DATA-Encryption-AES

说明：  （1）应用9×9的窗口对上述图象进行随机抽样，共抽样200块子图象； （2）将所有子图象按列相接变成一个81维的行向量； （3）对所有200个行向量进行KL变换，求出其对应的协方差矩阵的特征向量和特征值，按降序排列特征值以及所对应的特征向量； （4）选择前40个最大特征值所对应的特征向量作为主元，将原图象块向这40个特征向量上投影，所获得的投影系数就是这个子块的特征向量。 （5）求出所有子块的特征向量。 ((1) the application of 9 × 9 window of these images at random, a total sample of 200 sub-image (2) all sub-images according to out-phase into a 81-dimensional row vector (3) all 200 lines for KL transform vector, derived its corresponding covariance matrix of eigenvectors and eigenvalues, in descending order by eigenvalue and the corresponding eigenvector (4) a choice to 40 corresponding to the largest eigenvalue eigenvector as the PCA, the original image block to the 40 feature vectors on the projection, the projection coefficients obtained by this sub-block eigenvector. (5) calculated for all sub-block eigenvector.)

model of brusslesh dc moter

说明：  实现一阶Keystone变换，包含三种方法，分别是DFT+IFFT方法，sinc插值方法和chirp-Z方法(Three algorithms for perform keystone transform, including DFT+IFFT, sinc interpolation and chirp-z transform.)

this is a folder containing algorithms and source codes for face recognition

matlab程序，PM标准扩散源码，好不容易才找到的(matlab program, PM standards for the proliferation of source code, hard to find the)

奈曼皮尔逊准则仿真，在P(H1|H0)=a的约束条件下，使P(H1|H1)最大的准则。(Neyman-pearson criterion)

点目标的回波仿真，有详细的说明，对学习和理解SAR信号很有帮助。(Point target echo simulation, a detailed description of the study and understanding of SAR signals helpful.)

Matlab/Simulink仿真课程设计（论文）任务书,电压型逆变器 SPWM 调制技术的仿真.单相单极性SPWM调制,单相双极性SPWM调制,三相双极性SPWM调制(Matlab/Simulink simulation curriculum design (thesis) paper SPWM voltage source inverter modulation simulation. Unipolar SPWM modulation single-phase, single-phase bipolar SPWM modulation, three-phase bipolar SPWM modulation)

说明：  产生一个4096点的正弦加白噪声序列，且产生该序列的幅度谱(Produce a 4096 point increase in white noise sinusoidal sequence, and generate the sequence of the amplitude spectrum)

Principal componenet analysis code written in matlab paltform in order to solve multivariate problems like discriminating bological disease states from healty ones.