沉积波动过程分析在地层层序分析中的应用--以塔里木盆地为例   总被引：4，自引：0，他引：4  

刘国臣 《沉积学报》1998,16(4):14-20

沉积波动过程是地壳波状运动的具体表现,它是各种天文因素、地质因素共同作用的结果,沉积波动过程的时空演化控制着地层层序的时空展布特点。在介绍沉积波动过程分析概念、技术思路、工作方法的基础上,利用沉积波动曲线在剖面上的预测功能及对沉积－剥蚀过程起止时间、不整合的研究成果,分析了塔里木盆地震旦系至第四系各主要构造层的地层展布特征,并对其形成过程及成因进行了分析,在理论和方法研究方面,试图将沉积波动特征的研究与层序地层学的研究结合起来,提出了地层格架－沉积波动特征连井对比图的概念和编制方法,该类图件能直观地反映多期不整合的存在及不整合间断的时间,并能直观地反映各层序的时空分布,而且能够解释地层格架的形成过程,进而进行成因分析,是沉积波动过程分析方法与层序地层学结合的一种具体、有益的偿试。  相似文献   

扩散波的时空反演与洪水实时预报技术   总被引：2，自引：1，他引：1  

李兰 《水文》1998,(6):1-5

以扩散波方程描述天然河道中的洪水波运动规律。将数学物理反问题理论和离散反演算法与河道流量演算相结合提出了扩散波实时预报的方法。该法的特点是在求解流量场Ｑ（ｘ,ｔ）的同时反演计算扩散波波速Ｃ（ｘ,ｔ）和扩散系数Ｄ（ｘ,ｔ）,根据不断监测的新信息系列,直接利用原偏微分方程进行参数的实时校正和预报过程实时修正。  相似文献   

铟-1-苯基-3-甲基-4-苯甲酰基吡唑啉酮-5-安替比林体系络合吸附波的研究     

张玲金  卢巽珍 《岩矿测试》1998,17(1):48-50

在ｐＨ４５的ＨＡｃ＿ＮａＡｃ介质中,Ｉｎ＿１＿苯基＿３＿甲基＿４＿苯甲酰基吡唑啉酮＿５（ＰＭＢＰ）＿安替比林体系于－０５７Ｖ（ｖｓ．ＳＣＥ）处产生一良好的极谱波。Ｉｎ在００１～０５ｍｇ／Ｌ与波高呈线性关系。检出限０１μｇ／Ｌ。实验证明,该波为可逆的络合物吸附波,络合物中的电还原体为中心离子Ｉｎ３＋。Ｉｎ３＋与ＰＭＢＰ的组成比为１∶２。在不改变峰电位的情况下,安替比林使Ｉｎ＿ＰＭＢＰ＿ＨＡｃ＿ＮａＡｃ体系的极谱波高显著增加,波形变得非常尖锐对称。探讨了安替比林增敏作用机理。  相似文献   

声频应力波在锚杆锚固状态检测中的应用   总被引：17，自引：0，他引：17  

汪明武 《地质与勘探》1998,34(4):54-56,59

研究了声频应力波法快速普查检测锚杆锚固状态的原理及评价分级标准,并将它成功地应用于潘一矿锚杆施工质量的检测,得出了利用声频应力波快速普查检测锚杆锚固质量的方法是切实可行和有效的。  相似文献   

Spectral Estimation of Irregularly Sampled Nonstationary Multidimensional Processes by Time-Varying Periodogram     

Li Chao 《Mathematical Geology》1998,30(1):43-56

A multidimensional version of the time varying periodogram has been developed. The estimation method based on the multidimensional time-varying periodogram has been applied to a nonstationary multidimensional storm model. This work proposes that the multidimensional time varying periodogram is capable of estimating nonstationary spectral density functions in space and time.  相似文献   

The Wave Energy Concentration at the Agulhas Current off South Africa   总被引：3，自引：0，他引：3  

Lavrenov  I. V. 《Natural Hazards》1998,17(2):117-127

The case of a freak wave collision with the ship in the Agulhas current is described. The explanation of the appearance of the freak wave as a result of wind-wave transformation in the Agulhas current is given. Swell is captured and intensified by the counter-current and is located in the neighbourhood of the maximum value of the current velocity, as a result of which there is a great concentration of wave-energy density. The superposition of wind and sea with swell transformed by the current promotes the formation of the freak waves. Using a simple mathematical analysis, an optimal ship track is proposed which could reduce the risk of collision with a freak wave.  相似文献   

Extraction of rhyolitic component of Vedde microtephra from minerogenic lake sediments   总被引：5，自引：0，他引：5  

Chris S. M. Turney 《Journal of Paleolimnology》1998,19(2):199-206

A technique is described for the extraction of rhyolitic microtephra from inorganic Lateglacial lake sediments. This technique was successfully applied by Lowe and Turney (1996) and is an adaption of the method described by Pilcher & Hall (1992) for application to Holocene peat deposits. It uses a density separation procedure to concentrate any microtephra component in lake sediments and was applied to the investigation of a lake sediment succession from a small basin in NE Scotland. Using this approach is was possible to define quantitatively for the first time the presence of the Vedde Ash tephra layer on the British Isles.  相似文献   

Sensitivity of frequency-dependent traveltimes to laterally heterogeneous, anisotropic Earth structure     

Li Zhao  & Thomas H. Jordan 《Geophysical Journal International》1998,133(3):683-704

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Seismic wavefield calculation for laterally heterogeneous whole earth models using the pseudospectral method   总被引：4，自引：0，他引：4  

T. Furumura  B. L. N. Kennett  & M. Furumura 《Geophysical Journal International》1998,135(3):845-860

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Model of a strong volcanic blast and a method of estimating the mass ejected     

N.N.Myagkov 《Geophysical Journal International》1998,133(1):209-211

A hydrodynamic model of a strong volcanic blast associated with large (caldera-forming) ash–gas-flow eruptions is presented. We show that the mass erupted from a vent influences considerably the damping of the shock wave. If the ejected mass flux is constant, the shock amplitude as a function of distance will decrease slower (in accordance with the inverse 4/3 power law) than that of an atomic explosion (the inverse cube power law). From the modelling, we extract a relation connecting the effective energy of a blast with the mass ejected during the blast phase. The mass released during the largest explosion of the 1883 eruption of Krakatau, and the lateral blast energy at Mount St. Helens on 1980 May 18 are estimated on the basis of the equation obtained.  相似文献