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ASCEND

Developer(s) the ASCEND team

Stable release 0.9.7 / Dec 24, 2009

Written in C, Python, Tcl/Tk, C++

Operating system Linux, Windows (and partial

support for Mac OS X)

Type mathematical modelling

License GPL (free software)

Website ascend4.org

(http://ascend4.org)

ASCENDFrom Wikipedia, the free encyclopedia

ASCEND is a free, open source, mathematical modellingsystem developed at Carnegie Mellon University since the

late 1978.[1][2] ASCEND is an acronym which stands forAdvanced System for Computations in ENgineering Design.Its main uses have been in the field ofchemical processmodelling although its capabilities are general.[3] It was a

pioneering piece of software in the chemical processmodelling field, with its novel modelling language conventionsand powerful solver, although it has never beencommercialised and remains as an open source software

project.

ASCEND includes nonlinear algebraic solvers,differential/algebraic equation solvers, nonlinear optimisation

and modelling of multi-region 'conditional models'. Its matrixoperations are supported by an efficient sparse matrix solver called mtx.

ASCEND differs from earlier modelling systems because it separates the solving strategy from model building. Sodomain experts (people writing the models) and computational engineers (people writing the solver code) can worseparately in developing ASCEND. Together with a number of other early modelling tools, its architecture helped

to inspire newer languages such as Modelica.[4][5] It was recognised for its flexible use of variables and parameter

which it always treats as solvable, if desired[6]

The software remains as an active open-source software project, and has been part of the Google Summer of

Code programme in 2009, 2010 and 2011.[7]

See also

Art WesterbergAMPLAPMonitorEMSOJModelica.org

ModelicaList of chemical process simulators

References

1. ^ Piela, McKelvey and Westerberg, 'An introduction to ASCEND: its language and interactive environment'(http://dx.doi.org/10.1109/HICSS.1992.183516)

2. ^ History of ASCEND (http://ascend4.org/History) from the ASCEND website3. ^ ASCEND bibliography (http://ascendwiki.cheme.cmu.edu/Publications)4. ^ Elmqvist, Mattsson and Otter, 1999, Modelica-a language for physical system modeling, visualization and

http://dx.doi.org/10.1109/HICSS.1992.183516http://en.wikipedia.org/wiki/ASCEND#cite_ref-3http://ascendwiki.cheme.cmu.edu/Publicationshttp://dx.doi.org/10.1109/HICSS.1992.183516http://en.wikipedia.org/wiki/List_of_chemical_process_simulatorshttp://en.wikipedia.org/wiki/Modelicahttp://en.wikipedia.org/wiki/JModelica.orghttp://en.wikipedia.org/wiki/APMonitorhttp://en.wikipedia.org/wiki/AMPLhttp://en.wikipedia.org/wiki/Art_Westerberghttp://en.wikipedia.org/wiki/ASCEND#cite_note-7http://en.wikipedia.org/wiki/ASCEND#cite_note-6http://en.wikipedia.org/wiki/Sparse_matrixhttp://en.wikipedia.org/wiki/Sparse_matrixhttp://ascend4.org/http://en.wikipedia.org/wiki/Chemical_process_modellinghttp://en.wikipedia.org/wiki/ASCEND#cite_note-1http://en.wikipedia.org/wiki/ASCEND#cite_note-2http://en.wikipedia.org/wiki/ASCEND#cite_ref-4http://ascendwiki.cheme.cmu.edu/Publicationshttp://en.wikipedia.org/wiki/ASCEND#cite_ref-3http://ascend4.org/Historyhttp://en.wikipedia.org/wiki/ASCEND#cite_ref-2http://dx.doi.org/10.1109/HICSS.1992.183516http://en.wikipedia.org/wiki/ASCEND#cite_ref-1http://en.wikipedia.org/wiki/List_of_chemical_process_simulatorshttp://en.wikipedia.org/wiki/Modelicahttp://en.wikipedia.org/wiki/JModelica.orghttp://en.wikipedia.org/wiki/EMSO_simulatorhttp://en.wikipedia.org/wiki/APMonitorhttp://en.wikipedia.org/wiki/AMPLhttp://en.wikipedia.org/wiki/Art_Westerberghttp://en.wikipedia.org/wiki/ASCEND#cite_note-7http://en.wikipedia.org/wiki/ASCEND#cite_note-6http://en.wikipedia.org/wiki/ASCEND#cite_note-5http://en.wikipedia.org/wiki/ASCEND#cite_note-4http://en.wikipedia.org/wiki/Modelicahttp://en.wikipedia.org/wiki/Sparse_matrixhttp://en.wikipedia.org/wiki/Optimization_(mathematics)http://en.wikipedia.org/wiki/Solverhttp://en.wikipedia.org/wiki/ASCEND#cite_note-3http://en.wikipedia.org/wiki/Chemical_process_modellinghttp://en.wikipedia.org/wiki/ASCEND#cite_note-2http://en.wikipedia.org/wiki/ASCEND#cite_note-1http://en.wikipedia.org/wiki/Carnegie_Mellon_Universityhttp://en.wikipedia.org/wiki/Mathematical_modellinghttp://en.wikipedia.org/wiki/Open_sourcehttp://ascend4.org/http://en.wikipedia.org/wiki/Free_softwarehttp://en.wikipedia.org/wiki/GNU_General_Public_Licensehttp://en.wikipedia.org/wiki/Software_licensehttp://en.wikipedia.org/wiki/List_of_software_categorieshttp://en.wikipedia.org/wiki/Mac_OS_Xhttp://en.wikipedia.org/wiki/Microsoft_Windowshttp://en.wikipedia.org/wiki/Linuxhttp://en.wikipedia.org/wiki/Operating_systemhttp://en.wikipedia.org/wiki/C%2B%2Bhttp://en.wikipedia.org/wiki/Tcl/Tkhttp://en.wikipedia.org/wiki/Python_(programming_language)http://en.wikipedia.org/wiki/C_(programming_language)http://en.wikipedia.org/wiki/Software_release_life_cyclehttp://en.wikipedia.org/wiki/Software_developer

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interaction, http://dx.doi.org/10.1109/CACSD.1999.8087205. ^ Karl Johan strm, 2001, Control of complex systems, Springer6. ^ R. Sinha, V.C. Liang, C.J.J. Paredis, and P.K. Khosla, 2001, Modeling and Simulation Methods for Design of

Engineering Systems.Journal of Computing and Information Science in Engineering1 pp. 84-91.7. ^ http://www.google-melange.com/gsoc/projects/list/google/gsoc2011

External links

Official website (http://www.ascend4.org/)ASCEND (http://ascend4.org/) wiki, including documentation and development notes

Retrieved from "http://en.wikipedia.org/w/index.php?title=ASCEND&oldid=514374840"Categories: Simulation programming languages Mathematical optimization software Free simulation software

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