DEVS M&S Tutorial 2

1. DEVS M&S Tutorial 2 Chungman Seo cseo@email.arizona.edu

2. Contents • DEVSJAVA Lib • DEVS Interface • Expression of Atomic Model • State Diagram • DEVSJAVA code Structure • Atomic model • Coupled model • Exercise : Fire once neuron

3. DEVS Interface • DEVS Supporting Interface • DEVS Modeling Interface • DEVS Simulation Interface

4. DEVS Supporting Interface • Provide a supporting environment for implementing DEVS implementations • Basic data structures • Entity • Content • Message • Port

5. Message-related-Interfaces • ContentInterface • A Pair of port-value • MessageInterface • A collection of contents

6. Ensemble-Interface

7. DEVS Modeling Interfaces

8. Extending the “Core” interfaces • interface dynamicStructureInterface { void addCoupling(String srcName, String p1, String destName, String p2); void removeCoupling(String srcName, String p1, String destName, String p2); void addModel(String ModelName); void removeModel(String ModelName); void addInport(String ModelName, String port); void addOutport(String ModelName, String port); void removeInport(String ModelName, String port);

9. coreSimulatorInterface CoordinatorInterface atomicSimulatorInterface CoupledSimulatorInterface CoupledCoordinatorInterface Simulator Interfaces

10. State Diagram of Atomic Model :Generator

11. State Diagram of Atomic Model :Processor

12. State Diagram of Atomic Model :Transducer

13. Mapping state diagram to Atomic DEVS model

14. Overall Structure of Atomic DEVS with DEVSJAVA

15. Overall Structure of Coupled DEVS with DEVSJAVA

16. receptive refract fire Out Fire-once Neuron Input Firing delay >0 ta = ∞ ta = ∞ Exercise : Fire-Once Neuron

17. State Diagram : Fire-Once Neuron