鍏抽敭璇�: 閾佽矾瀹㈣繍鎻愰��, 閾佽矾浜ら�氱綉缁�, 鍙揪鎬�, 寮曞姏妯″瀷, 缁忔祹鑱旂郴

Abstract: Based on the railway passenger transportation network,employing the index of shortest time distance matrix between every two provincial capital cities which are Abstracted nodes in the railway network in 2003 and 2008,the paper analyses the level and spatial pattern of accessibility throughout the country.And then,the distance parameter in the gravity model is modified by the shortest travel time indicator,the strength of interprovincial economic linkage are measured and the spatial orientation are examined on the assumption that the provincial capital cities are the economic barycentre of the whole province.Results are shown as follows.(1) The inter-provincial accessibility level has gained a significant upgrade,especially accessibility promotion in the western provinces is higher than that of the others through the 5th and 6th train-speed network upgradings.But,the disparity of inter-provincial accessibility level is still remarkable throughout the country.The circle-type spatial pattern of the accessibility level that reduces gradually from the eastern coastal provinces to the northwestern provinces has emerged,the scope of the accessibility central zone is expanding,and the primary railway lines are becoming stronger and stronger.(2) The disparity of quantity of economic linkage is remarkable,the quantity of economic linkage in east coastal provinces is much higher than that of the central and western provinces.(3) The predominant axes of inter-provincial economic linkage have formed along the main railway lines from Beijing to Shanghai and from Beijing to Guangzhou.The spatial network pattern of regional economic linkage is forming along with the train-speed upgrading and the promotion of regional economy.The research of inter-provincial accessibility and economic linkage can not only give suggestions to regional economic restructuring,and to the primary spatial orientation of regional economic development,but also provide reference for coordinating inter-provincial economic linkage and cooperation in the process of regional economic integration.

Key words: railway passenger train-speed upgrading, railway network, accessibility, gravity model, regional economic linkage