最近有不少人询问下载CASS60版，电脑里面下载的太多,鱼龙混杂的都搞不清楚哪个好用，哪个不好用了，现上传一个我自己用的Cass6.1 For AutoCAD2004版本（也可以CAD2005）。把下载的压缩文件解压缩到一个文件夹下点setup.exe就行了，破解说明也在压缩文件里。
CAD2004就自己到网上下载一个绿色版的就行了，
Auto CAD2013简体中文(64位)破解版安装软件-带详细图文教程，带注册机
AutoCAD2013简称CAD2013,是又AUTODESK公司开发的。全球的设计公司都在使用他。主要用于三维设计，二维绘图和详细绘制等方面，CAD2013具有良好的用户界面，可以通过命令行来操作各种命令。CAD2013具有广泛的适应性，他可以在多操作系统的环境下运行。
This study presents a nonlinear optimization technique (NOT) for conducting the back analyses of geotechnical engineering problems
based on the field observations. Additional auxiliary techniques are incorporated to enhance the convergence and stability of the NOT.
The developed NOT and additional auxiliary techniques are incorporated into a finite element code and then applied to the back analysis
of excavation-induced wall deflection. A number of hypothetical excavation cases with various scenarios of stratigraphy and two quality
excavation case histories are used to validate the developed NOT, in which the dominant soil parameters are treated as target parameters.
Results show that the wall deflections of all hypothetical and actual excavation cases at each stage can be accurately and efficiently backfigured.
