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Fresnel函数计算相对折射率所面临的问题是计算量较大，利用实测数据计算散射系数并作图显示结果(Fresnel function by calculating the relative refractive index is a calculation of the problems faced by large, using the measured scattering coefficient data and mapping the result will be displayed)

tilemaps for mappy on

this program implement barbershop in c++

EMD经典程序包，求瞬时频率和瞬时幅值，以及希尔伯特谱等。(Classic EMD program package, and instantaneous frequency and amplitude, as well as Hilbert spectrometer.)

若不希望用与估计输入信号矢量有关的相关矩阵来加快LMS算法的收敛速度，那么可用变步长方法来缩短其自适应收敛过程，其中一个主要的方法是归一化LMS算法（NLMS算法），变步长 的更新公式可写成 W（n+1）=w（n）+ e（n）x（n） =w（n）+ （3.1） 式中， = e（n）x（n）表示滤波权矢量迭代更新的调整量。为了达到快速收敛的目的，必须合适的选择变步长 的值，一个可能策略是尽可能多地减少瞬时平方误差，即用瞬时平方误差作为均方误差的MSE简单估计，这也是LMS算法的基本思想。 (Want to estimate if the input signal vector and the relevant matrix to speed up the convergence rate of LMS algorithm, then the variable step size method can be used to shorten its adaptive convergence process, one of the main method is normalized LMS algorithm (NLMS algorithm) , variable step-size update formula can be written W (n+ 1) = w (n)+ e (n) x (n) = w (n)+ (3.1) where, = e (n) x (n) the right to express filter update vector iterative adjust the volume. In order to achieve the purpose of fast convergence, we must choose the appropriate value of variable step size, a possible strategy is as much as possible to reduce the instantaneous squared error, which uses the instantaneous squared error as the mean square error MSE of the simple estimate, which is the basic LMS algorithm思想.)

FIR Low pass filter simulation using matlab

PID控制matlab仿真，在输入分别为阶跃和正弦函数下的响应曲线，绘制输入与实际对比图(PID control matlab simulation, in the input of the step and sine function under the response curve, drawing the input and the actual comparison map.)

说明：  matlab 模型保护程序对模型进行保护，编译成obj文件(matlab model protection ,we complier the sfunction .c file to mexw file and .obj file)

基于电流滞环的FOC PMSM 仿真模型。测试通过(Hysteresis based on the FOC PMSM current simulation model. Test)

说明：  MATLAB实用程序百例,三角函数曲线/三维曲线图等，包括了MATLAB数据分析作图的主要内容(100 cases of MATLAB utility, trigonometric curves/three-dimensional curves, including a MATLAB data analysis mapping the main content)