kdemcode

matlab 神经网络应用设计（第一版）的源代码。(matlab neural network application design (first edition) source code.)

Maximum Likelihood Estimation of Batch Perceptron Convergence

分别用LMS和RLS算法实现回音对消，并比较二者收敛性能，及不同信道参数对算法的影响(LMS and RLS algorithms were used to achieve echo cancellation, and compare the convergence performance of the two, and different channel parameters affect the algorithm)

短时傅里叶变换仿真，步长不同时候的比较图形(STFT simulation)

说明：  微型光伏并网逆变器（包含原理图、PCB与DSP源代码）(Micro PV grid-connected inverter (including schematic, PCB and DSP source code) PV, DSP, PCB)

convert MATHML to SVG

说明：  P1口的8个灯循环亮，按P32后全部闪烁5次后继续循环亮， 中断程序的典型应用。 (P1 mouth of the eight bright light cycles, according to P32, all the flashes five times after the continued cycle of light, interrupt procedures typical application.)

this code is to sample the signal

采用自相关函数法求基音周期，将采样得到的声音信号按每20ms一帧分为若干帧，并对每帧的序列求自相关函数，取自相关函数第一个最大值点算出基音周期，并以帧为横坐标，基音周期为纵坐标画图，并去除野点，最后取图中浊音部分即面积较大部分的值作为基音周期。(Using the autocorrelation function method pitch period, the sound signal is sampled every 20ms frame is divided into a plurality of frames, and each frame sequence uates the autocorrelation function, taken the first maximum point of correlation function calculated the pitch period, and frame as the horizontal, the vertical axis pitch drawing and remove outliers, and finally take the value of the area that is part of a larger portion of the figure as voiced pitch.)

傅立叶变换的matlab实现和傅立叶反变换的matlab实现，入口参数是：t和f，出口参数是f和t(Matlab Fourier Transform and Fourier Transform realize the matlab realize, the entrance parameters are: t and f, the export parameters are f and t)