ii32untimedpetrinets.htm

来自「matlab的petri网工具包」· HTM 代码 · 共 61 行

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<title>II.3.2. Untimed Petri Nets</title>
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<p class=heading-2>II.3.2. Untimed Petri Nets</p>
<p class=heading-2-p>&nbsp;</p>
<p align="justify" class=normal>The sequencing of the events is reduced to simply 
  ordering their occurrences. The simulation runs by firing the transitions one-by-one, 
  in accordance with the <i>transition firing rule</i>. The <b><i>PN Toolbox</i></b> 
  stores all the enabled transitions in a MATLAB array but only one transition 
  fires at a time. The function that returns the next transition to be fired makes 
  the decision according to the priorities or probabilities assigned to conflicting 
  transitions from the <b><i><a href="i22modelingmenu.htm#Resolution">Modeling/<u>R</u></a></i></b><a href="i22modelingmenu.htm#Resolution"><b><i>esolution 
  for Conflicting Transitions</i></b></a> command.</p>
<p align="justify" class=normal>&nbsp; </p>
<p align="justify" class=normal id="events">For the simulation modes <b><i>Step</i></b> and 
  <b><i>Run Slow</i></b>, the <b><i>Events</i></b> counter in the <b><i><a href="i8statuspanel.htm">Status 
  Panel</a></i></b> is indexing and the currently firing transition gets the red 
  color (by default) or an arbitrary color (selected by the user from the option 
  <b><i><a href="i25simulationmenu.htm#Pref">Simulation/Preferences</a></i></b>). 
  After it is fired, a transition returns to the background color.</p>
<p align="justify" class=normal>&nbsp; </p>
<p align="justify" class=normal>The usage of the <b><i><a href="ii38scope.htm">Scope</a></i></b> 
  and <b><i><a href="ii37diary.htm">Diary</a></i></b> facilities is not relevant 
  for this type of PN.</p><hr>
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