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短时傅里叶变化的程序， 可以2d显示，也可以3d显示，短时傅里叶变化的结果。(Short-time Fourier transform of the process, can be 2d show can also be 3d shows the result of short-time Fourier transform.)

Software-defined radios (SDRs) have been around for more than a decade. The first complete Global Positioning System (GPS) implementation was described by Dennis Akos in 1997. Since then several research groups have presented their contributions.We therefore find it timely to publish an up-to-date text on the subject and at the same time include Galileo, the forthcoming European satellitebased navigation system. Both GPS and Galileo belong to the category of Global Navigation Satellite Systems (GNSS).

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matlab高阶谱工具箱 有维格纳2阶，3阶切片(Wigner order spectrum matlab toolbox has two bands, three bands sliced)

针对实际工业生产中常见的多输入多输出时滞过程, 构造多变量Smith预估控制结构, 提出基于对象模 型伴随矩阵的解耦器设计方法. 通过对解耦后对象的幅频和相频特性分析, 获得对象的简化一阶数学模型. 根 据Smith预估控制结构闭环特征方程的特点, 利用Butterworth滤波器极点配置的原理, 对解耦后的多变量时滞过程 设计PI控制器. 结合实际过程中常见的不确定性, 分析了控制系统保证鲁棒稳定性的充要条件. 最后以实例验证了 本文所提方法的优越性.(The decoupling Smith control method is presented for multi-input-multi-output system with time-delays which are often encountered in practical engineering. A new method for designing the decoupler based on the adjoint matrix of the multivariable system model with time-delays is proposed. By analyzing the amplitude-frequency and phasefrequency characteristics of the decoupled model, the decoupled model is reduced to a first-order model with time-delay. According to the closed-loop characteristic equation of Smith predictor structure, a PI controller is developed by using the principle of pole assignment for Butterworth filter. Sufficient and necessary conditions for robust stability are derived for adaptive and multiplicative uncertainties commonly occurred in practice. Simulation results show the superiority of the proposed method.)

MLSRS generates the maximal length shift register

Matlab image stitching algorithm

本matlab程序用DFP法求解多元模型的最小值（给出初始点和精度要求条件）。(The matlab program using DFP method for solving the minimum multivariate model (given initial point and precision conditions).)

使用matlab合成音乐，用傅里叶级数或傅里叶变换的方法来做，最后用分析得到的吉他的特性来演奏东方红(Matlab music synthesis, using Fourier series or Fourier transform method .And finally use the guitar features formerly analysised to play with DFH)

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