niefen_V0.1

说明：  快速傅里叶变换的子程序，直接在主函数中调用即可直接绘制信号的频谱图。(The subroutine of the fast Fourier transform can directly draw the spectrum of the signal by calling it directly in the main function.)

应用matlab GUI编程的俄罗斯方块！(Matlab GUI application programming Tetris!)

三角波及其频谱三角波及其频谱三角波及其频谱(The triangle spread the spectrum)

在图像处理实验中，有时需要对图像进行精确质量因子的JPEG压缩，而photoshop和一般的图像处理软件并不具备，本程序利用matlab实现该功能，并支持批处理(将待处理图像放入src文件夹，dst文件夹为输出)(In image processing experiments, sometimes the need for accurate image quality factor of JPEG compression, and photoshop and general image processing software does not have this program using matlab realize this function, and supports batch processing (image to be processed into the src folder, dst folder for output))

该程序用于地球物理层析成像及反演，也可在工程优化问题得到应用。(The procedure for geophysical tomography and inversion, can also be applied in engineering optimization problems.)

基于有限序列的复杂性,说明有限序列的复杂性与哪些参数有关(on the complexity of finite sequences)

近似熵与样本熵的计算程序，还有快速计算样本熵与近似熵的程序(Approximate entropy and sample entropy calculation procedures, as well as the rapid calculation of sample entropy and approximate entropy program)

说明：  matlab的svm中使用的交叉验证函数（kfold），一般libsvm数据包中没有，需要自己加入(The svm matlab to use the cross-validation function (kfold), general packet libsvm no need to add yourself)

先进PID控制及其MATLAB仿真 源程序(Advanced PID control and MATLAB simulation)

说明：  通过灰色关联分析理论，得到灰色关联度，直接输入数据即可得到结果。(Calculation of correlation degree by grey correlation analysis)