Multiagent systems to prevent technological risks

The presence of chemical industry in urban area represents a very high technological risk. That is the reson the installation of alert’s sirens to prevent population from danger when an incident happens is became necessary. This installation should have some means which are sufficiently reliable in order to permit the detection of incident in an adequate time. The industrial site survey that permit the detection is nearly given back impossible in a reliable way without using a computer system that takes into account the complexity and the heterogeneity of information needed in this system. The system allowing to survey industrial sites is called Vigil System. It will have recourse to the questioning of information’s systems and to the analysis of information that will be provided to him. Besides, a case based reasoning system allow to make a predictive analysis of the evolution of the situation. To represent and to follow the fast evolution of the situation, we needed a model which must be flexible, reactive and adaptable during execution. The agent paradigm seems to be the way to achieve this adaptive model. The system will permit to take into account the complexity and the adaptability of the Vigil System. The behavior of this system will be able to be self-adaptative in order to take into account the evolution of a situation in which occurs technics incidents. It is based on self-organisation of multiagent systems which allow the Vigil System to selfadaptate to the evolution of situation and to learn from its behavior.