防震减灾一线技术应用型人才培养工作的进展

本文通过对防震减灾一线技术岗位人才需求状况的分析,阐述了防灾技术高等专科学校近年来专业建设及发展状况,以及面向监测预报、震灾防御、应急救援岗位设置的专业的培养目标、开设的课程及毕业生的业务规格等。     

Seismic Monitoring Network and Seismic Activities in Thailand

The details of seismic monitoring network and seismological work in Thailand,including some information on felt earthquakes that occured from 2000 to August 2001,are reported here.     

Substructure Method of Three-Dimensional Semi-Analytic Boundary Element and Its Application to Seismic Scattering of Hill Topography

In this paper,a substructure method of three-dimensional semi-analytic boundary element is established.The seismic scattering by three-dimensional topography of a hill can be analyzed by the method in frequency domain.Using this method,the computational effort and storage space are reduced considerably.Finally,analytic results are given.     

基于锥束CT的小型部件检测系统设计

利用锥束CT成像的先进理论,设计了一套小型部件检测的系统。该系统能对单个小型部件进行检测,检测时间短,成像分辨率高,并能最终实现三维显示;该装置具有小型化和可移动性的特点,能用于野外作业。     

塔河油田普查地下淡水的地球物理工作模式

本文阐述了在塔河油田地下淡水普查工作过程中建立和应用的地球物理方法的工作模式。论述了建立工作模式的原则和应用效果,并提出了利用新技术找水的建议。     

Local variations of solifluction activity and environment in the Abisko Mountains,Northern Sweden

Seven sites within the mountain region of Abisko, northern Sweden, were selected for measurement of solifluction movement rates and correlation with the local environmental factors. Grids with sizes from 20 m × 30 m to 50 m × 100 m included both solifluction landforms and adjacent ground. Positions of movement markers and the terrain were recorded and the grid areas were digitally reconstructed. This allowed topography, vegetation and soil texture (fraction of fine material) surfaces to be interpolated and used together with data on soil moisture in statistical analyses. Significant correlations differ from site to site indicating that environmental factors have varying importance and inter‐relations depending on the local setting. Geomorphic work was also assessed within the grids. The results indicate measurable geomorphic work where no landforms are present. These areas may make larger contributions to sediment displacement than where solifluction landforms exist. Solifluction is an important denudational agent in the region and has its greatest impact on landscape development in the western part of the region. Copyright © 2011 John Wiley & Sons, Ltd.     

Stratigraphic coordinates: a coordinate system tailored to seismic interpretation

In certain seismic data processing and interpretation tasks such as spiking deconvolution, tuning analysis, impedance inversion, and spectral decomposition, it is commonly assumed that the vertical direction is normal to reflectors. This assumption is false in the case of dipping layers and may therefore lead to inaccurate results. To overcome this limitation, we propose a coordinate system in which geometry follows the shape of each reflector and the vertical direction corresponds to normal reflectivity. We call this coordinate system stratigraphic coordinates. We develop a constructive algorithm that transfers seismic images into the stratigraphic coordinate system. The algorithm consists of two steps. First, local slopes of seismic events are estimated by plane‐wave destruction; then structural information is spread along the estimated local slopes, and horizons are picked everywhere in the seismic volume by the predictive‐painting algorithm. These picked horizons represent level sets of the first axis of the stratigraphic coordinate system. Next, an upwind finite‐difference scheme is used to find the two other axes, which are perpendicular to the first axis, by solving the appropriate gradient equations. After seismic data are transformed into stratigraphic coordinates, seismic horizons should appear flat, and seismic traces should represent the direction normal to the reflectors. Immediate applications of the stratigraphic coordinate system are in seismic image flattening and spectral decomposition. Synthetic and real data examples demonstrate the effectiveness of stratigraphic coordinates.     

SZGC—93型数字工程地震仪

ＳＺＧＣ－９３型数字工程地震仪是专为工程地震勘探而研制的。经过两年多的实际生产使用表明：该仪器精度高、性能稳定、操作方便。是一种实用性较好的野外专用设备。本文介绍了它的组成：论述了其各个单元电路的工作原理及主要技术指标;最后说明了该设备两年多来的实际应用成果。     

区域市级地震联防工作实践与思考

对晋陕豫地震联防区34年的工作实践进行了回顾总结,针对地震联防联动工作中存在的问题和不足,提出要进一步完善工作章程,建立监测网络,健全应急联动机制,促进区域合作与信息共享等对策建议,切实提高区域地震联防和应急联动能力。     

天津市地震前兆台网运行、产出与管理

对天津市地震前兆台网系统运行、产出与应用、技术管理工作进行了综述,畅谈了几点工作体会,以及面临的困难。在以后的工作中,天津市地震前兆台网还需不断加强责任意识、服务意识和创新意识,在汇集存储、质量监控、技术保障、异常核实、科学研究中发挥重要的作用,为将来解决地震预报难题夯实基础。