rungekutta

主要解决matlab的数值积分问题，包括了复合梯形公式和复合辛普森公式(matlab)

tutorial to make functions and other utilities in Matlab

this pgm read text from file and encrypt using rail fence technique.Encrypted text written to file which is read and decrypted using railfence

关于天线理论的一本书，对散射的研究很深刻，适合作为隐身设计的参考资料(A book about the antenna theory, the research on scattering is very deep, suitable as a stealth design reference)

使用Matlab对图片进行操作时，大量的单张图片不利于操作，此时需要将图片转化为.mat格式，.mat方便我们对数据的处理，使我们更加高效的利用数据。文章中的代码是以PIE数据集作为转换的原始数据，每张图片的名称是连续的数字，相同类别的图片张数相等且名称连续。(When using MATLAB to operate pictures, a large number of single pictures are not conducive to operation. At this time, we need to convert pictures into. mat format. mat is convenient for us to process data, so that we can use data more efficiently. The code in this article is PIE data set as the original data for conversion. The name of each picture is a continuous number. The number of pictures of the same category is equal and the name is continuous.)

说明：  三相三线并联型有源电力滤波器模型，可完美运行仿真结果。(Three-phase three-wire shunt active power filter model can run the simulation results perfectly.)

基于二阶导数的图像边缘检测方法，包括marr算法和laplacian算法(Second derivative-based edge detection methods, including marr algorithms and laplacian algorithm )

Traditional single particle reconstruction methods use either the Fourier or the delta function basis to represent the particle density map. We propose a more flexible algorithm that adaptively chooses the basis based on the data. Because the basis adapts to the data, the reconstruction resolution and signal-to-noise ratio (SNR) is improved compared to a reconstruction with a fixed basis. Moreover, the algorithm automatically masks the particle, thereby separating it from the background. This eliminates the need for ad-hoc filtering or masking in the refinement loop. The algorithm is formulated in a Bayesian maximum-a-posteriori framework and uses an efficient optimization algorithm for the maximization. Evaluations using simulated and actual cryogenic electron microscopy data show resolution and SNR improvements as well as the effective masking of particle from background

说明：  duffing方程的仿真及计算程序，可用于信号的处理机仿真运算，也可进行其它的数学运算。(duffing equation simulation and calculation procedures can be used to signal processor simulation computing, but also for other mathematical operations.)

说明：  《matlab小波分析》的第二章源代码，与书是配套的，挺好的(&quot Matlab wavelet analysis,&quot the source code of the second chapter, with the book are complementary, and quite good)