Second Order Differential Equations

This function solves the linear fractional-order differential equations (FODE) with constant coefficients. The short memory principle has not neen used here, so the length of input signal is limited to few hundred samples. The parameters of the FODE (in its standard form) are the inputs of this... Platforms: Matlab

Graphical user interface (GUI) is used to solve up to two ordinary differential equations (ODEs). Results can be plotted easily. Choose between MATLAB's ode45 (non-stiff solver) or ode15s (stiffer solver).This is primarily a teaching tool. Platforms: Matlab

Analysis and simulation of orbits in the circular-restricted three-body problem (CRTBP), where primary and secondary bodies move in circular orbits about the common center of mass, and effect of gravitational attraction of the smallest body are ignored. The applications described here are for... Platforms: Matlab

The program PEEI 3.0.0.0 calculates a numerical solution of almost all the systems of partial differential equations who have number of equations equal or greater of the number of unknown functions. Platforms: Windows

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

Gerris project is an Open Source Free Software library for the solution of the partial differential equations describing fluid flow. Gerris is supported by NIWA (National Institute of Water and Atmospheric research) and by the Marsden Fund of the Royal Society of New Zealand. The code is... Platforms: *nix

the function is GUI that simulate double pendulum by using 4th-order Runge-Kutta algorithm for the differential equations.the differential equation are very similar to eq. (12) and (13) here:http://home1.fvcc.edu/~dhicketh/DiffEqns/spring09projects/LauraStickel/Double%20Pendulum.pdf Platforms: Matlab

This program gives a PI controller for a second order systemwith the damping under control and the controller is of the formKP*(1+1/s*TI). Platforms: Matlab

The wheeled mobile robot dynamics are studied from standard papers available on the topic and non-linear feedback linearlization is done to reduce the equations of motion to a second order dynamic equation of the error of position of the wheeled robot. AVI file recording is also available for... Platforms: Matlab

NBODYVECT - Fully vectorized n-body equationnbodyVect(x0,dx0,mus,t) integrates the n-body equations of motion using either a symplectic second order integrator, or any of the standard built-in or user supplied first order integrators. x0 - 3n x 1 stacked initial position vectors:... Platforms: Matlab

chemfem is a high order finite element method that can solve general partial differential equations and the reacting Navier Stokes equations in particular. Features . 2D PDE solver . Unstructured meshes . Higher order finite elements . Galerkin and Least squares, including discontinuous... Platforms: *nix

Assimulo is a Cython/Python based simulation package for solving explicit ordinary differential equations (ODEs) and implicit ordinary differential equations (DAEs). The idea with Assimulo is to create a basis for simulating differential equations and to be easily extended with other solvers.... Platforms: *nix

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

This e-book is based on the Student Edition of MATLAB 7, which includes a symbolic toolbox. The Professional Edition may of course also be used. The goal is to exploit a restricted subset of MATLAB commands and functions to explore most of the elements of undergraduate mathematics. All items from... Platforms: Matlab

libSDE is a Java library to simulate Stochastic Differential Equations (SDEs). Platforms: Mac

DOLFIN is the C++/Python interface of FEniCS, providing a consistent PSE (Problem Solving Environment) for ordinary and partial differential equations. Features * Simple, consistent and intuitive object-oriented API in C++ or Python * Automatic and efficient evaluation of finite element... Platforms: *nix

20-sim is an advanced modeling and simulation package for Windows. With 20-sim you can simulate the behavior of dynamic systems, such as electrical, mechanical and hydraulic systems or any combination of these. 20-sim models may use iconic diagrams, bond graphs, block diagrams as well as... Platforms: Windows

OpenDiscreteDynamicProgrammingTemplate project founds optimal constrainted parameters of a discrete controls with second order optimization template replacing Hessian with directional derivatives and backpropagation for digital filter(as neural network).. OpenDiscreteDynamicProgrammingTemplate:... Platforms: *nix

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

WordNet::Similarity::vector_pairs is a Perl module for computing semantic relatedness of word senses using second order co-occurrence vectors of glosses of the word senses. SYNOPSIS use WordNet::Similarity::vector_pairs; use WordNet::QueryData; my $wn = WordNet::QueryData->new(); my... Platforms: *nix