GDI

自动绘制保护煤柱,CAD 二次开发的，输入参数后，自己就绘制出来了(Automatic drawing protection pillar, CAD secondary development)

飞机强度计算中的有限元与CAD_CAM一体化的讲解说明的课件，很有用的，大家下载看看吧(Aircraft strength calculation of the integration of finite element and CAD_CAM explained that the courseware, very useful, we look at it download)

DDA算法画直线，可以实现在网格下逐点画直线。(DDA algorithm for drawing straight lines, can be achieved in a grid-by drawing straight line.)

使用matlab编写的根据圆心坐标画圆，且填充颜色(Using Matlab prepared according to the center coordinates of the circle, and fill color)

poiseuille的LBM模拟，C++，三种边界处理方法。周期、反弹、曲线。(LBM simulation poiseuille s, C++, three border approach. Cycle, rebound, curve.)

建筑铝合金模板楼面布板，基于cad平台二次开发，使用lisp语言。(Building Aluminum Alloy floor layout template)

PSCAD仿真,可以设置各种故障,故障类型可以自由设置,并且得到故障仿真图形,本程序中附有单相故障(PSCAD simulation, you can set a variety of failures, fault types can be set free, and get fault simulation graphics, the program with a single-phase failur)

这是国外的同行编写的画图板程序，感觉比陈建春的要好些，说实话研究了半天，发现国内的cad水平低不是因为国内的人笨，主要是国外的cad技术不能很快的传递到国人手中，总是参考陈建华等水平有限，工程水平差的书籍造成整体水平低，书中没有详细的流程图，和软件设计思路，而且代码错误连篇。(This is the foreign counterparts of the drawing board to prepare procedures, CHEN Jian-chun than feeling the need to better tell the truth for a long time study and found that low levels of domestic cad because people are not stupid, mainly abroad cad technology should not quickly delivered to the the hands of the people always refer to Chen Jianhua, such as the limited level, engineering level difference caused by the overall level of books low, the lack of a detailed flow chart of the book, and software design, and code errors pack.)

在前人工作的基础上对三层层状介质的瑞利波频散曲线进行了正演模拟研究，对假定的几组典型模型参数的频散曲线进行了认真分析。通过分析可知，各频散曲线之间是互不相交的，从而对此问题有了一个更清晰的认识。指出当低速软弱夹层存在时频散曲线的特点，并根据分析结果，说明”之“字形频散曲线的形成机理。(On the basis of previous work, the Rayleigh wave dispersion curves of three layered media are studied by forward simulation, and the dispersion curves of some assumed typical model parameters are carefully analyzed. Through the analysis, we can see that the dispersion curves are not intersected with each other, so we have a clearer understanding of this problem. It is pointed out that the characteristic of time dispersion curve exists in low-speed weak interlayer, and according to the analysis results, the formation mechanism of zigzag dispersion curve is explained.)

cadence layout中快捷键的归纳总结，希望能对大家有点用(cadence layout in summary of shortcut keys, hoping to use a bit of everyone)