exam4_1

给出了简单的点到点CDMA系统的物理层和链路层联合仿真的Matlab程序。程序不长，但麻雀虽小，五脏据全。有详细的中文注释，相信一看就懂。(is a simple point-to-point system CDMA physical layer and link layer joint Matlab simulation procedures. Procedures are not long, but Sparrow Although small, but it was full. A detailed notes in Chinese, I believe one can understand it.)

利用svd的一种水印方法。SVD即奇异值分解(Singular Value Decomposition)算法。 (A watermarking method using svd. Singular value decomposition SVD that (Singular Value Decomposition) algorithm.)

流形学习是近年来机器学习及模式识别等领域的一个研究热点，其主要目标是去发现高维观察数据空间的低维光滑流形。自从2000年Roweis和Saul提出LLE算法、Tenenbaum等人提出Isomap算法，特别是Donoho等人发现Isomap算法能够准确发现人脸图像流形潜在的参数空间、张长水等人将LLE算法用于人脸识别并取得了较好的识别效果之后，基于流形学习的人脸识别研究引起了人们的广泛关注。(Manifold learning in recent years the field of machine learning and pattern recognition as a research focus, its main goal is to find high-dimensional data space observation of low-dimensional smooth manifold. Since 2000 LLE algorithm proposed by Roweis and Saul, Tenenbaum and others proposed Isomap algorithm, especially Donoho, who found that Isomap algorithm can find the potential face images of the parameter space manifold, and Chang-water will LLE algorithm for face recognition and to obtain a good recognition results, the manifold learning-based face recognition research has aroused extensive attention.)

伽玛变化方面的程序，我找了很久迎合了影像处理理论与实际这本书中的实例希望对大家有所帮助。(Gamma-change procedure, I find for a long time to meet the image processing theory and practical examples of this book to all of us want to be helpful.)

4QAM调制的OFDM多径传输，对不同的信道估计算法的误码性能进行比较(OFDM modulation 4QAM multi-path transmission, for different channel estimation algorithm to compare the BER performance)

matlab解线性方程组的直接法程序，里面包括了常用的matlab解线性方程组的直接法程序，包括手写的和matlab自还的函数。(matlab solving linear equations of the direct method procedures, which includes the commonly used matlab solving linear equations of the direct method procedures, including hand-written and self is also a function of matlab.)

说明：  二维梁单元有限元分析，包中有详细的WORD文档说明(Two-dimensional finite element analysis of beam elements, including the documentation detailed WORD)

Radon transform and inverse radon , and their histogram step by step. can be use for edge detection and finding the number of object in image

说明：  matlab从入门到精通，该本书由简到难，适合新手学习收藏！(Matlab from introduction to mastery, this book from simple to difficult, suitable for novice learning collection!)

matlab使用文本文件进行数据存取详细过程说明(matlab using a text file for data access detailed process description)