( 2 ) in order to reflect the character of deformation of soil precisely , the modulating coefficient * ~ is introduced in this paper , so the mutilayered elastic half space model and winkler model are united , then a method to gain ~ which can be applied in practical situation is illuminated （ 2 ）为更好的反映地基土的实际变形扩散特性，本文引用了修正系数的概念，从而把多层弹性半空间地基模型和文克尔地基模型统一起来，并提出了一种可供工程实用的的确定方法。
By means of " conjunction " , the model of this problem is established . and then a series of fredholm integral equations of first kind can be set up in terms of the green ' s function , furthermore the scattering problem of sh - wave by cavity in the interface is transformed into a series of algebraic equations based on the direct - discrete method 按“契合”的方式构造出在两个性质不同的弹性半空间交界面上的任意形孔洞对sh波散射的模型，利用green函数建立求解问题的定解积分方程组，并用直接离散的方法将其转化为代数方程组进行求解。
It detailed analyzes the characteristics of symmetric semi - space , layered telluric medium of transient electromagnetic methods , deduces apparent resistivity ( ps ) formulae of earlier , later and whole stage channels , it also analyzes and deduces the tem response effect of local conductive body in high resistance medium and its apparent resistivity formula , inquires into the causing reason , distinguishing method and the way of eliminating or reducing its effect of tem additional effects 第二章瞬变电磁法的理论基础，较详细地分析了均匀半空间、层状大地瞬变电磁场的特征，推导了早期、晚期及全期道视电阻率s公式；以及高阻围岩中局部导电体的瞬变电磁响应和相应的s公式推导。
1 . existing foundation models are analyzed and generalized in accordance with the stress mechanism . some linear elastic foundation models available are chosen to process the pile foundation design , mainly about the winkler foundation model , the elastic semi - space model and the tiered foundation model 1 .根据土的受力机理,对已有的地基模型进行了分析归纳,选择较简单、但具有一定实际可操作性的线弹性地基模型,主要为文克勒地基模型、弹性半空间模型、分层地基模型等进行桩基设计。
The paper analyzes the vertical stresses in soil based on geddes " assumption and stress formula , because the equivalent deep foundation is not appropriate when the lengths of piles are different . but the stress of bottom of pile is not accurate , so this paper modifies the fomula by integrating the mindlin formula . considering the model of elastic analysis method is different from the practice , correction factors nu n are introduced to get more accurate stress in soil 对于这种方法在分析桩端应力时出现应力集中的现象，对mindlin解重新积分来修正附加应力系数公式，以避免这种现象；由于弹性半空间和实际情况之间的模型误差会带来附加应力差距，通过大量的计算分析提出了修正系数m 、 n ，并给出了m 、 n随桩径、计算点深度变化的函数关系，最终使得应力的计算结果与有限元的计算结果十分吻合，而计算相对比较简便。
Based upon the forward simulation principle of ground penetrating radar , this article analyzes the realization method of the half grid spacing and the half time increment in difference format , at the same time analyzed the produce of the numerical frequency dispersion , then deduced the ideal frequency dispersion relationship and the super absorbing boundary condition 摘要本文从地质雷达正演原理著手，分析了差分格式中半空间步长与半时间步长的实现方法，同时通过分析数值频散的产生，进而推导出了理想频散关系和超吸收边界条件。
