scholarly journals Comparative Analysis of city connection network Based on Gravity Model and Baidu Index in Wuhan urban agglomeration

2020 ◽  
Vol 446 ◽  
pp. 022050
Author(s):  
Weilin Ma ◽  
Yan Yu ◽  
Wenqing Meng ◽  
Jian Fan
Keyword(s):  
Comparative Analysis ◽  
Gravity Model ◽  
Urban Agglomeration ◽  
Wuhan Urban Agglomeration

scholarly journals Integration Development of Urban Agglomeration in Central Liaoning, China, by Trajectory Gravity Model

2021 ◽  
Vol 10 (10) ◽  
pp. 698
Author(s):  
Ruren Li ◽  
Shoujia Li ◽  
Zhiwei Xie
Keyword(s):  
Gravity Model ◽  
Gravitational Force ◽  
Main Idea ◽  
Correlation Coefficients ◽  
Urban Agglomeration ◽  
Economic Research ◽  
The Core ◽  
Proposed Model ◽  
Two Indices ◽  
Spatial Trajectory

Integration development of urban agglomeration is important for regional economic research and management. In this paper, a method was proposed to study the integration development of urban agglomeration by trajectory gravity model. It can analyze the gravitational strength of the core city to other cities and characterize the spatial trajectory of its gravitational direction, expansion, etc. quantitatively. The main idea is to do the fitting analysis between the urban axes and the gravitational lines. The correlation coefficients retrieved from the fitting analysis can reflect the correlation of two indices. For the different cities in the same year, a higher value means a stronger relationship. There is a clear gravitational force between the cities when the value above 0.75. For the most cities in different years, the gravitational force between the core city with itself is increasing by years. At the same time, the direction of growth of the urban axes tends to increase in the direction of the gravitational force between cities. There is a clear tendency for the trajectories of the cities to move closer together. The proposed model was applied to the integration development of China Liaoning central urban agglomeration from 2008 to 2016. The results show that cities are constantly attracted to each other through urban gravity.

scholarly journals Spatial Network Structures of Urban Agglomeration Based on the Improved Gravity Model: A Case Study in China’s Two Urban Agglomerations

Complexity ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-17
Author(s):  
Yubo Zhao ◽  
Gui Zhang ◽  
Hongwei Zhao
Keyword(s):  
Gravity Model ◽  
Yangtze River Delta ◽  
Urban Agglomeration ◽  
Spatial Distance ◽  
Range Limit ◽  
Population Mobility ◽  
Urban Agglomerations ◽  
City Network ◽  
The City

Research on urban agglomerations from the perspective of network spatial structure is important to promote their sustainable development. Based on online and traditional data, this paper first improves three aspects of the traditional spatial gravity model—city quality, the gravitation coefficient, and city distance—considering urban center functional intensity and population mobility tendencies. The resulting improved directional gravity model is applied to analyze the structure of the city network for two urban agglomerations in China, the Beijing-Tianjin-Hebei urban agglomeration (BTHUA) and the Yangtze River Delta urban agglomeration (YRDUA). The results of the study are as follows: (1) the existing urban connections have obvious hierarchies and imbalances, with the YRDUA urban hierarchical connections being of larger scale. (2) Cities are closely connected, but city networks are unbalanced, though the YRDUA has more balanced urban development. (3) Each node city has a clear radiation range limit, and spatial distance remains an important constraint on urban connections. The backbone network of the BTHUA has a triangular shape and trends toward a “sparse north and dense south,” while the YRDUA is characterized by multiple axes and an overall distribution that trends toward a “dense north and sparse south.” (4) Cities with poor comprehensive strength are more likely to be captured, forming an attract and be attracted relationship. (5) The BTHUA and the YRDUA each form three communities.

scholarly journals Study on the Impacts of Japanese Positive List System on the Chinese Frozen Vegetable Exportation

2017 ◽  
Vol 1 (1) ◽  
pp. 9
Author(s):  
Jian Chen ◽  
Min Xi ◽  
Ziye Zhou
Keyword(s):  
Comparative Analysis ◽  
Gravity Model ◽  
Agricultural Products ◽  
Trade Barriers ◽  
Positive List ◽  
The Usa ◽  
Trade Gravity Model

This paper mainly studies the Japanese policy, especially the Positive List System and Health Quarantine System, on the Chinese agricultural products exports, taking the frozen vegetable for example. The authors carry out studies on the related polices, consider the non-policy factors, making comparative analysis among the three countries: China, the USA and Thailand, utilizing trade gravity model. Finally the authors present suggestions to the breaking of the trade barriers.

scholarly journals How Do Population Flows Promote Urban–Rural Integration? Addressing Migrants’ Farmland Arrangement and Social Integration in China’s Urban Agglomeration Regions

Land ◽  
2022 ◽  
Vol 11 (1) ◽  
pp. 86
Author(s):  
Yanan Li ◽  
Chan Xiong ◽  
Yan Song
Keyword(s):  
Social Integration ◽  
Rural Areas ◽  
Positive Impact ◽  
Central City ◽  
Urban Agglomeration ◽  
Resource Flows ◽  
Urban Rural ◽  
Wuhan Urban Agglomeration ◽  
Urban And Rural Areas ◽  
High Degree

China’s urban–rural relationships have been changed dramatically by the intensifying population flows, especially in urban agglomeration regions. This study contributes to the interpretation of urban–rural integration mechanisms in urban agglomeration by constructing a conceptual framework of migration-related resource flows. Taking the Wuhan urban agglomeration as an example, migrants’ farmland arrangement, migration pattern, and social integration have been investigated to uncover the spatial and temporal characteristics of the urban–rural interaction, based on the data from the China Migrants Dynamic Survey in 2012–2017. The findings indicate that the farmland circulation in the Wuhan urban agglomeration was generally low, but slightly higher than that of the national average. The central city, Wuhan, had a high degree of family migration and social integration, indicating stronger resource flows in developed areas. However, its farmland circulation level was lower than that of non-central cities. The unsynchronized interaction of resources in urban and rural areas should be taken seriously, especially in areas with a relatively developed urban economy. The advantages of the central city in absorbing and settling migrants confirmed the positive impact of the urban agglomeration on promoting urban–rural integration.

B2C e-commerce logistics network optimization model

2022 ◽  
Vol 30 (3) ◽  
pp. 0-0
Keyword(s):  
Gravity Model ◽  
Network Structure ◽  
Network Optimization ◽  
Optimization Model ◽  
Operation Mode ◽  
Cost Optimization ◽  
Urban Agglomeration ◽  
Logistics Network ◽  
Definition Of ◽  
Full Investigation

In this paper, considering the characteristics of e-commerce logistics and the problems arising from the construction of logistics network, based on the full investigation and research of the B2C electricity supplier operation mode, we have studied and summarized the research results of scholars at home and abroad aiming at the related problems, and summarized and summarized the methods and steps of logistics network optimization in the whole country. First, we established the logistics network structure.The definition of network level, node function and connection between nodes is carried out. Then, through the improved urban agglomeration order gravity model, the scope of self logistics city is screened. Finally, the link of logistics network structure is scheduled for completion with the goal of cost optimization.

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