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21.
Since 1978, within social geographic pattern of Chinese metropolis, differentiation not only has come to be in social entity,
but also by some degree embodied within residential space. Through the study on spatial segregation, the authors implicate
these above spatial differentiation from social polarization to residential segregation cause by change in the political economy,
in the organization of urban and real estate development (from project-specific to comprehensive development and real estate
development) and in the functions and value of urban planning (from a sectional-subordinated to a municipally based control).
The imprints of transition on social space are illustrated eight references to the example of Nanjing metropolis. Among the
new phenomenal identified here are the six types of residential area according to soci-economic status.
Foundation item: Supported by the National Natural Science Foundation of China (No. 59838280) and the Resource and Ecological
Environment Key Project of the Chinese Academy of Sciences. (KZ952-J1-206).
Biography: ZHU Xi-gang(1956–), male, a native of Taicang City of Jiangsu Province, is a Ph. D. student of Nanjing University
and associate professor. His research interests include urban planning, urban spatial structure, economic development, architectural
desine etc. 相似文献
22.
Minxue He Terri S. Hogue Kristie J. FranzSteven A. Margulis Jasper A. Vrugt 《Advances in water resources》2011,34(1):114-127
The National Weather Service (NWS) uses the SNOW17 model to forecast snow accumulation and ablation processes in snow-dominated watersheds nationwide. Successful application of the SNOW17 relies heavily on site-specific estimation of model parameters. The current study undertakes a comprehensive sensitivity and uncertainty analysis of SNOW17 model parameters using forcing and snow water equivalent (SWE) data from 12 sites with differing meteorological and geographic characteristics. The Generalized Sensitivity Analysis and the recently developed Differential Evolution Adaptive Metropolis (DREAM) algorithm are utilized to explore the parameter space and assess model parametric and predictive uncertainty. Results indicate that SNOW17 parameter sensitivity and uncertainty generally varies between sites. Of the six hydroclimatic characteristics studied, only air temperature shows strong correlation with the sensitivity and uncertainty ranges of two parameters, while precipitation is highly correlated with the uncertainty of one parameter. Posterior marginal distributions of two parameters are also shown to be site-dependent in terms of distribution type. The SNOW17 prediction ensembles generated by the DREAM-derived posterior parameter sets contain most of the observed SWE. The proposed uncertainty analysis provides posterior parameter information on parameter uncertainty and distribution types that can serve as a foundation for a data assimilation framework for hydrologic models. 相似文献
23.
北京城市周边度假地空间结构演变分析 总被引：1，自引：0，他引：1
改革开放以后,中国城市旅游地空间结构发生了深刻的变化。选取北京市五环外421个度假地为研究样本,采用地理信息系统Arcview中的kernel密度分析方法对度假地的空间结构演变进行分析。发现：点-轴、核心-边缘两种空间发展模式共同影响着北京周边度假地的空间形态,其中集聚是度假地空间结构演变过程中的主要发展形式：度假地围绕自然资源优良地集聚分布,空间形态上形成了四大度假聚集地、三个圈层;四个度假聚集地表现出雏形-发育-成熟-拓展的空间演变形式。 相似文献
24.
城市化是当今时代社会经济发展的主旋律与经济发展实现现代化的主要目标之一。在经济发达地区,工业化水平高、城镇密集、交通发达、土地利用空间高度集约化,也是沿海地区城市化的重要特点。然而,每个城市的用地空间在城市化过程中存在着非理性的扩展现象,甚至有些大城市地区用地失控的现象;使之城市边缘地区过度郊区化,无限制的蔓延扩展,开发区泛滥,造成生态环境恶化,非理性化的城市建设成本不断增加,社会与环境治理成本也不断加大。提出在经济发达地区内,大都市用地空间理性扩展的5个原则与5种解决的办法,在中国土地资源十分有限的国情条件下,大都市建设做到用地空间理性扩展以及城市化健康发展将起到重要的指导作用,具有十分重要的实践意义与学术价值。 相似文献
25.
Issaka Kanton Osumanu 《GeoJournal》2007,68(4):343-355
The Tamale Metropolitan Area (TMA), as a low-income city in a heavily indebted poor country, is at the first stage of the
urban environmental transition where most of the environmental problems tend to occur close to the home. Some of the more
severe household environmental problems are poor housing, inadequate potable water supply, unsanitary conditions, uncollected
garbage, indoor air pollution and pest infestation. Those usually exposed to these environmental burdens are the less wealthy
households who have benefited less from development planning and infrastructure provision. Using questionnaire survey and
focus group discussions, this study explored the environmental anxieties of households in the metropolis. A stratified sample
of residential areas of the city was employed, and the study is able to examine city-wide disparities. The results indicate
that problems of water supply are the concern of all groups. Sanitation and garbage disposal services are problems faced mainly
by the poor in low-income areas. Other problems faced by the poor are overcrowding, indoor air pollution and pest infestation,
but these problems are not highlighted by the poor reflecting a misplaced lack of concern for these problem areas and ignorance
of the health risks posed by these hazards. The finding suggests a considerable demand for improvements in environmental service
provision and a general willingness to pay for such improvements.
相似文献
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