焦作矿区底板突水预报模型     

陈朝阳  李德安 《煤田地质与勘探》1996,24(5):36-39

选取对突水有影响的地质因素，如构造、矿压、构造裂隙、断层断距、断层至突水点距离、隔水层厚度、水压等为自变量，以突水点及未突水点的这些资料为基础，用数量化理论（Ⅰ、Ⅱ）的方法，将定性变量数量化，并参与计算，建立了焦作矿区底板突水的定量预报模型。经检验表明，所建模型可靠，可用于实际预测  相似文献   

On the unified theory of atmospheric particle systems part ii: self–affine particles     

Liu Yangang 《大气科学进展》1997,14(3):369-388

As the second attempt at unifying treatment of atmospheric particle systems, this paper further examines shape characterization of atmospheric particles. First, to support the theoretical framework developed in Part I, methods for studying non-spherical particles are reviewed. It is argued that these different methods can be unified under fractal geometry through the generalized power laws given in Part I. Empirical power-laws for hydrometeors scat-tered in literature since 1935 are summarized and reevaluated in terms of fractals. Second, generalization from self-similar to self-affine particles is discussed. Self-affinity of atmospheric particles is exemplified by examining the exponents in the power laws between the length along a- and c-axis of ice crystals. It is argued that unlike Euclidean and self-similar particles, self-affine particles do not have a simple dimensional relation between original particles and their projections; the relation for projection of self-similar particles and Mandelbrot’ thumb rules for intersection respectively set the lower and upper bound. Using published data, self-affine particles are shown to exist in the at-mosphere. The existence of self-affine particles in turn calls for instruments that can simultaneously measure mass, area and maximum diameter (or their equivalents).  相似文献   

Lithofacies palaeogeography of the Cambrian in Tarim area     

Feng Zengzhao  Bao Zhidong  Wu Maobing  Jin Zhenkui  Shi Xiaozhang 《Frontiers of Earth Science》2007,1(3):265-274

The Tarim area in this paper refers to the present Tarim Basin and its surrounding mountains, bounded on the north by the Middle Tianshan Mountains, on the south by the Kunlun Mountains, on the west by the national boundary of China, and on the east by the Altun Mountains. It covers an area of more than 1 000 000 km². Based on the quantitative and qualitative data from the stratigraphy and petrology of outcrop and well sections, and according to the single factor analysis and multifactor comprehensive mapping method, the single factor maps of the Lower, Middle and Upper Cambrian, and the lithofacies palaeogeography maps of the Early, Middle and Late Cambrian of the Tarim area, are compiled. The most important character of these lithofacies palaeogeography maps is quantification, i.e. the determination of each palaeogeography unit based on accurate quantitative data and the quantitative single factor maps. The study marks the first time that this quantitative method has been applied in the Tarim area. In the Early Cambrian, the present Tarim Basin was mainly a carbonate platform, in which there were penebank, dolostone flats, and gypsum-halite lake. The South Tianshan Basin and East Tarim Basin were siliceous rock-limestone-mudstone basins. The Kunlun Platform was situated in the south, where there were two small lands. The Altun Land was situated in the southeast. In the Middle and Late Cambrian, the framework of lithofacies palaeogeography was similar to that in the Early Cambrian; the land area was gradually reduced; the basin area was enlarged; while the Tarim Carbonate Platform changed little. The transgression continued from the Early Cambrian to the Late Cambrian. Translated from Journal of Palaeogeography, 2006, 8(4): 427–439 [译自: 古地理学报]  相似文献   

图像处理在X射线胶片缺陷识别中的应用     

原培新  孙岩  陈波  纪革 《CT理论与应用研究》2007,16(1):49-53

本文针对油气管道焊缝射线检测胶片的实际情况,提出一种用于气孔缺陷检测的方法,应用数字图像处理技术对气孔缺陷进行量化分析,并实现计算机辅助评片.  相似文献   

塔里木地区奥陶纪岩相古地理   总被引：6，自引：5，他引：6  

冯增昭  鲍志东  吴茂炳  金振奎  时晓章  骆艾荣 《古地理学报》2007,9(5):447-460

本文是《塔里木地区寒武纪岩相古地理》一文的延续。塔里木地区是以当今的塔里木盆地为主体并包括其周边山地的广大地区，北至中天山，南至西昆仑山，西至我国国界，东至阿尔金山，面积逾100万km2 。在98个露头剖面和钻井剖面的各种单因素定量及定性资料的基础上，采用单因素分析多因素综合作图法，编制出了塔里木地区奥陶系下奥陶统两河口阶和红花园阶、中奥陶统大湾阶和牯牛潭阶、上奥陶统庙坡阶、上奥陶统宝塔阶、上奥陶统临湘阶和五峰阶5个作图单位的各种单因素图，并在此基础上编制出了相应的5个地质时期的岩相古地理图。这些岩相古地理图的最主要特征是定量，即每个古地理单元的划分和确定都有确切的定量资料及定量单因素图为依据。这种定量的岩相古地理图在塔里木地区还是首次出现。在早奥陶世两河口期和红花园期，塔里木地区主要是碳酸盐台地，其中散布着各种滩。其北部为南天山盆地，东部为塔东盆地，南部为西昆仑台地，其东侧为东昆仑台地和柴达木台地。无陆地和云坪，盆地面积相当大。这与该地区寒武纪的岩相古地理格局大不相同。这表明早奥陶世的海进比寒武纪的更甚了。中奥陶世大湾期和牯牛潭期的岩相古地理面貌与两河口期和红花园期的相似，但南天山盆地西部扩大了，从而形成了柯坪盆地。这是一个重要变化。庙坡期的古地理面貌与大湾期和牯牛潭期的相似，但滩少了，这标志着海进又发展了且可能到达了盛期。至宝塔期，在塔里木台地的东南部，碎屑岩发育，这是塔里木碳酸盐台地向碎屑岩台地变化的预兆，是海退的标志。到晚奥陶世的临湘期和五峰期，塔里木台地基本上变成了1个碎屑岩台地。这是一个重大变化。这标志着塔里木地区寒武纪和奥陶纪海进海退旋回的终结。  相似文献   

GIS中线元不确定性的综合量化   总被引：5，自引：0，他引：5  

蓝悦明  陶本藻 《武汉大学学报(信息科学版)》2003,28(5):559-561

研究了矢量GIS中数据不确定性与模型不确定性的综合影响，提出了其综合不确定性的量化方法，表明了数据不确定性与模型不确定性的综合影响是可以量化的。  相似文献   

新汶矿区协庄矿11煤层瓦斯含量预测     

徐平 张子戌刘勇  王小明 《中国煤田地质》2004,16(3):18-19,22

分析了协庄矿11煤层已采区30个煤样的瓦斯含量及其等值线图，以数量化理论Ⅰ为建模工具，运用Visual C 6．0编制了瓦斯含量预测软件，对未采区瓦斯含量进行了预测，绘制了未采区的瓦斯含量等值线图。对于指导矿井的通风设计和采掘部署，有重要的理论和实际意义。  相似文献   

A database for worldwide seismicity quantification     

Edouard Schmid  Werner Schaad 《Natural Hazards》1995,12(2):153-160

The first step in a seismicity analysis usually consists of defining the seismogenic units, seismic zones or individual faults. The worldwide delimitation of these zones involves an enormous effort and is often rather subjective. Also, a complete recording of faults will not be available for a long time yet. The seismicity model presented in this paper therefore is not based on individually defined seismic zones but rather on the assumption that each point in a global 1/2° grid of coordinates represents a potential earthquake source. The corresponding seismogenic parameters are allocated to each of these points. The earthquake occurrence frequency, one of the most important parameters, is determined purely statistically by appropriately spreading out the positions of past occurrences. All the other significant seismicity characteristics, such as magnitude-frequency relations, maximum possible magnitude and attenuation laws including the dependence on focal depth are determined in a global 1/2° grid of co-ordinates. This method of interpreting seismicity data allows us to establish a transparent, sufficiently precise representation of seismic hazard which is ideally suited for computer-aided risk analyses.  相似文献   

地震活动性定量化研究的评述     

魏富胜 《地震地磁观测与研究》1993,14(2):42-48

简要回顾了地震活动性定量化研究的进程,概述了各综合定量指标参量的特点,介绍了地震活动度 S 及其在定量描述地震活动性中的某些应用成果,展望了 S 应用于地震监测预报中的可能性。  相似文献   

断层活动性定量评定之现状与展望   总被引：1，自引：0，他引：1  

李起彤 《国际地震动态》1994,(5):1-5

随着活断层理论研究的深入和工程评价要求的提高，对断层活动性仅作定性评价，已不能满足重大工程选址和设计的要求，而必须走量化评定的道路。作者分析了断层活动性定量评定之现状，科学京、工程师们虽已做了一些有益的尝试和实践，但当前仍处在探索研究阶段，至今尚未找到一个能被普遍接受的断层活动性量化评定标准。作者对断层活动性量化评定之前景亦做了展望，并着重指出几个今后应特别予以注意的问题：１．明确断层活动性的概念含义；２．找到影响断层活动性大小的主要因素；３．加强断层活动年代测定研究；４．重视活断层的地震活动和地表破裂研究；５．用概率论方法定量评定断层活动性。  相似文献