math4

Analysis Skin Color by PCA and Relations in YCbCr Color Space

关于MATLAB 的学习资料 该资料通俗易懂 对初学者很有参考的价值(MATLAB-learning materials on the information easy to understand the value of a good reference for beginners)

加速度感应器的实现，重力加速度感应，感应器的DEmo(Implementation of the acceleration sensor, gravity sensor, the sensor DEmo)

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(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 )

选定海域包括渤海和黄海北部（117.50°—126.67°E，34.00—41.00°N），空间分辨率是10′×10′，通过二维潮波控制方程，用fortran编程计算该海域的水位，并进行调和分析，利用matlab画出该海域的同潮时线和等振幅线图，并用T/P卫星高度计数据进行检验。(Bohai Sea and the Yellow Sea waters include selected northern (117.50 °-126.67 ° E, 34.00-41.00 ° N), the spatial resolution is 10 × 10 , controlled by the two-dimensional tidal wave equation to calculate the water level of the sea with fortran programming and harmonic analysis, using matlab draw lines with the tide when the waters, such as amplitude and line graphs, and tested using the T/P satellite altimeter data.)

多元线性回归及显著性检验Matlab程序（完美版）(Multiple linear regression and significance tests Matlab program (perfect version))

该程序包包含五个代码，均用matlab编写，内容分别是混沌动力系统中，logistics函数随参数a变化周期收敛图像；以及seidel，jacobi两种迭代法求解线性方程组；以及常微分方程求解乒乓球运动轨迹；以及用newton向后插值法估计lnx函数值的源文件。 (This package contains five codes are written in matlab, the contents are chaotic dynamical systems, logistics function with parameters a change cycle convergence image and seidel, jacobi two iterative method for solving linear equations and ordinary differential equations Pong ball trajectory and an interpolation method to estimate with newton backward lnx function value source files. )

matlab辅助神经网络设计指南,对于MATLAB的运用有很大的参考价值(matlab neural network-assisted design guidelines for the use of MATLAB have great reference value)

这是一个关于盲源分离独立成分分析方法（ICA）的软件包,可用图形界面操作(Here is a blind source separation independent component analysis (ICA) of the package, there are graphic interface operation)

向matlab中读入s2p文件的数据。读入的数据格式为freqx[S11 S21 S12 S22](The program read .s2p file into matlab. The data matrix will have a dimension of freqx4. the four columns are [s11 s21 s12 s22].)