https://ascend4.org/index.php?action=history&feed=atom&title=Integration_of_conditional_modelsIntegration of conditional models - Revision history2026-05-03T19:28:16ZRevision history for this page on the wikiMediaWiki 1.43.6https://ascend4.org/index.php?title=Integration_of_conditional_models&diff=4889&oldid=prevJpye at 08:06, 24 March 20152015-03-24T08:06:33Z<p></p>
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<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[Image:Bouncing-ball.png|thumb|400px|right|A bouncing ball simulated in ASCEND. This is our new implementation which makes use of [[User:Ksenija|<del style="font-weight: bold; text-decoration: none;">Ksenia</del>]]'s new [[EVENT]] syntax. The model files is {{srcbranch|ksenija2|models/ksenija/bball_event3.a4c}}. This supercedes our previously model {{src|models/test/ida/leon/bouncingball.a4c}} by [[User:LeonKwek|Leon Kwek]], which made use of [[WHEN]] syntax, without events. In the earlier model, we needed to model the elasticity of the ball in order to achieve bouncing behaviour. Now, we can directly reverse the direction of the ball's movement, making a faster/simpler model.]]</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[Image:Bouncing-ball.png|thumb|400px|right|A bouncing ball simulated in ASCEND. This is our new implementation which makes use of [[User:Ksenija|<ins style="font-weight: bold; text-decoration: none;">Ksenija</ins>]]'s new [[EVENT]] syntax. The model files is {{srcbranch|ksenija2|models/ksenija/bball_event3.a4c}}. This supercedes our previously model {{src|models/test/ida/leon/bouncingball.a4c}} by [[User:LeonKwek|Leon Kwek]], which made use of [[WHEN]] syntax, without events. In the earlier model, we needed to model the elasticity of the ball in order to achieve bouncing behaviour. Now, we can directly reverse the direction of the ball's movement, making a faster/simpler model.]]</div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>''[[User:Ksenija|Ksenija Bestuzheva]] and [[User:Jpye|John Pye]] are currently working on aspects of this project.''</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>''[[User:Ksenija|Ksenija Bestuzheva]] and [[User:Jpye|John Pye]] are currently working on aspects of this project.''</div></td></tr>
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</table>Jpyehttps://ascend4.org/index.php?title=Integration_of_conditional_models&diff=4880&oldid=prevJpye at 02:42, 23 March 20152015-03-23T02:42:09Z<p></p>
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<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[Image:Bouncing-ball.png|thumb|400px|right|A bouncing ball simulated in ASCEND. <del style="font-weight: bold; text-decoration: none;">With current syntax, we must simulate the elasticity </del>of <del style="font-weight: bold; text-decoration: none;">the ball during the bounce; with future </del>'<del style="font-weight: bold; text-decoration: none;">event' functionality, we will be able to avoid having to model that part of the problem</del>. The model <del style="font-weight: bold; text-decoration: none;">used here </del>is {{src|models/test/ida/leon/bouncingball.a4c}} by [[User:LeonKwek|Leon Kwek]].]]</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[Image:Bouncing-ball.png|thumb|400px|right|A bouncing ball simulated in ASCEND. <ins style="font-weight: bold; text-decoration: none;">This is our new implementation which makes use </ins>of <ins style="font-weight: bold; text-decoration: none;">[[User:Ksenija|Ksenia]]</ins>'<ins style="font-weight: bold; text-decoration: none;">s new [[EVENT]] syntax</ins>. The model <ins style="font-weight: bold; text-decoration: none;">files </ins>is <ins style="font-weight: bold; text-decoration: none;">{{srcbranch|ksenija2|models/ksenija/bball_event3.a4c}}. This supercedes our previously model </ins>{{src|models/test/ida/leon/bouncingball.a4c}} by [[User:LeonKwek|Leon Kwek]]<ins style="font-weight: bold; text-decoration: none;">, which made use of [[WHEN]] syntax, without events. In the earlier model, we needed to model the elasticity of the ball in order to achieve bouncing behaviour. Now, we can directly reverse the direction of the ball's movement, making a faster/simpler model</ins>.]]</div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>''[[User:Ksenija|Ksenija Bestuzheva]] and [[User:Jpye|John Pye]] are currently working on aspects of this project.''</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>''[[User:Ksenija|Ksenija Bestuzheva]] and [[User:Jpye|John Pye]] are currently working on aspects of this project.''</div></td></tr>
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</table>Jpyehttps://ascend4.org/index.php?title=Integration_of_conditional_models&diff=4878&oldid=prevJpye at 02:22, 23 March 20152015-03-23T02:22:19Z<p></p>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[Image:Bouncing-ball.png|thumb|400px|right|A bouncing ball simulated in ASCEND. With current syntax, we must simulate the elasticity of the ball during the bounce; with future 'event' functionality, we will be able to avoid having to model that part of the problem. The model used here is {{src|models/test/ida/leon/bouncingball.a4c}} by [[User:LeonKwek|Leon Kwek]].]]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[Image:Bouncing-ball.png|thumb|400px|right|A bouncing ball simulated in ASCEND. With current syntax, we must simulate the elasticity of the ball during the bounce; with future 'event' functionality, we will be able to avoid having to model that part of the problem. The model used here is {{src|models/test/ida/leon/bouncingball.a4c}} by [[User:LeonKwek|Leon Kwek]].]]</div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>''[[User:Ksenija|Ksenija Bestuzheva]] and [[User:Jpye|John Pye]] are currently working on aspects of this project.''</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>''[[User:Ksenija|Ksenija Bestuzheva]] and [[User:Jpye|John Pye]] are currently working on aspects of this project.''</div></td></tr>
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</table>Jpyehttps://ascend4.org/index.php?title=Integration_of_conditional_models&diff=4877&oldid=prevJpye at 02:16, 23 March 20152015-03-23T02:16:58Z<p></p>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Data structures for [[conditional modelling]] in ASCEND already exist that can represent boundaries arising from real-valued inequality relations, see for example {{src|models/test/ida/boundaries.a4c}}. A good starting point is {{doxy|d2/d74/a00697.html|system/conditional.h}} for the data structures, and {{doxy|d0/df1/a00685.html|system/analyse.h}} for some functions and routines that manipulate those data structures (used by [[CMSlv]]).</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Data structures for [[conditional modelling]] in ASCEND already exist that can represent boundaries arising from real-valued inequality relations, see for example {{src|models/test/ida/boundaries.a4c}}. A good starting point is {{doxy|d2/d74/a00697.html|system/conditional.h}} for the data structures, and {{doxy|d0/df1/a00685.html|system/analyse.h}} for some functions and routines that manipulate those data structures (used by [[CMSlv]]).</div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">There is some helpful discussion about algorithms for event handling as implemented in the OpenModelica compiler/runtime system<ref>Håkan Lundvall and Peter Fritzson, 2005. ''[https://www.modelica.org/publications/papers/2005-10-Lundvall-Fritzson-SIMS05-EventsinOpenModelica.pdf Event Handling in the OpenModelica Compiler and Runtime System]'' SIMS 05 conference (accessed 23 Mar 2015).</ref>.</ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== References ==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== References ==</div></td></tr>
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</table>Jpyehttps://ascend4.org/index.php?title=Integration_of_conditional_models&diff=3573&oldid=prevJpye at 18:38, 19 April 20122012-04-19T18:38:59Z<p></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 18:38, 19 April 2012</td>
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<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[Image:Bouncing-ball.png|thumb|400px|right|A bouncing ball simulated in ASCEND. With current syntax, we must simulate the elasticity of the ball during the bounce; with future 'event' functionality, we will be able to avoid having to model that part of the problem.]]</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[Image:Bouncing-ball.png|thumb|400px|right|A bouncing ball simulated in ASCEND. With current syntax, we must simulate the elasticity of the ball during the bounce; with future 'event' functionality, we will be able to avoid having to model that part of the problem<ins style="font-weight: bold; text-decoration: none;">. The model used here is {{src|models/test/ida/leon/bouncingball.a4c}} by [[User:LeonKwek|Leon Kwek]]</ins>.]]</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>{{task}}</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>{{task}}</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>''[[User:Ksenija|Ksenija Bestuzheva]] and [[User:Jpye|John Pye]] are currently working on aspects of this project.''</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>''[[User:Ksenija|Ksenija Bestuzheva]] and [[User:Jpye|John Pye]] are currently working on aspects of this project.''</div></td></tr>
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</table>Jpyehttps://ascend4.org/index.php?title=Integration_of_conditional_models&diff=3572&oldid=prevJpye at 18:37, 19 April 20122012-04-19T18:37:46Z<p></p>
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<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;"></del></div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>''[[User:Ksenija|Ksenija Bestuzheva]] and [[User:Jpye|John Pye]] are currently working on aspects of this project.''</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>''[[User:Ksenija|Ksenija Bestuzheva]] and [[User:Jpye|John Pye]] are currently working on aspects of this project.''</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">[[Image:Bouncing-ball.png|400px|right|A bouncing ball simulated in ASCEND. With current syntax, we must simulate the elasticity of the ball during the bounce; with future 'event' functionality, we will be able to avoid having to model that part of the problem.]]</del></div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Integration of conditional models means solving dynamic systems of equations ([[ODE]]s or [[DAE]]s) that contain 'branching' or conditional logic. Such systems are also sometimes termed [http://en.wikipedia.org/wiki/Hybrid_system hybrid systems]. For example, if a flow velocity increases over time, we would like the solver to at some point switch from a laminar flow model to a turbulent flow model. This requires a solver that can perform [[boundary detection]] and then turn on and off equations within the model, according to which are applicable at that point in the simulation.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Integration of conditional models means solving dynamic systems of equations ([[ODE]]s or [[DAE]]s) that contain 'branching' or conditional logic. Such systems are also sometimes termed [http://en.wikipedia.org/wiki/Hybrid_system hybrid systems]. For example, if a flow velocity increases over time, we would like the solver to at some point switch from a laminar flow model to a turbulent flow model. This requires a solver that can perform [[boundary detection]] and then turn on and off equations within the model, according to which are applicable at that point in the simulation.</div></td></tr>
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</table>Jpyehttps://ascend4.org/index.php?title=Integration_of_conditional_models&diff=3570&oldid=prevJpye at 18:35, 19 April 20122012-04-19T18:35:26Z<p></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 18:35, 19 April 2012</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>''[[User:Ksenija|Ksenija Bestuzheva]] and [[User:Jpye|John Pye]] are currently working on aspects of this project.''</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>''[[User:Ksenija|Ksenija Bestuzheva]] and [[User:Jpye|John Pye]] are currently working on aspects of this project.''</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[Image:Bouncing-ball.png|400px|right|A bouncing ball simulated in ASCEND. With current syntax, we must simulate the elasticity of the ball during the bounce; with future 'event' functionality, we will be able to avoid having to model that part of the problem.]]</ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Integration of conditional models means solving dynamic systems of equations ([[ODE]]s or [[DAE]]s) that contain 'branching' or conditional logic. Such systems are also sometimes termed [http://en.wikipedia.org/wiki/Hybrid_system hybrid systems]. For example, if a flow velocity increases over time, we would like the solver to at some point switch from a laminar flow model to a turbulent flow model. This requires a solver that can perform [[boundary detection]] and then turn on and off equations within the model, according to which are applicable at that point in the simulation.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Integration of conditional models means solving dynamic systems of equations ([[ODE]]s or [[DAE]]s) that contain 'branching' or conditional logic. Such systems are also sometimes termed [http://en.wikipedia.org/wiki/Hybrid_system hybrid systems]. For example, if a flow velocity increases over time, we would like the solver to at some point switch from a laminar flow model to a turbulent flow model. This requires a solver that can perform [[boundary detection]] and then turn on and off equations within the model, according to which are applicable at that point in the simulation.</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr>
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</table>Jpyehttps://ascend4.org/index.php?title=Integration_of_conditional_models&diff=3473&oldid=prevJpye at 21:33, 5 April 20122012-04-05T21:33:51Z<p></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 21:33, 5 April 2012</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>''[[User:Ksenija|Ksenija Bestuzheva]] <del style="font-weight: bold; text-decoration: none;">is </del>currently working on aspects of this project.''</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>''[[User:Ksenija|Ksenija Bestuzheva]] <ins style="font-weight: bold; text-decoration: none;">and [[User:Jpye|John Pye]] are </ins>currently working on aspects of this project.''</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Integration of conditional models means solving dynamic systems of equations ([[ODE]]s or [[DAE]]s) that contain 'branching' or conditional logic. Such systems are also sometimes termed [http://en.wikipedia.org/wiki/Hybrid_system hybrid systems]. For example, if a flow velocity increases over time, we would like the solver to at some point switch from a laminar flow model to a turbulent flow model. This requires a solver that can perform [[boundary detection]] and then turn on and off equations within the model, according to which are applicable at that point in the simulation.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Integration of conditional models means solving dynamic systems of equations ([[ODE]]s or [[DAE]]s) that contain 'branching' or conditional logic. Such systems are also sometimes termed [http://en.wikipedia.org/wiki/Hybrid_system hybrid systems]. For example, if a flow velocity increases over time, we would like the solver to at some point switch from a laminar flow model to a turbulent flow model. This requires a solver that can perform [[boundary detection]] and then turn on and off equations within the model, according to which are applicable at that point in the simulation.</div></td></tr>
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</table>Jpyehttps://ascend4.org/index.php?title=Integration_of_conditional_models&diff=3282&oldid=prevJpye at 00:06, 11 February 20122012-02-11T00:06:40Z<p></p>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Data structures for [[conditional modelling]] in ASCEND already exist that can represent boundaries arising from real-valued inequality relations, see for example {{src|models/test/ida/boundaries.a4c}}. A good starting point is {{doxy|d2/d74/a00697.html|system/conditional.h}} for the data structures, and {{doxy|d0/df1/a00685.html|system/analyse.h}} for some functions and routines that manipulate those data structures (used by [[CMSlv]]).</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Data structures for [[conditional modelling]] in ASCEND already exist that can represent boundaries arising from real-valued inequality relations, see for example {{src|models/test/ida/boundaries.a4c}}. A good starting point is {{doxy|d2/d74/a00697.html|system/conditional.h}} for the data structures, and {{doxy|d0/df1/a00685.html|system/analyse.h}} for some functions and routines that manipulate those data structures (used by [[CMSlv]]).</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;"></del></div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">Some discussion about a proposed design for this will be conducted at [[Event handling]].</del></div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== References ==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== References ==</div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== See also ==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== See also ==</div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* [[Event handling]] </ins></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* [[Improved DAE syntax]]</ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* [[Conditional modelling]]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* [[Conditional modelling]]</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* [[Integrator API]]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* [[Integrator API]]</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[Category:Development]]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[Category:Development]]</div></td></tr>
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</table>Jpyehttps://ascend4.org/index.php?title=Integration_of_conditional_models&diff=3276&oldid=prevJpye at 23:26, 10 February 20122012-02-10T23:26:01Z<p></p>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Data structures for [[conditional modelling]] in ASCEND already exist that can represent boundaries arising from real-valued inequality relations, see for example {{src|models/test/ida/boundaries.a4c}}. A good starting point is {{doxy|d2/d74/a00697.html|system/conditional.h}} for the data structures, and {{doxy|d0/df1/a00685.html|system/analyse.h}} for some functions and routines that manipulate those data structures (used by [[CMSlv]]).</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Data structures for [[conditional modelling]] in ASCEND already exist that can represent boundaries arising from real-valued inequality relations, see for example {{src|models/test/ida/boundaries.a4c}}. A good starting point is {{doxy|d2/d74/a00697.html|system/conditional.h}} for the data structures, and {{doxy|d0/df1/a00685.html|system/analyse.h}} for some functions and routines that manipulate those data structures (used by [[CMSlv]]).</div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">Some discussion about a proposed design for this will be conducted at [[Event handling]].</ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== References ==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== References ==</div></td></tr>
</table>Jpye