有一维数据和二维数据的DFT和IDFT，还有线性相关，循环相关，线性褶积，循环褶积，这些的计算，还有几个一维滤波器，和简单的去噪。有说明的文件和代码文件，大家可以参考。
There are DFT and IDFT for one-dimensional and two-dimensional data, as well as linear correlation, cyclic correlation, linear convolution, and cyclic convolution. These calculations include several one-dimensional filters and simple denoising. Explained files and code files, everyone can refer to them. (2024-04-24, matlab, 1701KB, 下载1次)
可仿真四维的混沌电路，x-y，x-z，x-w，维数都可出图
Can simulate four-dimensional chaotic circuit, X-Y, x-z, X-W, dimensions can be drawn (2021-04-13, matlab, 1KB, 下载2次)
使用小波变换对脑电信号ssvep进行分解，小波基使用db5小波基，获取细节系数和近似系数
Wavelet transform is used to decompose SSVEP, and db5 wavelet basis is used to obtain detail coefficients and approximate coefficients (2021-03-21, matlab, 53KB, 下载5次)
这是一个一维分数阶傅里叶变换的经典算法，加了一些注释。
This is a classic one-dimensional fractional Fourier transform algorithm with some notes. (2021-01-28, matlab, 1KB, 下载1次)
用WLD提取图像特征。对于给定的一幅图像，通过对每个像素进行这两个分量的计算来提取其差分激励图像和梯度方向图像，并将这两部分组合成一个二维直方图，进而转化为一个一维直方图，最后利用一维直方图进行分类
Extracting image features with WLD. For a given image, the differential excitation image and gradient direction image are extracted by calculating the two components of each pixel, and the two parts are combined into a two-dimensional histogram, which is then transformed into a one-dimensional histogram. Finally, the one-dimensional histogram is used for classification (2021-01-24, matlab, 1KB, 下载1次)
此代码对图像进行sift特征提取，最终提取的特征向量时n*128维的
Image segmentation, including a variety of segmentation tools and trees (2020-12-17, matlab, 2969KB, 下载1次)
Matlab可以使用fitrsvm创建回归支持向量机模型。fitrsvm在中低维预测变量数据集上训练或交叉验证支持向量机（SVM）回归模型。 fitrsvm支持使用内核函数映射预测变量数据，并支持通过二次编程实现目标函数最小化。要在高维数据集（即包含许多预测变量的数据集）上训练线性SVM回归模型，请改用fitrlinear。
Matlab can use fitrsvm to create regression support vector machine model. Fitrsvm trains or cross validates the support vector machine (SVM) regression model on the medium and low dimensional prediction variable data set. Fitrsvm supports the use of kernel function mapping to predict variable data, and supports the goal function minimization through secondary programming. To train a linear SVM regression model on a high-dimensional dataset (that is, a dataset containing many predictors), use fitrlinear instead. (2020-07-29, matlab, 121KB, 下载22次)
PCA降维，基于稀疏表示和支持向量机的人脸识别。
PCA dimension reduction, face recognition based on sparse representation and support vector machine. (2020-07-09, matlab, 589KB, 下载5次)
标准mh抽样算法程序，可进行贝叶斯的一个基础模拟
Standard mh sampling algorithm program (2020-05-20, matlab, 1KB, 下载0次)
巴特沃斯低通滤波器，假设一个信号x(t)=sin(2*pi*f1*t)+sin(2*pi*f2*t)，
Butterworth low-pass filter (2020-05-17, matlab, 271KB, 下载1次)
假定某个局部区域细胞识别中正常w1和非正常w2
两类先验概率分别为：
正常状态：P(w1)=0.9 ；
异常状态：P（w2）=0.1 。
现有一系列待观察的细胞，其观察值为：
-2.67 -3.55 -1.24 -0.98 -0.79 -2.85
-2.76 -3.73 -3.54 -2.27 -3.45 -3.08
-1.58 -1.49 -0.74 -0.42 -1.12 4.25
-3.99 2.88 -0.98 0.79 1.19 3.07
两类的类条件概率符合正态分布，P(x|w1)~N(-2,1.5), P(x|w2)~N(2,2),
风险决策表为λ12=7,λ21=2,λ11=λ22=0。
1）依据最小错误率的贝叶斯决策对观察的结果进行分类。
2）依据最小风险的贝叶斯决策对观察的结果进行分类。
1) According to the Bayes decision of the minimum error rate,the observation results are classified.
2) According to the Bayesian decision of minimum risk, the observed results are classified. (2020-04-29, matlab, 659KB, 下载2次)
教学演示程序： 一维离散信号FFT/IFFT，如语音信号作为例子的离散信号
Teaching demonstration program: one-dimensional discrete signal FFT/IFFT, such as voice signal as an example of discrete signal (2019-06-14, matlab, 1KB, 下载0次)
每组数据为25维，第1维维类别标识，后24维为语音特征信号。然后把四类语音信号何为一组，抽取1500组数据作为训练数据，500组数据作为测试数据，并对数据进行归一化处理。根据语音类别标识设定每组语音信号的期望输出值，如标识类为1时，期望输出向量为[1 0 0 0]。
Each group of data has 25 dimensions, the first dimension is identified by category, and the last 24 dimensions are speech feature signals.Then, select one group of four speech signals, extract 1500 groups of data as training data and 500 groups of data as test data, and normalize the data.Set the expected output value of each group of speech signals according to the speech category identification. For example, when the identification class is 1, the expected output vector is [1 0 0 0]. (2019-01-17, matlab, 372KB, 下载1次)
关于am调制解调的matlab系统仿真代码，已经加噪声的，子函数全部在压缩包内
Am modulation matlab code plus noise (2019-01-08, matlab, 4KB, 下载2次)
这是物探直流电测深正演程序， 输入各个地层参数（电阻率和层厚），即可得到视电阻率。
This is geophysical direct current sounding program, and the apparent resistivity can be obtained by inputting various formation parameters (resistivity and layer thickness). (2018-06-02, matlab, 1KB, 下载10次)
生成相关图像，用最速下降法进行30维，以及产生元胞
Generate related images, use the steepest descent method for 30 dimensions, and generate cells (2018-05-21, matlab, 1483KB, 下载0次)
取任意整数，若为偶数，则用2除；否则乘3加1，重复此过程，直到整数 变为1。
Take any integer, if it is even, then divide it by 2, otherwise multiplying 3 and 1, repeat the process until the integer becomes 1. (2018-04-30, matlab, 109KB, 下载1次)
求时间延迟，lorenz系统为例子，重构相空间，选取维数
Time delay, Lorenz system as an example (2018-02-01, matlab, 5KB, 下载5次)
用五点差分解拉普拉斯方程，效果非常的好，值得下载
With a five-point difference solution of Laplace equation, the effect is very good, worth downloading (2014-07-31, matlab, 1KB, 下载5次)
这个程序描述了一个一到六阶的巴特沃斯低通滤波器以及其幅频特性。即滤波器的设计
This procedure describes a one to six-order Butterworth low-pass filter and its amplitude-frequency characteristics. The filter design (2011-01-06, matlab, 3KB, 下载38次)