“多中心、网络化”作为城市群经济发展的必然趋势，正在成为京津冀城市群发展的强大动力，并将推动其成为继长三角、珠三角之后的我国经济增长“第三极”。借助引力模型和社会网络分析方法，以京津冀城市群13个构成城市间的经济联系网络为研究对象，进行实证研究。结果表明：5年间，京津冀城市群整体网络密度显著提高，城市间经济联系频繁而密切；北京与天津、唐山等次中心城市交流与合作加强，京津冀多中心发展格局初具雏形；石家庄依托其省会城市的优势，在城市群中发挥着越来越重要的作用；城市群内部其他城市间经济联系广度和深度不断增强。%As an inevitable trend of the urban agglomeration economic development,“Multi center,network”, which is becoming a powerful engine for the development of Jing-Jin-Ji urban agglomeration ,will promote Jing-Jin-Ji urban agglomeration to become the“third pole”of China’s economic growth,going after the Yangtze River Delta and the Pearl River Delta. Using the gravity model and social network analysis method ,we maked an empirical analysis and research on economic contact network of 13 cities,which are the constitution of Jing-Jin-Ji urban agglomeration. The result showed that in last five years,the whole network density of Jing-Jin-Ji urban agglomeration increased obviously,and the economic contact among cities was more frequent. The communication and cooperation between Beijing and secondary central cities,such as Tianjin,Tangshan etc. were strengthened, which indicated that the“Multi center”pattern of Jing-Jin-Ji urban agglomeration began to take shape. Shijiazhuang played an increasingly important role in urban agglomeration,relying on its advantages of provincial capital city. The economic contact in greater scope and depth among other cities in urban agglomeration has been increasing.
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