pregunats
These are als on the subject of Petri Nets hope that they serve
1 .- What are the Petri nets?
are described as a tool for the graphic nature of design and analysis of discrete event dynamic systems
2 .- What are the two types of nodes composing a petri net?
The two types of nodes, places and transitions represent the variables that define the state of the system (places) and their transformations (transitions).
3 .- How to define a point of entry and an exit site?
Defining a point of entry of the transition a directed arc from place P i a transition T j an exit site is indicated by an arc from the transition to place.
4 .- When we say that a transition is sensitive or validated?
if all its input places are marked.
5 .- When a transition is flanked or triggered?
If you check the event (action) that is associated, in this case is triggered or crosses. The firing of a transition or postage is:
mark is removed from each input place of this transition.
a mark is added to each output place of this transition.
6 .- What are the two conflicts in Petri Nets?
Structural : Also called potential. When all the points of entry to any transition is non-empty intersection (there is a common entry site). This is the case of the above Petri net.
Cash: When there is a structural conflict and also the two transitions are penetrable. Would be the example above with the entry site marking.
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