青海省玉树地区高精度航磁调查与应用研究          下载免费PDF全文

王牧  金世杰  要悦稳  习肖伟 《地质找矿论丛》2021,36(2):202-209

青海玉树地区位于我国重要的西南"三江"成矿带,具有高海拔、切割剧烈等特点,而高精度航磁调查是一种精度高、见效快、成本低的方法技术手段.在该区运用直升机长杆硬架技术并采取随地形缓起伏的方法,获取了高质量的原始数据.在高精度航磁图上,磁异常信息十分丰富,通过详细的物性资料分析和严谨的异常解释工作,摸清了区域磁场基本特征,推...  相似文献   

时变重力场球面模型反演算法和模拟实验     

张贝  陈石  李红蕾  杨锦玲  韩建成  卢红艳 《地震》2021,41(1):13-24

时变重力场是研究地球内部介质物性变化的重要手段.本文提出了一种适用于地面流动重力测量获得的时变重力信号的场源反演方法,该方法采用球坐标系下的六面体单元来模拟场源介质,适合大尺度地震流动重力测量数据的等效源模型构建.通过引入重力时变信号的一阶光滑先验条件,压制了时变重力信号中的短周期高频分量,可用于提取与地震孕育相关的长...  相似文献   

面向野外地质调查工作的道路提取方法研究     

高婷  黄颖  郭明强 《测绘工程》2021,30(2):13-16

为弥补传统的依靠管理组织、法律、经济、教育等进行对野外地质工作安全管理工作的不足,通过百度SDK采集GPS步行轨迹数据,基于单向GPS轨迹数据的特点,进行轨迹的分割分段处理.最后利用BP神经网络算法拟合道路,通过反复实验确定BP网络的参数配置信息.并以中国地质大学西区为研究区域,提取路网信息,验证算法的有效性和实用性....  相似文献   

水域地震映像在火成岩发育区的应用与探讨——以厦门某海底隧道勘察为靶区     

林松  王薇  罗登贵  金聪  邓小虎 《大地测量与地球动力学》2018,38(7):719-722

以厦门某海底隧道勘察为靶区，采用电磁气泡震源系统激发地震波，在火成岩发育区进行水域地震映像实验，较好地查明了海底水深界面、淤泥（砂层）和基岩面的分界线。实验结果表明，水域地震映像法对海域火成岩发育区是一种有效的物探方法，可以为海域地质勘察提供可靠的地质参考依据；利用水域地震映像勘探既可以较好地弥补钻探缺陷，又能极大地节约经济成本。  相似文献   

无人机航测技术在农地杂草识别中的应用     

谭远模 《北京测绘》2020,(4):514-517

杂草治理是农地质量保障的关键,杂草的精准识别与定位是杂草治理的重要保障,为提高杂草治理精度与效率,本文提出运用无人机航测技术辅助实现杂草治理工作。本文以广东DX农场为例,运用无人机航测技术进行农场航拍影像采集,运用实例证明无人机航测可以大幅提高数据采集效率和精度,并分别运用视觉判断法、神经网络模型法完成了杂草密度分析,输出杂草密度分布图,说明了无人机航测数据可以辅助实现杂草密度分析。通过对比分析,进一步论证了神经网络模型配合无人机航测技术,可以进一步提高杂草识别效率和精度。  相似文献   

The many faces of local community: Exploring lay conceptualizations of the Norwegian lokalsamfunn     

Sabrina Scherzer  Nina Gunnerud Berg  Haakon Lein 《Norsk geografisk tidsskrift. Norwegian journal of geography》2020,74(3):152-164

ABSTRACT

Despite much attention paid to the topic of community in academic literature and policy documents, there is a relative lack of knowledge about what laypersons perceive as a local community. Based on data from a national survey, the authors examine how c.1400 Norwegians conceptualized local community – lokalsamfunn in Norwegian. They reveal some of the linguistic and conceptual aspects of local community as a term, in addition to tendencies and patterns among the survey responses. The respondents’ conceptualizations contained references to lokalsamfunn variously as a geographical area, people and relations, activities and involvement, attachment to place and people, and provider of local goods and services. Their main emphasis was on lokalsamfunn as a spatial unit. However, the responses contained relatively few references to the relational aspects of lokalsamfunn. The authors conclude that a common, lay understanding may be that lokalsamfunn is a vaguely defined but limited geographical unit filled with people who to varying degrees know each other and interact. Concerning policymaking aimed at fostering communal well-being, the authors hold that any community-based programming requires intricate knowledge of the people who form the community, since without community interaction and a degree of social cohesion any envisioned programmes may not succeed.  相似文献   

The two micron all sky survey     

S. G. Kleinmann  M. G. Lysaght  W. L. Pughe  S. E. Schneider  M. F. Skrutskie  M. D. Weinberg  S. D. Price  K. Y. Matthews  B. T. Soifer  J. P. Huchra  C. A. Beichman  T. J. Chester  T. Jarrett  G. L. Kopan  C. J. Lonsdale  J. Elias  J. W. Liebert  P. Seitzer 《Experimental Astronomy》1994,3(1-4):65-72

This paper describes the design, expectations, and prototyping of a new allsky survey, called 2MASS (Two Micron All Sky Survey) to be carried out with the new generation of infrared array detectors.  相似文献   

用水准测量资料反演1990年青海共和地震的震源机制     

赵明  陈运泰  巩守文  王庆良 《大地测量与地球动力学》1992,(4)

利用地面垂直形变测量资料研究了1990年4月26日青海共和Ms6.9地震的震源机制。通过反演得出这次地震是由逆冲倾滑为主的断层错动引起的。该断层走向102°,倾向SW,倾角46°,长40km,宽9km,断层上部边界至地面的垂直距离3km,下部边界至地面的垂直距离10km。逆冲倾滑错距79cm,伴以错距5cm的左旋走向滑动。这是一次低应力降(3.8MPa)的板内地震,应变降为5.7×10~(-5),地震矩9.8×10~(18)N°m,能量释放5.0×10~(14)J。由反演得到的共和地震的震源机制与等震线的形态、余震的空间分布以及共和盆地断层交汇的特征总体上是一致的。  相似文献   

BOOK REVIEWS     

《The Professional geographer》1988,40(3):347-378

Books reviewed in this article: The Mexican Colonial Copper Industry. Elinore M. Barrett . The Control Revolution: Technological and Economic Origins of the Information Society . James R. Beniger . Land Degradation and Society . Piers M. Blaikie And Harold C. Brookfield , Eds . La carte, mode d'emploi. Roger Brunet . France: les dynamiques du territoire . Roger Brunet AND Jacques Sallois , EDS. At the Crossroads—The Mineral Problems of the United States . Eugene N. Cameron . A Census of One Billion People , Papers for International Seminar on China's 1982 Population Census. Li Chengrui , ED. Les Milieux “Naturels” du Globe . Jean Demangeot . The Geophysiology of Amazonia: Vegetation and Climate Interactions : Robert E. Dickinson , ED. Tenn-Tom Country . James F. Doster And David C. Weaver . Family Farming in Europe and America . Boguslaw Galeski And Eugene Wilkening , EDS. The Geography of Urban Transportation . Susan Hanson , Ed. Combating Desertification in Developing Countries . J. K. Jain , ED. Cartography in France—1660–1848. Science, Engineering and Statecraft . Josef W. Konvitz . Distribution of Distances in Pregeographical Space . Hans Kuiper . Physical Geography Lab Manual: A New Experimental Approach . Neal G. Lineback And John M. Harlin . Physical Geography: A Landscape Appreciation , 2nd ed. Tom L. Mc Knight . The Desert Is No Lady: Southwestern Landscapes in Women's Writing and Art . Vera Norwood And Janice Monk , EDS. France: A Geographical, Social, and Economic Survey . Philippe Pinchemel , translated, by D. Elkins and T. H. Elkins. Gene Banks and the World's Food . Donald L. Plucknett , Nigel J. H. Smith , J. T. Williams , And N. Murthi Anishetty . Latin American Development: Geographical Perspectives . David Preston , Ed. Making Sense of Development: An Introduction to Classical and Contemporary Theories of Development and Their Application to Southeast Asia . P. W. Preston . The History of the Countryside. Oliver Rackham . The Third World in Perspective . H. A. Reitsma AND J. M. G. Kleinpenning . The Industrial Geography of Australia . David C. Rich . The Recruiting Game , 2nd Ed., revised. John F. Rooney , JR. A Cultural Geography of North American Indians . Thomas E. Ross AND Tyrel G. Moore , EDS. Eastern Europe . Dean S. Rugg . Human Territoriality: Its Theory and History . Cambridge Studies in Historical Geography: 7. Robert David Sack . Experimental Fluvial Geomorphology . Stanley A. Schumm , M. Paul Mosley , AND William E. Weaver . The New Urban Landscape . David Schuyler . Atlas of American Women . Barbara Gimla Shortridge . Impacts of Hazardous Technology: The Psycho-Social Effects of Restarting TMI-1 . John Sorensen , Jon Soderstrom , Emily Copenhaver , Sam Carnes AND Robert Bolin . Modern Physical Geography , 3rd Ed., (Third Edition). Arthur N. Strahler AND Alan H. Strahler . India: Economic Resource Base and Contemporary Political Patterns . B. L. Sukhwal .  相似文献   

流动形变及重磁综合监测断层的研究     

车兆宏  巩曰沐 《大地测量与地球动力学》1995,(4)

分析了目前利用流动形变、重力、地磁复测资料进行地震预测所存在的困难，探讨了综合利用三种手段追踪应力场及地下介质动态的途径，提出了断层综合监测布点的原则，并介绍了依此原则所建的京西试验场的基本情况。  相似文献