The expansion of city scale and ceaseless rise of population density are advanced by urbanization process. It's an urgent problem to make an effective emergency evacuation plan with the purpose of evacuating pedestrian to safe places fast and orderly when danger happens. Many researches are done on this field, and virtual node approach is applied to network flow problem a lot. The staged evacuation algorithm based on road network for single exit is combined with virtual node approach which is applied to mul...
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