read--radiosonde-data

CAD下VBA二次开发，用来展高程点，txt文件，已经把离散点网格化了(CAD lower VBA secondary development, to show elevation point, txt file, has the discrete points of the grid)

用m文件绘画伯德图，利用hold on命令可以绘画多个伯德图，然后进行频率响应对比。(plot Bode diagram by m file)

本代码实现两段贝切尔曲线的拼接，这里会分别显示两段曲线，再显示拼接后的曲线。(The code implements the splicing of the two sections Bei Qieer curve, and here are two curves, and then display the mosaic curve.)

计算机图形学实验，完成立方体的三视图和等轴侧投影(Computer graphics experiments, the completion of three cube view and isometric projection)

OpenSceneGraph Quick Start Guide(The OpenSceneGraph the Quick Start Guide)

lighting simulation in pscad

又来了~~继上次之后的又一重磅出击，本程序也是图形填充(Here we go again ~ ~ Following the last after another heavy attack, the process is filled with graphics)

直接将坐标展在cad中和南方cass中的一功能相似，只是直接在cad中就直接能实现该功能。(Directly coordinate the event in cad and in the South cass of a function similar to, but directly in the cad on directly to achieve this feature.)

该程序是用C 语言编写的图形学中的贝济尔曲线,简单实用易懂(this program is Bezier program about computer picture,wich is degn by c.)

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)