中文摘要：

基于空间作用强度、方向与范围的三维视角,运用经济联系强度的引力模式、城市流强度及断裂点理论等方法,对淮海经济区主要城市经济联系的空间作用进行综合分析评价。结果表明：淮海经济区20个地级市在空间作用强度、作用方向、作用范围等方面都存在较大差异,但无论从哪个方面来看,徐州无疑是淮海经济区的首要经济发展核心和辐射中心。在作用强度上,徐州的经济联系强度和城市流强度稳居第一位,成为该区的首要经济发展核心;在作用方向上,该区主要城市的空间作用均表现为明显的中心城市指向性和相邻地域指向性;在作用范围上,主要城市的空间作用范围不一,空间层次明显,徐州成为该区辐射中心,且呈圈层状对其他城市进行辐射。对于空间作用处于不同层次的城市,在未来的发展中应加以分类引导,提高城市综合实力,加强经济区内城市联系,全面提升城市竞争力,促进淮海经济区的全面发展。

英文摘要：

In this paper, the approaches of the gravity model of economic linkage intensity, the urban flow, as well as the theory of breaking point are used to analyze the spatial effect of economic linkage in Huaihai Economic Area. The result shows that the 20 cities in Huaihai Economic Area have great differences in economic linkage intensity, effect direction and radiation, but there is no doubt that Xuzhou, no matter what perspective, is the primary development core and radiant center. From a view of the effect intensity, the economic linkage intensity and the urban flow intensity of Xuzhou rank the first place and Xuzhou is becoming the leading economic development core in Huaihai Economic Area. On the other hand, the effect direction shows that the spatial interaction between every two cities is characterized by the obvious city pointing and adjacent cities pointing. In terms of the effect range, the spatial effect ranges of the major cities are various, and the spatial levels are significant. Xuzhou, the radiation center, presents a more obvious ＂center-periphery＂ model to radiate other cities in shape of sphere. For the cities whose economic linkages are at different levels, guiding classifiably, enhancing its overall development, strengthening the urban linkage between cities of the area and reinforcing the urban competitiveness, are the approaches to promote Huaihai Economic Area＇ s comprehensive development in future.