中文摘要：

通过城市间经济联系引力模型,构建洞庭湖城市群关联网络。运用复杂网络方法分别进行网络密度、度分布、网络中心度和凝聚子群等指标分析,分析网络拓扑特性,揭示城市群发展与复杂程度,并提出相应建议。结果表明：（1）城市群网络关联3个其他城市的城市占的比例较高,度分布大体上服从幂率分布,基本上为无标度网络;（2）通过比较无权网络与加权网络,网络的边权值与城市群网络拓扑特性影响更大,意味着边权值的加入更能真实地反映城市群经济凝聚力关系;（3）城市群整体的经济联系不强,处于一种弱联结状态,也反映出洞庭湖城市群发展正处于初级阶段。但具有明显的聚类效应,而且网络内的子群较多,存在7个基本子群;（4）岳阳市、常德市、益阳市等地级市在洞庭湖经济区空间经济联系网络中处于一种核心地位,具有很强的经济辐射能力。

英文摘要：

By using inter-city economic gravity model,urban agglomeration linkage networks of Dongting lake region is build.According to the point degree distribution,network centrality,network density,clustering coefficient and condensing subgroup index,this article describes topology characteristics of urban agglomeration linkage networks and the development complexity of urban agglomeration,and put forward the corresponding suggestions. The results show that ：（1）the maximum degree of urban agglomeration network is three,network degree distribution generally obey the power law distribution,urban agglomeration network basically a scale-free network.（2）By comparing network and weighted networks,the edge weights of weighted network has greater influence on urban agglomeration network topology characteristics and economic cohesion of urban agglomeration than un-weighted network.（3）Overall economic linkage of urban agglomerations is in a state of weak coupling, which reflects urban agglomerations development of Dongting lake region is in the primary stage. Clustering effect conform to ＂the rich get club＂ phenomenon,and there are seven basic subgroup inside network of urban agglomerations.（4）Yueyang city,Changde city and Yiyang city are at the core of network of urban agglomerations of Dongting lake region and has a strong ability of economic radiation.