xiandai

此为基于二代提升小波的阈值压缩算法源码，其中可以设置小波变换的分解层数，使用的小波名称，及各层阈值设置计算公式中的参数。并将低频系数转化为十六进制，方便在其上进一步压缩，如采用Huffman压缩等，程序思路清楚，附有完整的注释，可以使用多种小波，并且很好得体现了二代小波的思想，对于初学小波者帮助很大。(based on the second generation of this upgrade wavelet compression algorithm threshold source, which can set wavelet transform decomposition level, the use of wavelet name, threshold levels and set the formula for calculating the parameters. And low-frequency coefficients into hexadecimal facilitate its further compression, such as the Huffman compression. procedures ideas clearly, with the integrity of the Notes, you can use a variety of wavelet, and reflected very well in the second generation wavelet thinking, For beginners who wavelet of great help.)

内含巴特沃思滤波器（Butterworth）MATLAB代码，分高通与低通两种情况，并用mesh显示滤波器的三维图(Containing Butterworth filter (Butterworth) MATLAB code, sub-high-pass and low pass both cases, with mesh filter of three-dimensional map display)

说明：  一个双隐层拟合非线性模型的例子，用matlab编写(A two hidden layer nonlinear model fitting example of the preparation with matlab)

搭建最小二乘法的三阶模型，采用该模型的输入输出数据进行参数辨识(The third-order model to build the least squares method, input and output data of the model parameter identification)

anfis subclustering with matlab

基于S函数BP神经网络的PID控制器的研究与学习，方便简单，实用性特别强。(S function based on BP neural network PID controller research and study, convenient and simple, practical particularly strong.)

数值微分精度及步长的关系，截断误差和舍入误差，体会误差对结果的影响，用算法1 和算法2 分别得到的结果进行比较，由Taylor公式可得到两种算法的截断误差(Accuracy of numerical differentiation and the relationship between step length, truncation error and rounding error, the error on the results of experience with algorithm 1 and algorithm 2 respectively, to compare the results obtained by the Taylor formula for the truncation error of two algorithms available)

PPT，关于matlab实现著名的希尔伯特黄变换算法，介绍了HHT算法的基础知识(HHT basic information in matlab)

基于m序列的DS-CDMA通信系统仿真的调制解调模型(M-sequence-based DS-CDMA communication system simulation model of modulation and demodulation)

三次样条差值的matlab源代码，包含图像，龙格现象的分析(Cubic spline difference matlab source code, including images, analysis of Runge phenomenon)