CDSN地震事件数据格式的自动变换

在取得ＣＤＳＮ数据之后，所遇到的第一个问题就是数据的格式变换，本文介绍了ＣＤＳＮ数据格式变换的全自动方法，采用Ｃ＿ＦＯＲＭ命令无需提供输入文件名和输出文件名就可以进行格式变换。     

工程建设场址地基勘探的一种新方法─—电磁波井间层析成像技术

本文介绍了电磁波井间层析成像（ＣＴ）技术的基本原理、观测技术及其作用。利用ＣＴ井间层析成像技术对鞍山体育馆与三家子地区输油管道等场址进行了实际观测，由资料分析可知，该方法对探测地下岩溶、断层或破碎带等有良好的效果。     

遗传算法在确定震源位置中的应用

地震定位需要震源的空间坐标和发震时刻，可以通过使观测走时和计算走时的拟合差达到最小来实现。遗传算法是解决此最优化问题的有效方法。本文对遗传算法确定震源位置的基本思路思路进行了说明和分析，讨论了拟合差随迭代次数的分布特征，最后，给出了最优化过程搜索震源位置在四维空间的分布。     

非绝热条件下适定性系统的相轨道分析

利用相法分析了简单的非绝热条件下的适定性系统的相轨道。结果表明:在非绝热条件下,适定性系统的特征方程显示了复杂性;中心点的周期性相轨道,在一定条件下可转换为非周期的相轨道,除了错位转移外,还会因能量的微小差异而发生不同轨道的转换.     

辽宁弓长岭中太古代片麻状花岗岩和铬云母石英岩的锆石年龄

应用离子探针质谱技术,从弓长岭地区片麻状花岗岩和铬云母石英岩中的锆石分别获得3.0Ga和3.1—3.4Ga的年龄数据,前者代表片麻状花岗岩的侵入年龄,后者代表铬云母石英岩母岩形成年龄的下限值。在片麻状花岗岩中,有少量锆石还测得3.3—3.6Ga的年龄,可能表明它们来自更为古老花岗质岩石的继承锆石。这些年龄数据的获得,为深入研究本地区早期地壳的形成与演化、在更大范围内寻找早中太古代古老岩石、确定碎屑沉积岩与母岩的关系等都具重要的意义。     

察尔汗首采区卤水中锂同位素组成

本文详细研究了察尔汗首采区卤水及其周边水源中的锂同位素组成,结果表明,察尔汗首采区平均δ~6Li值为-30.5‰,与海水的δ~6Li值相似,这样低的δ~6Li值与首采区卤水中发生的锂同位素分馏有关,且受具有低δ~6Li值的周边补给水的影响。     

The phenomena of bifurcation and catastrophe of large-scale horizontal motion in the atmosphere under the effect of Rossby parameter

The stability question of large-scale horizontal motion in the atmosphere under the effect of Rossby parameter is discussed in this paper by using the qualitative analysis theory of ordinary differential equations. The following as-pects are reviewed: The stability of large-scale horizontal motion in the atmosphere accords with the common inertial stability criterion when the effect of Rossby parameter is not considered (Yang, 1983), and that, on the other hand, the motion will bifurcate two times with the variation of absolute vorticity of basic Zephyr flow at the initial position under the effect of Rossby parameter. Furthermore, in the inertial stable region, if the effect of geostrophic deviation at the initial position is considered, the motion will not only bifurcate but also generate a catastrophe.     

Groundwater Behaviour in Layered Slope Rock Mass And Finite Element Simulation

The paper deals with the relatively weak permeable layer in a layered structure of a slope rock mass and itseffect on groundwater behaviour in the rock mass. When the whole groundwater table is declined in such typeof slope rock mass, the permeability of the relatively weak permeable layer in the middle will be several timeslower than that of the upper and lower permeable layers and consequently the water level in layers of differentpermeability will fall in different rates which will lead to a discontinuous phenomenon of the water body. Amethod of finite element simulation on a vertical two-dimensional profile is suggested for the study of the phe-nomenon and its application to practical situation is described. The calculation result shows that the existingweak permeable layer in a layered slope rock mass exerts unnegligible influence on the variation of water levelin the rock mass of a slope. The result also proves the applicability of the finite element simulation method.     

滇01井水位动态与地震关系的分析研究

滇01井近年来多次住滇东断裂系上地震前有较好的反映,为了揭示该井水位映震关系,作者对观测以来6年的资料开展了单井区域地质、水文地质条件、水位正常动态、异常动态特征的分忻研究,并利用多种数学方法判定异常,总结了11次震例,提出了该井异常、预报指标,还对映震能力作了分析。     

THE ROLE PLAYED BY WASH LOAD DEPOSITION IN THE FORMATION OF DIFFERENT RIVER PATTERNS

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