filter

comparison of classification of three methods analytical,wavelet,SVMs

近似熵是一种衡量衡量非线性时间序列复杂性的非线性动力学分析方法，其物理意义 为熵值越大，时间序列的自我相似性越低，序 列越复杂，反之序列自我相似性越高；并且样 本熵对于序列长度依赖弱，仅需较短的数据就 能够得到稳健的熵值，同时其计算不需对数据 粗粒化，具有较好的抗干扰能力 (Approximate entropy is a measure to measure the complex nonlinear dynamics of nonlinear time series analysis method, the physical meaning of entropy value is larger, the lower the self-similarity of the time series, the more complex the sequence, whereas sequence of self-similarity the higher and the sample entropy weak dependence for the length of the sequence, only shorter data can be healthy entropy value, calculated without data coarse-grained, with good anti-jamming capability)

802.11 a/g/n/ac 发射机matlab代码，包含详细说明文档(802.11 a/g/n/ac transmitter code，including the ref document)

openExcel :用Matlab打开启动Excel服务器，并返回Excel活动页的句柄H jitt : 利用传入的周期向量，计算频率抖动 norma : 把计算得到的向量平均采样为30个点 interest ： 复利计算方法 myvad : 通常vad算法只能得到汉语普通话一声、二声和四声的语音，对于三声，中间因为有嘎裂，就是突然基频变得很低并且不规则，vad算法把一个音节往往切分为两个音节，myvad解决普通话三声的问题 (Open Excel sever by Matlab, and returen a handle of Excel active sheet)

用matlab对图像的7个不变矩特征进行提取，并进行归一化。亲测可用，适合初学者。(Matlab for image seven moment invariant features were extracted and normalized. Pro-test is available for beginners.)

说明：  序列x(n)的Bartlett法功率谱估计 用matlab实现(sequence x (n) Bartlett power spectrum estimation method used to achieve Matlab)

这是我多年MATLAB编程的技巧汇总，希望对大家有用。里面包含命名规则，怎样优化程序等等。(This is my years of MATLAB programming skills summary, I hope useful for everyone. Which contains the naming rules, how to optimize procedures.)

In statistics, Isomap is one of several widely used low-dimensional embedding methods, where geodesic distances on a weighted graph are incorporated with the classical scaling (metric multidimensional scaling). Isomap is used for computing a quasi-isometric, low-dimensional embedding of a set of high-dimensional data points. The algorithm provides a simple method for estimating the intrinsic geometry of a data manifold based on a rough estimate of each data point’s neighbors on the manifold. Isomap is highly efficient and generally applicable to a broad range of data sources and dimensionalities.

使用MATLAB创建GUI界面，对图像进行相关处理，例如：几何变换、滤波、加燥等。(Use MATLAB to create a GUI interface for image-related processing, such as: geometric transformations, filtering, plus dry and so on.)

一个基于matlab的fsk仿真，加入了高斯白噪声(Fsk the matlab-based simulation, by adding a Gaussian white noise)