| In recent years, the domestic road dangerous chemical transportation accident repeatedly occurred, brought the enormous loss for the people's life and property, posed the serious threat to the environment. Moreover, because our country emergency management works start later, abruptly accident also has the organization establishment simplification, the organization direction pattern is not clear, the contingency plan is imperfect, the technical system support is incomplete and so on.By using the methods of computer technique, simulation and information technique, based on the science of management, mathematical statistic, control theory and behavioral science, the Decision Support System (DSS) provides an interface system with intelligence to help supervisors to make correct decisions on semi-structure and non-structure problems, offering background data, helping clarifying problems, changing and perfecting model, listing possible plans, comparing plans, and etc.In this article, for improve the decision-making of emergency decision-maker, making emergency scheme scientific and rapidly to reducing the losing bring by emergency accident, we try to put the theory of DSS into the emergency decision of road dangerous chemical transportation.This article first analyzes the basal problem of road dangerous chemical transportation, expatiated it from three sides: static side of emergency management, active side of if and emergency guarantee. Then analyzes the core problem of emergency management—emergent decision-making. Analyzes its different compare to general decision-making, and then put two model of it and simulated the model; and advance the method of building then DSS and its collectivity frame, put the particular design of database and model-room of DSS, and lodge the step of system. At last, analyzes the specifically accident case for road dangerous chemical transportation, and simulate it in this system, proving this system' feasibility for the resolve of practicality issue.
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