【摘 要】
：
With rapid urbanization process,the pace of urban sprawl has been quickened and most metropolises have experienced expansions in leaps and bounds in suburbaniza
【机 构】
：
Institute of Geographic Sciences and Natural Resources Research,Graduate University of the Chinese A
论文部分内容阅读
With rapid urbanization process,the pace of urban sprawl has been quickened and most metropolises have experienced expansions in leaps and bounds in suburbanization,which has greatly changed the urban and rural spatial structure of the metropolis fringe area.In this paper,Shuangliu County is taken as a ease,since it is a typical fringe area of Chengdu Metropolis.Based on Landsat TM images of Chengdu City and Shuangliu County obtained in 1985,2000 and 2004,characteristics of urban and rural spatial structure in Shuangliu County were analyzed,such as core-periphery spatiai structure and some obvious integration trends.Then the influencing factors for the formation of urban and rural spatial structure were identified,including some natural,social,economic and political factors.According to the discussion of this paper,Shuangliu County is undergoing a key transition and reform period.Its formation of urban and rural spatial structure was affected not only by such common factors as the location,natural baekgronnd,industrial transition,migration,etc.,but also by some unique factors such as city planning and policy guidance,which played an important role in accelerating its uneven spatial structure.The understanding of the role of the influencing factors would be useful for carrying out spatial management and development planning of metropolis fringe area.
其他文献
Background Metformin has become a cornerstone in the treatment of patients with type-2 diabetes. Accumulated evidence suggests that metformin supports direct ca
LiMn2O4-xFx prepared by the sol-gel method has a perfect crystal formation .The crystal particle size of the material was medium and distributed uniformly. The
Background Heterosexual sex has become the dominant transmission route in China. Recently studies reported high heterogeneity in heterosexual transmission risk
Active galactic nuclei (AGNs) have two major classes,namely radio loud AGNs and radio quiet AGNs.A small subset of the radio-loud AGNs is called blazars,which d
Background As a treatment of depression, the efficacy of conventional repetitive transcranial magnetic stimulation (rTMS) is limited, and symptoms recurrence is
Particles and natural organic matter (NOM) are two major concerns in surface water,which greatly influence the membrane filtration process.The objective of this
A highly selective ligand exchange type adsorbent was developed for the removal of trace arsenic(Ⅴ) (As(Ⅴ)) and phosphate from water.This adsorbent was prepar
Background The evidence for non-invasive positive pressure ventilation (NIPPV) used in patients with severe stable chronic obstructive pulmonary disease (COPD)
In this paper,we investigated the potential of Advanced Microwave Scanning Radiometer for Earth Observation System (AMSR-E) for flood monitoring.The proposed ap
With the development of vegetation indices,the reflection capability of vegetation indices to the state of vegetation has been improved in various degrees.Espec