电视测井中的图象处理问题   总被引：5，自引：3，他引：2  

王理  范永全  沙椿 《物探化探计算技术》2000,22(3):238-244

电视测井采集到的原始视频图象经过几何空间变换,图像象素重采样,最终生成可供地质分析解释的井壁表面图象文件。此外,必须动态识别指北针的图像以确定井下探头的方位,并以识别的北方位为起点守成图象的几何空间变换。基于井场施工效率和井下探头的安全原因,探头井中以４ｃｍ／ｓ左右的速度下落,图像处理过程必须与探的落保持同步,因而还具有一定程度的实时性要求。  相似文献   

中国西部复杂地区地震资料处理   总被引：8，自引：2，他引：6  

屈智华  叶秋焱  刘旺 《物探与化探》2000,24(1):43-50

针对戈壁、沙丘地区地震资料的特点,通过对原始资料进行质量控制、高通滤波、倾角滤波、野外静校正、地表一致性反褶积、精细速度分析、叠前去噪、剩余静校正多次迭代、叠后去噪和偏后修饰等处理,提高了低信噪比地区地震剖面的资料质量,摸索出了一套戈壁、山前、沙丘等复杂地区地震资料处理技术。通过对青海、新疆地区资料进行实际应用,证明该资料处理技术实用可靠,效果显着。  相似文献   

构造形成时限测定方法的探索   总被引：6，自引：0，他引：6  

刘德良  曹高社  杨晓勇  方国庆 《地球科学进展》2000,15(4):467-469

地质作用过程持续时间的确定具有重要意义。前人已建立的地质定年方法(同位素法、古生物法和古地磁法)给出的是地质事件的“绝对年龄”或相对年代。但至今国内外尚缺乏有关地质作用持续时间的直接的测定方法。讨论了从构造地质学角度直接测定地质事件时限的一种新方法。  相似文献   

金刚石-cBN-硬质合金复合柱齿的理论分析   总被引：2，自引：0，他引：2       下载免费PDF全文

马保松  张祖培 《地球科学》2000,25(3):329-332

通过多种分析手段对所研制的金刚石-立方氮化硼(cBN) -硬质合金超硬复合柱齿进行了深入的研究分析, 得出了由于B的烧结促进和强化作用、Ni-P的活化烧结作用以及cBN加入, 大大提高了超硬复合柱齿的性能, 同时还分析指出, 在金刚石与基体合金之间存在过渡区, 该过渡区能有效地保护金刚石免受高温损伤, 另外, 该过渡区还大大增强了基体与金刚石之间的结合强度.   相似文献   

用内蕴时间理论进行土流变本构方程研究          下载免费PDF全文

李建中??曾祥熹 《探矿工程》2000,(2):1-3

利用内蕴时间理论对土的流变性进行了理论研究。提出了在准三轴条件下土的流变本构方程 ,并且利用土的三轴流变试验结果对所得土流变本构方程进行了验证。验证结果表明用内蕴时间理论推导的土流变本构方程能很准确地描述土的流变性。  相似文献   

Site effects at Euroseistest—I. Determination of the valley structure and confrontation of observations with 1D analysis     

D Raptakis  F.J Chvez-Garc&#x;&#x;a  K Makra  K Pitilakis 《Soil Dynamics and Earthquake Engineering》2000,19(1):411

This paper describes the process of construction of the 2D model of Volvi's geological structure and results of empirical and theoretical approaches to the evaluation of site response at Euroseistest. The construction of the 2D model is based on a re-interpretation of the available geophysical and geotechnical data in an effort to improve the definition of the subsoil structure at Euroseistest in terms of the most important parameters needed to model site response. The results of this re-interpretation are compared with a previous published 2D model of the same alluvial valley. Different analysis of the measurements and different criteria in the synthesis of data have led to a different model, even if both studies had access to the same field measurements. This underscores the fact that a model results of an interpretation and is not uniquely determined by the data, no matter how detailed they are. The well known subsoil structure opened the possibility to correlate the geometry and the dynamic properties of the 2D model with the results of site response determined from a detailed analysis of two events in frequency and time domains and 1D numerical modeling. The study of site response shows the important effect of the lateral variations on the ground motion and suggests that the contribution of locally generated surface waves to the resonant peak may be important. In the case of Volvi's graben, the limitations of the 1D approximation to simulate ground motion under complex soil conditions in both frequency and time domains are also shown. This paper lays the ground for a companion article dealing with 2D site effects in this basin.  相似文献   

载波相位差分技术在馈源舱动态定位中的应用   总被引：1，自引：0，他引：1  

王文利  段宝岩 《测绘学报》2000,29(1):89-92

针对ＦＡＳＴ项目馈源舱扫描跟踪设计,作者根据ＧＰＳ载波相位差分精密动态定位原理,讨论了馈源舱位置和姿态的ＧＰ动态检测系统的组成,按照我国贵州ＫＡＲＳＴ地形的地理位置给出了动态检测时需要使用的馈源舱位姿转换矩阵和求解方程,与ＧＰＳ动态定位系统相结合就可以完成对馈源舱位姿的跟踪检测,实现舱体的闭环控制。  相似文献   

应用人工神经元网络方法识别近震与远震   总被引：3，自引：0，他引：3  

李慧婷  黄文辉  陈贵美 《华南地震》2000,20(4):71-75

利用人工神经元网络方法,提出了一种在实时系统中识别近震与远震的算法,并用广东省台网记录的地震波形数据进行训练和测试。结果表明,该算法能准确可靠地识别远、近震,可以应用于台网的实时处理系统。  相似文献   

Adventures in Data Analysis: The TAO Array and the 1997–1998 El Ni?o     

Stephen K. Boss 《Mathematical Geology》2000,32(2):159-185

Traditional undergraduate education in earth sciences does not emphasize data acquisition, analysis, or assessment. However, arrival of the information age dictates that earth sciences graduates be imbued with fundamental skills to organize, evaluate and process large data sets. Fortunately, the proliferation of remotely sensed data and its availability via the Internet provides many opportunities for earth science educators to meet these needs. Exercises to introduce students to data analysis have been designed utilizing data from the Tropical Atmosphere–Ocean (TAO) Array and the 1997–1998 El Niño episode in the tropical Pacific Ocean. The TAO Array is a grid of 69 buoys moored across the equatorial Pacific Ocean (8°N to 8°S and 95°W to 143°E) recording environmental data relevant to El Niño—Southern Oscillation (ENSO) processes. Data from the TAO Array is available in near-real-time (http://www.pmel.noaa.gov/toga-tao/realtime.html) or as archived ASCII files (http://www.pmel.noaa.gov/toga-tao/data-delivery.html) providing daily (sometimes hourly) records of environmental parameters for each buoy in the grid. Student exercises in data analysis begin with downloading data from buoy locations, parsing the data into spreadsheets, and organizing data by environmental parameter into yearly and monthly data sets. Analyses of reconstructed data include calculations of long-term averages of environmental parameters, seasonal climatologies, monthly climatologies and calculation of long-term, seasonal, and monthly anomalies. Finally, monthly anomaly maps produced by students are loaded sequentially into GIF-animation software to create time-series images illustrating the progress and development of the 1997–1998 El Niño event.  相似文献   

DZ-1型地质灾害土层含水量监测仪系统的研究与应用          下载免费PDF全文

陈文俊  周策  汤国起 《探矿工程》2005,32(3):39-41

高强度降雨和岩土层含水量过高是山体滑坡等地质灾害的主要诱因，为了更好地对这类地质灾害进行有效预测预报，研制了DZ-1型地质灾害土层含水量监测仪，介绍了该监测仪的工作原理、主要构成、技术性能、监测工艺技术及实际应用效果。  相似文献