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《Economic Geography》 2013-07
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The Research of the Yangtze River Delta Core Area’s City Network Characteristics Based on Baidu Index

XIONG Li-fang1,ZHEN Feng2,3,WANG Bo2,XI Guang-liang1(1.School of Geographic and Oceanographic Sciences,Nanjing University,Nanjing 210093,Jiangsu,China;2.School of Architecture and Urban Planning,Nanjing University,Nanjing 210093,Jiangsu,China;3.Human Geography Research Center,Nanjing University,Nanjing 210093,Jiangsu,China)  
Influenced by globalization and information,city network is a new direction of city and regional studies in recent ten years.Based on the"Degree of Consumer Attention"function provided by Baidu.com,the attention datas of year 2009 and 2012 between cities of the Yangtze River Delta core area were gotten,in order to simulate the information flow and study the city network evolution.Comparative study found that:(1)The city network hierarchy changed greatly,but Shanghai was still the absolute core;(2)The city network structure optimized gradually: it developed from the"Z" type with the supporting nodes of Nanjing,Shanghai,Hangzhou and Ningbo,into the"8"type with adding Yangzhou and Nantong,more and more cities have become the important nodes;(3)The city network internal stability increased: each city’s gross of information contact increased,but the interannual variation reduced.Further research indicated that,the regional city network spatio-temporal evolution based on Baidu Index were influenced by the economic development foundation,the city function positioning,the city events effect as well as the city network marketing.
【Fund】: 国家自然科学基金项目(40971094)
【CateGory Index】: F299.2;F224
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