aobenhaimu

数字水印(digitalwatermarking)是一种信息隐藏技术，它的基本思想是在数字图像、音频或视频等数字媒体作品中嵌入秘密信息，以便保护数字作品的版权、证明作品的真实可靠性、跟踪盗版行为或提供作品的附加信息。(Digital Watermarking (digitalwatermarking) is a kind of information hiding technology, its basic idea is in the digital image, audio or video digital media works, such as embedded secret information in order to protect the copyright of digital works to prove that the true reliability of the work, tracking piracy works or provide additional information.)

This function takes the n time domain samples (real or complex) and finds the psd by taking (fft/n)^2. The two sided spectrum is produced by shifting the psd The array freq provides the appropriate frequency values for plotting purposes. By taking 10*log10(psd/max(psd)) the psd is normalized values beow 60db are set equal to -60db

this code is useful for line of sight of two point that are vehicle(aircraft) with fast dynaimc

Buck-Boost电路仿真，用simulink仿真的。针对初学者大家相互学习。(Buck-Boost circuit simulation with simulink simulation. For beginners learn each other.)

Compression and decompression using huffman code

source codes for clustering algorithm

matlab codes for Implements 1D-3D NUFFTs via Fast Gaussian Gridding

各种滤波器大全，FIR，自适应，IIR等。(Daquan various filters, FIR, adaptive, IIR and so on.)

说明：  用谢菲尔德遗传算法工具箱调试 DeJong 函数的说明(with Sheffield GA Toolbox debugging function DeJong Note)

MATLAB及其在理工课程中的应用-课程讲义第一章和第二章，包含主要函数与命令文档，方便编程时学习和查找(MATLAB and Its Application in Engineering Course- Course Training Manual Chapters I and II, contains the main function with command documentation to facilitate programming to learn and find)