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SRTM 地形模型在埃塞至吉布提 EPC铁路项目投标设计中的应用研究 认领
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作者 吕义辉 《铁道建筑技术》 2016年第S1期480-484,共5页
通过埃塞吉布提地区 SRTM地形模型与航测地形模型的对比分析,研究两者高程点的偏差范围及偏差规律,探讨在埃塞吉布提 EPC 铁路项目投标阶段中,将 SRTM地形模型作为设计基础资料的合理性;并进一步提出根据 SRTM地模测算工程量的优化... 通过埃塞吉布提地区 SRTM地形模型与航测地形模型的对比分析,研究两者高程点的偏差范围及偏差规律,探讨在埃塞吉布提 EPC 铁路项目投标阶段中,将 SRTM地形模型作为设计基础资料的合理性;并进一步提出根据 SRTM地模测算工程量的优化方法,以降低 EPC 项目投标报价的风险。 展开更多
关键词 EPC铁路项目 SRTM地形模型 航测地形模型 投标设计
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地下水水源地保护区划分方法及注意问题 认领
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作者 潘治霖 《新疆地质》 CAS CSCD 2017年第s1期91-92,共2页
据目前对地下水水源地保护区划分的研究成果和应用情况,对《饮用水水源地保护区划分技术规范》(HJ/T338-2007)中存在不足的探讨,对具体应用中划分技术方法及应注意的问题进行总结,以供各地下水水源地保护区划分工作参考.
关键词 地下水水源地 保护区划分方法 注意问题
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1951~2010年湛江市平均气温变化特征分析 认领
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作者 汪彪 刘玉国 +1 位作者 周毅 马应生 《气候变化研究快报》 2017年第5期283-287,共5页
利用1951~2010年湛江气象站(59658)的逐日平均气温资料,结合趋势分析法、M-K检验和小波分析等方法分别对湛江平均气温的趋势变化、突变检验和周期变化进行研究。得到主要结论如下:(1) 近60年的平均气温均值为23.3℃,标准差为0.48℃,倾... 利用1951~2010年湛江气象站(59658)的逐日平均气温资料,结合趋势分析法、M-K检验和小波分析等方法分别对湛江平均气温的趋势变化、突变检验和周期变化进行研究。得到主要结论如下:(1) 近60年的平均气温均值为23.3℃,标准差为0.48℃,倾向率为0.097℃/10a。(2) 在季节变化上,春季的平均气温变化幅度最大(1980~1989年代,STD = 4.4℃),夏季的均值最大(1990~1999年代,MEAN = 28.9℃),但变化幅度却最小(1951~1959和1960~1969年代的STD = 1.3℃)。(3) 湛江平均气温在1986年前后发生一次增加的突变。(4) 湛江年均气温存在2~3 a的和4~6 a的显著性震荡周期。 展开更多
关键词 全球变暖 M-K检验 小波分析 湛江
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一次高原低涡东移引发四川盆地暴雨的诊断分析 认领
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作者 胡垚 华维 《气候变化研究快报》 2018年第3期132-143,共12页
本文采用中国自动气象站与CMORPH卫星融合的降雨量资料、NCEP FNL再分析资料以及FY-2E相当黑体亮温资料,对2014年7月四川的一次暴雨天气进行诊断分析。结果表明:1) 此次暴雨产生于高原低涡东移出高原,其南部向四川盆地分裂出低槽的过程... 本文采用中国自动气象站与CMORPH卫星融合的降雨量资料、NCEP FNL再分析资料以及FY-2E相当黑体亮温资料,对2014年7月四川的一次暴雨天气进行诊断分析。结果表明:1) 此次暴雨产生于高原低涡东移出高原,其南部向四川盆地分裂出低槽的过程中。主要降雨区位于低槽前部,降雨带呈西南至东北走向;2) 暴雨过程中,副热带高压西伸至四川东南部,其外围偏南风向暴雨区持续提供水汽。暴雨区处于水汽辐合区,暴雨中心低层存在的不稳定能量区为暴雨的产生与发展提供充足的水汽与能量;3) 在暴雨开始前期,高原低涡东侧和东南侧低层700 hPa存在一正涡度平流区。这表明低层的正涡度得到发展,风场的辐合增强,上升运动得到发展,从而有利于强对流活动的产生,造成降水过程。这有可能是此次四川盆地暴雨过程产生的动力原因。从视水汽汇分析可知,在暴雨过程中,暴雨区中低层视水汽汇发展明显,而在暴雨后期暴雨区低层出现视水汽汇负值分布。这表明降水过程中所释放的潜热增加,加热大气,继而大气反过来作用于系统的维持与发展。这有可能是此次暴雨过程维持的能量原因。 展开更多
关键词 高原低涡 暴雨 诊断分析
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地图可视化在地质灾害数据制作中的应用 认领
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作者 陈思思 简季 +1 位作者 吴章生 胡运海 《计算机科学与应用》 2011年第2期77-80,共4页
随着GIS技术、计算机技术的飞速发展,可视化技术受到了越来越多的重视。本文将地图可视化技术应用于地质灾害数据的制作,从数据组织、图层配置、灾害地图显示等方面介绍制作地质灾害数据的一般方法。结果表明,该方法能直观、形象地表达... 随着GIS技术、计算机技术的飞速发展,可视化技术受到了越来越多的重视。本文将地图可视化技术应用于地质灾害数据的制作,从数据组织、图层配置、灾害地图显示等方面介绍制作地质灾害数据的一般方法。结果表明,该方法能直观、形象地表达地质灾害信息,有利于人们对灾情的评估。 展开更多
关键词 地图可视化 地质灾害 数据制作
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丹江河谷区铁路空间综合地质选线 认领
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作者 胡永占 《土木工程》 2019年第9期1344-1348,共5页
商州至丹凤段丹江河谷区,地质构造发育、两岸斜坡处滑坡、溜坍等不良地质广泛分布、水文地质条件复杂,第三系地层工程性质差。为研究宁西铁路在商州至丹凤段丹江河谷区线路方案,通过在大面积地质调绘基础上,采用遥感技术与钻探、物探、... 商州至丹凤段丹江河谷区,地质构造发育、两岸斜坡处滑坡、溜坍等不良地质广泛分布、水文地质条件复杂,第三系地层工程性质差。为研究宁西铁路在商州至丹凤段丹江河谷区线路方案,通过在大面积地质调绘基础上,采用遥感技术与钻探、物探、室内试验相结合的地质综合勘察手段,查明了该区域的地质构造、地层岩性特征、两岸斜坡处滑坡、溜坍等不良地质分布、地下水发育情况等工程地质及水文地质条件,重点对丹江两岸滑坡、溜坍等斜坡稳定性进行了准确的分析评价,同时对第三系地层的工程性质进行了工程适应性综合分析研究,形成了丹江河谷区地质选线的新思路,提出了地质选线的具体原则:线路方案宜尽量少通过斜坡段落,并且宜少以隧道方式通过第三系地层。 展开更多
关键词 宁西铁路 丹江河谷区 不良地质 第三系地层 综合勘察 地质选线
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海洋平台电缆参数重取对电压稳定评估的影响 认领
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作者 杨春生 刘冠荣 +2 位作者 魏海春 戴国华 王建明 《电气工程》 2018年第3期230-236,共7页
海洋平台电网之间都采用海底电缆传输电能,构成完全基于电缆的独立微网系统。但海底电缆参数会随运行情况发生变化,且与出厂参数区别较大,从而影响平台电网稳性评估等计算的准确性。本文通过考虑平台电网边界关联影响,利用平移变换和时... 海洋平台电网之间都采用海底电缆传输电能,构成完全基于电缆的独立微网系统。但海底电缆参数会随运行情况发生变化,且与出厂参数区别较大,从而影响平台电网稳性评估等计算的准确性。本文通过考虑平台电网边界关联影响,利用平移变换和时间加权回归方法,实现海底电缆参数的重取,进而提高平台微网电压稳定性分析计算的准确度。通过渤海某实际海洋平台群微网的仿真,验证了本文提出方法的准确性,且该方法只需要各平台电网本地运行参数,降低了互联平台间的通信和计算负担。 展开更多
关键词 海底电缆 海洋平台 参数重取 电压稳定 L指标 改进REI等值法
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Magnitude and Direction of Groundwater Seepage Velocity in Different Soil and Rock Materials 认领
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作者 Twana O. Abdullah Salahalddin S. Ali +2 位作者 Nadhir A. Al-Ansari Sven Knutsson Jan Laue 《工程(英文)(1947-3931)》 2020年第4期242-253,共12页
To understand and anticipate flow in various groundwater media, the magnitude and direction of groundwater flow velocity must be deemed. The studied area which is called Halabja-Sadiq Basin is in the northeastern part... To understand and anticipate flow in various groundwater media, the magnitude and direction of groundwater flow velocity must be deemed. The studied area which is called Halabja-Sadiq Basin is in the northeastern part of Iraq and covers an area of approximately 128,000 square hectometers. There are several groundwater aquifers in this region that supply nearly over 90% of all water needs. Subsequently, it is of highly requirement to identify various groundwater behaviors in the area. The objective of this study is to estimate the magnitude and direction of the groundwater seepage velocity with the aid of groundwater tool in Geographic Information System technology. Refer to the results of this analysis, the magnitude value of groundwater flow velocity ranged from 0 to 51 m/d, whilst the general flow movement is from the eastern part to the western part of the study area. The factor governing the direction of flow and velocity magnitude indicates the direction of dipping of the geological formation strata, the high head of groundwater in the eastern part, and the low transmissivity properties of aquifer materials in the western part. 展开更多
关键词 SEEPAGE VELOCITY MAGNITUDE AQUIFER GROUNDWATER Halabja Saidsadiq BASIN
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Kasner Universe in Creation-Field Cosmology 认领
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作者 Kishor S. Adhav Meena V. Dawande +1 位作者 Maya S. Desale Ranjita B. Raut 《现代物理(英文)》 2010年第3期190-195,共6页
We have studied the Hoyle-Narlikar C-field cosmology with Kasner [1,2] space-time. Using methods of Narlikar and Padmanabhan [3], the solutions have been studied when the creation field C is a function of time t only.... We have studied the Hoyle-Narlikar C-field cosmology with Kasner [1,2] space-time. Using methods of Narlikar and Padmanabhan [3], the solutions have been studied when the creation field C is a function of time t only. The geometrical and physical properties of the models, thus obtained, are also studied. 展开更多
关键词 Kasner SPACE-TIME CREATION FIELD COSMOLOGY COSMOLOGICAL Models of UNIVERSE
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Outlook of future climate in northwestern Ethiopia 认领
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作者 Dereje Ayalew Kindie Tesfaye +2 位作者 Girma Mamo Birru Yitaferu Wondimu Bayu 《农业科学(英文)》 2012年第4期608-624,共17页
Climate change is described as the most universal and irreversible environmental problem facing the planet Earth. While climate change is already manifesting in Ethiopia through changes in temperature and rainfall, it... Climate change is described as the most universal and irreversible environmental problem facing the planet Earth. While climate change is already manifesting in Ethiopia through changes in temperature and rainfall, its magnitude is poorly studied at regional levels. The objective of this paper was to assess and quantify the magnitude of future changes of climate parameters using Statistical Downscaling Mode (SDSM) version 4.2 in Amhara Regional State which is located between 8°45‘N and 13°45‘N latitude and 35°46‘E and 40°25‘E longitude. Daily climate data (1979- 2008) of rainfall, maximum and minimum temperatures were collected from 10 observed meteorological stations (predictand). The stations were grouped and compared using clustering and Markov chain model, whereas the degree of climate change in the study area was estimated using the coupled HadCM3 general circulation model (GCM) with A2a emission scenarios (Predictors). Both maximum and minimum temperatures showed an increasing trend;the increase in mean maximum temperature ranges between 1.55°C and 6.07°C and that of the mean minimum temperature ranges from 0.11°C and 2.81°C. While the amount of annual rainfall and rainy days decreased in the study Regions in the 2080s. The negative changes in rainfall and temperature obtained from the HadCM3 model in the current study are alarming and suggest the need for further study with several GCM models to confirm the current results and develop adaptation options. 展开更多
关键词 Amhara REGIONAL State CLIMATE Change Ethiopia HadCM3 STATISTICAL DOWNSCALING
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GC/MS: A Valid Tool for Soil Gas Hydrocarbons Speciation 认领
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作者 Laura Clerici Emanuela Mongini +2 位作者 Pasquale Robles Pierluisa Dellavedova Maria Antonietta De Gregorio 《分析质谱与色谱期刊(英文)》 2015年第3期54-62,共9页
This work describes an alternative method based on GC/MS technique with SCAN-ion approach for speciation of hydrocarbons contained in soil gas matrices and sampled on solid sorbent tubes (coconut shell charcoal).
关键词 Hydrocarbons SOIL GAS Matrices Solid SORBENT Tubes SOIL GAS GC/MS
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Nature of Centennial Global Climate Change from Observational Records 认领
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作者 Mohammed Anwer 《美国气候变化期刊(英文)》 2015年第4期337-354,共18页
In order to provide a better benchmark for climate simulation programs, climate data at Global Historical Climatology Network (GHCN) and Global Summary of the Day (GSOD) archived by the National Climate Data Center (N... In order to provide a better benchmark for climate simulation programs, climate data at Global Historical Climatology Network (GHCN) and Global Summary of the Day (GSOD) archived by the National Climate Data Center (NCDC) are used to ascertain the nature of climate change over the last century. After data validation, about 6000 stations are considered globally to determine the change in mean temperature, and about 5000 stations to determine that change in maximum and minimum temperatures. Global nature of temperature and its change are presented separately for January and July. Both maximum and minimum daily temperatures are used in the analysis. Trend of global change in annual precipitation is also reported here. Least square linear regression is used to ascertain the nature of these changes. Global nature of temperatures in both January and July show bimodal distributions, with the geographical region between the tropics in one mode and the region outside the tropic in another mode. The individual distributions of temperatures of both these regions show separate and similar histograms. Results indicate that over the last century, temperature in January increased more than that during July. Furthermore the minimum temperature in each case increased more than the maximum temperature. Ten separate estimates of temperature change are obtained from the data presented here using different methods. Considering all these estimates, the mean rise in temperature during January was 2.19°C, and during July was 1.72°C. The geographical nature of the rise in temperature shows that though it rises in most locations, the temperature also reduces along eastern Asia, some parts of central Russia, along south-eastern Australia, and along the east coast of the United States. Predominant rise in temperature is mostly over Europe, and in the arctic. Change in precipitation shows that though there is significant reduction rainfall globally, rainfall increases along the equator, in areas around the Gulf of Mexico, along eastern Asi 展开更多
关键词 CLIMATE Change GHCN GSOD IPCC NCPC Temperature PRECIPITATION
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New Computerized Method for the Geochemical Classification of Precambrian Carbonate Rocks: Case of a Set of African Cap Carbonates 认领
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作者 Hélène Miche Roland Simler +3 位作者 Pascal Affaton Olivia Mickala Florent Boudzoumou Michel Mbina 《地球科学国际期刊(英文)》 2013年第10期37-49,共13页
Post-sedimentary transformations have masked or completely obliterated the structures and textures of Precambrian carbonate rocks. Therefore, methods of classification of the carbonate rocks founded on the observation... Post-sedimentary transformations have masked or completely obliterated the structures and textures of Precambrian carbonate rocks. Therefore, methods of classification of the carbonate rocks founded on the observation of primary structures or textural characteristics are ill-adapted. Consequently, only certain geochemical classification methods allow us to distinguish the various rock-types in the case of Neoproterozoic carbonates. After presenting the most suitable geochemical classifications, we propose a new classification into 14 groups based on a regular ternary diagram with computerized data input. For each sample of carbonate rock, analysis of calcium and magnesium contents allows us to calculate the input data for our diagram i.e. the percentages of Calcite, Dolomite and Insoluble Residue. To automate the application of this diagram, input parameters are created in a descriptive file “Roches.ternaires.txt” using an option called “Ternaires” in the “Diagrammes” software developed by Roland Simler. Thirty cap carbonates of Africa are used to validate this new method. 展开更多
关键词 CARBONATE Rock Cap CARBONATE Ternary DIAGRAM Software CALCITE DOLOMITE
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Study of an Uplift of Sargodha High by Stratigraphical and Structural Interpretation of an East-West Seismic Profile in Central Indus Basin, Pakistan 认领
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作者 Shazia Asim Shahid Nadeem Qureshi Nasir Khan 《地球科学国际期刊(英文)》 2014年第9期1027-1036,共10页
Research Area comprises of Punjab Monocline, Sulaiman Foredeep and Eastern Part of Sulaiman Fold Belt (from east to west) in Central Indus Basin, Pakistan. Sargodha High is located in northeast of a Seismic Profile AB... Research Area comprises of Punjab Monocline, Sulaiman Foredeep and Eastern Part of Sulaiman Fold Belt (from east to west) in Central Indus Basin, Pakistan. Sargodha High is located in northeast of a Seismic Profile AB. Time and Depth models show the subsurface crustal variations near Sargodha High, which separates Upper Indus Basin from Central Indus Basin. The deposition of Pre-Cambrian sediments is uniform in area and Paleozoic sediments (Permian & Cambrian) are thinning in west. Mesozoic sediments (Cretaceous, Jurassic & Triassic) and younger sediments (Paleocene) are not deposited in this part suggesting an uplift of Sargodha High during Paleozoic time. An uneven distribution of Paleozoic rocks shows some thickness in east but erosion, thinning and almost truncation in west indicate their depocenter in east. This also represents a time of uplift of Sargodha High that shifts depocenter westward. Seismic data show a thick Mesozoic deposition in west, which onlaps on the Permo-Triassic unconformity suggesting an area of non-deposition. The gradual uplift of Sargodha high continues, which tilts the Mesozoic strata forming wedge shape geometry. 展开更多
关键词 Uplift UNCONFORMITIES STRUCTURAL TRUNCATIONS Depo-Center BASEMENT
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Aptian-Late Cenomanian Fluvio-Lacustrine Lithofacies and Palynomorphs from Mamfe Basin, Southwest Cameroon, West Africa 认领
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作者 Olivier A. Njoh Miriam B. Nforsi Junie N. Datcheu 《地球科学国际期刊(英文)》 2015年第7期795-811,共17页
The sedimentary sequences in the Mamfe Basin are generally thought of as continental (fluvio-lacustrine) in origin. But the wide spread occurrence of salt springs and salt accumulations and in places gypsum, often put... The sedimentary sequences in the Mamfe Basin are generally thought of as continental (fluvio-lacustrine) in origin. But the wide spread occurrence of salt springs and salt accumulations and in places gypsum, often puts to question the exclusive continentality throughout this basin’s history. The sequences studied portray a wide range of complex lithologies and lithofacies relationships and include basal and intra-formational conglomerates, sandstones, shales, carbonaceous, carbonate and halite facies respectively. All these are well exposed at several outcrop sections distributed all over the basin with some measuring up to and above 30 m in height.?Sedimentary structures include: parallel aligned imbricated prismatic pebbles, plannar to trough-cross stratifications, fining upward grain size distribution and thin frequently alternating sandstone-shale beds. Palynological data have been obtained for the first time from the shally and carbonate intervals and integrated with five lithofacies associations, permitting the determination of the ages and paleo environmental reconstruction. The palynomorphs are characterized by pteridophytic spores dominated by?Cicatricosisporites?sp.,Cyathidites?sp. and?Deltoidspora?sp., pollen grains include gymnosperms dominated by?Classopollis annulatus?and?Classopollis todosus?and angiosperms represented by?Retitricolpites?sp. and?Retimoncolpites?sp., fungal remains include some hyphae and?Fusiformisporites?sp. Only a few dinoflagellate cysts dominantly?Spiniferites?were encountered at Nfaitok outcrop, suggesting a proximal sea water influence. A fluvial, lacustrine-deltaic and an anoxic deep bottom lake setting sub-environments were reconstructed with no marine strata encountered. The brines are here suggested to have originated from sea water splay over a barrier and complimented by the chemistry of the drained surrounding country rocks. The palynomorph assemblage suggests an Aptian-Turonian age for the studied sequences and a chronostratigraphic sequence in which the Nfaitok and 展开更多
关键词 CRETACEOUS LACUSTRINE Lithofacies Mamfe BASIN PALYNOMORPHS
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牵引式古滑坡形成机理与治理方法初探 认领
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作者 速田勇 许汉华 +4 位作者 秦刚 张向阳 刘文连 杨正东 槐以高 《中国水运:下半月》 2019年第12期242-243,共2页
牵引式滑坡定义为:下部先滑使上部失去支撑而变形滑动的滑坡。在治理时,考虑到上游的滑块体处于稳定状态,一般仅针对不稳定的下游滑块,采取工程措施,提高其稳定性系数,达到治理效果。但是由于自然形成的滑坡灾害情况复杂,很难完全匹配... 牵引式滑坡定义为:下部先滑使上部失去支撑而变形滑动的滑坡。在治理时,考虑到上游的滑块体处于稳定状态,一般仅针对不稳定的下游滑块,采取工程措施,提高其稳定性系数,达到治理效果。但是由于自然形成的滑坡灾害情况复杂,很难完全匹配这种经典的模型,所以还需根据具体情况予以对待。本文以西南地区某古滑坡为例,针对其形成的机理因素进行分析,提出了治理的方法。 展开更多
关键词 古滑坡 牵引式 地貌形态 形成机理 治理方法
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探讨现代测试分析技术在矿物材料中的应用 认领
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作者 余邦权 卢智 +2 位作者 杨蓉 宋晋 张熙 《冶金管理》 2019年第13期105-105,共1页
现代测试分析技术的研发促进了地质矿产勘查中矿物材料检测工作的发展,为矿物材料性质研究与用途规划创设了便捷条件。本文分析了几种典型的现代测试分析技术,围绕新型分光光度法、锍试金-电感耦合等离子体质谱法、原子荧光光谱法等角度... 现代测试分析技术的研发促进了地质矿产勘查中矿物材料检测工作的发展,为矿物材料性质研究与用途规划创设了便捷条件。本文分析了几种典型的现代测试分析技术,围绕新型分光光度法、锍试金-电感耦合等离子体质谱法、原子荧光光谱法等角度,探讨了现代测试分析技术在矿物材料中的具体应用,以供参考。 展开更多
关键词 地矿检测 矿物材料 分光光度法
基于DEM的陕北黄土高原地形因子的提取与分析 认领
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作者 王媛媛 《西部大开发:土地开发工程研究》 2019年第12期28-36,共9页
本文基于SRTM(90 m)DEM数据,提取陕北黄土高原多个地形因子。通过ArcGIS中盆域分析及分水岭工具,结合ETM影像特点,将整个研究区划分成11个区域,对各区域内部的各类地形因子进行定量分析,揭示陕北黄土高原地貌形态的空间变化情况。结果显... 本文基于SRTM(90 m)DEM数据,提取陕北黄土高原多个地形因子。通过ArcGIS中盆域分析及分水岭工具,结合ETM影像特点,将整个研究区划分成11个区域,对各区域内部的各类地形因子进行定量分析,揭示陕北黄土高原地貌形态的空间变化情况。结果显示:高程、坡度、坡向等由DEM直接获取地形因子的精度与DEM本身精度相关,坡度变率、坡向变率、地形起伏度及高程变异系数等表征地形变化量的地形因子在数值上整体呈现正项分布趋势。高程均值在1000~1600 m之间,研究区3、8、10、11的内部高差大于1000 m,其余研究内部高差小于1000 m;坡度变率与坡度值分布情况一致,研究区1、4属于值较小的一组,研究区2、3、5属于第二组;各研究区坡向分布均匀,坡向众数出现最多的为西南向和东向。所有研究区水平曲率高于0的面积最大,低于0次之,等于0的最小;研究区2及研究区10剖面曲率0以上的面积占比大于0以下的面积占比,其余研究区相反,所有研究区剖面曲率等于0的面积占比最小;在本文的窗口尺寸下,地形起伏度、高程变异系数的值随提取窗口的增大而增大,研究区1和4的地形起伏度RF和高程变异系数V值均明显小于其他研究区,其余研究区地形起伏度RF及高程变异系数V值随位置和窗口的变化而波动变化。 展开更多
关键词 黄土高原 地形因子 曲率 地形起伏度 变异系数
利用压缩感知技术的离散正交S变换地震数据重建 认领
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作者 赵子越 李振春 张敏 《石油地球物理勘探》 EI CSCD 北大核心 2020年第1期29-35,5共8页
压缩感知中不同稀疏变换的重建效果及计算效率存在差异,为此文中提出一种基于压缩感知技术的离散正交S变换(DOST)地震数据重建方法。通过求取一组正交基函数与时间序列的内积,得到时频矩阵,使原始信号呈现更强稀疏性,以改善压缩感知地... 压缩感知中不同稀疏变换的重建效果及计算效率存在差异,为此文中提出一种基于压缩感知技术的离散正交S变换(DOST)地震数据重建方法。通过求取一组正交基函数与时间序列的内积,得到时频矩阵,使原始信号呈现更强稀疏性,以改善压缩感知地震数据重建效果。该方法弥补了S变换不能作为压缩感知的稀疏变换的局限性,向压缩感知理论体系引入了一种适用的稀疏变换方法。理论模型和实际数据试算结果表明,该方法迭代快速且收敛稳定,整体重建效果令人满意。 展开更多
关键词 压缩感知 稀疏变换 数据重建 离散正交S变换(DOST)
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重磁资料在准格尔旗地区地质构造解释中的应用 认领
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作者 荣幸 《地质调查与研究》 2019年第4期315-320,共6页
本次工作基于准格尔旗地区重力异常数据,通过对重力数据进行多种有效处理,分析重力场特征,进行异常分区,并结合已知地质、物性参数及磁法资料,圈定出25个局部异常;划分出区内3个明显密度界面和2个明显磁性界面;探讨了区域构造及断裂构... 本次工作基于准格尔旗地区重力异常数据,通过对重力数据进行多种有效处理,分析重力场特征,进行异常分区,并结合已知地质、物性参数及磁法资料,圈定出25个局部异常;划分出区内3个明显密度界面和2个明显磁性界面;探讨了区域构造及断裂构造在重磁场上的表现形式,推断出断裂构造24条;依据重磁场特征,划分出4个三级构造单元和7个四级构造单元,为本区地质构造的研究提供了新的参考资料。 展开更多
关键词 重力异常 航磁异常 边界识别 断裂构造 地质构造单元
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