QPSK

it is based on pv system.it is a hybrid powr system

通过多种方法对滚珠轴承内圈和外圈故障进行诊断，分析故障频率(This program demonstrates how you can analyze the operation of a bearing, and how faults can be found by means of Signal Processing.)

matlab function? for example imnoise3, lpfilter and other

matlab关于幂法和反幂法以及原点平移加速的源代码(matlab translational acceleration of the source code on the power method and inverse power law, as well as the origin)

Bifurcations of circle maps: Arnol d tongues, bistability and rotation intervals

说明：  基于奇异谱的齿轮箱振动信号分析，含主程序及熵值函数。(The vibration signal analysis of Gearbox Based on singular spectrum includes main program and entropy function.)

太极孔阵列的光头过率计算，有4*4的阵列组成，边界位upml pml(Tai Chi Kong array bald too rate, 4* 4 arrays, the boundary upml pml)

retinex阴影去除 non linear processing on the image by the commercial camera used Sensors are not Dirac Delta Functions but narrow band Approximate invariant angle is obtained by the entropy minimization mehtod. Exact angle can only be found by camera calibration method(retinex shadow removing，non linear processing on the image by the commercial camera used Sensors are not Dirac Delta Functions but narrow band Approximate invariant angle is obtained by the entropy minimization mehtod. Exact angle can only be found by camera calibration method)

说明：  用多层前向网络的BP算法拟合函数 说明：1）网络结构为三层（输入层、1个隐层和输出层）； 2）获取两组数据，一组作为训练集，一组作为测试集； 3）用训练集训练网络； 4）用测试集检验训练结果。(Fitting the function with BP algorithm of multilayer forward network)

LDPC码的matlab实现，把解码的部分改过了，实验过很多次，符合理论要求，码长越长误码率越低(The implementation of LDPC code in MATLAB has changed the decoding part. It has been experimented many times and meets the theoretical requirements. The longer the code length, the lower the bit error rate.)