福建省城镇流动人口的空间分异格局——基于六普数据的分析

文章基于第六次人口普查数据,运用数理统计、空间自相关和GIS等方法,分析了福建省城镇流动人口的空间分异格局。研究发现,福建省城镇流动人口在沿海多而密集、以区外流动为主,开放性和活跃性明显,而在内陆则少而稀疏、以区内流动为主,封闭性和粘滞性突出,但沿海和内陆均存在内部异质性;大城市流动人口密集且来源地广泛、对人口城镇化影响大,中等城市流动人口规模较小,小城镇对区内流动人口有一定吸纳能力。文章还探讨了城镇流动人口空间分异特征的驱动机制、对区域社会经济发展和城镇化的影响,并提出相关政策建议。     

Differentiation of ceramic chemical element composition and vessel morphology at a pottery production center in Roman Galilee

Cooking pots and bowls from two production locations ca. 200 m from each other at the rural settlement of Kefar Hananya in Roman Galilee were compared employing chemical element composition and vessel-shape analyses. Splits of each pulverized sample, all of which were taken from ceramic wasters, were analyzed by both instrumental neutron activation and high-precision X-ray fluorescence analyses, and computerized vessel-shape analysis was employed for morphological analysis of the same vessel forms from each location. Several statistical techniques (bivariate plots, principal component analysis, cluster analysis and discriminant analysis) were used for analyzing the resultant data. It was found that both the cooking pots and bowls made at each location could be distinguished by employing either chemical composition or morphological analysis. The implications of this work, with regard to investigating both production and consumption sites, and for pottery provenance studies, are discussed. The findings suggest that these analytical techniques can be useful as an aid for chronological differentiations of archaeological pottery.     

国内旅游现象空间分异研究进展与展望

在综述国内关于旅游现象的空间分异研究进展的基础上,作者认为,国内旅游地理学关于旅游现象空间分异方面的研究主要是从旅游资源、旅游产业和旅游地、旅游客源市场和旅游流、旅游地本身等旅游产业发展投入要素方面入手的,对于旅游发展的区域效果方面的研究显得有些不足。在与国外该领域研究进展进行对比的基础上,结合国际国内旅游发展和研究的趋势,作者提倡国内旅游地理学应加强旅游影响空间分异研究。阐述了旅游影响空间分异研究的意义以及基本内容,希望藉此促进我国旅游地理学乃至旅游学研究的进一步完善。     

转型期合肥社会空间分异与重构(1982-2000)

本文利用人口普查数据,以街区尺度为研究单元,以arc GIS为技术支撑,运用空间隔离指数和信息熵模型,对转型期1982-2000年中部城市合肥社会空间分异与重构进行了探讨。结果表明:①转型期合肥城市社会空间分异与重构显著,呈以老城区为中心的同心圈状空间分布特征;②隔离指数值的变化表明,18年间合肥城市内部空间隔离程度显著减弱,混居性逐渐增强;③信息熵值变化表明,18年间合肥社会空间进行了幅度较小的有序重构。最后,对合肥社会空间分异与重构的机制进行了探讨。     

中国社会性公共服务空间分异研究

本文构建了社会性公共服务水平测度指标体系,对1990年以来中国社会性公共服务空间分异过程、特征及机制进行了系统分析。结果表明,中国社会性公共服务的空间分异程度总体上偏高,中国社会性公共服务水平东西两极分化明显,呈东高西低的空间格局;1990-2005年,中国社会性公共服务空间分异过程总体上呈V字形,1990-1994年社会性公共服务空间分异程度趋于缩小,之后转为扩大;中国社会性公共服务的空间分异受两种机制支配,即经济空间分异对社会性公共服务空间分异的导向性影响,以及经济空间分异、人口向东部地区迁移、社会性公共服务发展的滞后性等因素的综合作用。     

住房制度改革对中国城市居住分异的影响

住房制度改革是中国城市居住分异的重要影响因素。住房制度改革后,城市居民可根据自身社会经济特征和消费偏好,选择居住区位和住房与邻里质量,住房选择行为相对自由化。商品房的开发在住房制度改革后得到鼓励,房产商在政府宏观调控指引下,自主选择投资区位,建设不同层次的住房和邻里,以满足不同层次居民的居住需求。不同类型企业、不同工龄的职工在享受房改房的机会明显不同,造成享受者和未享受者住房条件的差异,从而形成居住分异。公共部门的干预使得住房类型构成多样化,出现了经济适用房、房改房和廉租房等资助房,与商品房并存;种种约束条件使得社会群体在不同类型住房中分布并不均衡,形成居住分异。     

The Social and Economic Performance of Australia's Large Regional Cities and Towns: Implications for Rural and Regional Policy

Australia's large regional cities and towns display wide variation in how they are adjusting to the socio‐economic transitions occurring in Australia. That variation is exposed using a multi‐variate model analysing performance on a range of socio‐economic variables over the decade 1986 to 1996 for 122 cities and towns with populations of 10 000 and above at the 1996 census. Those places are classified into seven clusters of community performance reflecting opportunity/vulnerability, and their spatial patterns are mapped. The resulting framework is then used to show how the recent geography of the socio‐economic performance of the large regional cities and towns has a distinctive selectivity and contributes to opportunity in some places and the vulnerable performance of others. The influence of that selectivity can be seen in the mismatched geographic patterns evident from an analysis of shares of national population and employment change, investment in non‐residential construction, levels of welfare dependency, and the ratio between household income tax generation and transfer benefits received. The paper uses the insights drawn from that analysis to pose questions suggesting the need to rethink national policy perspectives for addressing change in non‐metropolitan Australia.     

Shifting social networks along the Nile: Middle Holocene ceramic assemblages from Sai Island, Sudan

During the middle Holocene, profound changes in environment, economy, and social relations laid the foundations for the emergence of Africa’s earliest polities: the Egyptian Old Kingdom and the Kerma state. Regional shifts in economy and society may be reflected in local changes in patterning of ceramic production and exchange. Analysis of two pottery assemblages from Sai Island, north Sudan, reveals dramatic shifts in the scale of cultural spheres and the nature of cross-cultural interaction between 5000 BC (Khartoum Variant) and 2600 BC (Pre-Kerma). Near-sedentary Khartoum Variant hunter–gatherers at site 8-B-10C participated in a longstanding cultural sphere that extended far into the Sahara, but were beginning to focus more tightly on resources by the Nile. By Pre-Kerma times, Sai occupants familiar with animal husbandry started to use southwest Asian plant domesticates; they began to experiment with large-scale storage facilities and engage in long-distance trade along the Nile, outside of their own cultural boundaries. Beyond a shift in axes for contact from east–west to north–south, these changes signal progressive geographic and temporal compression of cultural entities, amidst accelerating processes of economic innovation and social change that finally culminated in the polities of Egypt and Kerma.     

Morphological evolution of three‐dimensional chemical dissolution front in fluid‐saturated porous media: a numerical simulation approach

This paper is concerned with the morphological evolution of three‐dimensional chemical dissolution fronts that occur in fluid‐saturated porous media. A fully coupled system between porosity, pore‐fluid flow and reactive chemical species transport is considered to describe this phenomenon. Using the newly presented concept of the generalized dimensionless pore fluid pressure‐gradient, which can be used to represent the interaction between solute advection, solute diffusion, chemical kinetics and the shape factor of the soluble mineral, a theoretical criterion has been established to assess the likelihood of instability at a chemical dissolution front in the reactive transport system. To simulate the chemical dissolution front evolution in a three‐dimensional fluid‐saturated porous medium, a numerical procedure combining both the finite difference method and the finite element method has been proposed. As the problem belongs to a complex system science problem, a small randomly generated perturbation of porosity is added to the initial porosity of a three‐dimensional homogeneous domain to trigger instability of a planar chemical dissolution front during its propagation within the fluid‐saturated porous medium. To test the correctness and accuracy of the proposed numerical procedure, a three‐dimensional benchmark problem has been constructed and the related analytical solution has been derived. This enables using the proposed numerical procedure for simulating the morphological evolution of a three‐dimensional chemical dissolution front from a stable, planar state into an unstable, fingering state. The related numerical results demonstrate that the proposed numerical procedure is useful for, and capable of, simulating the morphological instability of a three‐dimensional chemical dissolution front within a fluid‐saturated porous medium.