Romberg-sf

用PEG构造法生成LDPC监督矩阵的程序(With PEG construction method to generate LDPC matrix program oversight)

功率谱估计 信号为两个正弦信号加高斯白噪声，各正弦信号的信噪比均为10dB，长度为N，信号频率分别为 和 ，初始相位 ，取 ， 取不同数值：0.3，0.25。 为采样频率。分别用Levinson递推法和Burg法进行功率谱估计，并分析改变数据长度、模型阶数对谱估计结果的影响。(Power spectrum estimation signal into two sinusoidal signals applied Gaussian white noise, the SNR of each sinusoidal signal are 10dB, a length of N, respectively, and the signal frequency, initial phase, take, take different values: 0.3,0.25. Is the sampling frequency. Levinson recursive method were used and Burg method for power spectrum estimation, and change the length of the data analysis, the impact on the estimation model order spectrum.)

pca算法，有详细注释，通过光谱区分苹果酸甜度，对于想学习pca算法的初学者，有很大帮助(pca algorithm, detailed notes, by spectroscopic distinguish sour apple degree, want to learn pca algorithm for beginners, there are a great help)

内含心电信号数据及运用MATLAB写的源代码，是国外的成品模型，小波包分析提取振动信号中的特征频率。( ECG data and includes source code written in MATLAB, Foreign model is finished, Wavelet packet analysis to extract vibration signal characteristic frequency.)

2D fdtd time-domain (FDTD) program

关于直流电机的空载特性的matlab仿真，采用的是样条插值算法对曲线进行拟合，初学者可以改为其他拟合方式看结果如何(With regard to the no-load characteristics of DC motor matlab simulation, using the spline interpolation algorithm, beginners can be fitted into other ways to see the results)

Base class for file system resource items (Folders, Files).

主成分分析，进行主成分分析，使用MATLAB进行主成分分析。(main compeneont analysis)

说明：  数字信号处理中常用的线性卷积和互相关运算(Digital signal processing used in the linear convolution and cross-correlation computation)

本程序实现多模态故障检测与故障诊断，用的方法是PCA_GMM，GMM是用的FJ算法，效果很好(This procedure realize multimodal, fault detection and fault diagnosis method is PCA_GMM, GMM FJ algorithm is used, the effect is very good)