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利用快速傅立叶算法，实现快速沃尔什-哈达玛变换及其逆变换(Using fast Fourier algorithm, fast Walsh- Hadamard transform and its inverse transform)

本程序实现将一幅高分辨率图像平均分成四幅低分辨率图像，（稍微修改即可任意等分）像素没有损失。(Image division。)

Equalizacao Histograma

利用三电平中心削波自相关法实现清、浊音判定，并提取一段话音的基频参数，绘制基频曲线，并将该参数曲线合并到前面提取的短时过零率和短时能量参数曲线图中(Using a three-level center clipping from the relevant law to achieve clear, voiced determination, and extract some of the fundamental parameters of the voice, drawing the fundamental frequency curve and merge the parametric curve to the front of the extraction rate and the short-term zero short-term energy parameters graph)

This file is used to generate wireless microphone signal. These models of wireless microphone signal are useful in an evaluating the performance of spectrum sensing scheme.

关于谱估计的MATLAB源程序，含各种谱估计的对比(MATLAB source code on the spectrum estimation)

利用偏移量插值实现图像的透视变换（运用了双线性变换原理）(Offset interpolation using the image perspective transformation (using the bilinear transformation principle))

knn 只是个函数实现 需要其它函数的引用(k-nearest neighbor u need to import this function to other functions to run it)

T型三电平逆变器的SVPWM控制以及闭环并网控制仿真(T-type three-level inverter SVPWM control and closed-loop control and network simulation)

本程序是基于bp神经网络的分类程序 开发环境是matlab(matlab)