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Description: MATLAB边值问题求解的文档和源代码，好东西啊，强烈推举爱女-MATLAB to solve boundary value problems for the documentation and source code, good things ah, strongly favored daughter elected
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Author: 和气会 |
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Description: THIS M-FILE USES THE TRANFER MATRIX METHOD TO EVALUATE THE COUPLED-MODE
％EQUATIONS. THE REFLECTION SPECTRUM OF THE GRATING AND THE TRANSMISSION
％SPECTRUM, DELAY AND DISPERSION OF THE FABRY-PEROT FILTER ARE SIMULATED-THIS M-FILE TRANFER USES THE MATRIX METHOD TO EVALUATE THE COUPLED- MODE EQUATIONS%. THE R EFLECTION SPECTRUM OF THE GRATING AND THE TRANS MISSION% SPECTRUM, DELAY AND DISPERSION OF THE FABRY-Ross PEROT FILTER ARE SIMULATED
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Author: liuliu |
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Description: 如何利用bvp4c解决微分方程的边值问题的几个例子。-Bvp4c how to use differential equations to solve boundary value problems for a few examples.
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Author: 石智伟 |
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Description: (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
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Author: wjl |
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Description: 用bvp4c计算谐振子能级，要求至少计算出两个能级-Bvp4c calculated using harmonic oscillator energy levels, calculated at least two levels
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Size: 51200 |
Author: zsd |
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Description: A n-point BVP solver. Very useful for BVPs.-Very useful for BVPs.
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Size: 3072 |
Author: Darcy Wang |
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Description: 此程序用于求解四阶常微分边值问题的特征值问题，算例说明附在其中。-Finding the eigenvalues for 4-th order (BVP)ODE
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Size: 25600 |
Author: 刘项 |
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Description: 是 COLSYS 的更新版。国外有名的解常微分BVP的求解器，对奇异问题有很好的适应性。-C this package solves boundary value problems for
C ordinary differential equations, as described below.
C
C COLNEW is a modification of the package COLSYS by ascher,
C christiansen and russell [1]. It incorporates a new basis
C representation replacing b-splines, and improvements for
C the linear and nonlinear algebraic equation solvers.
C the package can be referenced as either COLNEW or COLSYS.
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Size: 30720 |
Author: 刘项 |
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Description: 一个用fortran90写成的BVP（ODE）的求解器，作者是写matlab函数bvp4c的作者。原理差不多。不过这个版本是用f90写的，运算速度更快。本包内含如何运这些程序的论文及算例，很好上手。-In the declarations part of this module, we first define the BVP_SOL type, which represents the numerical solution. We next define the interface BVP_INIT, which is overloaded to provide a number of functions for allowing the user to specify initial information for the computation, the interface BVP_EXTEND, which is overloaded to provide functions for extending the numerical solution to a new domain that are useful in the context of parameter continuation, and the interface BVP_EVAL, which is overloaded to provide a function for retrieving solution information. Next a number of global variables employed throughout the code are defined.
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Author: 刘项 |
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Description: FD1D_BVP is a FORTRAN90 program which applies the finite difference method to solve a two point boundary value problem in one spatial dimension.
The boundary value problem (BVP) that is to be solved has the form: -FD1D_BVP is a FORTRAN90 program which applies the finite difference method to solve a two point boundary value problem in one spatial dimension.
The boundary value problem (BVP) that is to be solved has the form:
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Author: 讲演 |
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Description: 应用Matlab计算边界条件，解决最优控制问题。-Matlab Boundary Conditions
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Author: 伊国胜 |
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Description: 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.
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Size: 82944 |
Author: delin |
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Description: finite difference method to solve a 3-D BVP that models heat transfer
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Author: sami |
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Description: function er3OC_num
EG3OC_num Example 3 of optimal control tutorial.
This example is from D.S.Naidu, "Optimal contorl systems"
page 77-80, Example 2.14
The problem is formulated as a BVP and solved with bvp4c numerically
-function er3OC_num
EG3OC_num Example 3 of optimal control tutorial.
This example is from D.S.Naidu, "Optimal contorl systems"
page 77-80, Example 2.14
The problem is formulated as a BVP and solved with bvp4c numerically
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Author: larasmoyo |
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Description: 求解常微分方程组的bvp解算器的使用说明和教程和实例-tutorial and documentary and examples for ODE bvp
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Size: 200704 |
Author: 蔡琰 |
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Description: Solving several BVP s (1D example, 2D wave equation, 2D heat equation, 3D cantilever beam deflection (linear & quadratic elements) with use of very basic FEM techniques.
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Size: 183296 |
Author: Adilson |
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Description: matlab 端面抽运高功率双包层光纤激光器数值仿真，利用bvp4c（）解两点边值问题。-matlab end-pumped high power double-clad fiber laser numerical simulation using bvp4c () BVP for the solution.
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Description: 本书介绍了常用的视觉Fortran的子程序近200名，其中包括：线性方程组，差异性，数值积分，特殊函数，函数逼近，随机数，排序，特征值问题，数据拟合方程求根和非线性方程组求解，极端和优化解决方案功能，傅立叶变换光谱方法，数据的统计描述，常微分方程的解，BVP和解偏微分方程的解决方案。-Total book value calculation commonly used visual Fortran subroutines nearly 200, including: solution of linear equations, difference, numerical integration, special, function approximation, random number, sequence, eigenvalue problems, data fitting equation seek root and solve nonlinear equations, extremes and optimization functions, Fourier transform spectroscopy methods, statistical description of the data, the solution of ordinary differential equations, solution of BVP reconciliation partial differential equations.
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Size: 7118848 |
Author: 包俊 |
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Description: The purpose of this program is to write a function to solve the following BVP using Galerkin Method.
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Size: 3072 |
Author: vahid |
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Description: bvp matlab Contact me Chinese Version GuestBook
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Size: 201728 |
Author: liu1982
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