Metro Valley生态知识城,是一个由建筑师和项目开发人在共同的理想的支持下跨越文化的合作项目。不同于通常一堆分离的房子被道路组织在一起的园区规划方式,开放建筑设计了一个漂浮的地毯式巨型建筑,它像一个城市一样,或者说是两个垂直...Metro Valley生态知识城,是一个由建筑师和项目开发人在共同的理想的支持下跨越文化的合作项目。不同于通常一堆分离的房子被道路组织在一起的园区规划方式,开放建筑设计了一个漂浮的地毯式巨型建筑,它像一个城市一样,或者说是两个垂直叠加在一起的平行的城市,上面是出入有检查的免税城,下面是对所有人开放的自由城。平行的两个城市夹在双层自然中,即地面上最大限度保留下来的自然地貌和屋顶上人工创造出的自然。"开放建筑"将这个生态知识城构想成很多城市的叠加,如水平城市、绿色城市、智能城市和基础城市,它们共同构成复合的一个整体。Metro Valley生态知识城植根于文化,它的目标是未来。在摆脱无谓的形式游戏的同时,它希望承担起对社会和环境的充分负责。展开更多
This paper examines city growth patterns and the corresponding city size distribution evolution over long periods of time using a simple New Economic Geography(NEG) model and urban population data from Canada. The mai...This paper examines city growth patterns and the corresponding city size distribution evolution over long periods of time using a simple New Economic Geography(NEG) model and urban population data from Canada. The main findings are twofold. First, there is a transition from sequential to parallel growth of cities over long periods of time: city growth shows a sequential mode in the stage of rapid urbanization, i.e., the cities with the best development conditions will take the lead in growth, after which the cities with higher ranks will become the fastest-growing cities; in the late stage of urbanization, city growth converges according to Gibrat′s law, and exhibits a parallel growth pattern. Second, city size distribution is found to have persistent structural characteristics: the city system is self-organized into multiple discrete size groups; city growth shows club convergence characteristics, and the cities with similar development conditions eventually converge to a similar size. The results will not only enhance our understanding of urbanization process, but will also provide a timely and clear policy reference for promoting the healthy urbanization of developing countries.展开更多
Focusing on the economic development of its leather industry,Xinji City in the center ofHebei Province adheres to the scientific concept of development,strives to explore new ideas for industrialdevelopment,and makes ...Focusing on the economic development of its leather industry,Xinji City in the center ofHebei Province adheres to the scientific concept of development,strives to explore new ideas for industrialdevelopment,and makes tireless efforts to implement the GB/T19000 Quality Managementand Quality Assurance.This deepens the standardization of the leather industry and improves thelevel of enterprise management,serving both the economy and the enterprises.展开更多
基金Under the auspices of Key Program of Chinese Academy of Sciences(No.KZZD-EW-06-01)
文摘This paper examines city growth patterns and the corresponding city size distribution evolution over long periods of time using a simple New Economic Geography(NEG) model and urban population data from Canada. The main findings are twofold. First, there is a transition from sequential to parallel growth of cities over long periods of time: city growth shows a sequential mode in the stage of rapid urbanization, i.e., the cities with the best development conditions will take the lead in growth, after which the cities with higher ranks will become the fastest-growing cities; in the late stage of urbanization, city growth converges according to Gibrat′s law, and exhibits a parallel growth pattern. Second, city size distribution is found to have persistent structural characteristics: the city system is self-organized into multiple discrete size groups; city growth shows club convergence characteristics, and the cities with similar development conditions eventually converge to a similar size. The results will not only enhance our understanding of urbanization process, but will also provide a timely and clear policy reference for promoting the healthy urbanization of developing countries.
文摘Focusing on the economic development of its leather industry,Xinji City in the center ofHebei Province adheres to the scientific concept of development,strives to explore new ideas for industrialdevelopment,and makes tireless efforts to implement the GB/T19000 Quality Managementand Quality Assurance.This deepens the standardization of the leather industry and improves thelevel of enterprise management,serving both the economy and the enterprises.
