GA_BP

能够利用偏最小二乘回归模型分析电力系统谐波发射水平，MATLAB编制(Able to take advantage of partial least-squares regression model launch level of power system harmonics, MATLAB preparation)

sig is a parameter scaling the innovation to the exogenous variables

用于处理简单实验数据的曲线预测，可通过修改函数完成相关的插值或拟合工作(For curve prediction process simple experimental data, to be completed by the relevant interpolation or fitting work by modifying the function)

用matlab实现图像的灰度线性变换，图像二值化，负象变换，灰度非线性变换等。(Grayscale image using matlab linear transformation, binary image, negative image transformation, gray non-linear transformation.)

耳蜗实质上相当于一个滤波器组，耳蜗的滤波作用是在对数频率尺度上进行的，在1000HZ下，人耳的感知能力与频率成线性关系；而在1000HZ以上，人耳的感知能力与频率不构成线性关系，而更偏向于对数关系，这就使得人耳对低频信号比高频信号更敏感。Mel频率的提出是为了方便人耳对不同频率语音的感知特性的研究。频率与Mel频率的转换公式为(Cochlear substantially equivalent to a filter set, cochlear filter is used on logarithm frequency scale, under the 1000 hz, the perception of the human ear and a linear relationship with frequency In more than 1000 hz, the perception of the human ear does not constitute a linear relationship with frequency, and prefer to logarithmic relationship, which makes the human ear is sensitive to low frequency signal is better than high frequency signal. Mel frequency is put forward in order to facilitate the ear of the study of speech perception characteristics of different frequency. For frequency and Mel frequency conversion formula )

最优分割的基本思路是给定一个数据序列和分层数，通过搜索所有可能的划分方案，找到段内离差平方和的总和最小的一种方案作为最终划分方案。这里给出最优分割法的Matlab源程序(The basic idea is optimal partition for a given data sequence and hierarchical number divided by searching all possible solutions to find the segment and the sum of the squared deviations smallest division of a scheme as a final solution. This gives the optimal segmentation Matlab source)

利用K-L变换进行特征提取 通过类平均向量来实现类别投影 (By K-L transform feature extraction Through the kind of average vector to achieve category projection )

主要讲了一些matlab的一些实用方法和技巧，方便对matlab的入门学习及掌握(Mainly about some matlab some practical methods and techniques to facilitate the entry of matlab learn and master)

说明：  该程序用于在实验中所测量的振动、噪声、水声以及数值模拟监测所得到的信号，实现信号的频谱分析。(The program is used to measure the vibration, noise, underwater sound and the signal obtained by numerical simulation monitoring in the experiment to realize the spectrum analysis of the signal.)

说明：  求x的算术平方根，保留N位有效数字，并返回算术平方根的平方(solving the square root of x with N digits Significant figures, and saving the Square root of the square)