chengxushejijiaochengmatlab1

提供了外文文献具体解释了HHT得缺陷之一，模态混叠现象。 通过matlab的仿真具体解释了HHT用于信号分析时出现模态混叠的临界点。(english papers to explain one of the limitations of HHT-MODE MIXING simulation base on MATLAB provide graph to improve that limitation)

Designing of Spring mass system

说明：  使用扰动观察法的Simulink光伏仿真，可供参考(Simulink photovoltaic simulation with disturbance observation method can be used for reference.)

This code can be use in fresnelzone of seismic data.

Fourier coherence This program calculates the fourier coherence of a signal using cpsd function of matlab. Input and output are explained in file.

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) )

percobaan sistem komunikasi dengan menggunakan software matlab

说明：  负荷预测 可以修改数据集进行预测谢谢谢谢谢谢(prediction in power election)

MATLAB的非线性数值算法源代码MATLAB nonlinear numerical algorithm source code(MATLAB' s nonlinear numerical algorithm source code MATLAB nonlinear numerical algorithm source code)

基于matlab的2fsk的调制与解调源程序，以及眼图，误码率的计算，相干解调，非相干解调的比较(Matlab-based 2fsk the source of the modulation and demodulation, as well as the eye diagram, bit error rate calculation, coherent demodulation, comparison of non-coherent demodulation)