吐哈盆地侏罗系层序地层学研究

吐哈盆地侏罗系是一个盆地充填层序 (一级层序 ),包括 4个构造层序 (二级层序 ),分别与侏罗纪湖盆的 4个演化阶段 (稳定沉降阶段、短期收缩阶段、扩张阶段和萎缩阶段 )相对应,其中又分为 13个 (三级 )层序。与海相地层不同的是,本区识别出了 4种层序边界类型 (A型、B型、C型和D型 ),其对应的层序本文分别称之为冲积层序、淹没层序、类Ⅰ型层序和类Ⅱ型层序。冲积层序形成于构造剧烈抬升时的盆地萎缩阶段,淹没层序形成于构造沉降迅速时的盆地扩张阶段.     

正常固结饱和粘性土的不排水强度

本文以有效应力强度理论和Henkel孔隙水压力公式为基础,建立了各种类三轴与平面应变试验条件下正常固结饱和粘土的不排水强度公式及相互关系;初步估计了粘土强度随固结增长的计算公式.     

马斯京根-康吉洪水演算方法的稳定性分析

基于运动波差分解的数值扩散,在一定条件下可以模拟扩散波物理扩散的概念,利用有限差分方法,建立了马斯京根-康吉洪水演算方法.对于该差分格式中的权重系数X,国内外长期以来没有统一的定论.本文据此利用Von Neumann稳定性分析方法,对该差分格式进行了较为深入的分析,且得到了该差分格式的稳定性条件.     

计算机小短文

随着电脑的日益普及，网络已逐渐深入到我们的工作、生活和学习,独网络病毒得以广泛传播。为此，网络用户必须要防杀之。     

叠前正演模拟与偏移的网络并行计算

在叠前深度偏移和非零炮检距声波方程正演计算过程中包含了大量的可并行计算的成分。作者在本文中提出叠前正演模拟与偏移的网络并行计算算法，并基于TCP／IP协议，将该算法设计成网络并行处理程序，极大地提高了计算效率。实际运算结果证明，本文提出的并行算法和技术路线是切实可行的。     

赣东北地区浅变质岩中微古植物及其形成时代讨论

赣东北地区大面积出露一套浅变质岩系 ,该套地层由于缺乏可靠的化石资料 ,其时代归属一直存在很大的争议。随着 1∶5万区调工作的开展 ,相继获得了一批微古植物资料 ,并对所获得的这些资料进行了系统的整理和研究。在研究区内共存在微古植物 73属 173种 ,据统计 ,其所代表的时代绝大部分为中新元古代。根据微古植物组合 ,结合地层层序及有关同位素的测定年龄数据 ,认为研究区浅变质岩系的形成时代应为中新元古代。     

New imaging method for seismic reflection wave and its theoretical basis

Some new imaging formulas for seismic reflection wave and their theoretical basis are given. Phenomena of wave propagation should be characterized by instantaneous spectrum and expressed by complex function of three variables (time, space and frequency) in mathematics. Various physical parameters of medium are also complex functions of two variables (space and frequency). The relationship between reflection coefficient of medium and spectrum of reflected wave is given. Multi-reflection and filter of formations are considered in inversion formulas. Problems in classical convolution model and wave equation are illustrated. All these inversion formulas can be used to image underground medium by wavelet transform and method of “3-basic colors”. Different colors mean different media.     

Model of rigid and elastic-plastic motion in intraplate blocks and strain status of principal blocks in Chinese mainland

Introduction The Chinese mainland is located in the southeastern part of Eurasia plate and encircled by India, Eurasia, Pacific and Philippine Sea plates. It is one of areas with the strongest tectonic de-formation, especially Qingzang (QinghaiXizang) plateau and NS tectonic zone where the tec-tonic activity is more intensive and intricate. The main part of tectonic activity of Chinese mainland includes a series of tectonic zones and active blocks divided by them. Therefore, the research…     

Application of improved discrepancy principle in inversion of atmosphere infrared remote sensing

With the use of techniques in nonlinear problems, the IDP (improved discrepancy principle) method has been proposed and applied to the optimal smooth factor (parameterγ) in the inversion process of atmosphere profiles from satellite observation. This method has also been used to inverse atmospheric parameters from the observation of new generation geostationary operational environmental satellite (GOES-8). Results show that this method is more accurate than that in use.     

太阳宇宙线高能电子能谱的形成

提出了一个太阳脉冲和经变耀斑中高能太阳宇宙线电子能谱的形成模型，探讨了高能电子通过日冕捕获区的库仑损失、轫致辐射和同步辐射等物理过程，首次研究了日冕等离子体尾场对太阳宇宙线电子的加速及其能谱的形成．所得结果和观测谱能很好地符合，从而较合理地阐明了脉冲耀斑和经变耀斑两类太阳宇宙线高能电子谱的结构．