| The current situation of air pollution in China is still severe,especially the uncontrolled emission of harmful gases generated during industrial production is one of the most important factors leading to the increasing air pollution problem.The special nature of air pollution caused by industrial emissions and the complexity of cross-domain transmission become a great challenge for the development of efficient linkage mechanisms between cities.Therefore,it is necessary and urgent to study how to maximize the stable operation of the air environment system while reducing the losses caused by industrial pollution sources in the case of cross-domain transmission as a perspective.The research work of this paper is as follows:First,in order to increase the knowledge and understanding of the mechanism of cross-domain transport of pollutants,the characteristics of cross-domain flow of industrial pollutants in the study area are clarified.By analyzing the regional distribution characteristics and emission characteristics of industrial pollutant sources in the study area,the perturbation factors of the urban atmospheric environmental system are clarified.Using meteorological data from GDAS,the daily concentration dispersion and pollutant deposition of each industrial pollutant source are simulated by Eulerian method based on HYSPLIT forward trajectory model,and the spatial and temporal distribution characteristics of industrial pollutants are clarified;the Lagrangian method is used to track the moving direction of particles carried by airflow,simulate the pollutant dispersion trajectory,construct a pollutant cross-domain flow region,clarify the pollutant transport process among various urban atmospheric environmental subsystems,analyze the transport characteristics of industrial pollutant cross-domain flow,and provide data support for the following analysis of urban atmospheric environmental system resilience level.Secondly,by constructing an index system for evaluating the resilience of urban air environment system,a model for evaluating the resilience of urban air environment system under industrial pollution emission is proposed.The model is based on the PSR model,which is fitted with the process of urban atmospheric environment system being disturbed,and the resilience evaluation indexes are dynamically selected from the pressure caused by the disturbance factor,the state of the system and the response made during the disturbance,and then the recovery of the system after the disturbance occurs and the construction of the resilience enhancement of the whole system,to build the urban atmospheric environment system resilience evaluation index system,meanwhile,the game theory,the Finally,the RMA-PSR model is constructed based on the risk matrix theory and PSR model,and the spatio-temporal analysis is used as a means to measure the resilience level of the urban atmospheric environment system during the study period,which realizes the transition from the theoretical model to the empirical model.Finally,by modeling the dynamic process of a series of system responses in the face of a continuous disturbance event,an interactive impact model of industrial pollutant cross-domain flow on the resilience of urban atmospheric system is proposed,which overcomes the shortcomings of existing models that can only describe the process of system performance change in the case of a single sudden disturbance.The model reclassifies and characterizes the resilience based on the characteristics of the urban atmospheric system,and gives the changes of the system performance in time series when facing a continuous disturbance.Then the Petri net model with time delay function is constructed based on the transmission characteristics of industrial pollutants flowing across the domain,the basic theory of traditional Petri net and the elements of the study area.On this basis,the concepts of library properties and methods are introduced to the Petri net model to make its realistic meaning clear and to have the ability to describe and analyze the flow relationships generated between urban atmospheric environmental systems on the diffusion path.Finally,in order to measure the whole process comprehensively,a comprehensive evaluation index is proposed to measure the comprehensive resilience level of the urban atmospheric system in the case of crossdomain transport of pollutants,which provides the necessary reference for protecting and maintaining the urban atmospheric system in a healthy and stable state and formulating inter-city joint prevention and control plans.At present,existing studies have made certain contributions to the evaluation of urban atmospheric environmental system,but there are still relatively few studies introducing the concept of resilience into the evaluation of urban atmospheric environmental system,especially the modeling methods and studies on the resilience evaluation of urban atmospheric environmental system from the perspective of crossdomain transport of pollutants from pollution sources are still in the exploration stage.To address the shortcomings of the above research problems,this paper reveals the characteristics of cross-domain flow of industrial pollutants in the study area,constructs a resilience assessment model of urban atmospheric environment system under industrial pollution emission,proposes the modeling method of Petri net of time delay function,and establishes the interactive influence model of cross-domain flow of industrial pollutants on the resilience of urban atmospheric environment system.It not only extends the theory and method of urban atmospheric environmental system resilience assessment,but also has certain application value. |
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