The Urban Network Connection of Three Provinces in Northeast China Based on Baidu Index
利用百度指数分析东北三省34个城市间的网络联系，发现省内联系紧密但省际联系较弱，行政边界影响显著，沈阳、长春、哈尔滨分别为各省主导城市。
The network connection structure between cities is analysed attemptedly with Baidu Index which urban people use in the network for search. The Baidu Index between 34 cities in three provinces in Northeast China is gotten from http://index.baidu.com. We try to study the urban network connection in three provinces by Net Draw, Dominant flow and CValue、D-Value hierarchy analysis. After comprehensive analysis,the conclusion is the following aspects.(1)The dominant city lacks in the network for Northeast and the network connection between cities of three provinces isn't close. However the network connection is very close in every province and the hierarchy network structure is obvious in Liaoning province,Jilin province and Heilongjiang province. Administrative division has an important effect on the network connection hierarchy.(2)The network connection between cities in Liaoning province is hierarchy structure.In this network Shenyang is dominant city,Dalian is second dominant city,the others are subordinate cities. In the network of Jilin province,Changchun is dominant city, Jilin is second dominant city, the others are subordinate cities. In the network of Heilongjiang province,Harbin is dominant city, none is second dominant city, the others are subordinate cities.