Study on the Mechanism and Structural System of Space Evolves and Urges in Urban Area

Concept intension of defining urban area , the urban area and urban area space structure, Think the system of the space structure of urban area is mainly e-volved including the mode , shape and function are evolved, Space structural mode evolve, appear single core polarise generally→One pair of cores is combined→What space course of nuclear network mode; Space structural shape evolve on the whole appearing and radiating the long corridor→Much axis is guided→Concen-tric circle layer→Make the evolution course of the shape up against the magnetic force centre; And because of the difference of stage of development of urban area, make the space structure derive out functions such as pointing out , organizing , optimizing and carriers ,etc., Think the environmental space of resource is restrained, technological progress support effect, key element gather - spread, upgrading of industrial structure , system and planning lead , urge urban area space main mechanism that structure evolves.