PMSG

(有源代码)数值分析作业,本文主要包括两个部分,第一部分是常微分方程(ODE)的三个实验题,第二部分是有关的拓展讨论,包括高阶常微分的求解和边值问题的求解(BVP).文中的算法和算例都是基于Matlab计算的.ODE问题从刚性(STIFFNESS)来看分为非刚性的问题和刚性的问题,刚性问题(如大系数的VDP方程)用通常的方法如ODE45来求解,效率会很低,用ODE15S等,则效率会高多了.而通常的非刚性问题,用ODE45来求解会有很好的效果.从阶次来看可以分为高阶微分方程和一阶常微分方程,高阶的微分方程一般可以化为状态空间(STATE SPACE)的低阶微分方程来求解.从微分方程的性态看来,主要是微分方程式一阶导系数大的时候,步长应该选得响应的小些.或者如果问题的性态不是太好估计的话,用较小的步长是比较好的,此外的话Adams多步法在小步长的时候效率比R-K(RUNGE-KUTTA)方法要好些,而精度也高些,但是稳定区间要小些.从初值和边值来看,也是显著的不同的.此外对于非线性常微分方程还有打靶法,胞映射方法等.而对于微分方程稳定性的研究,则诸如相平面图等也是不可缺少的工具.值得提出的是,除了用ode系类函数外,用simulink等等模块图来求解微分方程也是一种非常不错的方法,甚至是更有优势的方法(在应用的角度来说).((Source code) numerical analysis homework, this docment includes two parts, the first is ordinary differential equations (ODE) of the three examples, the second part is about the expansion of the discussion, including the higher-order ordinary differential & boundary value solution Problems (BVP). the text of the algorithm and numerical examples are based on the Matlab. ODE from the rigid (STIFFNESS) look into the issue of non-rigid and rigid problem, rigid problems (such as large coefficient VDP equation) such as using the always method ODE45 used to solve the problems , efficiency will be low, with ODE15S the other hand, many of the high efficiency. and the usual problem of non-rigid, there will be used to solve ODE45 very good results. Judging from the order can be for high-order differential equations and first-order ordinary differential equations, higher-order differential equations can be transformed into a general state space (STATE SPACE) used to solve the low-order different)

《MATLAB 7[1].0编程基础基础》一书中的所有源程序。(" MATLAB 7 [1] .0 programming based on the basis of" one book, all the source code.)

Sliding mode control

这个程序是单纯行法寻优子程序（多变量寻优），是我的一个作业，希望对大家有用。(This procedure is a simple line method optimization subroutine (multi-variable optimization), is one of my operation, I hope useful for all of us.)

Modeling of MCFC process

谱估计的welch算法的matlab仿真(Spectrum estimation welch algorithm matlab simulation)

杨氏young s双缝干涉matlab代码（含动画示意）(Young' s Young' s double-slit interference matlab code (including animation schematic))

判断半正定矩阵与正定矩阵间的一种新的准则，gky方法是判定系统是否稳定的一种很有效的方法，里面有源代码和相应文档(Judge half positive definite matrix and the positive definite matrix, a new criterion between gky method is to determine whether the system stability of a kind of very effective method, there are source code and documentation accordingly)

包括最小二乘法、SVM、神经网络、1_k近邻法,用于信号特征提取、信号消噪，真的是一个好程序，采用热核构造权重，在matlab环境中自动识别连通区域的大小,GPS和INS组合导航程序，单径或多径瑞利衰落信道仿真，通过反复训练模板能有较高的识别率。( Including the least squares method, the SVM, neural networks, 1 _k neighbor method, For feature extraction, signal de-noising, Really is a good program, Thermonuclear using weighting factors Automatic identification in the matlab environment the size of the connected area, GPS and INS navigation program, Single path or multipath Rayleigh fading channel simulation, Through repeated training FssQvKhlate have higher recognition rate.)

说明：  使用3种方法（卡尔曼，巴特沃斯，小波）处理肌电信号，得出了关于那一种动作的各快肌肉参与情况。(The three methods (Kalman, Butterworth, Wavelet) were used to process the EMG signal, and the fast muscle involvement of that type of action was obtained.)