Research On Emer Gency Evacuation Model And Optimization Based On Artificial Fish Swarm Algorithm

With the prosperity of the national econom y,large public places beco me more intensive and large-scale.The public entertainment places have the characteristics of the public,the complexity of the structure,the high concentration of th e internal property,which leads to the in creasing trend of casua lties.Therefore,it is of great p ractical significance to establish a scientific and effective evacuation plan which is an important basis for ensuring the safety of the people in the building.In this thesis,the evacuation plan of Zhuankou stadium in Wuhan is taken as the research object,and the research is focused on the evacuation model and optimization of artificial fish swarm algorithm:(1)The use of artificial intelligence in the field of bionic swarm intelligence optimization algorithm,artificial fish swarm algorithm(AFSA)based modeling method as the evacuation m odel,the m acro and m icro combination,the evacuation of the individual as the artificial fish agent,its definition of discrete vision,step,and fish feeding,rear end,cluster behavior of indi vidual psychological activities,simulation of evacuation route choice and behavior te ndency,the evacuation process sim ulation,finally form the whole evacuation route scheme.(2)More details in order to simulate the evacuation process more practical,but also in order to avoid blind evacuation,we cons truct more scientific evacuation network,establish evacuation of three d imensional logic network,adding hierarchical route guidance strategy in order to solve the distance between node and the exit as the basis to judge the reality;and with m ore accurate mathematical expressions to describe the real evacuation environment and hum an behavior and m ovement process of crowding,retrograde,same layer mobile,time-consuming,blocking waiting time and other factors on the effect of evacuation speed and path de finition and balanced consideration,to use the evacuation time as target function to improve the evacuation efficiency.(3)To get a better solution,this thesis made all the artificial fish back to the starting point for many cycles,each cycle af ter the introduction of pheromone,the release of a certain amount in each side through the update strategy of congestion and the evacuation time of busy degr ee the comprehensive effect of pheromone,improve the public board,in the next cycle of decision-making by pheromone.It can not only reduce the evacuation efficiency,but also improve the utilization of the path and reduce the busy degree.