Method and system for identifying atmospheric pollution transmission key nodes based on complex network

Abstract

The invention provides a method and system for identifying atmospheric pollution transmission key nodes based on a complex network. The method comprises the following steps of: gridding and abstracting a preset area into the complex network; an HYSPLIT model outputs the flow of the airflow track in a preset area to obtain an adjacent matrix of the airflow track weight; a pollutant concentration interpolation method is adopted to obtain an adjacent matrix of a pollution transmission weight according to the pollutant concentration of the atmospheric pollutant monitoring point position in the preset area; the adjacency matrix of the pollution transmission weight is added to the adjacency matrix of the airflow track weight to obtain an adjacency matrix of the airflow track weight and the pollution transmission weight; an in-degree strength value and an out-degree strength value of each node are calculated by utilizing an improved PageRank algorithm; and regional pollution and governance key points are identified according to the in-degree intensity value and the out-degree intensity value. According to the method, the nodes are established after the specific area is gridded, and the specific area is averagely and comprehensively abstracted, and then complex network analysis is carried out, and the method is comprehensive and accurate.

Description

technical field [0001] The present invention relates to the field of air pollution analysis, in particular, to an identification method and system for key nodes of air pollution transmission based on a complex network, and more specifically, to an identification model for key nodes of regional air pollution transmission based on a complex network . Background technique [0002] With the continuous development of our country's economy, the air quality problem in most parts of our country is also becoming more and more serious. Severe air pollution has had a serious impact on people's bodies and lives; monitoring air pollution in different regions is of great significance for air pollution control. [0003] There are many applications of using the PageRank algorithm to calculate key nodes in Internet networks, public transportation and other fields, but there are very few applications in the calculation of key nodes in the diffusion of air pollutants and regional air pollutio...

AI Technical Summary

Problems solved by technology

[0004] patent document CN110363350A (201910633683.7) discloses a regional air pollutant analysis method based on a complex network, and has tried to abstract the region and apply the PageRank algorithm to calculate the PageRank value of the node , but 1) its nodes are based on ambient air quality monitoring stations, the number is small and unevenly distributed, and the results are not representative (the patent we applied for is to grid the entire area, and each grid point is a node); 2) use The accuracy of the connection between nodes and nodes is not high in the calculation of wind speed and wind direction angle (the patent we applied for is to use the HYSPLIT mode to calculate the airflow trajectory of each grid, and the information of each grid point that the airflow trajectory passes through can establish the relationship between nodes and nodes. The connection between nodes, the accuracy is greatly improved), 3) The transmission weight between nodes is based on the difference of AQI. Since AQI is the calculation result of six pollutants, there is no theoretical basis for using it as a calculation factor of pollution weight (In the patent we applied for, the weight can be calculated separately based on each pollutant, and the in-degree intensity value and the out-degree intensity value can be calculated for each air pollutant, which is very important for accurate implementation of pollution control and accurate optimization of monitoring network points 4) Its purpose is to predict air quality (the patent we applied for is to identify key nodes in the transmission of air pollution)

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