fractal

最速下降法，是数值分析中很重要的一种，源码为其在matlab中的实现。(Steepest descent method, numerical analysis is a very important one in the matlab source code for its realization.)

直方图是用面积表示各组频数的多少，矩形的高度表示每一组的频数或频率，宽度则表示各组的组距，因此其高度与宽度均有意义。 程序提取了很多直方图所需要的参数特征，如均值、方差、偏度、峰度、能量和熵。 (Histogram is that each group size the number of frequency, the height of the rectangular frequency of each group said that the number or frequency, the width of that group from each group, so the significance of height and width of both. Extraction procedures need a lot of parameters histogram features, such as mean, variance, skewness, kurtosis, energy and entropy.)

 产生长度为1000的标准正太分布的随机信号，画出时域波形及频谱；  采用u=255的非均匀PCM编码，每符号为8bit，画输入-输出关系图；  计算信号量化噪声比（SQNR）；  信道误码率为10-3；  解码，并画出u律反变换后的信号时域波形及频谱。 扩展要求：  采用均匀PCM、量化级数可变、信道误码率可变。 ( have a standard length of 1000 is too random signal distribution, draw time-domain waveform and frequency spectrum  u = 255 using the non-uniform PCM encoding, each symbol for 8bit, drawing input- output relationship diagram  calculated quantization noise signal than (SQNR)  channel bit error rate of 10-3  decoder, and law to draw u the signal after the inverse transform time-domain waveform and frequency spectrum. Expansion of the requirements:  uniform PCM, quantization level variable, a variable channel bit error rate.)

matlab高编程书籍，实用性强，属于提高类书籍(High matlab programming books, practical)

matlab实现mel倒谱系数提取的子函数(matlab achieve mel cepstral coefficients extracted Functions)

this is thesis about digit recognition, it is very useful for one to understand how to write in matlab code

清华大学博士论文仿真程序代码（电网计算）(Tsinghua University doctoral thesis simulation code (grid computing))

利用层次分析法解决方案层对准则层和目标层的权重并相应的做出决策。(Using the analytic hierarchy process (ahp) solution on criterion layer and target layer and the corresponding weights of decision-making.)

利用小波阈值系数降噪的方法，对振动噪声信号进行降噪( 25/5000 Lìyòng xiǎobō yùzhí xìshù jiàng zào de fāngfǎ, duì zhèndòng zàoshēng xìnhào jìnxíng jiàng zào The method of wavelet threshold coefficient noise reduction is used to noise the noise signal)

本程序是对均值滤波方法和中值滤波方法的去噪效果对比的MATLAB程序(This procedure is a mean filter and median filter denoising methods MATLAB procedures contrast effect)