Freeware Listing: Equations

Lagrange is a function that calculate equations of motion (Lagrange's equations) d/dt(dL/d(dq))- dL/dq=0. It Uses the Lagrangian that is a function that summarizes the dynamics of the system. Symbolic Math Toolbox is required..

  • Publisher: Ivanovich
  • Date: 15-04-2013
  • Size: 10 KB
  • Platform: Matlab, Scripts

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..

  • Publisher: Tingyue Gu
  • Date: 03-01-2013
  • Size: 31 KB
  • Platform: Matlab, Scripts

Differential Equations is a handy application designed to help you solve equations with minimum effort. The program enables you to specify the coefficients by using the keyboard on the main window.

It is designed to calculate the solution to homogeneous and non-homogeneous equations with fixed coefficients.


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  • Platform: Windows 7, WinOther, WinVista

Quadratic Equations Roots Calculator is a handy application designed for the students that need to solve quadratic equations. The program allows you to find the result by entering the coefficients and clicking one button.

The program is developed using Java, Visual Basic and C++ and allows you to select the interface that you find more comfortable.


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  • Platform: WinOther
  • 7math
  • License: Freeware
  • Rating

A program designed to solve equations. Features: Find roots, Find extremums, Calculate integral, Calculate derivative, Find local maximum/minimum, Draw graph, Save results to text & html, Free of charge. Requires: Microsoft .NET Framework 2.0. Welcome....

  • Platform: Win2000, Win7 x32, Win7 x64, Windows Server, WinOther, WinVista, WinVista x64

A video explaining the nature of equations in algebra. Nature of Equations Video | Algebra 1 Help.org..

  • Platform: Mac OS X, Palm OS, Win2000, Win7 x32, Win7 x64, Windows CE, Windows Mobile, Windows Server, Windows Vista, WinOther, WinVista, WinVista x64

ALL-IN-ONE MULTI-PHYSICS FINITE ELEMENT MODELING

Ever wish there was a flexible system for solving all the partial differential
equation problems that come up in science and engineering, so you didn't have
to buy and learn a new software tool for each problem?

Well, now your wish has come true. FlexPDE is a scripted finite element
partial differential equations problem solving environment.

FlexPDE reads your partial differential equation system and problem domain
definition in a natural, easy to learn language, then constructs a finite
element mesh, solves the problem, and presents graphical output of the solution.

  • Platform: Linux, Mac OS X, Windows Server, Windows Vista, WinOther

Chemical Equation Expert is an integrated tool for chemistry professionals and students. You\'ll find complicated work such as balancing chemical equations and related calculations so easy and even enjoyable! Key Feafures -1. An intelligent balancer Chemical Equation Expert balances chemical equations rapidly and accurately. An equation as complicated as: H2+18Ca(CN)2+6NaAlF4+12FeSO4+6MgSiO3+6KI +2H3PO4+12PbCrO4+24BrCl+6CF2Cl2+24SO2 = 12PbBr2+12CrCl3+6MgCO3+6KAl(OH)4+12Fe(SCN)3+ 2PI3+6NaSiO3+18CaF2+110H2O can be balanced in seconds! So, balancing chemical equations will not be your nightmare but a piece of cake from now on.

  • Platform: Win2000, Win7 x32, Win7 x64, Windows Server, WinOther, WinVista
  • PEEI
  • License: Freeware
  • Rating

The program PEEI 4.0.0.0 calculates numerical solutions of systems of partial differential equations that have number of equations equal or greater of the number of unknown functions. This version 4.0.0.0 has the following improvements over the previous ones. Have been improved the GUI, the management of the execution and the execution itself. Was made available the choice between two different methods of resolution of the total system of equations, labeled "normal method" and "other method". The "normal method" is essentially the same of the previous versions, but have been improved its performance and its termination criterion.

  • Platform: Win7 x32, Win7 x64, Windows Server, Windows Vista, WinOther, WinVista, WinVista x64

Converts TeX equations from a file using simple tags to images and replaces them by the corresponding <img> HTML tags in the output file..

  • Platform: WinOther

For an input of n equations, it converges to the solution. For an input of >n equations, there is no exact solution. In this case, the function minimizes sum( (individual equation errors).^2).

  • Platform: Matlab, Scripts

solvesimul.m can be easily adapted to solve more equations but as it stands it will solve 2 unknowns in 2 equations (1 non-linear and one linear). To solve equations of this form... a*x + b*y = A (1) a1*x^2 + b1*y^2 = B (2) ...with fsolve (used by solvesimul.m) you need to rewrite them so that they equal zero. so (1) and (2) become a*x + b*y - A = 0 (1a) a1*x^2 + b1*y^2 - B = 0 (2a) then using a nested function approach (there are many other ways) you can solve some system of non-linear equations. An example, 2*x + 3*y - 8 = 0 4*x^2 + 5*y^2 - 24 = 0 At the MATLAB command-line prompt you run the 'solvesimul' m-file function with the correct arguments i.

  • Publisher: Bruce
  • Date: 08-04-2013
  • Size: 10 KB
  • Platform: Matlab, Scripts

It estimates the Newton Raphson optimization procedure for (m) unknowns of (n) non-linear equations. In case no Jacobian vector is presented, then the initial Jacobian vector is estimated by Broyden Method (multivariate secant approach) and it is then updated using the Sherman Morrison formula. Usage: [x, results] = newtonraphson(@f, @df, startingvals, TolX, MaxIter); f is the M-file containing the functions, while df is the M-file containing the Jacobian vector. In case the tolerance (TolX) or the maximum number of iterations are not specified then the default values are set to: 1e-8 and 500, respectively.

  • Platform: Matlab, Scripts

It is application of of Simulink Block to Cardiac PDE VI1 system of 2 non linear coupled equations of PDE and try to design solution with dicretized space and time and issue in 1D.I associate a Doc file to introduction theory.Just see this page simulink and not for run.I will next time develop application simulink and files to run..

  • Platform: Matlab, Scripts

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 function and the output is the samples of the output signal versus time..

  • Platform: Matlab, Scripts

This code solves the economic dispatch by quadratic programming.Monotonic quadratic Fuel cost equations with Bmn coefficients is considered this model..

  • Platform: Matlab, Scripts

Two mass variable equations with "Aerospace 3Dof Simple Variable Mass Blockset" are compared in a 1Dof frictionless environment. Initial conditions are given in Model Callbacks. Results showed that "Aerospace 3Dof Simple Variable Mass Blockset" uses the incorrect equation..

  • Publisher: Arda
  • Date: 27-04-2013
  • Size: 10 KB
  • Platform: Matlab, Scripts

Saint-Venant equations, motion planning. Move the mouse and watch the waves! See the paper N. Petit and P. Rouchon, "Dynamics and Solutions to some Control Problems for Water-tank Systems" , IEEE Tr. Automatic Control. Vol 47, No. 4, pp. 594-609. 2002..

  • Platform: Matlab, Scripts

LYAPACK is a MATLAB toolbox for the solution of certain large scale problems in control theory, which are closely related to Lyapunov equations. In contrast to the 'lyap' and 'dlyap' command in the MATLAB Control toolbox it uses iterative algorithms and is intended for large, sparse problems..

  • Platform: Matlab, Scripts

This function solve the Riemann problem of a discontinuity in the initial data, about the 1D incompressible Euler equations for an ideal polytropic gas. The calculation can be effectuated also vectorially.

  • Platform: Matlab, Scripts

Equations: Freeware | All

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