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中文摘要：
基于城市流强度模型和城市间相互作用模型,以长江中游城市群27个地级市为研究对象,分析了城市群内的城市辐射能力及其内在的经济联系。结果表明：（1）长江中游城市群整体集聚和辐射能力较弱,区域内中低级城市流强度的城市占多数;（2）城市群内第二、三产业辐射能力存在较大差异,第二产业呈现出较强的辐射能力,而第三产业辐射能力较弱,并且其空间分布相对较为分散;（3）区域中心城市的核心带动作用总体较弱,辐射范围和辐射强度都有待加强;（4）长江中游城市群内城市间空间联系不够紧密,且联系程度空间差异较大。省际城市之间联系贫乏,城市间尚未形成联系紧密的辐射网络。
英文摘要：
Based on the model of the intensity of urban flow and the association intensity among cities, we measured and analyzed the radiation and inherent economic relations of 27 prefecture-level cities in the middle reaches of the Yangtze urban agglomeration. The results showed：（1） The total concentration and radiation in the middle reaches of the Yangtze urban agglomeration was weak, and cities whose intensity at middle and low level accounted for the majority in the region;（2） The difference was big on the radiation between secondary industry and tertiary industry, the radiation of secondary industry in cities was strong while the radiation of tertiary industry was weak, whose spatial distribution was scattered;（3）the core role in driving regional center city was not strong enough, which needs to be further strengthened;（4） The economic links among cities in the middle reaches of the Yangtze urban agglomeration was not quite close, The difference is big on the spatial distribution of the relation degree and the contact among cities of province was poor, closely linked radiation network among cities has not formed in the middle reaches of the Yangtze urban agglomeration.
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