南粤客家围与中原文化

聚族围居,是客家民系的重要特征之一。客家围不仅有丰富的社会和文化内涵,而且还凝结了现今仍然存在或已经失落的中原文化。它是中原建筑文化的传承,聚族而居的躯壳,中原古代礼制的化石,儒家思想的体现,佛、道文化的反映,小农经济的基地,滚动发展的宿营,人与自然和谐的杰作。     

集体化时期农村人口流动剖析--以赣闽粤边区为例

学界一般认为,在长达20多年的集体化时期,农村人口难以流动,农村社会几乎是一个不流动的社会.通过对赣闽粤边区农村人口流动剖析后发现:集体化时期,农村社会仍然流淌着人口流动的涓涓细流;这些细流,既有城镇人口的下乡流,也有农村劳力的进城流,还有农村内部的人口迁移流.集体化时期很大程度上是一个由体制安排移民的时代;集体化时期的农村社会,很大程度上是一个人口向农村、向山区迁流的社会.     

From 'industrial districts' to 'knowledge clusters': a model of knowledge dissemination and competitive advantage in industrial agglomerations

This paper integrates knowledge-based theories of the firm withgeograph-ical studies of industrial agglomeration to producea model that helps explain the competitive advantages enjoyedby proximate firms located in geographical clusters. We proposea hierarchy of specialized knowledge stocks at both firm andcluster levels and suggest that the comparative advantage conferredby knowledge resources at each level is protected, in part,by asymmetries in knowledge flows from level to level. The paperargues that codified component knowledge is more easily spreadthan firm-specific architectural knowledge. Nevertheless, overtime, agglomerations may develop a cluster-specific form ofarchitectural knowledge that facilitates the rapid disseminationof knowledge throughout the cluster by increasing the learningcapacity of proximate firms and thereby conferring cluster-specificcompetitive advantages.     

Infiltration of basinal fluids into high-grade basement, South Norway: sources and behaviour of waters and brines

Quartz veins hosted by the high‐grade crystalline rocks of the Modum complex, Southern Norway, formed when basinal fluids from an overlying Palaeozoic foreland basin infiltrated the basement at temperatures of c. 220°C (higher in the southernmost part of the area). This infiltration resulted in the formation of veins containing both two‐phase and halite‐bearing aqueous fluid inclusions, sometimes with bitumen and hydrocarbon inclusions. Microthermometric results demonstrate a very wide range of salinities of aqueous fluids preserved in these veins, ranging from c. 0 to 40 wt% NaCl equivalent. The range in homogenization temperatures is also very large (99–322°C for the entire dataset) and shows little or no correlation with salinity. A combination of aqueous fluid microthermometry, halogen geochemistry and oxygen isotope studies suggest that fluids from a range of separate aquifers were responsible for the quartz growth, but all have chemistries comparable to sedimentary formation waters. The bulk of the quartz grew from relatively low δ¹⁸O fluids derived directly from the basin or equilibrated in the upper part of the basement (T < 200°C). Nevertheless, some fluids acquired higher salinities due to deep wall‐rock hydration reactions leading to salt saturation at high temperatures (>300°C). The range in fluid inclusion homogenization temperatures and densities, combined with estimates of the ambient temperature of the basement rocks suggests that at different times veins acted as conduits for influx of both hotter and colder fluids, as well as experiencing fluctuations in fluid pressure. This is interpreted to reflect episodic flow linked to seismicity, with hotter dry basement rocks acting as a sink for cooler fluids from the overlying basin, while detailed flow paths reflected local effects of opening and closing of individual fractures as well as reaction with wall rocks. Thermal considerations suggest that the duration of some flow events was very short, possibly in the order of days. As a result of the complex pattern of fracturing and flow in the Modum basement, it was possible for shallow fluids to penetrate basement rocks at significantly higher temperatures, and this demonstrates the potential for hydrolytic weakening of continental crust by sedimentary fluids.     

Seismic constraints on the effects of gas hydrate on sediment physical properties and fluid flow: a review

The formation of gas hydrates in marine sediments changes their physical properties and hence influences fluid flow. Here, we review seismic indicators of gas hydrates and relate these indicators to gas hydrate formation and fluid migration. Analyses of seismic data from sediments containing gas and gas hydrates in a variety of locations have shown that the characteristic bottom‐simulating reflector (BSR), which commonly marks the hydrate phase boundary is caused mainly by the presence of gas beneath the gas hydrate stability zone (GHSZ). The amplitude of the BSR is also dependent on the hydrate concentration and on the porosity of the sediment. The presence of gas hydrate alters the elastic properties of sediments, particularly if it cements sediment grains. However, multifrequency studies in various geological provinces show that any loss of reflectivity or blanking observed within the GHSZ is dependent on both the nature of the sediments and concentration of hydrate present. Gas beneath the BSR may cause amplitude anomalies and may result in bright spots and enhanced reflections. The presence of gas beneath the BSR is the primary cause of observed amplitude versus offset (AVO) anomalies, but the amplitude of these anomalies is also dependent on the amount of cementation brought by the gas hydrates within the GHSZ. Fluid migration appears to play an important role in the formation and dissociation of gas hydrates in both active and passive margin settings. Fluid migration in accretionary prisms influences hydrate accumulation and may therefore control the spatial distribution of BSRs. Fluid migration may influence also the type of hydrate formed by bringing thermogenic gas containing higher order hydrocarbons to the GHSZ from below. Fluid advection may cause local dissociation of gas hydrates by bringing heat from below, thus shifting the gas hydrate phase boundary. Fluid flow within the GHSZ is limited by the formation of hydrate in the pore space, which reduces the permeability of the sediment. Features such as pockmarks, acoustic masking and acoustic turbidity are indirect indicators of fluid flow and identification of these features in seismic sections within and beneath the GHSZ may also suggest the formation of gas hydrate.     

The tyranny of gendered spaces – reflections from beyond the gender dichotomy

This article argues critically that the consequences of a binary system of gender norms is experienced as a kind of gender tyranny both for those who transgress gender in their daily lives, but also for those whose lives are lived within such constraints. Feminist geographers and urban theorists have argued that space is gendered and that gendering has profound consequences for women. This article extends this analysis and shows how rigid categorizations of gender fail to include the intersexed and transgendered populations, a small and highly marginalized segment of the wider population. This article uses autoethnographic methods to illustrate the ways that those who transgress gender norms experience a tyranny of gender that shapes nearly every aspect of their public and private lives. The nature of these consequences is explored using citations from the transgender and queer literature as well as the lived experience of this tyranny by the author in a continuum of public to private spaces, including: parking lots, public restrooms, shopping malls, the workplace and the home.     

海归的适应策略研究：学院派的案例分析

文章在对部分海归”学院派”深入访谈和个案分析的基础上,运用布迪厄“文化资本理论”、“习性”和“场域”的分析工具,解析了海归“学院派”归国后的不同心态和不同适应策略的选择。得出结论,“文化资本”本身并不足以成为个体适应策略选择的决定因素,“习性”和“场域”概念也是影响个体适应策略选择的因素之一;深层文化认同的非同一性、生活表象与意识深层的非和谐性等复杂的文化意识构成他们独特的行为表象。这些行为表象是其长期海外生活学习所形成的个人“习性”的体现。透过这些表象了解他们的“习性”及其产生的原因,是深入了解他们归国后所选择适应策略的基础。     

1965年中国设立的两个特区

<正>在20世纪60年代前期进行的经济调整过程中,中国共产党和政府采取了许多特殊而有效的措施,完成了国民经济调整的任务,度过了困难时期。在调整后期,中国试图在经济管理体制上找出一条新路,改变统得过多过死的局面。为了照顾特殊地区的发展,1965年先后设置了安达特区和攀枝花特区,成为这个时期计划工作中的亮点。一、开发大庆油田与设立安达特区     

中国村镇主体空间行为博弈及对策分析

我国进入快速城市化发展时期以来,在城市化和工业化的推动下,各类村镇主体的空间行为能力逐步增强,在其追求自身利益最大化的过程中,往往出现不理性的空间行为,在农村地区引发出诸多的空间问题。本文以各类村镇主体(农村居民、企业、农村基层自治组织、地方政府)的空间行为为研究对象,运用博弈理论深入分析各类不良空间行为产生的根源,有针对性地提出相关公共政策建议,以期改变其博弈规则,从而有效引导和规范各类村镇主体的空间行为,优化村镇空间。     

城市群时代中心城市的影响腹地界定研究——以济南市为例

进入21世纪,我国进入城市群快速发展时期,而中心城市的辐射和带动是城市群形成发展的重要基础。本文以济南市为例,通过构建多指标体系,在测算城市中心性强度值的基础上,利用扩展断裂点模型在GIS软件支持下勾勒济南在区外、区内两个层次的影响腹地范围。研究表明:受不同城市作用力影响,济南在区外城市间的影响腹地范围基本吻合山东省西部行政边界,与当前济南都市圈的范围基本一致;而区内腹地范围明显大于济南行政区划,形成了中心城市的高地效应。结合研究成果,对济南城市发展提出诸如合理调整行政区划、改善基础设施和加强都市圈建设等发展建议。