split-step-Fourier

matlab中用C语言编写sfunction, 实现读取文件中的数据，应用库"stdio.h"(matlab using C language sfunction, realize the data read from the file, the application library stdio.h)

基于环形的领域最优粒子群优化算法，MATLAB源程序(Based on the best areas of the ring particle swarm optimization algorithm, MATLAB source code)

Input data is the MS Excel file, where the table of nodes, table of elements, nodal external loads vector and boundary conditions are stored. After running the mabs2d.m file on the Command Window, the program calculates the stiffness matrix in local coordinates kiL (element i). Once the transformation matrix associated to the element is obtained, the stiffness matrix in global coordinates kiG is also calculated. The table of connectivity is automatically generated for the assembly process and then computes the complete stiffness matrix of the structure.

Design of a 3 phase round rotor turbo-alternator to satisfy the following specs: 150MW(real power), Y connected, 12.6kV (terminal voltage), 60Hz, 4 pole 0.85 lagging, 250m/s peripheral speed for 20 over speed run, directly cooled stator(water) and rotor(hydrogen), Vfmax = 500V, 60 slots, 14/15 pitch, skew 1 slot, 12 parallel circuits and 25 degree C, working temperature.

读入指定的音频序列，并对其进行无损预测编码和DM调制编码(Read into the specified audio sequences, and its lossless predictive coding and modulation coding DM)

提出了一种可抗 几何攻击的二值文本图像水印算法. 该算法基于DCT,它将二值图像的DCT、图像的视觉特征向 量和加密技术有机结合起来,在提取水印时不需要原始图像,是一种实用的盲水印算法(We propose a geometric attacks against Binary Text Watermarking Algorithm. The algorithm is based on DCT, it binary image DCT, the image of the visual feature vector and encryption technology combine in the watermark without the original image is a practical blind watermarking algorithm)

输入训练样本集和测试样本集，通过提取HOG然后用SVM实现分类。(Input training samples and test samples, extract HOG and implement classification with SVM.)

非线性遗传算法代码，解决带约束条件的一般问题(Nonlinear genetic algorithm code, solve the general problem with constraints)

利用matlab进行五点三次法平滑处理(时域和频域)(Using matlab 5.3 times France smoothing process (time domain and frequency domain))

采用MATLAB语言，编程实现了数字图像的结构相似系数（SSIM）的计算，程序简单，易运行。(Using MATLAB language, programme the digital image structure similarity coefficient (SSIM). Andthe program is simple, easy to run.)