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Outils formels et opérationnels pour la modélisation et la simulation des systèmes complexes

Abstract : The modeling of complex systems is generally based on their decomposition in sub-systems easier to handle. This division has to be made in a methodical way by identification and complete definition of the various structures, actions, and interactions of these sub-systems. The behaviour of overall model arises from the emergence of the model‟s behaviours of these sub-systems. The work presented in this thesis is a contribution in the modeling and simulation field of the complex systems particularly, the complex industrial processes. Our approach is based mainly on the transformation of a DEVS model (Discrete EVent system Specification) into agent model so that it can be simulated in the multi-agents platforms in particular, based on AGR model (Agent/Group/Role) which is the subjacent conceptual model of organizational model AALAADIN. The use of this model is for the organization of the system to be simulated during the transformation phase into groups of agents while determining all the interactions between the groups and the agents as well as the roles played by the agents in these groups seems to be the most suitable solution. This is concerns an algorithm with a set of functions and procedures which make it possible to transform these models systematically. In the recommended approach and on the implementation step; the decomposition of those systems into sub-systems appears on two levels: On the lower level; the decomposition concerns the division of global system into atomic and coupled models based on DEVS formalism. Both obtained atomic and coupled models are formally verified and validated. At the higher lever, the implementation of those models is done through the use of Multi-Agents Systems (MAS). Thus, the atomic models are transformed into agents and coupled models into groups of agents. A version of this work was implemented on multi-agents platform MAD-KIT to realize an industrial simulator an industrial simulator. The advantage of this approach is its adaptability as well as the possibilities of extension. Moreover, the decomposition into sub-systems reduces significantly the complexity of the elements being implemented and therefore, allows a great modularity and a best legibility to the system. Our work is realized in collaboration with the production and technique departments of natural gas liquefaction (GL1/K Skikda), one of the principal hydrocarbons poles from SONATRACH complex in Algeria.
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Submitted on : Sunday, March 3, 2019 - 2:55:35 PM
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Noureddine Seddari. Outils formels et opérationnels pour la modélisation et la simulation des systèmes complexes. Modélisation et simulation. Université de Skikda, 2015. Français. ⟨tel-02055182⟩



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