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[matlab] Numerik1prog DL : 0: 作业题就是说matlab中的常微分方程问题，是有ode45-operations that Matlab is the ordinary differential equations, have ode45
Date : 2025-12-22 Size : 2kb User : 张乐
[matlab] numerical_analysis_homework DL : 0: (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
Date : 2025-12-22 Size : 343kb User : wjl
[matlab] myeuler_vs_ode45 DL : 0: 比较欧拉公式与matlab的ode方法解微分方程的不同-Comparison of the Euler formula for the ode with matlab different method to solve differential equations
Date : 2025-12-22 Size : 2kb User : 侯硕本
[matlab] ODE45_lorenz DL : 0: Show work of ODE45 function. As the example use lorenz equation. Example show ensemble Puankare and phase picture
Date : 2025-12-22 Size : 1kb User : Alexandr
[matlab] lotkademo DL : 0: MATLAB Example Code : For MATLAB developers, this example code will explain the usage of Ordinary Differential Equations ODE23 and ODE45 in the Matlab environment-MATLAB Example Code : For MATLAB developers, this example code will explain the usage of Ordinary Differential Equations ODE23 and ODE45 in the Matlab environment
Date : 2025-12-22 Size : 1kb User : mansoor
[matlab] guides DL : 0: Guide to use and solve Ordinary Differential equations using ode45 in MATLAB
Date : 2025-12-22 Size : 95kb User : touchworks
[matlab] ode45 DL : 0: 解常微分方程的Matlab程序字符串ypfun是用以表示f(t, y)的M文件名, tspan=[t0, tfinal]表示自变量初值t0和终值tf y0表示初值向量y0，可选参数options为用odeset设置精度等参数。输出列向量tout表示节点，输出矩阵yout 表示数值解，每一列对应y的一个分量。若无输出参数，则作出图形。-Solution of ordinary differential equations of the Matlab program is used to indicate ypfun string f (t, y) M-file name, tspan = [t0, tfinal] said that since the variable t0 initial and final values of tf y0, said initial vector y0 , optional parameters to set options for the use of odeset accuracy and other parameters. The output column vector tout that node, the output matrix yout that of numerical analysis, each column corresponds to y of a component. If there are no output parameters, then make a graph.
Date : 2025-12-22 Size : 6kb User : jiajt
[matlab] ode45 DL : 0: ode45 function- the matlab code of ode function
Date : 2025-12-22 Size : 7kb User : parsa
[matlab] ODE45 DL : 0: matlab仿真模拟中的ode45的使用例程，文件代码是一个很好的ode45实验模板-ode45 matlab simulation in the use of routine, the file code is a good experimental template ode45
Date : 2025-12-22 Size : 6kb User : 刘子超
[matlab] ODEs-numerical-solutions-by-MATLAB DL : 0: 常微分方程的MATLAB解法教程详解，包含ODE45等经典函数的例子-Detailed tutorials in how to get Solution of Ordinary Differential Equations by MATLAB , includingclassic example of a function ODE45,ode23,etc
Date : 2025-12-22 Size : 2.09mb User : RobinZhang
[matlab] rossler DL : 0: 应用MATLAB软件模拟rossler模型，采用ode45解法-rossler model
Date : 2025-12-22 Size : 2kb User : zhao
[matlab] untitled DL : 0: 调用matlab中的ode45函数解微分方程，ode45解方程方法用的是四阶五级的龙哥库塔法-Call the matlab ode45 function solving differential equations, ode45 solve the equation method of fourth order with is the fifth longge coulthard method
Date : 2025-12-22 Size : 6kb User : zengxuefen
[matlab] How-Use-ODE45-to-solve-Boundary-Value-ODE DL : 0: In MATLAB, usually we use function bvp4c() to solve boundary value problem (BVP) of ODE. However, we also can use function ode45() to solve BVP of ODE too. However, ode45() needs all initial values at one point. Therefore we have to construct an auxiliary function, whose input argument is the missing initial value and the return output is the given boundary value, Then we can call function fsolve() to get the missing initial value. This method is particularly efficient it the ODE has one or more parameters. Also this method is essentilal for GNU Octave, because whose function bvp4c() is not programmed for parameter ODE yet.-In MATLAB, usually we use function bvp4c() to solve boundary value problem (BVP) of ODE. However, we also can use function ode45() to solve BVP of ODE too. However, ode45() needs all initial values at one point. Therefore we have to construct an auxiliary function, whose input argument is the missing initial value and the return output is the given boundary value, Then we can call function fsolve() to get the missing initial value. This method is particularly efficient it the ODE has one or more parameters. Also this method is essentilal for GNU Octave, because whose function bvp4c() is not programmed for parameter ODE yet.
Date : 2025-12-22 Size : 81kb User : delin
[matlab] matlab DL : 0: 运用ode45求解微分方程，并用matlab做出其图形-Use ode45 to solve differential equations, and make its graphics with matlab
Date : 2025-12-22 Size : 5kb User : dengdeng
[matlab] ode45-matlab DL : 0: 本程序特别适合于弹道计算等方面使用。比ODE45函数的速度加快了很多，且程序充分展示了Matlab向量运算的强大功能，以及编程的简单快捷。-This procedure is particularly suitable for use ballistic calculations and other aspects. ODE45 faster than a lot of functions and procedures for demonstrating the power of Matlab vector operations, and programming simple and quick.
Date : 2025-12-22 Size : 6kb User : wangbei
[matlab] lorenz DL : 0: [T,Res]=lyapunov(3,@lorenz_ext,@ode45,0,0.5,200,[0 1 0],10);
Date : 2025-12-22 Size : 2kb User : 砺剑工大
[matlab] lorenz MATLAB DL : 0: Lorenz方程程序，采用ode45函数实现，程序简单，方便实现(Lorenz equation application, using ode45 function implementation, procedure is simple, easy to realize)
Date : 2025-12-22 Size : 3.19mb User : binghun1
[matlab] zuoye DL : 0: 使用MATLAB拟合方程、ode45解高阶微分方程。(Using the MATLAB fitting equation, ODE45 solves the higher order differential equation.)
Date : 2025-12-22 Size : 245kb User : 王青见
[matlab] 径向摆 DL : 0: 这是一个关于径向摆实验基于ode45所写的该实验的常微分方程的m文件，但存有错误，需要修改。(This is a m file about the ordinary differential equation of the radial pendulum experiment based on ode45, but there are some errors which need to be modified.)
Date : 2025-12-22 Size : 35kb User : 卡尔卡斯
[matlab] 滑模控制 DL : 0: 滑模控制简单ode45例程及simulink仿真框图，控制对象为直流直流变换器(Simple ode45 routine of sliding mode control)
Date : 2025-12-22 Size : 26kb User : 刚多林末裔

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