fisher

画duffing方程的相图，不能保证正确，请大家斟酌使用。欢迎交流。(The phase diagram drawn duffing equation, can not guarantee correct, please use discretion. Welcome to exchange.)

用不同插值方法对数据进行一维插值，通过结果不难看出，不同的插值方法导致不同的插值结果(One-dimensional interpolation data with different interpolation methods is not difficult to see through the results of different interpolation methods lead to different interpolation results)

说明：  四类语音信号的BP神经网络识别： 四个特征信号矩阵合成一个矩阵， 根据BP网络输出找出语音数据属于哪类， 并求出判断正确率(BP neural network to identify four categories of speech signals MATLAB)

基于焊接图片的pca降维，knn分类算法。(Pca-based solder image dimension reduction, knn classification algorithm.)

三种分集增益，最大比合并，选择合并，等增益合并(equal gain combining-spatial diversity )

包含有希尔伯特黄变换的主程序、边际谱的计算方法、并绘制了仿真信号的FFT频谱和功率谱，并调用emd分析方法，绘制了emd分解结果，以及瞬时包络和瞬时频率图，还有Hilbert-Huang谱和Hilbert边际谱( Including the main program of the Hilbert Huang transform, marginal spectrum calculation method, and draw the simulation signal FFT spectrum and power spectrum, and call EMD analysis method, drawn EMD decomposition, and instantaneous amplitude and instantaneous frequency map and Hilbert spectrum and Hilbert marginal spectrum)

对录音信号集 中的某一语音，利用BATLAB设计一美尔例谱算法，并实现。 取信号集 中的一个语音信号：“xxxxxx”，将它作为输入的语音信号来为设计一个美尔倒谱算法，在该算法中，主要设计了以下环节： 1.读入一个语音信号；2.对这个信号归一化；3.对归一化的信号进行加窗处理（这里的矩形窗长度必须为257，重帧长64）；4.进行预加重处理，即通过一个高通滤波器： ；5进行512点的FFT；6.分别取模平方得到功率谱；7.在设计的mel滤波器组中，我采用了25个带通滤波器；8.将得到的功率谱信号通过mel滤波器组，得到相应的25个功率值；9.对这些功率值取自然对数；10.对这些值取离散作弦变换；11.将得到的值去掉直流分量，取其它值作为MFCC参数。 (Concentrated on recording a voice signal, using BATLAB designed Mayer cases spectral algorithm, and implementation. Get a voice signal signal focus: "xxxxxx", will it as input for the design of a voice signal to Mel Cepstrum algorithm in the algorithm, the main design of the following links: 1. Read a speech signal 2. On the signal normalized 3. Of the normalized windowed signal processing (here, rectangular window length must be 257, re-frame size 64) 4. For Pre-emphasis processing through a high-pass filter: 5 for 512 points of FFT 6. modulo square were obtained spectrum 7. in the design of mel filter banks, I use a 25 band-pass filter 8 . will be the power spectrum signal by mel filter bank, corresponding to the 25 power values 9. on the power to take the natural logarithm value 10. to take these values as strings of discrete transform 11. will be of value to out DC component, to take other values as MFCC parameters.)

详细介绍了MATLAB的各种命令的符 联合开发网 - pudn.com

说明：  数学建模的常用算法，包括源代码，是我在建模过程中精心筛选的，希望对大家有所帮助(Mathematical modeling of the commonly used algorithms, including source code, which I carefully screened in the modeling process, and hope to be helpful)

这是一个用基于折线的信赖域方法求解优化问题的matlab程序(This is a matlab program polyline-based trust region methods for solving optimization problems)