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1.
对 T E极化和 T M 极化情况下高阻和低阻基底垂直断层进行了研究,首先从理论上对断层的 T E极化的 M T电磁响应进行了数学推导,得到了解析表达式。对四种情况进行了编程计算,得到了大量图件,然后对图件进行了详细分析,总结出了断层的 M T 响应的诸多特征,最后指出了如何应用于 M T 资料的解释中。  相似文献   

2.
给出了钻塔的定义,对各种钻塔进行了分类,详细分析了钻塔设计的基本参数,系统总结了各种钻塔特点和统一编号问题,简要介绍了钻塔设计计算和优化以及新型的钻塔发展趋势。  相似文献   

3.
甘肃的第四系   总被引:13,自引:2,他引:13  
在全面系统分析、整理第四纪地层资料基础上,以岩石地层为基础,以古地磁、14C、热释光测年资料为依据,以化石资料为参考,对更新统及全新统进行了岩石地层、磁性地层单位的对比和划分;重新厘定了一些地层单位的名称和含义;统一了各地层区的地层系统;建立并进一步完善了甘肃第四纪地层层序。确定了兰州、陇西及陇东地区黄土的开始沉积时间。对甘肃第四系的动物群及新构造运动的特征进行了论述。  相似文献   

4.
地下开采所引起的地表沉陷灾害是我国高速公路建设中所面临的一个新的课题.文章论述了条带煤采空区所引起的地表沉陷对高速公路建设的影响,建立了相关灾害的研究程式和研究方法,并利用研究成果进行了实例应用,取得了良好的效果.  相似文献   

5.
工控软件的抗干扰设计的编程技术   总被引:2,自引:0,他引:2       下载免费PDF全文
文章阐述了工业现场、高压电力环境中干扰的特点,并详细介绍了工控软件抗干扰设计的方法.  相似文献   

6.
陈汉江 《河南地质》2013,(11):54-55
公元二零一三年的春天与以往不同,一个名词“中国梦”飞速走红! 它旋即进入了中国高层的思维和决策也迅速飞进了每个中国人的脑海与心中!  相似文献   

7.
齐铁军 《矿产与地质》2006,20(4):556-559
地下开采所引起的地表沉陷灾害是我国高速公路建设中所面临的一个新的课题。文章论述了条带煤采空区所引起的地表沉陷对高速公路建设的影响,建立了相关灾害的研究程式和研究方法,并利用研究成果进行了实例应用,取得了良好的效果。  相似文献   

8.
以CT图像资料为例,利用物理特征值分析和裸眼观察法分别对岩土材料损伤出现的时间进行了估计,证明单纯观察判断的局限性,随后利用等值线法确定了损伤出现的位置和扩展的方向,接着通过对试样区CT数的最大、最小值随加载变化曲线进行考察,确定了无损区、损伤区和破裂区的分区界限值,在该阈值下对各区进行了图像的二值化,最后对二值图进行了形态、几何和物理特征值的定量化描述。  相似文献   

9.
本文概略介绍了花岗岩成因的研究现状,综述了花岗岩“成因分类”、花岗岩与板块构造的关系以及判别其形成环境的一些方法,并扼要介绍了花岗岩的物质来源问题。  相似文献   

10.
改进的有自由面渗流问题的Bathe算法   总被引:5,自引:2,他引:5  
郑宏  戴会超  刘德富 《岩土力学》2005,26(4):505-512
建议了一个新的有自由面渗流问题的变分不等式提法,该提法通过将潜在出渗面上的边界条件提为Signorini型条件,从而从理论上消除了出渗点的奇性,解决了出渗点的定位问题。同时在离散求解时,通过引进依赖于网格参数的连续型Heaviside函数,克服了Bathe算法中所固有的网格依赖性,提高了这类方法的数值稳定性。  相似文献   

11.
我院在我省水利信息化建设中应如何发挥作用   总被引:2,自引:0,他引:2  
水利信息化是水利行业走向现代化的措施和手段,水利信息化是一个系统工程,不仅涉及的部门多,业务范围广,而且技术复杂、投资大。我院应该充分利用自己的优势,深入开发和广泛利用水利信息资源,积极参与水利信息化建设,为我省的水利信息化建设作出自己的贡献。  相似文献   

12.
综合介绍了信息高速公路及国家空间信息基础设施的基本情况、地理科学的信息化和地理信息系统的发展趋势和特点,并说明了信息高速公路对地理科学信息化及地球科学研究及应用的影响。  相似文献   

13.
本文结合实际分析了信息化建设的背景和发展现状,提出了信息化建设的目标和内容,并概括了几点体会。  相似文献   

14.
从信息技术的角度看,工程勘察实际上是一种“信息获取、信息理解和信息应用”的过程。作为一项技术和服务,工程勘察的信息化应由工程勘察业务信息化和工程勘察管理信息化两方面组成。工程勘察信息化的作用包括信息化辅助业务和管理、信息化支撑业务和管理以及信息化提升业务和管理三个层次。当前,有必要对工程勘察企业信息化的模式、工程勘察业务信息化提升的方式和工程勘察信息化的标准化等问题做进一步研究,以推动工程勘察信息化向深度和广度发展。  相似文献   

15.
Comparative evaluation of landslide susceptibility in Minamata area, Japan   总被引:6,自引:0,他引:6  
Landslides are unpredictable; however, the susceptibility of landslide occurrence can be assessed using qualitative and quantitative methods based on the technology of the Geographic Information Systems (GIS). A map of landslide inventory was obtained from the previous work in the Minamata area, the interpretation from aerial photographs taken in 1999 and 2002. A total of 160 landslides was identified in four periods. Following the construction of geospatial databases, including lithology, topography, soil deposits, land use, etc., the study documents the relationship between landslide hazard and the factors that affect the occurrence of landslides. Different methods, namely the logistic regression analysis and the information value model, were then adopted to produce susceptibility maps of landslide occurrence. After the application of each method, two resultant maps categorize the four classes of susceptibility as high, medium, low and very low. Both of them generated acceptable results as both classify the majority of the cells with landslide occurrence in high or medium susceptibility classes, which could be believed to be a success. By combining the hazard maps generated from both methods, the susceptibility was classified as high–medium and low–very low levels, in which the classification of high susceptibility level covers 6.5% of the area, while the areas predicted to be unstable, which are 50.5% of the total area, are classified as the low susceptibility level. However, comparing the results from both the approaches, 43% of the areas were misclassified, either from high–medium to low–very low or low–very low to high–medium classes. Due to the misclassification, 8% and 3.28% of all the areas, which should be stable or free of landsliding, were evaluated as high–medium susceptibility using the logistic regression analysis and the information value model, respectively. Moreover, in the case of the class rank change from high–medium susceptibility to low–very low, 35% and 39.72% of all mapping areas were predicted as stable using both the approaches, respectively, but in these areas landslides were likely to occur or were actually recognized.  相似文献   

16.
本文从企业信息管理规章制度建设在企业管理中的地位、作用、构架以及分类等几个方面进行阐述,并着重强调其对企业发展的重要性.  相似文献   

17.
本文阐述了设计企业对电子资料管理平台建设的认识和需求,以及电子资料库的建设和利用给企业知识积累带来的积极应用效果。  相似文献   

18.
关于建立信息地理学的讨论   总被引:2,自引:1,他引:2  
从信息地理学产生的时代背景入手,先后讨论了信息地理学的基本概念和特点,信息地理学的研究内容及方法,信息地理学的基础理论问题等,最后展望了信息地理学的发展前景及潜力。  相似文献   

19.
This paper is concerned with the relationship between safety and mobile phones with particular reference to Sub-Saharan Africa; and looks at a range of geographical contexts: non-violent, conflict and post-conflict situations. The main part of the paper reports on recent findings of extensive field-work into the use of mobile phones in 11 countries in Sub-Saharan Africa. The findings are important partly because from a welfare view, it is use rather than mere adoption that generates actual benefits to consumers. What the survey finds is that use of the mobile phone is mainly for safety-related purposes and that the countries that fare highest in terms of usage are drawn from the richest and poorest members of the sample. In explaining these results I draw heavily on the relationships and interactions between poverty, inequality and crime. For example, the dominance of Southern African countries is ascribed to their exceptionally high levels of inequality, which, in turn, are due partly to the unequal effects of resource abundance.  相似文献   

20.
In a media saturated world of globalization, information flow and knowledge economies, an interesting paradox exists: geographic literacy appears to be on the decline while geographic information is on the rise. In this introduction to a collection of essays on geographies of the media, we explore this paradox and use Baudrillard’s (1994) work on Simulacra and Simulation to argue that increased mediated information does not produce more meaning, but rather leads to a catastrophe of meaning and the medium. Drawing from McLuhan’s axiom, “the medium is the message,” we posit that with more mediated information there is less meaningful information and as such we need to address geographic media literacy as a primary mode through which to address geographic literacy.
Jim CraineEmail:
  相似文献   

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