411FJ5

拟合曲面，先输入已知数据，拟合出系数，再带入未知点的X,Y坐标进行计算！(fitting surface, known to input data, fitting out factor, again into the unknown point of the X, Y coordinates calculated!)

AUTOCAD 程序员使用的，ARX图纸数据结构显示(AutoCAD programmers using the data structure ARX drawings show)

Matlab绘图教程(大量实例PPT)，可供初学者绘图使用，简单方便。(Matlab graphics tutorials (large number of examples PPT), drawing for beginners to use, simple and convenient.)

用Origin C, 操作origin 中的Graph对象。(Using Origin C to access the graph object in origin.)

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)

这是我做的10KV变电站标准设计图纸，包括电气主接线等，用的AutoCAD画的，朋友们可以放心下载，已经通过了毕业答辩。(This is what I do 10KV substation standard design drawings, including the main electrical wiring, etc., with the AutoCAD drawing, and friends can rest assured download, has passed the graduation reply.)

改进的Bresenham算法，用visual c++ 实现(Improved Bresenham algorithm, using visual c++ achieve)

基于最小均方误差准则的小波包树结构的选择 仿真程序(Based on minimum mean square error criterion selection of wavelet packet tree structure simulation program)

泽尼克多项式仿真， 模拟大气湍流，k为与大气有关参数，以彩色曲线绘制(Zernike polynomials simulation)

说明：  DXF文件格式说明，包中包含了dxf文件的所有组码的解释(DXF file format description)