科学分析城市建设用地扩张的时空特征有助于实现城市的可持续发展,为了更全面地探索建设用地的发展规律以及建设用地扩张与道路发展相关性的分布特点,以福州市土地利用/覆盖变化数据和开源地图(open street map, OSM)路网数据为基础,利...科学分析城市建设用地扩张的时空特征有助于实现城市的可持续发展,为了更全面地探索建设用地的发展规律以及建设用地扩张与道路发展相关性的分布特点,以福州市土地利用/覆盖变化数据和开源地图(open street map, OSM)路网数据为基础,利用多环缓冲区、等角扇形、经纬网络划分研究单元,计算建设用地整体和局部的分形纬数、紧凑度、密度、扩张强度、扩张速度等扩张指数以及道路线密度、道路加权核密度,利用相关分析和双变量空间自相关分析,探讨2000—2020年福州市建设用地扩张的时空规律及其与道路网络分布的空间相关性。结果表明:福州市建设用地面积的增长速度呈现先升高后回落的趋势,扩张的主要区域为距市中心3~17 km区域且具有向外扩张的趋势;东南方向扩张强度最大,东北和西南部扩张速度较快,西部、北部扩张强度与扩张速度均较低;2015、2020年建设用地与道路网络的分布呈显著的空间相关性,全局莫兰指数(Moran’I)分别为0.829和0.835,高-高聚类集中在城市中心,低-低聚类集中在城市西部以及边缘地区,市中心以及东南沿海地区为建设用地与道路网络发展的主要地区,且二者发展较为协调。展开更多
From the viewpoint of Graph Theory this paper builds a town road network graph of regional scale, and proposes numerical vertex degree （Di）, rank vertex degree （Dr） and population size vertex degree （Dp） on the ...From the viewpoint of Graph Theory this paper builds a town road network graph of regional scale, and proposes numerical vertex degree （Di）, rank vertex degree （Dr） and population size vertex degree （Dp） on the base of vertex degree （D）. Then the indicators of Di, Dr, Op and mathematical statistics methods are applied to investigating scale-free structure of town road networks in the southern Jiangsu Province. The results show that the distribution of Oi does not exhibit scale-free properties, but Dr and Dp do. Additionally the correlation coefficient between Dp and Di is only 0.569, but the spatial correlation between Dp and Dr is very evident on the base of correlation analysis and spatial analysis of GIS. The mutual mechanism between Dp and Dr spatially represents a ＂Core-Belt＂ model of town development of regional scale. The town development model is open and clustered, and beneficial to both economic development and ecological protection. And then we suggest that Suzhou City, Wuxi City, Changzhou City and Wujin City control towns＇ high-density pattern by conducting centralization and consolidation policies, and properly controlling and planning higher rank roads; whereas Nanjing City, Zhenjiang City, Jintan City and Liyang City must strengthen the development of towns along higher rank roads.展开更多
Urban agglomeration of the Yangtze Delta （UAYD）, one of the most developed regions of China, has witnessed an increasing prevalence in building ecological cities when the ecological cities are pursued by many modem ...Urban agglomeration of the Yangtze Delta （UAYD）, one of the most developed regions of China, has witnessed an increasing prevalence in building ecological cities when the ecological cities are pursued by many modem cities, and great achievements have been made in this regard. It is inevitable, however, that certain problems exist during the construction of ecological city, which include but not limited to non-harmonious development of urban complex ecosystem, and the difficulty in quantifying eco-city construction or incomplete quantification in assessing the construction of present and future eco-city. Based on the analysis on social-economic conditions and regional conditions of the UAYD, this paper attempts to set up an index system of eco-cities combining with local characteristics, and to adopt the indices of eco-city, urban harmony, and eco-city colligate to evaluate the ecological level, urban harmonious development and eco-city construction of cities within the UAYD. Results indicate that among 15 cities in UAYD, Suzhou City ranks the highest in terms of eco-city construction, whereas Nantong ranks relatively lower; sustainable eco-city construction is possible only when cities are developed in every respect of harmony.展开更多
Bangladesh economy has experienced some stable growths with regard to major macroeconomic indicators, significant progress in social development indicators, rural infrastructure, investment in industrial agricultural ...Bangladesh economy has experienced some stable growths with regard to major macroeconomic indicators, significant progress in social development indicators, rural infrastructure, investment in industrial agricultural sector, and poverty alleviation since the 1990s. Bangladesh has made major strides in its human development index （HDI）, population growth rate achieved to 1.3%, gross domestic product （GDP） over the last five years achieved more than 5% growth consecutively; as a result, it mooted the Brazil, Russia, India, China （BRIC） successors, otherwise known as the Next-11. The success has come through the miracle activities of micro finance （MF： Grameen Bank and non-governmental organizations （NGOs））, remittance from migrant worker （RMW）, and export of readymade garment （ERMG） products. These three （MF, RMW, and ERMG） as the ＂prime powers＂ or engines have been achieving to ＂bottom up＂ of social economic development. This paper reviews aspects of economic development in Bangladesh, analyzes three prime powers, and tries to find out a development pattern, vis-a-vis construct Bangladesh economic development model or BED model. Finally, this paper examines Bangladesh＇s development experience in light of the BED model. It has recognized MF model for poverty alleviation in the worldwide.展开更多
文摘科学分析城市建设用地扩张的时空特征有助于实现城市的可持续发展,为了更全面地探索建设用地的发展规律以及建设用地扩张与道路发展相关性的分布特点,以福州市土地利用/覆盖变化数据和开源地图(open street map, OSM)路网数据为基础,利用多环缓冲区、等角扇形、经纬网络划分研究单元,计算建设用地整体和局部的分形纬数、紧凑度、密度、扩张强度、扩张速度等扩张指数以及道路线密度、道路加权核密度,利用相关分析和双变量空间自相关分析,探讨2000—2020年福州市建设用地扩张的时空规律及其与道路网络分布的空间相关性。结果表明:福州市建设用地面积的增长速度呈现先升高后回落的趋势,扩张的主要区域为距市中心3~17 km区域且具有向外扩张的趋势;东南方向扩张强度最大,东北和西南部扩张速度较快,西部、北部扩张强度与扩张速度均较低;2015、2020年建设用地与道路网络的分布呈显著的空间相关性,全局莫兰指数(Moran’I)分别为0.829和0.835,高-高聚类集中在城市中心,低-低聚类集中在城市西部以及边缘地区,市中心以及东南沿海地区为建设用地与道路网络发展的主要地区,且二者发展较为协调。
基金Under the auspices of National Natural Science Foundation of China (No. 40435013, No. 40535026)
文摘From the viewpoint of Graph Theory this paper builds a town road network graph of regional scale, and proposes numerical vertex degree （Di）, rank vertex degree （Dr） and population size vertex degree （Dp） on the base of vertex degree （D）. Then the indicators of Di, Dr, Op and mathematical statistics methods are applied to investigating scale-free structure of town road networks in the southern Jiangsu Province. The results show that the distribution of Oi does not exhibit scale-free properties, but Dr and Dp do. Additionally the correlation coefficient between Dp and Di is only 0.569, but the spatial correlation between Dp and Dr is very evident on the base of correlation analysis and spatial analysis of GIS. The mutual mechanism between Dp and Dr spatially represents a ＂Core-Belt＂ model of town development of regional scale. The town development model is open and clustered, and beneficial to both economic development and ecological protection. And then we suggest that Suzhou City, Wuxi City, Changzhou City and Wujin City control towns＇ high-density pattern by conducting centralization and consolidation policies, and properly controlling and planning higher rank roads; whereas Nanjing City, Zhenjiang City, Jintan City and Liyang City must strengthen the development of towns along higher rank roads.
文摘Urban agglomeration of the Yangtze Delta （UAYD）, one of the most developed regions of China, has witnessed an increasing prevalence in building ecological cities when the ecological cities are pursued by many modem cities, and great achievements have been made in this regard. It is inevitable, however, that certain problems exist during the construction of ecological city, which include but not limited to non-harmonious development of urban complex ecosystem, and the difficulty in quantifying eco-city construction or incomplete quantification in assessing the construction of present and future eco-city. Based on the analysis on social-economic conditions and regional conditions of the UAYD, this paper attempts to set up an index system of eco-cities combining with local characteristics, and to adopt the indices of eco-city, urban harmony, and eco-city colligate to evaluate the ecological level, urban harmonious development and eco-city construction of cities within the UAYD. Results indicate that among 15 cities in UAYD, Suzhou City ranks the highest in terms of eco-city construction, whereas Nantong ranks relatively lower; sustainable eco-city construction is possible only when cities are developed in every respect of harmony.
文摘Bangladesh economy has experienced some stable growths with regard to major macroeconomic indicators, significant progress in social development indicators, rural infrastructure, investment in industrial agricultural sector, and poverty alleviation since the 1990s. Bangladesh has made major strides in its human development index （HDI）, population growth rate achieved to 1.3%, gross domestic product （GDP） over the last five years achieved more than 5% growth consecutively; as a result, it mooted the Brazil, Russia, India, China （BRIC） successors, otherwise known as the Next-11. The success has come through the miracle activities of micro finance （MF： Grameen Bank and non-governmental organizations （NGOs））, remittance from migrant worker （RMW）, and export of readymade garment （ERMG） products. These three （MF, RMW, and ERMG） as the ＂prime powers＂ or engines have been achieving to ＂bottom up＂ of social economic development. This paper reviews aspects of economic development in Bangladesh, analyzes three prime powers, and tries to find out a development pattern, vis-a-vis construct Bangladesh economic development model or BED model. Finally, this paper examines Bangladesh＇s development experience in light of the BED model. It has recognized MF model for poverty alleviation in the worldwide.
