frechet

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)

线性纽马克法,用于对地震波进行反应谱的绘制(linear newmark method)

CAD批量打印源码程序，例程结合易语言应用接口支持库、拖放支持库、扩展功能支持库，创建Autocad.Application对象，实现CAD对象的属性、方法，可以批量打印。(CAD batch printing source programs, routines combined with easy language support library application interface , drag and drop support libraries , extensions support library , create Autocad.Application object implementing the CAD object s properties , methods, you can batch print .)

DDA方法的绘制直线 圆的绘制 曲线的绘制等(tu xing xue)

结合VS2010和TeeChart v5控件读取txt文件数据并画曲线图。可以画2条以上的曲线图，也可以修改曲线图的颜色。(Combine VS2010 with TeeChart v5 to read TXT data and draw graph.It can draw more than 2 curves and also can modify the color of the curves.)

三次样条插值绘制光滑曲线，很有用的代码希望对大家有用(Cubic spline interpolation to draw a smooth curve, useful code hope to be useful)

根据图框块自动识别图纸并预览打印。函数参数分别为：打印机名称，打印样式，打印纸张，打印份数，自动纸张，自动旋转，自动关闭，自动识别图框(Autoprint according to the drawing blocks.)

数据融合，读取数据之后融合，组合数据融合(The level demand, information transmission and data fuse of system were mainly discussed)

基于Bresenham算法的四步画直线算法,加快画直线速度(draw line based Bresenham update alogrith)

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))