matlab-chengxu

FFT变换以及IFFT变换 基于matlab编程 (Based on the FFT and IFFT transform matlab programming)

使用与matlab中的小波熵程序，易于实现，注释清晰容易理解(With the the wavelet entropy program in matlab, easy to implement easy to understand, clear notes)

可利用feko得到回波或根据公式构造回波，基于字典缩放的属性散射中心的参数提取，并重构回波(The echo can be obtained by using FEKO, or the echo can be constructed according to the formula. The parameters of the scattering center of the dictionary are extracted based on the dictionary scaling and the echo is reconstructed.)

频率采样法设计fir滤波器，大家可以看看。 挺不错的。(frequency sampling filter design fir, we can look at. Sounds very good.)

SMPP Protocol version 3.4

介绍了一种特定频率响应滤波器的设计方法，具有很强的实际应用价值(Introduces the design method of a specific frequency response filter, which is of great practical application value)

说明：  calculating using jacobi on matlab numeric

svm已经广泛用于解决分类和回归问题。 此工具箱是由South ampton大学的S. R. Gunn编写的Matlab SVM Toolbox。该工具箱运行在MATLAB环境下,由许多用m语言编写的脚本文件和函数组成,为SVM 技术的工程化、实用化提供了一个良好的平台。(South ampton university svm toolbox)

说明：  EKF仅仅利用了非线性函数Taylor展开式的一阶偏导部分（忽略高阶项），常常导致在状态的后验分布的估计上产生较大的误差，影响滤波算法的性能，从而影响整个跟踪系统的性能。最近，在自适应滤波领域又出现了新的算法——无味变换Kalman滤波器（Unscented Kalman Filter-UKF）。UKF的思想不同于EKF滤波，它通过设计少量的σ点，由σ点经由非线性函数的传播，计算出随机向量一、二阶统计特性的传播。因此它比EKF滤波能更好地迫近状态方程的非线性特性，从而比EKF滤波具有更高的估计精度。 (EKF only uses non-linear function of the first-order Taylor expansion of some partial derivatives (ignoring higher order terms), often leading to the posterior distribution of the state estimates to generate large errors affect the performance of filtering algorithms, which affect the whole tracking system performance. Recently, the field of adaptive filtering algorithms and the emergence of new- and tasteless transform Kalman filter (Unscented Kalman Filter-UKF). EKF UKF filter is different from the idea that it points through the design of a small amount of σ by σ point spread through the nonlinear function to calculate the random vector first and second order statistical properties of the transmission. Therefore it is better than the EKF filter nonlinear characteristics equation of state approach, which is more than the EKF filter estimation accuracy.)

说明：  EEG近似熵计算程序，便于计算脑电信号 一种简单有效的测度熵替代方法——近似熵(approximate entropy)方法(EEG approximate entropy calculation program, facilitate the calculation of EEG)