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1.

The legal city and the urbanized area fail to depict accurately the physical area of urban development and therefore prevent an accurate calculation of population densities. When underbounding occurs, densities tend to be unrealistically high and with overbounding they are low. Delimitations made by air photo interpretation demonstrate that the physical city, measured on a 21/2 acre scale of generalization, provides a more accurate basis for calculating population densities of urban areas than either the legal city or urbanized area because the bounding problems are eliminated.  相似文献   

2.
TOWARD ESTABLISHING THE CONCEPT OF PHYSICAL URBAN AREA IN CHINA   总被引:1,自引:0,他引:1  
I.IntroduchollWiulegeOgraphystudiestheterritoria1systemsabouttherelationsbforeenhumanbeingSandthenature[I4],urbanmpaphyfocusesspecificallyonthespatialoopltizationandprocessofurbanterritory,anditsinteraCtionwiti1Otherterritorialsystems.Usually,wedoresearch…  相似文献   

3.
对Repast以及由RepastS构建仿真模型的基本流程作了简单介绍,并以昆明市主城区为例,以RepastS松散集成GIS,构建了一个反映城市人口空间分布的仿真模型。模型首先将昆明市主城区的324万总人口分为3240个Agent,选取对人口空间分布影响较大的交通、经济、行政驻地、企事业单位、水体、坡度六类因素作为影响因子,运用主成份分析功能以及专家打分的方式对各影响因子分别赋予对人口空间分布的影响权重以及自身的影响度值,建立影响Agent随机移动以及停留的函数模型。模型根据Agent最终停留的坐标自动计算落在每一个行政区内的Agent个数。将模拟结果与昆明市主城区实际人口分布数据进行对比,结果表明模型的仿真度较高,证明模型的构建是成功的。  相似文献   

4.
建立中国城市的实体地域概念   总被引:91,自引:2,他引:91  
周一星  史育龙 《地理学报》1995,50(4):289-301
本文总结了我国在城市的行政地域与景观地域严重背离的情况下,继续使用行政地域区分城乡的种种弊端,认为解决这一问题于关键在于建立适合中国特点又具有国际可比性的城市实体地域概念,以此作为城乡划分及统计的地域基础,文章提出以下限人口规模、非农化水平和人口密度三个指标定义城市实体地域,并在大量实证研究的基础上,通过对中国城市空间形态的分类,提出了一套完整的划分实体地域的方法和工作程序。  相似文献   

5.
论建设生态城市的立足点   总被引:3,自引:0,他引:3  
从生态城市的内涵、结构组成、功能及特点等生态城市有关的基本理论分析入手,探讨建设生态城市的理论依据.在分析中国建设生态城市所面临的问题和现状的基础上提出中国建设生态城市的基本立足点,可以概括为:(1)以城乡共同发展为准则;(2)以加大科研投入,提高教育水平,提高人口素质为先导;(3)以生态修复为基础;(4)以发展循环的经济为核心;(5)以加强环境立法,提高环境管理效率为手段.  相似文献   

6.
广州市未来居住区热点区位分析   总被引:2,自引:1,他引:2  
薛德升  李郇 《热带地理》1995,15(1):56-61
本文在回顾建国以来广州市居住区建设状况的基础上,对广州市居民3个层次的居住环境现状进行了评价,分析了居民未来居住环境需求的变化对其住宅区位选择的影响,讨论广州市目前已经出现及将会出现的重要的城市社会发展趋势和城市建设趋势,以及它们对城市居住区区位的影响,指出了广州市未来居住区开发的热点区位及其开发过程中所要重点解决的几个问题。  相似文献   

7.
In this article I examine Moscow's role in the political‐economic space of the Russian Federation. A broad range of data supports the thesis that the capital has become a primate city, one that serves no longer as the command center of a closed system but as the primary node of interconnection between Russia and the rest of the world. The effort to create a larger, polycentric “New Moscow” next to the ancient capital is marked by a tightening of central control, in contrast to governance regimes of European megaregions. Nevertheless, expansion of the capital region very likely will further boost Moscow's dominance over the country.  相似文献   

8.
杨积武 《地理学报》1994,49(5):477-480
“大水冲刷,小水淤积”是冲积性河流普遍存在的理象。如何确定大小水的界限,也就是分界流量的大小,参考文献[1]曾利用水沙关系式联立的方式进行求解,本文就此方法的可行性作一讨论。  相似文献   

9.
楼兰古城的兴衰及其与环境变化的关系   总被引:4,自引:2,他引:4  
楼兰古城是古丝绸之路上位于中亚的重要通道站,但后因历史上气候周期变化及平原湖泊河口三角洲淤各使河流自然道的地理原因,在公元前开始至3世纪进入楼兰的河水逐渐减少,最终主河道变迁而使楼兰城南北河干涸,环境迅速恶化,导致楼兰消亡。  相似文献   

10.
11.
A region's elderly population has two sources of growth: net migration and the net aging-in-place of its resident population. This paper outlines a method for identifying the projected relative contribution of these two sources of elderly population growth over time, and illustrates it with data for the states of Arizona, California, Florida, Illinois, and New York. The sources of elderly population growth differ between regions and over time.  相似文献   

12.
Ticket-splitting is becoming increasingly common in American national elections, according to the results of voter surveys. Interstate variations in the amount and nature of ticket-splitting have been estimated using entropy maximizing methods. States are classified according to the degree and direction of ticket-splitting in the 1976 elections.  相似文献   

13.
运用区域系统分析法,着重分析了广西梧州市山地资源开发的优、劣势和开发利用的可能性,进而在山地资源适宜性评价的基础上制定出梧州市山地资源开发的原则、方向和措施.  相似文献   

14.
Extraterrestrial geography has become a reality, as we move from Earth's moon to the planets. A broad-scale regional physiography is being established on twenty planets and satellites through remote sensing techniques. Spacecraft images yield most of the information on Solar System landscapes. Topographic measurements are extracted by monoscopic image-processing, stereophotogrammetry, and radar analysis. Invisible parts of the spectrum furnish non-topographic data.  相似文献   

15.
以终端治理为主的综合整治是针对重污染城市环境问题一个重要举措,但其根本的解决途径在于实现城市的可持续发展。本文以本溪为例,提出了重污染城市的城市建设的各个层次可持续发展的途径和实施方案。  相似文献   

16.
长江流域城市的生态环境问题与跨世纪城市持续发展战略   总被引:8,自引:1,他引:8  
综合分析评价了长江流域城市的生态环境态热与问题,城市水环境依恶化,特别是城市内河道,湖泊水质多污染严重。城市大气污染仍呈加重趋向,一些特大城市汽车尾气污染上升,城市酸雨依然严重。城市生态问题沉重,绿地不足,热岛加重,地面沉降,水土流失等。  相似文献   

17.
A comprehensive approach to the analysis of point patterns demonstrates the usefulness of second-order methods by exploring population distribution in the Chicago region. The methods are based on the development of a distribution of all interpoint distances representing the total covariation in a pattern. Clustering and inhibition models are explored with regard to the population pattern. Some evidence supports a multi-center city hypothesis for the region.  相似文献   

18.
ABSTRACT. The sustainability of creative producers‐businesses and individuals‐depends in part on the state of the urban environment, especially the one of the street. Relationships with the street differ among creative producers with different power positions and levels of embeddedness in street life. Thus an approach to the sustainability of the creative city needs to move beyond the simplistic ideals of “mixed use” and “vitality” to an understanding of the complexity and continuity inherent in the production of creative spaces with respect to the multiple transactions of both the strong and weak stakeholders involved‐the “wolves” and “lambs.” The example used in this article, which draws on evidence from interviews with producers, is the film and television industry in Camden Town, London, in relation to the “experience” economy.  相似文献   

19.
沈阳的郊区化—兼论中西方郊区化的比较   总被引:68,自引:0,他引:68  
周一星  孟延春 《地理学报》1997,52(4):289-299
在我国80年代才开始郊区化过程,研究刚刚起步。亟待城市学界对我国郊区化的特点、机制、发展规律以及与西方的异同进行深入研究,发掘它对城市发展有利的一面,本文正是出于这目的,研究了沈阳的郊区,内容包括地域划分,80年代是否开始、大体的强度,90年代的 状况,机制分析和调控建议。  相似文献   

20.
唐亦功 《地理研究》1995,14(4):42-50
通过对京津唐地区金至民国时期人口变迁和土地开发的研究,对这一时段各个历史时期人口和土地开发的规律和特征进行了探讨.认为京津唐地区的土地开发过程与相应时期的人口变化密切相关.对本地区人口——土地亩数进行的相关分析表明,清嘉庆以前,这一地区的土地开发规模与人口的增长符合线性方程y=522+5.24x.这说明在此阶段二者间的变化是循着一定的规律进行的.清嘉庆未至民国时期,人口与土地的关系则不符合上述方程,显示出在人口——土地开发的渐变过程出现了一个突变的断层.这表明在一定的社会生产力水平下,人口与土地开发间的规律已被打破,从而引起了环境进一步的改变.  相似文献   

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