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Finite Difference Equation freeware
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Finite Difference Equation

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Added: March 08, 2010 | Visits: 1.316

Python Stencil Environment Python Stencil Environment also know as PySE is a new python library for solving Partial Differential Equations with the Finite Difference Method (FDM). This is still a quite new library, and the current release must be considered as beta software. It is quite rough around the edges,...



Platforms: *nix

License: Freeware Size: 94.21 KB Download (134): Python Stencil Environment Download

Finite Difference Laplace Equation Solver using unequal square grid xy grids The attachment contains:1. Related matlab files.2. Picture files of possible outputs.3. A read me text file.4. A report containing detailed explanations about the basics and about coding algorithm used herein.Finite difference (central) method is applied and solution is obtained for the stream...





Platforms: Matlab


Added: July 05, 2013 | Visits: 243

Spiral waves in monodomain reaction-diffusion model Matlab implementation of a monodomain reaction-diffusion model in 2-D. The model equations are a variant of the Fitzhugh-Nagumo equations modified to simulate the cardiac action potential. The progression of the two normalized state variables, membrane voltage (v) and recovery (r), is computed...


Platforms: Matlab

License: Freeware Size: 10 KB Download (21): Spiral waves in monodomain reaction-diffusion model Download

Added: March 26, 2013 | Visits: 234

fdtd1d.m A simple one-dimensional finite-difference time-domain (FDTD) electromagnetic routine that allows the user to specify arbitrary permittivity, permeability and conductivity profiles. Useful for helping students to visualize reflection, transmission, wave velocity and impedance concepts. Will also...


Platforms: Matlab

License: Freeware Size: 10 KB Download (18): fdtd1d.m Download

Added: November 10, 2013 | Visits: 247

Meep FDTD Meep (or MEEP) is a free finite-difference time-domain (FDTD) simulation software. Meep FDTD is a free finite-difference time-domain (FDTD) simulation software package developed at MIT to model electromagnetic systems, along with our MPB eigenmode package. Here are some key features of "Meep...


Platforms: *nix

License: Freeware Size: 747.52 KB Download (23): Meep FDTD Download

Added: July 25, 2013 | Visits: 269

Finite Difference Beam Propagation Method Simulation of a gaussian pulse propagated in free space through 1000 um, using finite differences.Just run the script and you'll get a surface which is made up of the pulse propagated at 1 um steps.


Platforms: Matlab

License: Freeware Size: 10 KB Download (21): Finite Difference Beam Propagation Method Download

Added: June 24, 2013 | Visits: 218

Global tsunami simulation GUI Global tsunami can be started with asteroid impact or earthquake or thermonuclear bomb. It simulated with 2d wave equation. It is wave equation on sphere surface. Land influence neglected. triangular mesh used. The method is some kind of finite difference method. See fromulas in laplacian.jpg...


Platforms: Matlab

License: Freeware Size: 1.03 MB Download (19): Global tsunami simulation GUI Download

Added: May 16, 2013 | Visits: 282

temperature analysis using finite difference method Study of heat transfer and temperature of a 1x1 metal plateheat is dissipated through the left right and bottom sides and emp at infinity is t n(n-1) points in consideration,Temperature at top end is 500*sin(((i-1)*pi)/(n-1)A*Temp=U where A is coefficient matrix and u is constant matrixfinite...


Platforms: Matlab

License: Freeware Size: 10 KB Download (20): temperature analysis using finite difference method Download

Added: April 03, 2013 | Visits: 241

fminconCSD Complex step differentiation (CSD) is a superior numerical differentiation approach. Normally, it is more efficient and accurate than finite difference appraoch. This package provides a way to improve the MATLAB fmincon function using the CSD.


Platforms: Matlab

License: Freeware Size: 10 KB Download (19): fminconCSD Download

Added: September 08, 2013 | Visits: 231

lsqnonlinCSD Complex step differentiation (CSD) is a superior numerical differentiation approach. Normally, it is more efficient and accurate than finite difference appraoch. This package provides a way to improve the MATLAB lsqnonlin function using the CSD.


Platforms: Matlab

License: Freeware Size: 10 KB Download (19): lsqnonlinCSD Download

Added: June 28, 2013 | Visits: 380

Heating and Cooling a Cylinder Model The Heating and Cooling a Cylinder model computes the radial temperature distribution within a long cylinder as it is heated and cooled by a surrounding fluid. The cylinder is broken into shells and the temperature of each shell is computed using a finite difference approximation to the radial...


Platforms: Mac

License: Freeware Size: 10.24 KB Download (20): Heating and Cooling a Cylinder Model Download

Added: November 24, 2010 | Visits: 605

PETSc PETSc is a suite of data structures and routines for the scalable (parallel) solution of scientific applications modeled by partial differential equations. PETSc library employs the MPI standard for all message-passing communication. PETSc is easy to use for beginners. Moreover, its careful...


Platforms: *nix

License: Freeware Size: 9.8 MB Download (87): PETSc Download

Released: September 25, 2012  |  Added: September 25, 2012 | Visits: 339

WDSolve WDSolve is a black box solver for nonlinear hyperbolic partial differential equations. WDSolve is based on the Wave Digital method, leading to explicit finite difference schemes with superior stability properties.


Platforms: Windows

License: Freeware Size: 5 MB Download (44): WDSolve Download

LMFsolve.m: Levenberg-Marquardt-Fletcher algorithm for nonlinear least squares problems The function LMFsolve.m serves for finding optimal solution of an overdetermined system of nonlinear equations in the least-squares sense. The standard Levenberg- Marquardt algorithm was modified by Fletcher and coded in FORTRAN many years ago. LMFsolve is its essentially shortened version...


Platforms: Matlab


Added: August 23, 2013 | Visits: 261

LMFnlsq - Solution of nonlinear least squares The function The LMFnlsq.m serves for finding optimal solution of an overdetermined system of nonlinear equations in the least-squares sense. The standard Levenberg- Marquardt algorithm was modified by Fletcher and coded in FORTRAN many years ago (see the Reference). This version of LMFnlsq is...


Platforms: Matlab

License: Freeware Size: 870.4 KB Download (21): LMFnlsq - Solution of nonlinear least squares Download

Added: July 20, 2013 | Visits: 179

MAxSym MAxSym is a MATLAB tool for the simulation of two-dimensional, non-uniform, axi-symmetric groundwater flow in saturated, porous media. MAxSym solves the governing partial differential equation using a finite-difference approach (Louwyck et al., in press). The model is axi-symmetric, which means...


Platforms: Matlab

License: Freeware Size: 3.32 MB Download (21): MAxSym Download

Added: September 24, 2010 | Visits: 638

PDL::Fit::Levmar PDL::Fit::Levmar is a Perl module with Levenberg-Marquardt fit/optimization routines. Levenberg-Marquardt routines for least-squares fit to functions non-linear in fit parameters. This module provides a PDL ( PDL::PDL ) interface to the non-linear fitting library levmar (written in C). Levmar...


Platforms: *nix

License: Freeware Size: 122.88 KB Download (82): PDL::Fit::Levmar Download

Added: May 10, 2013 | Visits: 293

atlc atlc is an Arbitrary Transmission Line Calculator (for transmission lines and directional couplers).There are 12 programs that comprise the package atlc. One of the programs is called atlc; the other 11 have different names. Using the programs comprising the package atlc one is able to:-Calculate...


Platforms: *nix, C/C++, BSD

License: Freeware Download (31): atlc Download

Added: May 31, 2013 | Visits: 203

Unconstrained optimization using Newton Ok, yes, my expectation was that when I saw this, before I downloaded it I expected it to be a student's homework assigment. In fact, this is a reasonably carefully crafted tool.One serious issue is that this code requires you to provide explicit functional forms for the gradient and Hessian....


Platforms: Matlab

License: Freeware Size: 10 KB Download (18): Unconstrained optimization using Newton Download

Added: September 05, 2013 | Visits: 220

An Example of Markov Chain and multinominal option pricing As a coursework, we are required to price a double barriers knock-in binary put option. We used finite difference method in 24 ways and multinomial lattice in 12 ways. We also implemented analytic and Markov chain method. At the end, we compared these four methods and Monte Carlo method.In this...


Platforms: Matlab

License: Freeware Size: 358.4 KB Download (19): An Example of Markov Chain and multinominal option pricing Download

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