用于时间序列的功率谱分析 power spectrum

将系数矩阵A转变成等价两个矩阵L和U的乘积 ，其中L和U分别是下三角和上三角矩阵。当A的所有顺序主子式都不为0时，矩阵A可以唯一的分解为A=LU。其中L是单位下三角矩阵，U是上三角矩阵。 (The coefficient matrix A into two matrices L and U is equivalent to the product, where L and U are lower triangular and upper triangular matrix. When A master style is not all the sequence is 0, the matrix A can only be decomposed into A = LU. Where L is unit lower triangular matrix, U is upper triangular matrix.)

以天线方向图函数为例，分析了对称阵子天线、阵列天线方向图函数F(0， )随各参量变化的规律以及二维图形的特点，并讨论了直线天线阵(单向端射阵)的最大辐射方向和主瓣宽度随各参量变化的二维、三维图形特点。借助MATLAB的绘图功能，对各种天线的方向图函数的二维、三维图形进行研究，可以观察到天线辐射场在不同方向的辐射能量分布。直观清楚地表现出辐射方向图的特点。(Antenna pattern functions as an example to analyze the symmetry time around antenna array antenna pattern function F (0,) with each variation of parameters and characteristics of two-dimensional graphics, and discussed the linear antenna array (one-way end-fire array) The maximum radiation direction and the width of the main lobe of each parameter change with 2D and 3D graphics features. With MATLAB graphics functions for 2D and 3D graphics in a variety of antenna pattern function were studied, the antenna radiation field can be observed in the distribution of radiation energy in different directions. Features an intuitive clear demonstration of the radiation pattern.)

伪近邻法确定相空间重构嵌入维数，内涵已生成的典型混沌信号，可以直接使用。(Pseudo-neighbor method to determine the embedding dimension of phase space reconstruction, connotation typical chaotic signal generated can be used directly.)

灰度图像灰度经过按位混沌加密后再对其混沌置乱变换，阀值判断其迭代次数，达到预期加密效果(After a bit gray gray chaotic encryption by scrambling after its chaotic transformation, determine the threshold number of iterations to achieve the desired effect of encryption)

数字移动:图中的九个点上,空出中间的点,其余的点上任意填入数字1到8.1的位置固定不动,然后移动其余的数字,使1到8顺时针从小到大排列.移动的规律是:只能将数字沿线移向空白的点. (Digital Mobile: Figure in the nine points, empty out the middle point, the rest of the points fill any position of the numbers 1 to 8.1 fixed and then move the rest of the figures, and make 1-8 clockwise from small to large array . The law of movement is: can only move along the number of blank spots.)

说明：  仿真滚降系数为0.22的平方根升余弦滤波器的MATLAB程序.(Simulation of roll-off factor of 0.22 square root raised cosine filter of the MATLAB program.)

prograns for Mimo systems

模糊聚类的减法聚类的原代码 一种模糊聚类的方法(Subtractive clustering fuzzy clustering of the original code)

Induction motor matlab simulation in simulink with and without core loss effetct are attached

说明：  用MATLAB仿真DVHOP定位算法代码(Location algorithm using MATLAB simulation code DVHOP)