井外爆炸点源激发井孔声波场

利用井外爆炸点源激发的声波场与井孔的相互作用模拟井间地震的物理过程,推导了全频域井孔内外声波场的理论计算公式,并针对不同震源主频、不同源距(震源到井轴的径向距离)和软硬地层进行了井内声场的全波模拟与频率-相速度分析。结果表明:井外爆炸点源激发井孔内外的声场等效于无穷多级声场迭加的结果;震源靠近井壁时的频率-相速度图与震源在井内时相似;震源的主频越高、源距和接收器离井轴的径向距离越大、地层越硬,则顾及的多级声场的项数就要越多;震源主频越低、源距越小,井中激发的斯通利波则越强。     

用VB语言实现地震动态演示

Ｖ Ｂ 编程语言提供了图形环境,能可视化的设计窗体和控件。本文介绍了应用该设计语言的特性如何实现地震资料的动态显示过程。     

Evaluation of Earthquake Losses and Establishment of a Corresponding Database System

After the Datong-Yanggao earthquake (October 1989),a special team was organized for the first time by the SSB of China to start the work of earthquake damage evaluation for the purpose of providing the government with a scientific basis for disaster relief.The result of the evaluation played an important role in speeding up rehabilitation and reducing damage losses in the earthquake area.Based on the evaluation of earthquake damage from the Datong-Yanggao earthquake and recent research results,this paper presents a method for quick evaluation of earthquake damages,introduces software entitled EDEP (earthquake damage evaluation program) for evaluating earthquake damage,and cites a case to explain the main function and application of the EDEP.Finally,for a quicker evaluation of earthquake damages,the paper also proposes the establishment of database systems of earthquake damage evaluation in the emphatically monitored areas and ways to build up such database systems.     

Continental- Margin Structure of Northeast China and Its Adjacent Areas

The continental margin of Northeast China and its adjacent areas is composed of two tectonic belts. The inner belt is a collage made up of fragments resulting from breakup of an old land with the north part related to the evolution of the Palaeo-Asian Ocean and the south part to the evolution of the Palaeo - Pacific Ocean. The outer belt is a Mesozoic terrane, which is a melange made up of fragments of the Late Palaeozoic to Early Mesozoic oceanic crust and the Late M esozoic trench accumulations.There existed another ocean-the Palaeo - Pacific Ocean during the period from the closing of the Palaeo-Asian Ocean to the opening of the modern Pacific Ocean or from the Devonian to Jurassic, and the ocean-floor spreading of the Palaeo - Pacific Ocean led to the formation of the above-mentioned tectonic belts. The development of the strike-slip fault system after the Late Jurassic and the formation of an epicontinental volcano -plutonic rock belt in the Late Cretaceous to Early Tertiary are attributed to the i     

大庆台网观测效果分析与振动事件研究

应用周期－频度谱和复查分析等方法对大庆台网观测资料进行详细研究，从而取得了对台网的监测能力，其些小事件的性质等问题的明确认识。     

Classification of Structure Vulnerability and Evaluation of Earthquake Damage From Future Earthquakes

In this paper,three problems are studied and their results are presented as follows:(1)classification of seismic vulnerability for existing buildings,(2)dynamic earthquake damage matrix analysis method of buildings,and(3)earthquake damage matrix of building in the year 2000.     

Intelligence-Aided Seismic Zonation System IASHES

In this paper,the structure of the intelligence-aided seismic zonation system IASHES and its validation are briefly introduced.Emphasis is placed on the two rank scheme of potential seismic source areas; an expert subsystem for estimating the seismicity trends of rank A source areas; an expert subsystem for delineation of rank B source areas; an expert subsystem for judgment of upper limit of magnitude of rank B source areas,and an improved procedure for determination of weighting factors of rank B source areas,which is specially suitable to ES(Expert systems).     

黑龙江省虎林市幅重磁场特征及其地质解释

以区域地质资料和物性资料为依据，对黑龙江省虎林市幅重磁场特征进行了综合分析。根据航磁△T异常以及布格异常平面等值线展布特点，对该区的杂乱磁场区、线性磁场区和平稳磁场区进行了相关的地质解释，描述了30条断裂构造带及其重力场特征；结合重力异常和航磁异常等综合资料，按结晶基底起伏形态，将虎林盆地划分为4个隆起、3个凹陷共7个构造单元。     

近场强地震动模拟中对破裂的方向性效应和上盘效应的表达.

为了模拟近场强地震动，采用了基于有限断层模型的一种随机合成方法．震源破裂面被剖分成一定数量的子源，总的地震矩分成数量更多的子震的矩．一给定子源中一次子震引起的场地地震动的傅氏谱，通过考虑点源的谱、随着距离的衰减、能量耗散及近地表效应等导出．据此幅值谱和一个随机相位谱，并与一个时程包络函数结合，合成一个子震时程．将各子源中各个子震引起的所有时程叠加，得出场地的地震动时程．叠加中，各子震时程之间的时滞，据子震发震时差和子源至场地的距离差别引起的时差确定．对一个设定地震，选用4个断层面倾角，计算了近场21个地点的地震动．结果表明，本文方法可以很好地表达破裂的方向性效应和上盘效应．为了验证方法的可靠性，对1994年美国北岭地震中3个近断层台站MCN，LV3和PCD模拟的地震动与实际记录的加速度反应谱和时程作了比较．      

黑龙江省国土资源遥感影像数据库系统相关技术研究

本文介绍了黑龙江省国土资源遥感影像数据管理系统的相关功能,并对实现这些功能所采用的空间数据引擎技术、遥感影像金字塔技术进行了分析与探讨。