optical1

这是瑞利信道中有关多普勒频移的多径信道和单径信道的相关matlab仿真程序,(This is relevant in Rayleigh channel doppler frequency shift of channel multipath channel and a single diameter related matlab simulation program,)

Three Phase load with Externally controlled Variable Source with PSCAD

用vc+mapobjects开发的源代码，实现鼠标多边形的移动(with vc MapObjects development of the source code, mouse polygon mobile)

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)

这是一个图形学应用的小程序，可以实现简单的填充功能。(This is a small graphics application procedures, can be filled with simple functions.)

pscad application course

DCAC INVERTER MODELLING BY PSCAD/EMTDC

thus are show you a different of graphic between bit error rate and signal noise to ratio

pscad编写风机逆变侧模型包括风机，逆变器。简单实用，可以参考(pscad preparation model includes blower fan inverter side, an inverter. Simple and practical, you can refer to)

实现了DDA直线生成算法画直线，Bresenham圆弧生成算法画圆弧(Achieve DDA line drawing algorithm to generate a straight line, Bresenham algorithm for drawing arcs arc generated)