基于小波多分辨率分析方法的海冰遥感影像数据融合   总被引：6，自引：0，他引：6  

吴奎桥  王浒  黄润恒  刘建强 《遥感学报》2001,5(2):130-134

采用小波多分辨率分析方法，对辽东湾2000－01－18的海冰遥感数据（NOAA／ARHRR和Radarsat/ScanSAR)进行了融合分析，并从几方面对结果作了深入的分析和对比。文中首次采用了小波分析中的多层次分解和重构技术用于数据融合分析。  相似文献   

Modelling elastic media with the wavelet transform     

João Willy Corrêa Rosa  Fabbryccio Akkazzha C. M. Cardoso  Keiiti Aki  Henrique S. Malvar  Fredy A. Villaorduña Artola  José Wilson Corrêa Rosa 《Geophysical Journal International》2001,146(2):454-488

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Estimation of the Oil Reserves Requirement to Meet a Given Production Level—Mathematical Modeling     

Feygin  M. V.  Ryzhik  V. M. 《Natural Resources Research》2001,10(1):51-58

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地下水观测网的若干问题与基于信息熵的研究方法   总被引：5，自引：0，他引：5  

陈植华 《地学前缘》2001,8(1):135-142

观测站点分布的任意性、随意性和层次不清以及观测数据的冗余性等是中国地下水观测网普遍存在的问题 ,这些问题制约着观测网提供可靠和有效数据信息的能力。文章以河北平原地下水观测网为例 ,分析了观测网几个问题的表现和原因 ,并对国内外观测网优化设计的指导思想、技术方法的现状和进展作了简要介绍。在参考大量国内外研究成果的基础上 ,主要介绍了基于信息熵原理研究观测网优化设计的方法 ,包括基本概念、原理和解决观测孔层次分类、信息冗余以及空间优化布局的技术思想。笔者认为 ,信息熵方法是一种能够评价地下水观测网信息 (而不是数据 )收集能力和优化观测网布局的很具发展潜力的技术方法。  相似文献   

青海拉鸡山构造带是裂谷还是构造窗——与王二七研究员商榷   总被引：2，自引：0，他引：2       下载免费PDF全文

左国朝  李志林等 《地质论评》2001,47(6):561-566

拉鸡山构造带东西长逾650km,展布于由元古宇组成的结晶地块内部，是一条早古生代火山岩极为发育的构造带。长期以来众多学者对拉鸡山进行大地构造学、岩石学研究。作者曾在拉鸡山从事多年野外调查工作，研究认为该地区无论在区域地质学、岩石学、构造变形学还是在大地构造演化方面其早古生代构造演化史皆具典型的裂谷带特征。晚古生代以来，经历了陆内多阶段造山过程，而为后期多阶段抬升的构造窗观点值得商榷。  相似文献   

地质灾害井间地震层析成像研究          下载免费PDF全文

裴正林  余钦范 《地球学报》2001,22(2):179-184

地质灾害体如岩溶、陷落柱、软弱层等的井间地震层析成像属于复杂模型或大扰动异常体的非线性成像，该文首次将小波多尺度思想纺入到蟛间层析成像，建立了小波多尺度井间地震层析成像方法，很好地解决了非线性成像的难题，大大地提高了图像的质量和分辨率，数值模型试验和实际工程应用证实了该方法的实用性和良好效果。  相似文献   

Measurements of stratospheric chlorine monoxide (ClO) from groudbased FTIR observations     

W. Bell  C. Paton-Walsh  T. D. Gardiner  P. T. Woods  N. R. Swann  N. A. Martin  L. Donohoe  M. P. Chipperfield 《Journal of Atmospheric Chemistry》1996,24(3):285-297

Infrared absorption features due to ClO in the lower stratosphere have been identified from groundbased solar absorption spectra taken from Aberdeen, U.K. (57° N, 2° W) on 20 January 1995. A vertical column abundance of 3.42 (±0.47)×10¹⁵ molec cm^-2 has been derived from 13 independent absorption features in the P and R branches of the (0–1) vibration-rotation band of ³⁵ClO, spanning the spectral region 817–855 cm^-1. The observed absorption features are consistent with very high levels of ClO (approximately 2.6 parts per billion by volume (ppbv)) in the altitude range 16–22 km. A comparison of this profile with a 3D chemical transport model profile indicates the observation was made inside the polar vortex and shows good qualitative agreement but the model underestimates the concentrations of ClO. Simultaneous measurements of other species were made including HCl, HF and ClONO₂. These columns yield a value for HCl+ClONO₂+ClO of 7.02±0.65×10¹⁵ molec cm^-2. This is lower than the total inorganic chlorine (ClO _y ) column of 10.7±1.6×10¹⁵ molec cm^-2 estimated from mean measured (HCl+ClONO₂)/HF ratios together with in-vortex HF measurements. The discrepancy is probably due to significant amounts of the ClO dimer (Cl₂O₂) in the lower part of the stratosphere. The measurements of highly elevated levels of ClO are used to estimate O₃ loss rates at the 400, 475 and 550 K levels making assumptions about the probable distribution of ClO and Cl₂O₂. These are compared with loss rates derived from ozone sonde data.  相似文献   

广义Radon变换与叠前地震数据处理   总被引：1，自引：0，他引：1       下载免费PDF全文

沈源  杨文采 《地球物理学报》1992,35(3):369-379

在本文中,首先讨论了与几种地震层析成像对应的Radon变换公式,并导出了叠前地震记录的数学模型.在分析叠前地震记录与广义Radon变换的关系的基础上,讨论了速度分析、滤波、动校正、叠加等地震数据处理的数学物理意义.为展示广义Radon变换在地震数据处理中的应用,给出了用于滤波和消除多次波的方法及算例.  相似文献   

On the seismic regime network method     

Zegao Wang  Yan Guo  Shulian Li  Yinghua Dai  Peiqing Sun 《地震学报(英文版)》1992,5(2):245-255

In this paper, based on the previous study of practical use of seismic regime windows and seismic regime belts, the problem of establishing a “seismic regime network” consisting of “windows” and “belts” is further posed and discussed according to the observed fact that many “windows” and “belts” make responses to one earthquake. For the convenience of usage, the “seismic regime network” is divided into two classes, the first class and the second one. The former can be used in tendency prediction for long-term seismic activity in a large area, the latter used in short-term prediction in a small area. In this paper, after briefly discussing the physical significance of “seismic regime network”, it is pointed out that this simple and easily used method can be used to observe and extract seismic precursory information from a large area before a great earthquake, thus it can provide a reliable basis for the analysis and judgement of seismic regime tendency in time and space. No doult, this method is of certain practical significance. The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,13, 161–169, 1991. The English version of this paper is improved by Prof. Shaoxie Xu.  相似文献   

中国东南沿海及邻近海区一种独特的大陆增生方式——转换断层向俯冲体系的转变     

周祖翼 《上海国土资源》1992,(1)

闽东沿海构造带—东海陆架西缘断裂、钓鱼岛隆起带(台湾—宍道褶皱带)以及帛琉—九州洋脊在中生代期间先后经历了自转换断层向俯冲系统的转变,这种转变构成了中国东南及毗邻海区独特的大陆增生方式,它表明特提斯和古太平洋的演化对这一地区的中、新生代构造格局起着重要的制约作用。  相似文献