陆盆层序地层研究的思路   总被引：8，自引：1，他引：7  

岳文浙  丁保良 《地质论评》2000,46(4):347-354

根据陆相地层层序发育的特点,冲积扇、河流、三角洲或湖泊沉积环境,均受地层基准面控制,地层基准面穿越旋回控制着陆相环境重大层序分布。根据不同时间间隔的基准面穿越旋回序次,可将陆层序划分为盆地充填层序、构造层序、层序、亚层序以及小层序５个级别。每个层序（三级）根据蕨面的波动可划分为基准面上升沉积体系域和基准面下降沉积体系域,然后可进一步根据亚层序组的叠置特性进行细分。  相似文献   

Reparameterization of single difference and undifferenced kinematic GPS positioning models     

LIUXianglin CDJong CCJMTiberius 《地球空间信息科学学报》2003,6(2):1-7

A series of advantages of single difference(SD)and undifferenced(ZD)models are given as compared with the double difference(DD)model.However,rank defects exist in SD and ZD models.The reparameterization method is provided to resolve this rank defect problem by estimating some combinations of the unknowns rather than the unknowns themselves.The reparameterization of SD and ZD functional models is discussed in detail with their stochastic models.The theoretical confirmation of the equivalence of undifferenced and differenced models is described in a straightforward way.The relationship between SD and ZD residuals is given and verified for some special purposes,e.g.research on the stochastical properties of GPS observations.  相似文献   

Discriminant analysis applied to aerial radiometric data and its application to Uranium favorability in South Texas     

David A. Patterson  Fredric L. Pirkle  Mark E. Johnson  Thomas R. Bement  Newton K. Stablein  C. Kay Jackson 《Mathematical Geology》1981,13(6):535-568

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矩阵标准化求秩的计算机解法     

郭洁冰 《地球科学与环境学报》1991,(4)

矩阵求秩的方法比较复杂,目前尚未见到成熟的固定子程序。本文提出了“矩阵标准化求秩的计算机解法”。通过矩阵的标准形获得矩阵的秩,是一种普遍适用的计算机快速求秩方法。本文介绍了此算法的原理,并用FORTRAN—77结构化程序设计语言编写出此算法的通用子程序,同时给出调用实例。  相似文献   

AN IMPROVED ALGORITHM FOR THE GENERALIZED RANK ANNIHILATION METHOD   总被引：1，自引：0，他引：1  

BRUCEE.WILSON  EUGENIO SANCHEZ  BRUCER.KOWALSKI 《地理学报(英文版)》1989,(2)

An improved algorithm for the generalized rank annihilation method(GRAM)is presented.GRAM isa method for multicomponent calibration using two-dimensional instruments,such as GC-MS.In thispaper an orthonormal base is first computed and used to project the calibration and unknown sampleresponse matrices into a lower-dimensional subspace.The resulting generalized eigenproblem is thensolved using the QZ algorithm.The result of these improvements is that GRAM is computationally morestable,particularly in the case where the calibration sample contains chemical constituents not present inthe unknown sample and the unknown contains constituents not present in the calibration(the mostgeneral case).  相似文献   

Quantitative measurement of the effects of administrative division adjustments on regional development     

WANG Kaiyong  FENG Rundong 《地理学报(英文版)》2021,31(12):1775-1790

Administrative divisions are the important foundation of national governance and social development,and the adjustment of administrative divisions is a critical way to promote regional coordinated development.Under the background of globalization and regionalization,timely adjustment of administrative divisions is a major step to reconstruct the regional de-velopment pattern.In the perspective of regional coordinated development,this paper con-structs an Administrative Rank Potential Energy (ARPE) model to explore the mechanisms of administrative division adjustment (ADA) under coordinated regional development based on the theory of regional interaction,spatial field energy model and power exponential function.The results show that:(1) The development potential and influence of an administrative re-gion are closely related to the administrative jurisdiction,administrative resources,and the potential of regional coordinated development.(2) The growth rate of ARPE in the study area from 2010 to 2015 was 20.7％ compared to the period 2005 to 2010,and the potential for coordinated development increased to 3.05％ from 0.21％ before the "cancelling" the prefec-ture-level city of Chaohu.(3) The measurement results of the usefulness of ADA can not only distinguish the complex impacts brought about by social development,but also accord with real social and economic development conditions.The ARPE focuses on the both regional integrated development and individual development,thereby serving as a reference for ex-plaining and evaluating adjustments to administrative divisions at the macro-and mi-cro-scales.  相似文献   

山西省河东煤田北区煤变质特征及煤的荧光研究     

汤达祯  杨起  潘治贵 《现代地质》1988,2(1):96

为了探讨煤化作用的化学实质和改进荧光分析技术,对煤的可溶有机质进行了化学分析和荧光测定。通过采用镜质组反射率（R°max）及其它煤变质指标,得出了河东煤田北区煤级变化规律。研究发现本区煤的变质作用与鄂尔多斯盆地的地质发展过程密切相关。  相似文献   

NLS问题的不适定性及正则化解算方法     

唐利民 《测绘科学》2010,35(6):103-104,235

本文进一步完善定义了NLS问题的两种不适定性,对产生这两种不适定问题的现象进行了分析。借助于正则化理论,通过添加稳定泛函,结合高斯-牛顿法,构造了不适定NLS问题的正则化高斯-牛顿法求解公式;解决了普通高斯-牛顿法在迭代过程中其Jacobian矩阵是秩亏或者严重病态导致的不能收敛的问题;给出了非线性秩亏自由网平差的正则化高斯-牛顿法步骤;以几个经典NLS问题为例进行了数值实验,说明了本文所提方法的适用性。  相似文献   

邯郸-峰峰矿区不同变质程度煤中有机氮的赋存形态     

郝国强  胡社荣 《煤田地质与勘探》2020,48(1):70-76

氮是煤中的常见元素之一,煤中氮的赋存形态多样且随煤阶发生变化。以邯郸-峰峰矿区为例,利用X射线光电子能谱（XPS）实验,研究不同变质程度煤（R_ran=1.08%~3.67%）中有机氮的赋存形态,探讨煤中各形态有机氮相对含量随煤阶的变化规律。结果表明:按N 1s XPS谱图分峰峰值的结合能可将煤中氮的形态归为N-6、N-5、N-Q和N-X四种;研究区煤中N-5的相对含量最高,且随着煤阶的增高而降低;N-Q的相对含量随着煤阶的增高而增高;煤中N-6的相对含量随煤阶呈“增-减-稳”的变化规律;N-X的相对含量为9.1%~35.1%,其与煤阶关系不明显;在煤阶R_ran=1.08%~1.47%的范围内,煤的N 1s XPS谱图中缺失N-Q分峰,表明褐煤中相对含量最高的质子化吡啶氮在此阶段已几乎全部去质子化而转化为吡啶氮。不同变质阶段氮的赋存形态变化特征对燃煤发电及煤化工领域煤化学参数选取提供参考。   相似文献