Distance_Relay

集中介绍了HDC,CDC,CClientDC,CPaintDC,CWindowDC的使用方法和区别，绘图显示效果，区分窗口客户区。(Focus on the HDC, CDC, CClientDC, CPaintDC, CWindowDC to use and distinction, graphics effects, to distinguish the window client area.)

信号频谱分析 1. 观测已知方波信号、正弦波信号的频谱 分析频率为4KHz、8KHz的占空比为50 的方波信号、正弦波信号的频谱。记录所得频谱图。 观测实时模拟信号（语音）的频谱 用音频设备采集一段语音，将语音存为.wav格式。对wav文件作分段傅里叶变换分析。语音是分音节的，应把它分段分析，而且实际运用中的数字信号处理的FFT的点数是有限的，一般只能达到千点。用傅里叶反变换IFFT，从频域恢复信号。画出频谱图和语音波形图(Signal spectrum analysis 1. Observing a known square-wave signal, sine wave signal frequency spectrum analysis 4KHz, 8KHz for the 50 duty cycle square wave signal, sine wave signal frequency spectrum. The recorded frequency spectrum. Observing real-time analog signal (voice) of the spectrum collected with the audio devices section of voice, voice saved as. Wav format. Wav file of the sub-Fourier transform analysis to make. Speech is divided into syllables, it should be sub-analysis, and practical application of digital signal processing of the FFT points is limited, generally only reach 1000 points. Fourier inverse transform IFFT, to restore the signal from the frequency domain. Draw maps and voice waveform spectrum)

说明：  上大学时候的一个习作，是模仿国外一个截图软件做的。它不但可以抓图，而且还可以选择抓图的形状，比如圆形、方形、三角形等。还有其它的一些辅助功能有很多(When one exercises in college, is an imitation of a screenshot of foreign software to do. It can not only drawings, but can also choose the shape of drawings, such as round, square, triangle and so on. There are some other auxiliary functions, many)

matcom衰减振荡曲线（多线程）如果直接运行exe文件,只须将ago4501.dll和v4501v.dll加入相应的release目录即可。(matcom oscillation decay curve (multi-threaded))

unicet和netdraw使用手册，能够较好的学习这两种软件，用于网络绘图(unicet, and netdraw use the manual, better able to learn both software for network drawing)

L曲线选择正则化参数,适用于正则化算法中选取正则化参数反演( L-curve)

该程序包括泰勒线阵及方向图、带宽计算、共形阵列等函数。(Taylor linear array pattern)

MATLAB下绘制三维极坐标图，输入极径和角度范围，还可以选择画图的种类，也可以画等高线图(Draw three-dimensional polar plot using MATLAB.)

基于光学导纳矩阵的多层膜系反射率分析,绘制反射率与波长的关系曲线(Based on the analysis of the reflectivity of the multilayer film system based on the optical admittance matrix, the relationship curve of the reflectivity and wavelength is plotted.)

GM(1,1)的程序,要用就下啥,可以预测的,里面有详细的说明,很容易看懂的！,(GM (1, 1) program, want to use is what, predictable, there are detailed instructions, it is easy to understand!)