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Since the last decade the central government endeavors to promote large scale of urbanization in China. Lots of new urban towns and districts are taking shape. Outline of the 12th Five-year Plan released by the central government points out that the new towns and districts are to be regulated. But few researches are considering the new towns and districts especially in the spatial distributive pattern and status in China. Given this situation this paper, after sorting out the world-wide research and development of new urban towns and districts, gives definitions of broad and narrow meanings. Based on the broad meaning definition, the database of new towns and districts in China is established. This paper then conducts a preliminary analysis of the new towns and districts. Then the two-step work plan and the advices are also proposed to further improve the research and practice of its kind in China. 相似文献
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Mega-city region is the mainstream of global urban development and also the dominant model of the neo urbanization process in China. The Beijing-Tianjin-Hebei area, Yangtze River Delta area and Pearl River Delta area are China's three largest and most mature mega-city regions, the status of which represents the general level of the urban and regional development in China. Based on entire-array-polygon method, this paper makes a comprehensive evolution assessment of the three mega-city regions in terms of urban population index, urban economy index, urban life index, urban culture index and urban primacy index. In terms of general developing level, the three mega-city regions have progressed to optimize the structure. With their respective advantages and disadvantages, the three mega-city regions initially realize a "diversified" regional layout. The difference and gap among the three mega-city regions are obviously decreasing, which contributes to the regional balance of China metropolitan development. The rankings of the three mega-city regions will be in a continuous adjustment. The Beijing-Tianjin-Hebei area is possible to catch up and take the lead. 相似文献
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跨中长期下挠和梁体开裂是大跨径混凝土梁桥的常见病害,病害的存在与发展导致桥梁维修养护费用的大幅增加、破坏桥梁美观、严重影响交通和结构安全。采用体外预应力加固技术受力明确、安全,对抑制跨中下挠、控制裂缝,能起到明显的作用。在分析病害特点及成因基础上,通过对两座主跨超过200 m的刚构桥加固实践的总结,提出了针对性措施和体外预应力体系使用建议,供同行参考。 相似文献
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文化城市与中国城市发展方式转型及创新 总被引:1,自引:0,他引:1
刘士林 《上海交通大学学报(哲学社会科学版)》2010,18(3)
新中国的政治型城市化,在本质上是一种以政治理念和意识形态需要为中心、一切服从于国家政治需要与政治利益、带有浓郁"逆城市化"特点的城市化模式.经济型城市化是以GDP为中心、一切服从于发展经济生产力的城市发展模式,社会主义市场经济模式的确立、城市经济的改革开放、城市商业与服务功能的全面复兴以及城市建制与城市人口的迅速扩张,构成了经济型城市化进程的基本特征.以城市文化为核心的文化城市是最能体现人类文明发展高度的新型城市,是兼顾了传统与未来、最适合人居需求的科学与全面发展的城市模式. 相似文献
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