AN ANALYSIS OF CONNECTIVITY LEVEL AND THE LOSS OF CUT-OFF POINT OF DOMESTIC AIR NETWORK IN CHINA

摘要

As an important traffic infrastructure;;the airport is of great significance for local business and residents. Airport is the air gateway;;the air network structured by node (Airport) and line (route) can be indicated the reachability between the city;;and reflected the social and economic connectivity between the cities. So the connectivity level of the air network determines the air transport services level. This paper analyze the domestic air network of China through using the methodology of social network analysis (SNA);;by calculating the indicators of density;;degree centrality;;closeness centrality and intermediary centrality with data of all domestic routes in 2011. The paper expands the study on the indicator of cut off point is studied;;by calculating the total loss of every deleted airport. Some result will be obtained that the connectivity level of domestic route network of China as a whole is relatively lower and the connectivity level between the eastern and western region is obviously different. There is also a characteristic network structure exiting in some particular regions of the west. In the meanwhile;;the result shows the whole network is highly relied on Beijing Capital Airport;;and invulnerability of network is weak. This study may be helpful in policy decisions for airports’ networks development;;pointed out development direction for different type of airports in China.