Ni002因瓦水准标尺模板的研制     

邢思明  宋建桥 《武汉大学学报(信息科学版)》1993,(4)

本文详细地叙述和分析了Ni002 因瓦水准标尺模板研制的整个过程,包括冲孔模的研制,模板的冲裁,模板及标尺全分划刻划误差的检验,并由此推算出喷漆复制精度和模板的精度。文中,特别指出了冲孔模冲头间距误差正负号的排列对标尺检验结果的影响,并在实践中得到了验证。  相似文献   

能动断层的概念及其发展     

李愿军 《国际地震动态》1993,(7):1-4

  相似文献   

TM影像在河西地区荒漠化土地调查中的应用   总被引：14，自引：3，他引：14  

马立鹏  韩光庆 《中国沙漠》1996,16(4):401-406

遥感及其技术应用和卫星技术的发展为资源环境调查提供了丰富的信息，在人类社会经济活动中发挥着巨大作用。文章根据全国荒漠化土地调查要求及美国陆地资源卫星ＴＭ影像特点，分析了甘肃河西地区１２景、２４幅ＴＭ影像色调特征及形态特征。在此基础上，结合荒漠化土地类型划分建立了图像解译标志，并详细阐述了ＴＭ影像解译程序。通过评价此次荒漠化土地卫星遥感调查中ＴＭ影像的特点及应用效果，充分表明了该现代技术用于此类工作的极大成功  相似文献   

TM图像在县级土地资源调查与开发规划中的应用研究     

雷莉萍  戴昌达 《遥感学报》1989,(4)

TM图像自应用于土地资源调查以来,对其应用潜力争议很大。鉴于此,本文以河北省南皮县为研究区,利用常规方法,分析、评价了TM图像在县级土地利用制图与农业分区中的应用效果,并与SPOT图像进行了对比分析。研究结果表明,利用TM图像进行县级土地利用制图与农业发展分区,可以得到令人满意的结果,借助TM图像包括中红外在内的多波段光谱信息的优势,可以达到SPOT多波段图像的应用效果。本研究为我国应用TM图像进行县级土地资源调查与制定发展规划提供了一个实例。  相似文献   

地震观测质量评比的双轨制评分法     

陈开坊 《华南地震》1992,12(1):90-92

观测质量评比正在转入以内在质量为主的新阶段,在新的评分制尚未完善阶段,引入双轨制评分法。将有利于巩固第一阶段的成果,有助于推进实用化进程。本文对双轨制评分法的意义及实施的有关问题进行了讨论。  相似文献   

云南元阳—马关地区布格重力异常及其找矿意义     

黄元有  冉灿  吕许朋 《云南地质》2011,30(3):336-339,331

评细研究区布格重力局部异常后认为:元阳哈播为金、铜、铅锌找矿有利地段,金平-新安里为金、铅锌、铜、钼多金属找矿地段,个旧老厂为锡多金属矿成矿有利部位,薄竹山为钨、银铅锌找矿区,而马关老君山为钨、铜、铅锌多金属矿有利地段。  相似文献   

预报文稿解译与精细化发报程序相结合的应用     

王海龙  张大伟  刘敏  邹福玉 《内蒙古气象》2009,(2):31-32

采用在原有的预报流程基础上,通过解译预报文稿与精细化发报程序结合应用来制作预报。在实际应用中能够正确快速的把预报文稿进行翻译并入库,缩短了制作预报的时间,提高了预报业务流程的完整性,减轻了预报员的劳动量,同时也避免了重复性工作,为及时准确的发报工作提供了保证。  相似文献   

蜀南地区茅口组古岩溶识别标志及储层预测   总被引：1，自引：0，他引：1  

桑琴  黄静  程超  吴昌龙  彭祚远 《东北石油大学学报》2012,(2):53-57,64,126

为预测蜀南地区茅口组储层,通过地质、钻井与岩心观察,地震及测井、地化指标分析等方法确定古岩溶发育状况,结合生产测试资料分析古岩溶储层在地震和测井上的响应特征.结果表明:该区主要储集空间类型为裂缝—溶洞型;储层地震响应总体表现为地震波的异常反射、相干剖面的不连续性及速度反演出现低速区;测井响应表现为深、浅侧向电阻率降低且出现正差异,密度减小,中子孔隙度和声波时差增大,而井径和自然伽马曲线的变化受空隙充填控制.该结果对该区储层预测及油气勘探具有指导意义.  相似文献   

Spectral decomposition and de‐noising via time‐frequency and space‐wavenumber reassignment     

Li Han  Mauricio D. Sacchi  Liguo Han 《Geophysical Prospecting》2014,62(2):244-257

The reassignment method remaps the energy of each point in a time‐frequency spectrum to a new coordinate that is closer to the actual time‐frequency location. Two applications of the reassignment method are developed in this paper. We first describe time‐frequency reassignment as a tool for spectral decomposition. The reassignment method helps to generate more clear frequency slices of layers and therefore, it facilitates the interpretation of thin layers. The second application is to seismic data de‐noising. Through thresholding in the reassigned domain rather than in the Gabor domain, random noise is more easily attenuated since seismic events are more compactly represented with a relatively larger energy than the noise. A reconstruction process that permits the recovery of seismic data from a reassigned time‐frequency spectrum is developed. Two approaches of the reassignment method are used in this paper, one of which is referred to as the trace by trace time reassignment that is mainly used for seismic spectral decomposition and another that is the spatial reassignment that is mainly used for seismic de‐noising. Synthetic examples and two field data examples are used to test the proposed method. For comparison, the Gabor transform method, inversion‐based method and common deconvolution method are also used in the examples.  相似文献   

Improved edge detection mapping through stacking and integration: a case study in the Bathurst Mining Camp          下载免费PDF全文

Peter Tschirhart  Bill Morris 《Geophysical Prospecting》2015,63(2):283-295

Airborne geophysical surveys provide spatially continuous regional data coverage, which directly reflects subsurface petrophysical differences and thus the underlying geology. A modern geologic mapping exercise requires the fusion of this information to complement what is typically limited regional outcrop. Often, interpretation of the geophysical data in a geological context is done qualitatively using total field and derivative maps. With a qualitative approach, the resulting map product may reflect the interpreter's bias. Source edge detection provides a quantitative means to map lateral physical property changes in potential and non‐potential field data. There are a number of Source edge detection algorithms, all of which apply a transformation to convert local signal inflections associated with source edges into local maxima. As a consequence of differences in their computation, the various algorithms generate slightly different results for any given source depth, geometry, contrast, and noise levels. To enhance the viability of any detected edge, it is recommended that one combines the output of several Source edge detection algorithms. Here we introduce a simple data compilation method, deemed edge stacking, which improves the interpretable product of Source edge detection through direct gridding, grid addition, and amplitude thresholding. In two examples, i.e., a synthetic example and a real‐world example from the Bathurst Mining Camp, New Brunswick, Canada, a number of transformation algorithms are applied to gridded geophysical data sets and the resulting Source edge detection solutions combined. Edge stacking combines the benefits and nuances of each Source edge detection algorithm; coincident or overlapping and laterally continuous solutions are considered more indicative of a true edge, whereas isolated points are taken as being indicative of random noise or false solutions. When additional data types are available, as in our example, they may also be integrated to create a more complete geologic model. The effectiveness of this method is limited only by the resolution of each survey data set and the necessity of lateral physical property contrasts. The end product aims at creating a petrophysical contact map, which, when integrated with known lithological outcrop information, can be led to an improved geological map.  相似文献