拟合法15°波动方程有限差分串联偏移

本文把最佳拟合算法（三点和五点差分格式）及串联偏移方法应用在15°波动方程偏移中。由于拟合法的差分因子随着采样间隔、步长、速度等参数的变化而变化,因此与原有的波动方程差分偏移法相比,串联偏移方法能有效的使大倾角归位,克服频散,速度及步长可以灵活变化,运算效率高等优点。     

Li3N·LiI·LiCl锂快离子导体研究

采用固态反应的方法制备Li_3N·LiI·LiCl快离子导体样品。使用X—射线衍射分析和差热分析的方法进行物相鉴定。电化学性能测试结果表明,样品具有较高的离子电导率,在100℃,其电导率可达10~(-4)_s/cm量级。样品的电导率与温度的关系很好地遵循Arrhenius方程。测得样品的电导活化能E_a为0.45eV。     

地球弓激波前的低频磁流体波

一、引言 在地球弓激波前存在着低频磁流体波。这种低频磁流体波是太阳风在地球弓激波上的反射粒子和太阳风粒子之间相互作用产生的。根据人造卫星的观测资料可以得到,在地球弓激波前,Pc3-4脉动频率范围内的低频磁流体波的主频率和行星际磁场强度     

鲜水河断裂带多断层相互作用的流变断裂力学分析

本文研究了流变介质内多断层的相互影响,通过对鲜水河断裂带的分析,对该断裂带提出一个不共线三断层的断裂力学模型.把介质考虑成流变的,用有限元法结合解析方法求解了流变断裂力学问题的应力、应变及能量场的时空变化.结果表明,多断层的力学场与单一断层的力学场相差甚远,在断层间形成了影响区.在影响区内应力集中,梯度大,分布复杂,应变能在影响区内形成较大范围集中.应变能等值线在孕震期间从影响区向外扩张,能量从外围流向断层区,流动在时空上都是不均匀的,孕育初期增加速率大,后期渐渐平缓.流向影响区的能量比其周围区域大,形成很大梯度.并讨论了地震前兆的某些特征.根据本文的结果,认为在道孚-乾宁-带发生地震的可能性较大.     

浅源强震的判据和发震概率

根据确定潜在震源区的多判据原理,强震的发生不仅要满足准静态强度条件,而且必须具备突发释放足够能量的条件,而所有这些条件可以通过突发应力降判据、总能量判据和强度判据加以表达。本文建立了它们相应的概率表达式和估计发震总概率的方法,并针对我国28例地震进行了验算     

闽粤台沿海北西西向最新构造带与大震构造背景

闽粤台沿海自台湾运动以来逐渐形成了多条北西西向隆起—拗陷的最新活动构造带,与已知的北东—北北东向隆起、拗陷带构成了区域性镶嵌构造格局。 研究区内除板块相互碰撞、俯冲及上地幔物质上涌形成大震构造背景外,莫霍面隆起或隆起断距大、低速层厚、地壳变薄、近两、三千年地表抬升差异活动显著以及台东近海有北西西向构造活动等,也都是发生大震的重要构造背景     

云南耿马7.2级地震地表破裂带研究

根据野外考察的实际资料,本文介绍了耿马7.2级地震地表破裂带的展布,结构要素及组合、位移分布等情况。同时依据位错资料对破裂带的应力活动及断裂两盘的运动状态进行了初步分析。认为本次地震发震构造以右旋走滑为主兼具张性,主压应力优势方位为N5°—10°E。断层两盘相对运动的总体方向为N55°W左右,断层运动的滑移角在30°—40°之间     

钛-氨三乙酸-对氯苯基荧光酮-CTMAB四元配合物的分光光度法研究

本文研究Ti(Ⅳ)-氨三乙酸(NTA)-对氯苯基荧光酮(p-ClPF)-CTMAB四元配合物的显色条件。结果表明,在pH5.8—6.6形成了摩尔比为Ti(Ⅳ):NTA:p-ClPF:CTMAB=1:1:3:3的四元配合物,借此反应测定钛,灵敏度高,其ε_(573nm)=2.1×10~5L·mol~(-1)·cm~(-1)。Ti(Ⅳ)浓度在0—1.4μg/10ml范围服从比耳定律。已用本法直接测定了岩矿和铝合金中的Ti,结果满意。     

Influence of local geological conditions on the macroseismic effects in the town of Strazhitza

Damage caused by the earthquake of 7 December 1986 (M = 5.7) and its aftershocks in low-storey residential buildings in the town of Strazhitza, Bulgaria, situated in the epicentral zone are systematized. A scale of damages is compiled for two types of buildings which is coordinated with the MSK-64 scale. The territorial distribution of the seismic intensity is compared with the results of the detailed engineering-geological study. A correlation between the Quarternary deposit thickness and the observed seismic intensity is obtained.Paper presented at the 21st general assembly of the European Seismological Commission held in Sofia, 1988.     

3D chemical model for geological macromolecules

This study defines a chemical representation of the kerogen macromolecule based on data from physicochemical analyses. The model should permit: creation of various schematic drawings representing an average macromolecule; future integration of new analytical results (for instance on structures of biomarkers or biopolymers); and determination of the distribution of chemical bonds.The models developed in this study can be represented in a 3D space, using classical chemical symbols, in the form of cyclic groups linked to each other by aliphatic chains. One cyclic group is a connected set of aromatic, naphthenoaromatic or naphthenic rings. These cyclic groups are constructed using basic elements such as atoms and bonds defined by their length and direction.Modeling of kerogen is done in three successive steps. A library is first created to define atoms, bonds and cyclic groups. Secondly, starting from a set of equations describing the analytical results, cyclic and aliphatic groups are chosen in the appropriate stoechiometric amount to match the analytical data. Finally the construction is done: cyclic groups are placed randomly in a 3D space, connections are made by aliphatic chains, and functional groups are added.The molecular modeling software Xmol^TM can be operated on APOLLO stations. It allows the creation of libraries, the calculation of chemical bonds corresponding to the analyses and the construction of macromolecules. An example is given for a type III kerogen at the beginning of diagenesis.