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区域经济增长俱乐部趋同的界定及识别——一个文献评述及中国案例的分析 总被引:1,自引:0,他引:1
从分析角度上,可以把俱乐部趋同界定为时间俱乐部趋同、空间俱乐部趋同和时空耦合俱乐部趋同。考虑到不同的检验方法对俱乐部趋同概念的理解并不相同,对于俱乐部趋同的界定除了考虑时空维度以外,还需按照检验方法进一步细分。本文通过对中国俱乐部趋同的识别,发现了随机型时间俱乐部趋同、空间俱乐部趋同及随机型时空俱乐部趋同的存在性,从而验证了本文定义俱乐部趋同的思路是具有实践价值的。 相似文献
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We present experimental data examining the energetics and identification of axial bipolar reduction in contexts of lithic miniaturization on milky quartz. These experiments answer two specific questions. First, does bipolar reduction provide any benefits over freehand reduction? Second, can axial bipolar reduction be distinguished from freehand reduction? Our data show that bipolar reduction requires significantly less time to reduce a percentage unit of core mass and to produce a millimeter of cutting edge on milky quartz than freehand reduction. Milky quartz bipolar reduction surpasses even the cutting edge production efficiency of obsidian pressure blades. We outline a series of quantitative criteria for identifying bipolar cores and flakes. Our results show that bipolar cores and flakes can be distinguished from those produced using freehand reduction by quantifying platform crushing, distal flake rebound scars, bulb shearing, as well as axial, bipolar, and splintered flake terminations. Our results challenge the widely held perceptions about the wastefulness of bipolar reduction and provide clear guidelines for identifying this reduction strategy in archaeological milky quartz assemblages. 相似文献
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Luca Zan 《International Journal of Cultural Policy》2013,19(1):49-70
Management of Italy's heritage has been in increasing turmoil since 1993. This paper identifies and reviews significant reform attempts, including outsourcing, devolution, managerialism and privatisation. The authors propose a framework for improved understanding of the various solutions examined – distinguishing between professional and organisational centralisation. It is argued that while decentralised organisational management can have positive effects, effective protection of heritage in Italy over the centuries has depended on a complex set of rules concerning stewardship and protection, relying upon centralised professional control. This still has positive value and needs to be preserved through the reform process. 相似文献
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城市旅游在中国:研究回顾与发展展望 总被引:1,自引:0,他引:1
本文对中国城市旅游的研究动态进行了回顾与反思后认为,中国城市旅游研究虽然成果数量多并呈现稳定递增态势,但同时存在着动态研究不足、系统性缺失、研究深度不够以及方法落后等问题。本文从发展目的、形态、生产模式和空间结构四方面对城市旅游进行了重新认识,并探讨了对城市旅游与城市发展以及与城市其他产业的融合和嵌入发展等问题。 相似文献
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L. Capasso 《International Journal of Osteoarchaeology》2007,17(4):350-357
This paper shows that many food remains excavated from Herculaneum were microbiologically contaminated, and that the Romans probably had continuous exposure to gastrointestinal diseases. However, palaeopathological analysis of skeletal remains from Herculaneum shows a low prevalence of non‐specific bone inflammation. Pomegranates and figs, consumed by the population, were mainly dried and invariably contaminated by Streptomyces, a bacterium that produces natural tetracycline, an antibiotic. Histological analysis of the human remains demonstrates fluorescence typical of this substance. The tetracycline‐labelled human remains show that the Roman inhabitants of Herculaneum ate food contaminated by Streptomyces, and this may explain the rarity of inflammatory bone diseases at the site due to non‐specific infection in the living population. This interpretation fits with therapeutic indications suggested by Roman physicians that preserved fruits were used to cure some inflammatory diseases. Copyright © 2007 John Wiley & Sons, Ltd. 相似文献
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M. T. P. Gilbert A. J. Hansen E. Willerslev G. Turner‐Walker M. Collins 《International Journal of Osteoarchaeology》2006,16(2):156-164
A principal problem facing human DNA studies that use old and degraded remains is contamination from other sources of human DNA. In this study we have attempted to contaminate deliberately bones and teeth sampled from a medieval collection excavated in Trondheim, Norway, in order to investigate this poorly understood phenomenon. Five pairs of teeth and bone samples were bathed in water containing various concentrations (from 10−9 and 10−21 g/l) of purified ΦX174 DNA. Subsequently the samples were subjected to a routine decontamination protocol involving a bleach bath followed by exposure to λ=254 nm ultraviolet light, prior to DNA extraction and analysis for evidence of the persistence of the contaminant. The results support previous speculation that bone is more susceptible to water‐borne sources of contaminant DNA, although both bone and teeth are readily contaminated and are difficult to decontaminate using the tested protocol. We believe that this is largely due to the porous nature of bone and teeth facilitating the deep penetration of the contaminant DNA. To simulate a more realistic handling situation, 27 further teeth were directly handled and washed, then decontaminated, prior to assaying for the residual presence of the handler's DNA. Surprisingly, although our results suggest that a large proportion of the teeth were contaminated with multiple sources of human DNA prior to our investigation, we were unable to contaminate the samples with further human DNA. One potential explanation may be the deposition of sediment or other structural changes that occur within the samples as they desiccate post‐excavation, which may protect samples from subsequent contamination, but also prevent the efficacy of bleach baths in decontaminating specimens. Copyright © 2006 John Wiley & Sons, Ltd. 相似文献
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EMILY J. CALLANDER DEBORAH J. SCHOFIELD RUPENDRA N. SHRESTHA 《Geographical Research》2012,50(4):411-420
Using a recently developed measure of multidimensional poverty, the Freedom Poverty Measure, the difference in poverty rates of major cities, inner regional, and other areas have been compared. The population living in ‘other areas’ had the highest proportion of individuals living in freedom poverty. Those in inner regional areas (P = 0.0303) and those in major cities (P < 0.0001) were significantly less likely to be in freedom poverty than those in ‘other areas’. However, when breaking the analysis down to look at the different poverty rates for different age groups across the three regional classifications, it was found that there was no difference in the likelihood of being in freedom poverty between children in inner regional and other areas, adults in inner regional and other areas, and older people in inner regional and other areas. This may indicate that the disadvantage experienced by those living in regional centres has been overlooked in the past and is an emerging contemporary issue for health and education equity as well as economic equality. 相似文献
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As the development of the social marketing in China,intangible asset has been highly valued.While in China,this step of improving the intangible asset is just beginning.In 2006,the intangible asset was been modified in the new .It is connected with the international accounting system.Therefore,the intangible asset is the essential point in the company’s success.The essay will study through the accounting problems of intangible asset to analysis that the importance of intangible asset in Chinese companies and the problems that companies should take care of. 相似文献
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长江三角洲大都市区划分研究——兼论中美大都市区界定指标体系的比较 总被引:4,自引:0,他引:4
本文运用中国大都市区界定指标体系,根据2002年数据对长江三角洲大都市区进行了重新划分。从划分的结果看,后者与前者相比发生较大变化。而中国大都市区界定指标体系对这种变化表现出了一定的不适应性,因此本文试图通过中美大都市区界定指标体系的比较研究为中国大都市区界定指标体系的修订提供参考。 相似文献
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Ilya Kashnitsky Joop De Beer Leo Van Wissen 《Tijdschrift voor economische en sociale geografie = Journal of economic and social geography = Revue de géographie économique et humaine = Zeitschrift für ?konomische und soziale Geographie = Revista de geografía económica y social》2020,111(1):28-44
European regions experience accelerating ageing, but the process has substantial regional variation. This paper examines the effect of this variation on regional economic cohesion in Europe. We measure the effect of convergence or divergence in the share of the working age population on convergence or divergence in economies of NUTS 2 regions. The effect of convergence or divergence in ageing on economic convergence or divergence is quite substantial and, in some cases, is bigger than the effect of changes in productivity and labour force participation. Convergence of ageing leads to economic convergence only when the share of the working age population in rich regions exceeds that in poor regions and the former regions experience a substantial decline in the share of the working age population, or the latter regions experience an increase. During 2003–12, an inverse relationship between convergence in ageing and economic convergence was the rule rather than the exception. 相似文献
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在博物馆微环境污染气体被动采样过程中,常出现被动采样器空白值高及易被污染的问题。针对这些问题,研究者对被动采样整个环节中涉及的进样瓶、提取瓶以及采样器各部件单元进行了空白分析,同时考察了不同制样环境、不同提取环境、不同温度烘干的滤纸对采样器空白值的影响,最终明确了采样器中不同污染离子的来源,提出了控制方案,优化了制样方法,有效降低了整体空白值,出现污染的概率从30%左右降低至5%,为博物馆污染气体采样分析提供了可靠的技术支持。 相似文献
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无酸纸的发展及其在文物保护中的应用 总被引:1,自引:0,他引:1
无酸纸是很重要的一种馆藏文物保护载体.本文对无酸纸的发展现状及在文物保护中的应用进行了总结.同时指出,根据我国文物保护的需要,研制文物保护专用无酸纸并建立相关的评价标准是无酸纸的发展趋势. 相似文献
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中国佛教史学是一个复杂的融合体。它既有佛教因子的影响,也有中国传统文化的痕迹,如易学、玄学、史学、理学等思潮对中国佛教史学形成与发展有着巨大的影响。本文即在佛教与中土文化融合的大视野下,以中国传统文化为切入点,着重阐释中国宋代佛教史家如何将中土传统文化融入到佛教史学视野中,从而成为中国佛教史学一个要素。 相似文献
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Paul Routledge 《Transactions (Institute of British Geographers : 1965)》2003,28(3):333-349
This paper considers grassroots globalization networks, which comprise a diversity of social movements working in association to engage in multi-scalar political action. Drawing upon David Harvey's notion of militant particularism (regarding the problems of effecting politics between different geographical scales), and recent research on networks and their relationship to places, the paper analyses People's Global Action, an international network of social movements opposing neoliberal globalization. From an analysis of the process geographies of People's Global Action, the paper proposes the notion of convergence space as a conceptual tool by which to understand and critique grassroots globalization networks. The paper argues that contested social relations emerge in such convergence spaces and considers the implications of these for theorizing such networks, and for political action. 相似文献
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我国旅游产业融合的障碍因素及其竞争力提升策略研究 总被引:17,自引:0,他引:17
产业融合是伴随着信息技术革命和政府管制放松而出现的一种产业创新方式。旅游产业在面临竞争环境巨变和自身生存发展的压力下,也日益呈现出与其他产业融合的趋势。从系统自组织的角度来看,旅游产业天然具有融合其他产业的特性,但融合中存在的制度、企业及需求方面的障碍因素却制约了旅游产业融合效果的更好发挥。本文基于旅游产业融合视角,探讨了融合对旅游产业竞争力的促进作用,并结合障碍融合的因素,提出了提升旅游产业竞争力和促进旅游产业融合的对策建议。 相似文献