Regional core cities are the growth poles for regional economic development, thus the issue about efficient urbanization pattern has always become a hot spot among researchers and policy makers. The Spatial Economy ca...Regional core cities are the growth poles for regional economic development, thus the issue about efficient urbanization pattern has always become a hot spot among researchers and policy makers. The Spatial Economy can be employed to improve it. Nevertheless, there actually exists an obvious gap between its theoretical models and the empirical simulation. To do so, this paper modifies the measurement of initial geographical advantages Stelder gave, and implements the empirical analyses of urban distribution in Zhejiang during the period of 1980-1990 by means of computer simulations in GIS environment. There are several interesting results achieved in this process. Firstly, given the values of parameters （transport cost is r, substitution elasticity of manufacturing sector p, and income share of spending on manufacture δ）, initial geographical advantages have the different impacts on urban systems, namely, urban locations, numbers and sizes over time across space. Secondly, the cities were distributed without any overlay in geographical space, which makes the patterns of urbanization generate the largest possible economic efficiencies. Thirdly, the urban systems-the location, number and size of Cities-from the simulation of the study area are suitable for the actual social and economic situations in the real world during the testing periods. Such results may have substantial implications for the policy how to choose the way of urbanization in a region.展开更多
Urban green spaces have been arisen growing concern responded to the social and environmental costs of urban sprawl. A wide range of planning and policies has been and/or will be designed to protect urban green spaces...Urban green spaces have been arisen growing concern responded to the social and environmental costs of urban sprawl. A wide range of planning and policies has been and/or will be designed to protect urban green spaces and optimize their spatial pattern. A better design or planning of urban green space can make a major contribution to quality of environment and urban life, and furthermore can decide whether we can have a sustainable development in the urban area. Information about the status quo of urban green spaces can help planners design more effectively. However, how to quantify and capture such information will be the essential question we face. In this paper, to quantify the urban green space, a new method comprising gradient analysis, landscape metrics and GIS was developed through a case of Jinan City. The results demonstrate: 1) the gradient analysis is a valid and reliable instrument to quantify the urban green space spatial pattern precisely; 2) using moving window, explicit landscape metrics were spatially realized. Compared with quantifying metrics in the entire landscape, it would be better to link pattern with process and establish an important basis for analyzing the ecological and socioeconomic functions of green spaces.展开更多
本文基于地理信息空间分析和数理统计法,以北京市南部某区为研究对象,依托研究区内供水、中水、降水、污水、燃气、热力、电力、通信和广播电视9类地下管线数据,分析了地下管线数据的空间规划设计特征。研究发现:①根据Pearson相关系数...本文基于地理信息空间分析和数理统计法,以北京市南部某区为研究对象,依托研究区内供水、中水、降水、污水、燃气、热力、电力、通信和广播电视9类地下管线数据,分析了地下管线数据的空间规划设计特征。研究发现:①根据Pearson相关系数,该区各专业地下管线呈“南疏北密,由城区中心向外辐射”的空间分布特征;②由全局和局部Moran s I和Getis-Ord Gi*指数可知,该区管线在空间上形成了西北-东南向“一高一低”两个集聚区和一个显著分散趋势,且冷热点分布与空间集聚模式基本相同,具有空间依赖关系;③城区内各街道的管线覆盖率明显高于南部乡镇,呈显著两极分化。本文可为该区地下管线管理与规划提供重要的空间分析依据和实证数据支持,为提升地下空间的可持续利用、保障地下空间高质量发展、优化基础设施布局提供参考和指导。展开更多
基金Under the auspices of Chinese Academy of Philosophy and Social Science (No. 04BJL052), Ministry of Construction of China (No. 06-R1-8)
文摘Regional core cities are the growth poles for regional economic development, thus the issue about efficient urbanization pattern has always become a hot spot among researchers and policy makers. The Spatial Economy can be employed to improve it. Nevertheless, there actually exists an obvious gap between its theoretical models and the empirical simulation. To do so, this paper modifies the measurement of initial geographical advantages Stelder gave, and implements the empirical analyses of urban distribution in Zhejiang during the period of 1980-1990 by means of computer simulations in GIS environment. There are several interesting results achieved in this process. Firstly, given the values of parameters （transport cost is r, substitution elasticity of manufacturing sector p, and income share of spending on manufacture δ）, initial geographical advantages have the different impacts on urban systems, namely, urban locations, numbers and sizes over time across space. Secondly, the cities were distributed without any overlay in geographical space, which makes the patterns of urbanization generate the largest possible economic efficiencies. Thirdly, the urban systems-the location, number and size of Cities-from the simulation of the study area are suitable for the actual social and economic situations in the real world during the testing periods. Such results may have substantial implications for the policy how to choose the way of urbanization in a region.
文摘Urban green spaces have been arisen growing concern responded to the social and environmental costs of urban sprawl. A wide range of planning and policies has been and/or will be designed to protect urban green spaces and optimize their spatial pattern. A better design or planning of urban green space can make a major contribution to quality of environment and urban life, and furthermore can decide whether we can have a sustainable development in the urban area. Information about the status quo of urban green spaces can help planners design more effectively. However, how to quantify and capture such information will be the essential question we face. In this paper, to quantify the urban green space, a new method comprising gradient analysis, landscape metrics and GIS was developed through a case of Jinan City. The results demonstrate: 1) the gradient analysis is a valid and reliable instrument to quantify the urban green space spatial pattern precisely; 2) using moving window, explicit landscape metrics were spatially realized. Compared with quantifying metrics in the entire landscape, it would be better to link pattern with process and establish an important basis for analyzing the ecological and socioeconomic functions of green spaces.
文摘本文基于地理信息空间分析和数理统计法,以北京市南部某区为研究对象,依托研究区内供水、中水、降水、污水、燃气、热力、电力、通信和广播电视9类地下管线数据,分析了地下管线数据的空间规划设计特征。研究发现:①根据Pearson相关系数,该区各专业地下管线呈“南疏北密,由城区中心向外辐射”的空间分布特征;②由全局和局部Moran s I和Getis-Ord Gi*指数可知,该区管线在空间上形成了西北-东南向“一高一低”两个集聚区和一个显著分散趋势,且冷热点分布与空间集聚模式基本相同,具有空间依赖关系;③城区内各街道的管线覆盖率明显高于南部乡镇,呈显著两极分化。本文可为该区地下管线管理与规划提供重要的空间分析依据和实证数据支持,为提升地下空间的可持续利用、保障地下空间高质量发展、优化基础设施布局提供参考和指导。
