Search Results for "equations" - Page 6
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Showing 373 open source projects for "equations"
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ObjectVolume
Calculates Volume, Surface Area & Centroid of a Closed Triangular Mesh
...A detailed description of the process is presented in the ObjectVolumeTutorial.doc document as well as program logic and results. A key component in the program is a subroutine that calculates the volume of a tetrahedron. Four sets of equations were tested and to my surprise all four produced similar results in accuracy and timing. -
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F3DM
Finite Element Method on 3D Meshes
...Three main features in unstable 1.8.x version (available via GIT): quadratic elements, periodic boundary conditions, and the solver for scalar and electromagnetic wave equations. f3dmgeom is a collection of a few simple tools for creating surface meshes for tetgen. It can handle simple geometries only. -
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PBTK Optimizer
Application for optimization of parameters in PBTK models
...Some parameters used in PBTK models, such as tissue weights, are easily measure. Other parameters can be determined through in-vitro experiments or through extrapolation using published equations. When it is impractical to use these methods to estimate a parameter, techniques can be used to optimize parameters so that model results best fit validation data. This tool was designed to optimize a user-specified list of parameters to a user-specified PBTK model. The user also controls validation data and optimization algorithms. ... -
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AdaAutoDiff
C++ Templates and Ada Package for Automatic Differentiation
Operators are overloaded so that a normal looking function definition provides access to not only evaluations of itself, but to evaluations of any of its analytic derivatives. Automatic differentiation means the user does not need to define the analytic expressions for all the various partial derivatives. It also means that those complex expressions are essentially calculated at compile time, and merely evaluated at runtime. First order derivatives only, forward... -
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difgames
Differential games
Differential games solved by the HJBI equations (Hamilton-Jacobi-Bellman-Isaacs) with graphical display of the solutions, with a program in C for Linux. -
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Pascalloid Calc
Hui or Pascal's Triangle into shaped Geometry, 3D
Pascal's Triangle has been taken into higher dimensions. The Five Platonic Solids are included in this software, along with various geometric algorithms to create a generative geometry system. Equations in combinatoric and algebraic forms are given. Tools to play with the data are given. There is now a way to create user-defined algorithms. Dodecahedral and Icosahedral Pascalloids are now geometrically perfect and include no 'folding errors'. A 'data only' data output mode allows users to copy and paste the geometry data into any spreadsheet. ... -
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Zazu
A fully extensible and open source launcher for hackers and creators
Zazu, is a cross-platform and fully extensible and open source launcher for hackers, creators, and dabblers. Download it from the releases page. Zazu was created to be a fully open source alternative to Alfred, but also be completely plugin-based. You can remove any functionality you don't like, so if you hate the built-in calculator, just get a new one. We also have all of your configuration in a dotfile in ~/.zazurc.json so it can be backed up and synced. -
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Multiple Interacting Instantiations of Neural Dynamics is a framework for simulating large neuronal networks. The framework comes with useful implementations of neural dynamics, such as Wilson-Cowan or population density equations, but can be extended.
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Merupu
Electromagnetic Analysis Software
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BigDecimal
Arithmetic and calculus with decimal numbers of arbitrary precision.
BigDecimal is a C # library that uses System.Numerics.BigInteger in its implementation, adding only a decimal place quantizer. In BigDecimal all the arithmetic operations are implemented, including, logarithms, systems resolution of linear equations, trigonometric functions, polynomial regression, hyperbolic functions, the notorious gamma function (factorial for non-integer real numbers) and more that will be implemented still. My intention is, at a minimum, to implement all the mathematical functions of the Windows calculator, and at most, if any, all the mathematical functions of Office Excel. -
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CFD Python
Sequence of Jupyter notebooks featuring the 12 Steps to Navier-Stokes
CFD Python, a.k.a. the 12 steps to Navier-Stokes, is a practical module for learning the foundations of Computational Fluid Dynamics (CFD) by coding solutions to the basic partial differential equations that describe the physics of fluid flow. The module was part of a course taught by Prof. Lorena Barba between 2009 and 2013 in the Mechanical Engineering department at Boston University (Prof. Barba since moved to George Washington University). The module assumes only basic programming knowledge (in any language) and some background in partial differential equations and fluid mechanics. ... -
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FilterPy
Python Kalman filtering and optimal estimation library
...The package also includes particle filters, least-squares filters, fading-memory filters, g-h filters, discrete Bayes methods, and H-infinity tools. Its code favors readability and close correspondence with the underlying equations. NumPy and SciPy handle the numerical work, with Matplotlib commonly used for visualization. The library accompanies the book Kalman and Bayesian Filters in Python and is useful for learning, prototyping, tracking, navigation, and estimation experiments. -
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FunctionalCalculator
A functional maths program calculating with functions
...Among the User-Functions you find: * The integral of f(x) from a to b * The derivative of f(x) * The Ternary Conditional * The gcd of two integers * Solve a System of Linear Equations FunctionalCalculator has a Grammar, which allows you to define you own recursive (meta) functions. The desktop edition has a functional and procedural scripting language based on this grammar and a plotter for complex functions and for real functions. -
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SoDiOpt
A numerical solver for optimization-constrained differential equations
SoDiOpt is a MATLAB-based code that performs numerical integration of Optimization-Constrained Differential Equations (OCDE). SoDiOpt provides efficient numerical solution of OCDE by using the optimality-based solution method. A sequence of DAE systems are generated and classical index-1 DAE simulator is applied to solve the derived DAE systems. -
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bookdownplus
Use R package bookdown for writing varied types of books and documents
...It is a collection of multiple templates on the basis of LaTeX, which is tailored so that I can work happily under the umbrella of bookdown. bookdownplus helps you write academic journal articles, guitar books, chemical equations, mails, calendars, and diaries. bookdown features the collaboration of many fantastic tools. However, an R beginner might be confused or depressed in struggling in the flood of LaTeX, YAML, Markdown, Pandoc, etc. It would be a pity if users stopped their steps at the door and gave up the courage to enter the wonderful world of bookdown. bookdownplus is the easiest shortcut to the world of bookdown. ... -
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Numerics for Chemical Engineering
Numerical models for chemical and process engineering
NCE Calculation Framework is a library of routines, models and data applicable to chemical and process engineering calculations, written in Java. -- NEW -- www.chesolver.com *ONLINE CALCULATORS*. A set of solvers to perform calculations consistently on any device, from smart-phone to desktop. The project includes the following ready to use software all based on the same core library: * Online Calculators at www.chesolver.com * Extensions for Libreoffice/Openoffice Calc... -
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Finita
Package for solving PDE systems numerically
Finita is a software package for solving complex algebraic/differential systems of equations numerically using various grid methods. -
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Descend
Program for drawing 3D surfaces from parametric equations
Descend is an open source program for drawing 3D surfaces from parametric equations. It uses a custom, very fast language called Misc to calculate the geometry. It also uses OpenGL to render scenes with high quality shaders. Website: https://descend.mimec.org/ -
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OpenRTDynamics
A framework for implementing real-time control systems
- - - T H I S P R O J E C T M O V E D T O G I T H U B - - - A framework for the implementation of advanced real-time control systems which uses signal/block-based schematics (like Simulink) extended by several features like state machines and online-exchangeable sub-simulations. Besides, this framework properly handles multiple threads, their communication, allows to synchronise control systems to external events (e.g. variable timers or incoming network packages) and provides... -
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PD_BiochemicalSystemsTheory
A model of Parkinson’s disease using biochemical systems theory
Major pathways involving in Parkinson's disease (PD) such as alphasynuclein aggregation, dopamine synthesis, lewy body formation, tau phosphorylation, parkin, and apoptosis were modeled using stochastic differential equations. Pathways were modeled and simulated using the biochemical pathway visualization program CellDesigner, a modeling tool for gene-regulatory and biochemical networks that support graphical notation and listing of symbols. The model allows a qualitative analysis of PD and a key signalling pathways for evaluating PD treatment conditions relating pathophysiology to molecular concentration changes recorded in experiments. -
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SODE
Program to solve differential equations using long Taylor series
Program to generate a program to numerically solve either a single ordinary differential equation or a system of them.It is a Ruby program, now called omnisode, which generates either Ruby, C, C++, Maple or Maxima code. Code can be generated for all languages under Linux. Ruby can be generated under Windows. All can be generated under cygwin, but would need work on execution of Maple. Omnisode itself is Ruby, which is needed in all cases to generate the program. -
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ZeGrapher
Fast and easy to use plotting software.
ZeGrapher is a free and open source software for plotting mathematical objects (functions, sequences, parametric equations) and experimental data on the plane. This software is intended to be as easy to use as possible, suitable for high school students. -
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MagNes
A modular C++ API for chemical structure handling and representation
...MagNes currently provides: -A complete C++ API for managing of chemical information -A rich set of parsers (PDB, XYZ, Gaussian and many others) -An OpenGL based visor for molecular rendering. -A C++ API for implementation of Karplus-like equations for prediction of NMR scalar couplings. -
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NGSolve is a general purpose Finite Element Library on top of Netgen. With the basic library one can solve heat flow equations, Maxwell equations, and solid mechanical problems. Several add-ons are available for particular application classes. New paper: J. Schöberl: "C++11 Implementation of Finite Elements in NGSolve", ASC Report 30/2014, Institute for Analysis and Scientific Computing, Vienna University of Technology, 2014 http://www.asc.tuwien.ac.at/~schoeberl/wiki/publications/ngs-cpp11.pdf
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CoRoPa stands for Computational Rough Paths. The aim of CoRoPa is to provide a software framework for various ideas related to Rough Path Theory, including rough differential equations and the digital description of serial data streams.
