yuputu

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)

PSCAD平台上搭建的一个简单的光伏发电模型(A simple model of photovoltaic platform to build on PSCAD)

观察Autocad内部数据组织的最佳工具,这个对应Autocad2(observation Autocad internal data organization the best tools, and corresponding Autocad2)

画图程序,你可以参考上面的代码编写绘制直线，圆，椭圆和矩形，此外，还可以绘制文字和调节颜色(Drawing program,you can draw line,rectangle,ellipse,triangle,and other things,also,words,and color you can sellect)

说明：  利用matlab绘制ROC曲线图，需要的同学们可以自行下载。(ROC curve drawing with matlab,students who need it can download it by themselves.)

石墨烯表面等离子体传感器曲线模拟程序！！！！！！(spr based on graphene)

说明：  在大型机上使用NCL画WRF模式运转结果的雨量图(Use NCL to draw rainfall map of WRF mode operation result)

pscad做的整流器控制模型，运行效果良好(Rectifier control model of PSCAD, good results)

Gompertz（龚伯次）曲线模型被广泛应用在预测中，该代码实现了G曲线的预测功能。(Gompertz curve is widely used in prediction, this code will help achieve the Gompertz curve prediction function.)

c++图形的绘制(曲线图.饼状图.柱状图) 以及 图形的打印 与打印预览(c++ graphics rendering (curves. caky Fig. histogram), and graphics printing and print preview)