分析和进行工程参数的计算，要对安装工艺接口界面有详细的要求和文字说明，要有充分的预留孔洞、预埋件等。     

Response spectral attenuation relationships for Sumatran-subduction earthquakes and the seismic hazard implications to Singapore and Kuala Lumpur

Singapore and Kuala Lumpur, the capital of Malaysia, may well represent the classic examples of area with low seismic hazard but with high consequence. Both cities are located in a low-seismicity region of Southeast Asia, where active seismic sources are located more than 300 km away. Seismic designs have not been implemented in this seemingly low-hazard region though distant earthquakes in Sumatra had frequently shaken high-rise structures in the two cities. Several studies have been conducted to systematically assess the seismic hazards of Singapore and the Malay Peninsula. The present research particularly addresses issues in deriving a new set of attenuation relationships of peak ground acceleration (PGA), peak ground velocity (PGV) and response spectral acceleration (RSA) for the Sumatran-subduction earthquakes. To be relevant for the seismic hazard assessment of the remote metropolises, the derived attenuation relationships cover a long distance range from 150 to 1500 km. The attenuation relationships are derived using synthetic seismograms that account for source and path effects. The uncertainties in rupture parameters, such as stress drop, strike, dip and rake angles, have been defined according to the regional geological and tectonic settings as well as the ruptures of previous earthquakes. The seismic potential of the Sumatran subduction zone are high in the region from 2°N to 5°S as there has been no recurrence of great thrust events since 1861. A large event with M_w greater than 7.8 in this particular subduction zone may be capable of generating destructive ground motions in Singapore and Kuala Lumpur, even at a distance of 700 km.     

NaCl-CaCl2-H2O体系人工合成流体包裹体及其冷冻后的熔融行为研究

在倪培等在2003年和丁俊英等在2005年成功开展人工合成包裹体研究的基础上,利用愈合人工水晶裂隙技术,在设定的实验条件下合成了 NaCl-CaCl_2-H_2O 体系的流体包裹体。对合成的包裹体进行了岩相学观察,显微测温工作,并结合相应相图分析研究——主要对合成包襄体的低温熔融行为进行探讨。结果表明合成的包裹体捕获了既定组成的流体,其低温相变过程与相应相图吻合。因此,人工合成流体包裹体与天然包裹体相似,天然流体包襄体的各种行为可以参照人工合成流体包裹体;同时,通过人工合成流体包裹体校正补充实验相图,使其更准确的被应用于天然包襄体测定分析。     

基于卫星编队InSAR时间同步对系统性能影响分析

基于卫星编队的InSAR系统是一个多基雷达系统，依靠卫星编队构型形成干涉所需的基线。系统在一发多收的工作模式下，协同工作的雷达间必须建立时间同步、相位同步和空间同步。本文根据卫星编队条件下InSAR高程测量的要求，对时间同步的要求进行了研究，在此基础上，分析了时间同步对InSAR系统性能的影响。     

The effects of soil moisture on synthetic aperture radar delineation of geomorphic surfaces in the Great Basin, Nevada, USA

RADARSAT-1 synthetic aperture radar (SAR) images from the western Great Basin, North America are used to map geomorphic features using environmental data (increased soil moisture), differences in incidence angles and ascending/descending satellite passes. These attributes are shown to increase the ability to delineate subtle geomorphic features along old shorelines. The change in moisture and the temporal resolution of the images provides a unique opportunity to use moisture as a geomorphic mapping tool in addition to traditional techniques such as image texture and the size and shape of the image features.     

辽宁地区前兆异常模糊综合指标与地震的关系研究

本文全时域扫描了辽宁地区70年代以来的前兆资料，提取异常，统计地给各异常加权，运用模糊综合方法算出本区前兆异常模糊综合值，并归一化，结合该区的强震事件，给出了辽宁地区强震危险性的前兆异常模糊综合判定指标。     

合成孔径雷达干涉测量技术（InSAR）及其对城市遥感的意义

该文详细论述与分析了合成孔径雷达干涉测量（InSAR)的干涉几何特征及InSAR影像之间的相关性特征，着重阐述并分析了影响其地学监测方面的数据质量等相干技术问题，就InSAR开展上海城市地面沉降研究提出了基本思路，对InSAR城市遥感应用的潜在意义进行了分析和讨论。     

Amplification of strong ground motion in the city of Zagreb, Croatia, estimated by computation of synthetic seismograms

A hybrid technique consisting of modal summation and subsequent finite differences modelling is applied for the computation of synthetic accelerograms along a profile crossing the city of Zagreb, the capital of Croatia. Assuming the source geometry is known, the amplification properties of the underlying soil may be determined by comparison of synthetics and their response spectra computed for a bedrock model with the ones obtained under the assumption of a realistic laterally varying local model. The peak ground acceleration is larger by a factor of up to 3.5 than the value obtained for the bedrock model. The amplification of the response spectra is most prominent for frequencies below 2 Hz, and increases sharply to the SW from the mapped fault running through the centre of the city.