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说明：  把AutoCAD的VLX文件反编译成FAS文件(Decompiles VLX files of AutoCAD into FAS files)

用C++编程编写的CAD功能，实现了画线，画面，以及填充多边形等功能。()

随书源代码, 内含（1）CAD基础类库，定义了点、矢量、矩阵等类（2）OpenGL接口类：封装了OpenGL的交互接口，方便上层调用，GCamera方便视图切换，学习OpenGL最好的源码（3）图形类库：定义了图形基类、样条曲线、曲面、STL类（4）样条、曲面、STL文件的载入与显示是CAD软件开发非常好的入门资料

AUTOCAD CHANGE TO ARCGIS

catia 自动重命名工具，再不需要另存文档了(catia auto rename tool)

CAD环境中绘制的变电所主接线图.dwg(Main substation wiring diagram drawn in a CAD environment. Dwg)

its about PSCAD simulations of DFIG

说明：  netDxf是一个用C＃编程的.net库，用于读写AutoCAD dxf文件。 它支持文本和二进制格式的AutoCad2000，AutoCad2004，AutoCad2007，AutoCad2010，AutoCad2013和AutoCad2018 dxf数据库版本。 该库易于使用，我试图使程序尽可能简单，例如，您不需要使用图层，样式或线型定义填充表格部分。 每次添加新项目时，DxfDocument都会处理这个问题。(netDxf is a .net library programmed in C# to read and write AutoCAD dxf files. It supports AutoCad2000, AutoCad2004, AutoCad2007, AutoCad2010, AutoCad2013, and AutoCad2018 dxf database versions, in both text and binary format. The library is easy to use and I tried to keep the procedures as straightforward as possible, for example you will not need to fill up the table section with layers, styles or line type definitions. The DxfDocument will take care of that every time a new item is added.)

CAD删除重复的圆和重复线，只针对同一图层。(CAD deletes duplicate circles and heavy lines, only for the same layer)

主要论述了基于FPGA的末制导雷达伺服系统设计。结合末制导雷达讨论其电机控制、二阶伺服系统性能和PID校正算法,利用VHDL语言设计,实现基于FPGA的方位步进电机开环定位控制和俯仰直流电机闭环速度控制的伺服系统。结合实际应用中遇到的问题,提出了基于"反馈控制"理论的有效的补偿算法,该算法提高了伺服系统的稳定性、快速性和精度。(Mainly discusses the design of terminal guidance radar servo system based on Field Programmable Gates Array(FPGA).It includes the system’s electric machine control,second-order servo system performance and PID correction algorithm based on Virtual Hardware Description Language(VHDL) on azimuth stepping motor open loop positioning control and pitch direct current electric machine closed loop speed control of the FPGA servo system.In allusion to some factual problems during its application,presents corresponding effective solutions based on traditional control theory "Feedback Control".The fact proves that these methods can greatly improve the stability,speediness and precision of the original servo system.Additionally,a basic algorithm which can be realized in a terminal guidance radar servo system is given)