fft_compare

《最优阵列处理》一书第四章的MATLAB例程，包括各种平面与立体阵列的分析与合成算法。(" Optimal array processing," a book of Chapter IV of MATLAB routines, including a variety of planar and three-dimensional array of analysis and synthesis algorithms.)

改程序为《自适应信号处理》（Bernard Widrow著，王永德等译）书中101页上图牛顿法的MATLAB程序，仿真效果和书上一致 (Change the program to " Adaptive Signal Processing" (Bernard Widrow a, s Acoustic other translation) book 101 on the map Newton MATLAB programs, simulation results and the same book)

本代码是基于质量弹簧振动系统的BODE图生成的代码 (The code to generate a bode plot of the transfer function of mass-spring system)

利用已知的四阶R-K方法求解高阶常微分方程(Using the known four order R-K method to solve high order ordinary differential equation )

利用Matlab提取图片中的数据 从事科研或者工程的人员在文档撰写过程中，常需要将文献中的曲线与自己的结果对比，为获取原始数据，一种常用的办法是手动描点，即将原始曲线放大然后打印出来，选取一定数量的点，读出其横纵坐标，然后重绘。对于较为平坦的曲线，这种方法当然可行，但当曲线数量增加，曲线变化复杂，这种方法工作量可想而知。前段时间由于原始数据丢失，仅剩几十幅图片，本人尝试过手动描点，经历几个小时奋战，实在无法继续，索性转向matlab，借助其强大的数据处理能力，编写了两个GUI的小软件image2data、data_poly提取数据，如今大功告成，遂于大家分享。(Using Matlab to extract picture data in scientific research or engineering personnel in the process of writing documentation, often need to curve in the literature comparing the results to obtain the original data, a common approach is described in the manual, is about the original amplification curve and then print it out, select a certain number of points, read out its horizontal and vertical coordinates, and then redraw. For a flatter curve, this approach is of course possible, but when the increase in the number of curves, the complexity of the curve, this method can imagine the workload. Some time ago due to the loss of original data, except for the dozens of pictures, I tried manually tracing point, after several hours of fighting, I can not continue to simply turn to Matlab, with its powerful data processing capabilities, the preparation of two GUI software image2data, data_poly extract data, and now you' re done, then share with you.)

数值方法(MATLAB版)(第四版)[Mathews,Fink著,周璐,陈渝,钱方等译](Numerical Methods Using MATLAB)

说明：  有限元的四边形剖分程序，可用于有限元求解磁场，电场等问题是的区域划分中(fem use to answer EMT )

Obscurance Invariance in Template Matching

Characteristics of the closed one-dimensional object 2

介绍matlab的详细画图功能及动画功能，为读者提供快捷的查找资料(Matlab functions described the detailed drawing and animation features to provide readers find information fast)