Structural Analysis And Empirical Study Of Regional Logistics Network Based On Improved Gravity Model

Spatial structure of regional logistics network is regional urban logistics activities in geographical location on the map,is the spatial pattern of regional logistics industry development,mainly embodied in the various logistics activities and production elements and economic relations in the geographic space and distribution characteristics.Therefore,the study on the spatial structure of regional logistics is an important way to understand the integrated and coordinated development of urban logistics activities in the region.Regional logistics activities linked to build the regional logistics network,how to reasonable and effective calculation area between city and city logistics contact strength,thus study of regional logistics network structure,has great theoretical and application value.The traditional gravity model in the treatment of the strength of the connection between the urban and city have good expressive force,but with the rapid development of all kinds of high and new technology,the gravity model calculating results of the past may not be able to meet the demand of the current study.So,need to be combined with the feature of modern logistics industry development,improve the traditional gravity model,the logistics activity to obtain more accurate contact strength as a result,to study the result of the regional logistics network space.Firstly,the comprehensive strength index system of logistics is established,and the comprehensive strength of urban logistics is calculated by using the entropy weight TOPSIS.Considering the geographical location factors and urban status factors of regional cities play an important role in logistics activities,the geographical position factor and urban status factor are added when the gravity model is improved.At the same time,considering that the traditional route distance can not meet the calculation of the logistics connection strength in the information age,the distance of gravity model is fixed as the comprehensive distance between time and geographical distance.Taking into account the mode of transportation in different cities,the corresponding weight of transportation distance is set in different cities.Finally,verify the feasibility of the improved gravity model,and through the improved gravity model to calculate the area of the city logistics activities of the relationship between strength and contact strength according to the logistics activity,using social network analysis method research the spatial structure of regional logistics network.Taking the beijing-tianjin-hebei region as the research background,firstly,the improved gravity model is used to calculate the intensity of logistics activity between cities in the region.Secondly,the social network analysis method is used to analyze the centrality of each node in the beijing-tianjin-hebei region,as well as the evolution of the cohesive subgroup structure and the core-periphery structure of regional logistics activities.Through the structure of the beijing-tianjin-hebei logistics space network,we can evaluate the coordinated development of logistics activities and formulate the next development plan.