threephase

有循环检测，周期性检测，时间序列数据分析中的梅林变换工具，最大信噪比的独立分量分析算法。( There are cycle detection, periodic testing, Time series data analysis Mellin transform tool, SNR largest independent component analysis algorithm.)

小波包分析提取振动信号中的特征频率，有均匀线阵的CRB曲线，matlab开发工具箱中的支持向量机。( Wavelet packet analysis to extract vibration signal characteristic frequency, There ULA CRB curve, matlab development toolbox support vector machine.)

本章先分析说明伪谱法求解波动方程的算法原理，再给出弹性波场伪谱法数值模拟的改进算法；然后，通过直接引入P波波场变量和S波波场变量，给出可实现弹性波场的P波和S波分解的波动方程，并用伪谱法实现弹性波场的P波和S波分解的数值模拟；最后用伪谱法对井间地震的复杂波场作数值模拟，分析井间地震波场中各种波的传播规律。(In this chapter, the principle of pseudo-spectral method for solving wave equation is analyzed, and then an improved algorithm for numerical simulation of elastic wave field is given. Then, by directly introducing P-wave field variable and S-wave field variable, the wave equation which can realize P-wave and S-wave decomposition of elastic wave field is given, and the P-wave sum of elastic wave field is realized by pseudo-spectral method. Numerical simulation of S-wave decomposition; finally, pseudo-spectral method is used to simulate the complex cross-well seismic wave field and analyze the propagation law of various waves in cross-well seismic wave field.)

应用傅里叶变换DFT，分析各种离散信号x(k)的频谱。离散周期信号可以展开成傅里叶级数，所以离散周期信号的频谱 是一个周期的周期性离散频谱，各谱线之间的间隔为 ，而且存在着谐波的关系。 (DFT application of the Fourier transform, analyze discrete signal x (k) of the spectrum. Discrete signal cycle can begin as Fourier series, the discrete signal spectrum is a cyclical cycle of discrete spectrum, the line between the interval, but there is a harmonic relationship.)

FEM(1D) for waveguide vb-curve

这个是对16QAM各种界的一个整理，给出了仿真程序，对于初学者来说具有重要的意义。(This is a finishing 16QAM various circles, the simulation program, for beginners is of great significance.)

地震波处理并画图，matlab编程的小程序(Seismic processing and drawing, matlab programming, small programs)

This is matlab code for generation of OFDM symbol using QAM modulation scheme

这是一个电力系统三相变压器的matlab/simulink仿真模型(This is a matlab power system three-phase transformer/simulink simulation model)

OFDM系统中用PTS算法降低系统的峰值平均功率比(OFDM system PTS algorithm used to reduce the peak-to-average power ratio)