chengxu4

说明：  计算球形壳层纳米颗粒的散射问题，包括散射系数矩阵，消光系数，吸收系数等。源程序用Matlab编写，方便学习调试(Calculate the scattering of spherical shell nanoparticles, including the scattering coefficient matrix, extinction coefficient, absorption coefficient. Source code written using Matlab to facilitate learning debugging)

说明：  通过BP神经网络学习一个3维的函数的源代码，为加快速度，程序初始化的为已经经过学习的得到结点权值，如果预设为随机值，将重新学习。(BP neural network through a three-dimensional study of the function of the source code to speed up, the initialization procedure for the study has already been node weights, if limited to random value, re-learn.)

说明：  这是一个高速公路仿真模型。该仿真模型可以在matlab中以命令行形式或者图形界面形式进行。(CTMSIM is an interactive freeway traffic macrosimulator for MATLAB. It is based on the Asymmetric Cell Transmission Model (ACTM) and allows user-pluggable ramp flow and ramp queue controllers. Its output can be directly compared with PeMS data .CTMSIM operates both in graphical (interactive) mode and command line (batch) mode.)

经典的knn最近邻算法 利用matlab的内部JIT加速算法，简单好用，高速时效。(Classic knn nearest neighbor algorithm using matlab internal JIT accelerated algorithm, easy to use, high-speed aging.)

小波域内选择能量较大的系数嵌入数字水印的程序(Digital watermarking based on block energy selection)

使用k均值算法对多个数据集进行分类，已测试通过，简单易懂(classification to many datasets using k-means algorithm ,simple and easy-understanding.)

Matlab 图片拼接 包内是.m文件，注意图片命名，需要手动配置修改(Matlab image stitching package is.M files, note that the picture naming, the need for manual configuration changes)

本例演示：1、画两个同心圆，其中一个半径由独立输入宗量定义，另一个由变长度输入宗量的第一个元素定义，可以用任何指定的色彩线形绘制；2、变长度输入输出宗量在程序中的构成和使用；3、变长度输入输出宗量的对外使用表现(the cases demonstrated : a painting of two concentric circles, with a radius of independent input variables defined Another variable length from the importation of the first cases of an element of the definition, can be used in any linear color rendering; 2. Variable length input and output variables in the process of composition and use; 3, variable length input and output variables in the external use of performance)

图像空域锐化增强，用matlab分别实现Roberts、Sobel、Priwitt算子的锐化处理，以及实现拉普拉斯图像和原始图像叠加的增强处理(Image airspace sharpening, respectively, to achieve with matlab Roberts, Sobel, Priwitt operator sharpening, and achieve enhancement Laplace image and the original image overlay)

数字信号处理应用仿真程序，感谢北航自动化学院王秋生老师(Digital signal processing applications simulation program, thanks to Northern College of Automation, WANG Qiu-sheng teacher)