layering

Based on the layered visco_elastic soil model, according to the Terzaghi s one dimensional consolidation theory, by the method of Laplace transform and matrix transfer technique, the problems about the consolidation of layered and saturated visco_elastic soils under arbitrary loading were solved.

针对成层粘弹性地基模型 ,运用Laplace变换及矩阵传递法求解了任意荷载下成层粘弹性地基一维变形问题 ,得到了频域内的通解 ,通过Laplace逆变换 ,即可计算成层粘弹性地基在任意荷载下的一维变形·　Terzaghi一维固结理论解是本文的一个特例·　结合三层地基的算例 ,可以看到粘弹性地基的固结相对于弹性地基有个滞后过程 ,但随时间最终趋于一致 ;循环荷载下粘弹性多层地基固结时 ,其有效应力和变形都呈振荡增长 ,且不与荷载同步 ,而要相对滞后·　此外 ,通过一工程实例 ,对该方法的可靠性进行论证 ,以证明该法确能指导工程实

One-dimensional model for contaminant diffusion through layered media;

原始土层影响下成层介质污染物一维扩散模型

The paper begins with the propagation of Rayleigh wave in the media with surface layer, educes that the Rayleigh wave have the property of dispersion in layered media.

从瑞雷面波在具有表面层介质中的传播情况入手,得出成层介质中的瑞雷波具有频散特性。

X-ray line scan acrossthinner sample provides a relative accurate technique to determine stratified structure containing different amount of iodide.

横扫过薄样品的X-射线线扫描提供了一个比较准确的测定含有不同碘量成层结构的技术。