效绵县 Introduction Petri Nets:Graphical and Mathematical modeling tools 0 graphical tool ■ visual communication aid o mathematical tool state equations,algebraic equations,etc concurrent,asynchronous,distributed,parallel, nondeterministic and/or stochastic systemsIntroduction ◼ Petri Nets: Graphical and Mathematical modeling tools  graphical tool ◼ visual communication aid  mathematical tool ◼ state equations, algebraic equations, etc ◼ concurrent, asynchronous, distributed, parallel, nondeterministic and/or stochastic systems