基于改进分形技术的红外图像噪音抑制研究     

蒋定定  许兆林  李开端 《测绘工程》2004,13(4):32-34

红外图像杂噪音抑制是图像识别的重要技术基础.阐述如何对传统分形技术进行改进并将多重分形理论引入红外图像的噪音抑制,提出一种基于奇异性分析的红外图像消噪方法.在图像经过多重分形分析后,通过对多重分形谱相关的Holder指数进行特征化处理来实现图像消噪.这种方法可以在尽量保留信号奇异性(如边缘,纹理等)相关信息情况下,使得图像平滑,噪声消除,是红外图像消噪的一种新方法.  相似文献   

潞安—晋城矿区煤层气采收率分析     

成国清  李广昌 《中国煤田地质》2001,13(4):25-26

根据煤田地质瓦斯资料和煤层气参数井测试成果，分析了潞安－晋城（新区）矿区主煤储层的平均含气量、饱和度、临界解吸压力、理论采收率以及煤层甲烷解吸率、可解吸量等数据，得出本区主煤储层平均解吸率约为38％，高于全国其它地区。  相似文献   

内蒙古得尔布干森林沼泽区遥感地质解译研究   总被引：2，自引：0，他引：2  

段鹏  张新生  王旭东 《国土资源遥感》2002,(2):29-33

利用遥感技术在内蒙古得尔布干森林沼泽区开展地质解译研究。试图通过选择适合该区特点的遥感图像，在宏观地质解译基础上对区域构造展布特征有其控矿规律进行重点研究，进而预测贵重金属（Au、Ag）及有色金属（Cu、Pb、Zn）成矿带，为区内新一轮国土资源大调查提供一些有参考价值的遥感地质信息。  相似文献   

The structural evolution of the southern Apuan Alps: new constraints on the tectonic evolution of the Northern Apennines (Italy)Évolution structurale des Apuanes méridionales : nouvelles contraintes sur l'évolution tectonique des Apennins septentrionaux (Italie)     

Rodolfo Carosi  Chiara Montomoli  Nicola Bertuccelli  Maurizio Profeti 《Comptes Rendus Geoscience》2002,334(5):339-346

Structural analysis performed in the southern sector of the Apuan Alps Metamorphic Complex (AAMC) and on the overlaying Tuscan Nappe (TN) pointed out a structural evolution much more complex than that outlined till now. The comparison between the structural evolutions of the two tectonic units could provide new important constraints on the tectonic evolution of the whole belt. The two tectonic units recorded different tectonic evolution during the first stages of compression, while they shared the same deformation history later after the Tuscan Nappe overlapped the AAMC. The coupled tectonic units have been then deformed by two systems of folds, in a compressive tectonic regime. Extensional tectonics affected the units later, at upper crustal levels. To cite this article: R. Carosi et al., C. R. Geoscience 334 (2002) 339–346.  相似文献   

Ductile shear zones on carbonates: the calcaires plaquettés of northern Calabria (Italy)     

Alessandro Iannace  Stefano Vitale 《Comptes Rendus Geoscience》2004,336(3):227-234

Field, petrographic and quantitative strain analysis have been performed on highly foliated limestones outcropping in northern Calabria and generally attributed to two distinct units (San Donato and Pollino) on the basis of presence/absence of metamorphism. The deformation, however, is comparable in all the studied outcrops indicating that the widely accepted distinction of units in the area should be revised. Deformation is very localized in narrow ductile shear-zones affecting Tertiary conglomerates and Jurassic oncoidal packstones. The former are more strained because of their closeness to siliciclastic beds. The main deformation mechanism was grain boundary sliding with minor intragranular strain and pressure solution. To cite this article: A. Iannace, S. Vitale, C. R. Geoscience 336 (2004).  相似文献   

热失重分析中烧失率的地质意义初探——以海拉尔盆地贝38井南屯组一段泥岩为例     

张淑华  陈春瑞  沈光政 《海相油气地质》2005,10(2):53-56

海拉尔盆地贝38井南屯组一段20块泥岩样品中出现5块烧失率异常,其烧失率达8.812%～18.770%,为其它样品的2～4倍。对异常样品作进一步烧失试验:0～400℃区间,烧失强度都较低,说明粘土矿物的吸附水、层间水及有机质的可溶烃含量都较少;400～500℃区间有2块样品的烧失强度明显异常,表明其有机质含量明显偏高;500～950℃区间,另2块样品的烧失强度特别高,这是由于其中的伊利石结构水脱失所致。该地层的微量元素Cu/Zn、Sr/Ba、V/Ni和常量元素Mn/Ti、MnO2随深度的变化与烧失率曲线有极好的相关性。烧失率异常可指示氧化—还原环境或水体深浅变化以及判别水体的盐度。  相似文献   

大柴旦盐湖湖滨盐田日晒场施工建造     

李刚  高世扬 《盐湖研究》1994,2(2):49-56

通过对盐湖湖区土壤调查，在对区域水文地质资料进行分析的基础上，认为在大柴旦地区建造日晒池，利用太阳能进行日晒卤水，分离一般盐类是经济可行的．制取高含硼和锂盐的氯化镁饱和卤水，供盐酸酸化分离硼酸，最后提取锂盐．  相似文献   

韶花铁路花岗岩球状分布规律统计分析     

冯涛  吴光  赵志明  李建强 《水文地质工程地质》2006,33(6):94-96

本文在对某铁路(武广客运专线韶关-花都段)沿线花岗岩地段进行工程地质钻探的基础上,对该地段花岗岩球状风化的地下分布规律进行统计分析,揭示了在该地段地下隐覆的花岗岩风化球具有风化球埋深主要集中在0~40m之间、风化球竖向球径集中在0~5m之间、风化球表现形式主要为W3含W2的特点,并据此提出相应的工程建议。  相似文献   

云南贡山818特大泥石流灾害调查分析与启示   总被引：1，自引：0，他引：1  

张杰  李世凯  甘云兰  张红兵  晏祥省  张卫锋  肖华宗  杨帆 《工程地质学报》2015,23(3):373-382

本文是在野外调查的基础上,结合遥感解译数据,通过对地质环境背景分析,详细阐述了东月各河泥石流灾害的成因与特征:远距离、大坡降、窄峡谷的地形条件以及平直的沟道,为本次泥石流的发生提供了强有力的地势条件; 流域上游大量的松散堆积物为本次泥石流的暴发提供了充足的物源; 泥石流历时2273s,流速4.62ms-1,流量1008m3s-1,在沟口形成长度约300m、最大宽度约400m的堆积扇,冲出方量约60.5104m3,一次冲出固体物质总量41.95104m3,泥石流流体具结构性,直进性强,运动中无垂直交换,浆体浓稠,浮托力大,具有明显的辅床减阻作用和阵性运动特征,泥石流容重2.04gcm-3,属于特大型黏性泥石流; 泥石流在距沟口2.5km的弯道处超高现象比较明显,其高度为4.1m,泥石流整体冲击力为64.01kN,单块块石最大撞击力为491.27tf; 东月各河泥石流具有高落差、大坡降、窄峡谷、大体量、高速度、远距离的特点,其隐蔽性、突发性和破坏性极强,属于典型的高位泥石流。对该泥石流的形成机理和运动特征分析,可为整个怒江流域,乃至西南高山峡谷区高位泥石流灾害的早期识别、监测预警与风险评价等提供科学依据。  相似文献   

The GeoPT Proficiency Testing Scheme for Laboratories Routinely Analysing Silicate Rocks: A Review of the Operating Protocol and Proposals for its Modification          下载免费PDF全文

Michael Thompson  Peter C. Webb  Philip J. Potts 《Geostandards and Geoanalytical Research》2015,39(4):433-442

The GeoPT proficiency testing programme for geochemical laboratories has been operating for nearly 20 years. This review, based on an analysis of accumulated data and extensive experience, examines whether the protocol followed during this period continues to be appropriate. Possible changes that might be considered for future implementation are examined, in particular the procedures for calculating assigned values, target values, z‐scores and the applicability of dual fitness‐for‐purpose criteria. We conclude that the existing protocol remains largely appropriate and effective, but propose that a single fitness‐for‐purpose criterion be adopted, with an option for laboratories to recalculate their z‐scores if the criterion is inappropriate for their requirements.  相似文献