4.1

its says about finger print technology

MAC层CSMACA算法。基于matlab平台，是学习MAC层接入过程的好材料。(MAC layer CSMACA of algorithms. Based on the Matlab platform, is a good material to learn the MAC layer access process.)

matlab code for digital communication

利用matlab编写的扩频通信中涉及到的kasami小集序列，并验证其性质(Spread Spectrum Communication kasami sequence)

说明：  图象压缩方面的论文pdf格式 可用于毕业设计方面的工作(Image compression pdf format papers for school design work)

运用打靶法求解二阶边值问题。BVP2: [x1,x2]’ = f(t,x1,x2) with x1(t0) = x0, x1(tf) = xf(solve BVP2 by the shooting method)

说明：  采用matlab画螺旋线运动轨迹，速度曲线(Matlab Draw spiral motion track, speed curve)

在过程控制中，按偏差的比例（P）、积分（I）和微分（D）进行控制的PID控制器（亦称PID调节器）是应用最为广泛的一种自动控制器。(In process control, according to the percentage of deviation (P), Integral (I) and differential (D) control of PID controller (also known as PID regulators) is the most widely used of an automatic controller.)

实现数字图像水印的嵌入与提取，文件分为两个，一个为嵌入，一个为提取(digital image watermarking)

Converts a frequency domain signal to time domain