The Study On The Urban System Spatial Polarization Based On The Railway Passenger And Goods Flow In Northeast China

Through settling the correlative documents and using theories and methods of Economic Geography,Urban Geography, Regional Economics,Sociology and other correlative subjects, the paper analyses the urban system spatial polarization based on the railway passenger and goods flow in northeast China from theory and practice aspect. The paper deems that the cities and the region of Northeast China has changed shrewd,such as the phenomenon of megapolization is more and more obvious,the dominant status of Harbin,Changchun,Shenyang and Dalian in the urban system has enhanced than before,the relatively decline of the city of Jilin and Qiqihaer in Jilin and Heilongjiang Province has induced the regional structure of double cores not existing any more,Anshan and Benxi once were two important cities in Liaoning Province,but the economy increasing of Shenyang and Dalian has leaved them far behind,the basic structure of Northeast China has turned into"Four Cities Age".Furthermore,the regional structure of Northeast China also presents that the core of the region has strengthened more,in the meanwhile, the edge-city and small town has declined. The spatial differentiation of the amalgamation degree of urban and countryside has appeared.The process of spatial movement of city-region system and the future development modes of Northeast China both are unique from other areas.To measure the spatial polarization situation,degree and direction of the urban system of Northeast China, the paper has chosen Gini coefficient,Esteban-Ray index,Kanbur-Zhang index and five representative railway passenger and goods flow index to measure every aspects of urban system spatial polarization in northeast China.The paper concludes three parts:The first part elaborates the concept of spatial polarization, then introduces correlative theory and pattern, analyses urban system spatial structure in northeast China, finally summarizes regional spatial polarization research both in and abroad.The second part reviews the development history of railway transportation in China, analyses the actuality of railway transportation and the problem in railage, discusses the relationship between railway transportation and regional development as well as railway plays the important role in modern times in northeast China.The third part tells the research area, collects the data, explains the meaning of the index and shows the meaning and scale of the index, then analyses the urban system spatial polarization in northeast China from different aspects, including that measures the imbalance situation of the urban system in northeast China, makes use of polarization index analyses the extent and trend of the spatial polarization, analyses the changes in different classified direction simply explains the result, finally simply summarizes and explains the conclusion.The epilogue part gathers up each main part of the paper.