通过jerk的多涡卷混沌

采样频率 fs=10000 轴承外环故障信号 fid=fopen( bearingout.dat , r ) 故障 N=1024 xdata=fread(fid,N, int16 ) fclose(fid) xdata=(xdata-mean(xdata))/std(xdata,1) 时域波形 figure(1) plot(1:N,xdata) xlabel( 时间 t/n ) ylabel( 电压 V/v ) db10小波进行4层分解 一维小波分解 [c,l] = wavedec(xdata,4, db10 ) 重构第1～4层细节信号 d4 = wrcoef( d ,c,l, db10 ,4) d3 = wrcoef( d ,c,l, db10 ,3) d2 = wrcoef( d ,c,l, db10 ,2) d1 = wrcoef( d ,c,l, db10 ,1) ( Sampling frequency fs = 10000 bearing outer ring fault signal fid = fopen (' bearingout.dat' , ' r' ) failure N = 1024 xdata = fread (fid, N, ' int16' ) fclose (fid ) xdata = (xdata-mean (xdata))/std (xdata, 1) time-domain waveform figure (1) plot (1: N, xdata) xlabel (' Time t/n' ) ylabel ( ' voltage V/v' ) db10 wavelet decomposition 4 layer one-dimensional wavelet decomposition [c, l] = wavedec (xdata, 4, ' db10' ) 1 ~ 4 reconstructed detail signal d4 = wrcoef (' d' , c, l, ' db10' , 4) d3 = wrcoef (' d' , c, l, ' db10' , 3) d2 = wrcoef (' d' , c, l, ' db10' , 2) d1 = wrcoef (' d' , c, l, ' db10' , 1) )

基于lcL滤波器的三电平有源电力滤波器（APF）的仿真设计，包括（谐波检测， 电流跟踪环节）（SPWM调制） 离散域(Based on the three-level lcL filter active power filter (APF) simulation design, including (harmonic detection, current tracking link) (SPWM modulation) discrete domains)

单神经元PID对二阶延迟系统的仿真程序。(keyword：single nuron、PID、MATLAB)

几个关于利用傅里叶变换进行谐波分析的代码。有详细的变换过程，比较适合想了解原理的初学者。(Several on the use of Fourier transform for harmonic analysis of the code. The transformation process in detail, more suitable for beginners would like to know the principle.)

说明：  基于u率的压扩变换法降低峰均功率比的误码率matlab仿真源程序(U Based on the rate of compression and expansion transform lower peak to average power ratio of the bit error rate simulation source code matlab)

说明：  实现bpsk在AWGN下的调制与解调，误码率计算。(psk in Rayleigh fading channel simulation model. Simulink achieve. Simulation can see Rayleigh fading channels for BPSK performance impact. And to be compared Rayleigh Channel and AWGN under BPSK performance)

This is the simulation of DC Chopper Circuits.

henon lyapunov graphics for a and b

需要将音乐文件bhk_med.wav放于D盘根目录下才可以直接执行程序，或将程序中的音乐文件路径指向当前目的音乐所在的地址。背景音乐可以更换，甚至可以自行合成。(Music files need to be put in the D bhk_med.wav root directory before you can run the program directly, or to program the music file path to the address of the current purpose of music is located. Background music can be replaced, even on their own can be synthesized.)

在纯数学方法难以求解一个函数的值域时，用遗传算法计算函数的最大值(Pure mathematics is difficult to solve the range of a function, using genetic algorithms to calculate the maximum value of the function)