CC2500-SPI 驱动

本文提出了基于二维混沌映射的数字图像水印算法，混沌具有随机性、似噪声及对初始条件的极端敏感性等特点。将经过二维混沌映射置乱后的数字水印信号嵌入图像小波域的低频系数，实现了数字水印的隐蔽性、保密性和稳固性；利用二维混沌映射Arnold变换对水印信号进行置乱，不仅增强了水印信号保密性，同时有效提高了视觉上抵抗图像剪切攻击的能力。(In this paper, two-dimensional chaotic map based on digital image watermarking algorithm, Chaos with random noise and the likelihood of extreme sensitivity to initial conditions and so on. Two-dimensional chaotic map will be scrambling after the digital watermark embedded image signal of the low-frequency coefficients in wavelet domain, the realization of a digital watermark hidden, security and stability the use of two-dimensional chaotic map on Arnold transform scrambling watermark signal, not only enhances the confidentiality of the watermark signal at the same time improve the visual image shear resistance attacks.)

多线程爬虫 图片爬虫 ip变换爬虫等一些小的爬虫应用(muli-thread webcrawler，picture webcrawler，ip-change webcrawler)

可以架设自己的游戏，带安装架设教程。简单几步即可实现棋牌游戏

C51下IDT7005双口RAM控制程序和原理图(C51 under IDT7005 dual-port RAM control procedures and schematics)

说明：  无人机在巡检的过程发现缺陷会出现立刻巡检(UAV go traking the condication,it find the difference .)

用c#编的，批量修改文件的后缀名，挺有用的-Compiled with the c#, batch modify the suffix names

51控制的8x8x8光立方（512个LED的亮灭），变成实现不同的团变化，采用不同的延时时间是转换的速度不同。完整的源程序，电路图和PCB(51 controls the 8x8x8 cube of light (512 LED light off), to achieve different changes into groups with different delay times are different conversion speeds. Complete source code, schematics and PCB)

说明：  finite element theory

AT mega16 最小系统电路图 原理图(mega16 Schematic diagram)

winform 浮雕效果的图像 例子