fuzzy-book

子波分析是一种日益获得广泛应用的信号处理新技 术, 具有良好的时-频局部化特性, 尤其适用于时变及非平 稳信号。本文简述了子波函数与子波展开的基本概念, 利用 展缩子波和调和子波将信号及信号均方值进行时-频两维 分布。最后采用了三种子波分析方法对轴承故障进行诊断, 即使对现有各种方法尚难以诊断的滚动体故障, 也能获得 满意的结果, 说明子波分析的确为机械故障诊断提供了强 有力的分析手段。(Wavelet a nalysis, as a new technique of signal processing , possesses ex cellent characteristic of time-frequency localization and is suitable for analyzing the time-var ying or transient signals. In this paper , the basic concepts of wavelet function and wavelet expansion are briefly introduced. The time frequency distribution of signal and its energy are obtained by decomposition via dilating wavelet and harmanic wavelet. )

Script for computing the per symbol peak to average PAPR for an OFDM transmit waveform (loosely based on IEEE 802.11A specifications) Further, Cumulative Distribution Function (CDF) plots of the PAPR is captured

改进的维纳滤波在地震资料处理中的应用（地震勘探、信噪比、维纳滤波）(At the Wiener filter to improve seismic data processing application (seismic exploration, signal to noise ratio, Wiener filtering))

MATLAB实现循环码的编译码，信源为随机产生数，并且计算码间的汉明距离(MATLAB recycling code encryption, the source randomly generated number, and calculates the Hamming distance between the code)

数字水印提取算法，利用空域变换的（lsb）算法(Digital watermark extraction algorithm, the use of airspace transform (lsb) algorithm)

说明：  用Matlab实现相关分析,并建立其系统界面；对给定的试验数据进行相关分析(Correlation analysis using Matlab implementation and the establishment of the system interface on a given test data correlation)

finds potentials and currents in electrical networks

差分方程的蛛网模型，matlab的小例题，方便易懂，解释合理。(Cobweb model of the differential equation matlab example, convenient and easy to understand, explain and reasonable.)

Spectrum Analysis using FFT

改程序勇于特征降维。使用PCA的方法降低特征维度(Courage to change the feature dimension reduction program. Use PCA method to reduce the dimension feature)