基于分形理论的长株潭城市群等级规模结构研究及对策

运用城市群等级规模结构分形理论和方法,对长株潭"3+5"城市群(以下简称"3+5"城市群)的等级规模结构进行了实证研究,通过测算几年来"3+5"城市群等级规模分布的分维值,得出结论:"3+5"城市群规模分布符合分形特征;模型拟合认为其人口、经济分布的分维值均大于1,表明"3+5"城市群等级规模结构集中,已处于发展的相对成熟阶段。为此在对这些特征做出解释的基础上,认为可从强化首位城市、加快长株潭一体化建设、提升次中心城市、重点发展中小城市、加快小城镇建设等方面着手对长株潭城市群等级规模结构进行优化。     

Spondylolysis in the lower thoracic–upper lumbar spine in a British medieval population

Spondylolysis is generally a condition of the lower lumbar spine, but occasionally it is observed at cranial to L4. It is generally agreed that spondylolysis in the lower lumbar spine represents fatigue failure of the neural arch. However, whether a biomechanical explanation is adequate to explain lesions cranial to L4 is disputed. Morphological aspects of spondylolysis at T12–L3 (five cases) are compared with those of lesions at L4–L6 (24 cases) in a mediaeval English skeletal series with the aim of shedding light upon any differences in aetiology of lesions at the two sites. It was found that spondylolysis at T12–L3 was more often unilateral than in L4–L6. In T12–L3, clefts more often took an angulated, dog‐leg course across the pars interarticularis, whereas most in L4–L6 were fairly straight and had an oblique orientation. In T12–L3, clefts often had facetted opposing surfaces suggestive of a diarthrodial joint, but this was only seen once in L4–L6. It is suggested on morphological grounds that facetted defects are more likely congenital than acquired. The need for consideration of factors in addition to activity regimes when interpreting spondylolysis in earlier populations is emphasised. Copyright © 2007 John Wiley & Sons, Ltd.     

馆藏文物保护中数字建模技术应用研究

随着三维扫描技术的发展,三维扫描技术的应用范围逐步扩大。在文物保护领域,三维扫描技术也有着重要的应用。同时,作为博物馆数字化的一个重要组成部分,馆藏文物保护与修复的数字化技术也在不断深入。因此,首都博物馆文物保护分析实验室应用三维激光扫描技术开展了一系列在文物保护分析过程中的数字建模工作,特别是对文物修复和复制的辅助作用进行了有益的尝试。针对工作过程中遇到的技术难点诸如偏色、背景干扰等进行了分析,并提出解决办法,旨在供文物保护领域和计算机技术领域共同探讨研究。     

Clyve Jones and Parliamentary History

The ‘constitutional revolution’ which occurred in Ireland after 1691 meant that parliamentary management became one of the prime functions of the viceroyalty. Interest focused on the Commons, where supply legislation was drafted. But the upper House, though smaller, less busy, and on the whole more easily managed, could not be ignored, since it could still cause major problems for government. The situation for the incoming ministers in 1714 was problematic, since the Lords had been a tory stronghold, and the ‘Church party’, buttressed by the bishops, remained powerful. The situation was a mirror image of Westminster in 1710, when Robert Harley's tory ministry had to cope with a whig-dominated house of lords. This essay analyses the means by which Lord Lieutenant Sunderland (1714–15), and his successors, Lords Justices Grafton and Galway, brought the Irish upper House under control, constructing a court party with some of the elements which Clyve Jones has identified as having been crucial to Harley's strategy in 1710–14: moderate or non-party men, pensioners and placemen depending on government largess, new episcopal appointments and a block creation of peerages. In Ireland it was the new peers who played the most important part. The whigs were able to make some inroads into the episcopal bench, previously a stronghold of toryism, until the issue of relief for dissenters rekindled anxiety over the maintenance of the ecclesiastical establishment, prefiguring future problems.     

Application of magnetic susceptibility on polished stone tools from Western Hungary and the Eastern part of the Czech Republic (Central Europe)

A non-destructive method – magnetic susceptibility (MS, κ) measurement – was used to characterize about 360 Neolithic, Copper and Bronze age polished stone tools of the Miháldy collection (Laczkó Dezső Museum, Veszprém, Hungary), composed of artefacts from three Neolithic (Moravian Painted Ware) workshops around a source of greenschist at Želešice near Brno (Moravia, Czech Republic) and semifinished artefacts from workshops at Neolithic mines in the Jizerské hory Mts. (Bohemia, Czech Republic); in addition, rock reference samples collected from the possible provenance areas and rock outcrops in the Czech Republic, Slovakia and Hungary were analysed as comparative material with the same method. We elaborated a model experience to control the thickness correction factor (TCF) following Williams-Thorpe et al. (2000).Among various stone raw materials of polished artefacts we found basaltic rocks and greenschists-metabasites as the most common.     

Isotopic analysis of the ecology of herbivores and carnivores from the Middle Pleistocene deposits of the Sierra De Atapuerca,northern Spain

Carbon and oxygen isotope values reveal resource partitioning among the large mammal fauna from three contemporaneous Middle Pleistocene hominid-bearing localities within the Sierra de Atapuerca (northern Spain). Carbon isotope values sampled from the tooth enamel of fauna present during Atapuerca Faunal Unit 6 show that a C₃-dominated ecosystem surrounded the area where fossils were preserved during this time. For the herbivores, Fallow deer isotope values are significantly different from Red deer and horses and show that this species did not forage in open environments at this locality. Red deer and horses show similar feeding strategies with less negative carbon values implying use of more open environments for these taxa. For the carnivores, carbon isotope values for Ursus deningeri are significantly different from either lions (Panthera leo) or foxes (Vulpes vulpes) and support the contention that this species is herbivorous. Special metabolic mechanisms involved in hibernation in U. deningeri might also have influenced its isotope values. The carbon isotope values of remaining carnivores were similar and suggest that each was typically a generalist carnivore, eating a wide variety of prey items. While the isotopic results generally correspond to ecology indicated by previous techniques, this study shows that isotope analyses can provide further insights that alternate techniques do not provide. Isotope analyses can help elucidate the ancient ecology of taxa present in the Sierra de Atapuerca during the Middle Pleistocene allowing for an accurate portrayal of the setting in which humans lived.     

3D modelling of magnetic data from an archaeological site in north-western Tlaxcala state,Mexico

In Archaeology, geophysical methods had been applied usually in a qualitative form, limited only to the use of filters that enhance the data display. The main objective in this work is the implementation of a modelling technique that allows us to reconstruct the geometry of buried bodies and the determination of their depths. This is done by means of the estimation of the magnetic moments of archaeological objects using a three-dimensional mesh of individual magnetic dipoles using the least squares method and the singular value decomposition of a weighted matrix to solve the linear problem. The distribution and shape of the underlying archaeological remains can be inferred. This methodology was applied to an archaeological site called Los Teteles de Ocotitla, in the state of Tlaxcala, Mexico. A high-resolution magnetic prospection was carried out in three selected areas (terraces). The most important total field anomalies found on each area were inverted, obtaining results that were corroborated by archaeological excavations. This investigation demonstrates the potential of quantitative geophysical methods for the characterization of archaeological structures, in extension and in depth.     

The application of 3D laser scanning technology to the assessment of ordinal and mechanical cortex quantification in lithic analysis

Recent studies make use of cortex proportion as a proxy measurement for the impact of artefact transport on assemblage formation. Cortex in these studies is measured on an ordinal scale and analysed in relation to mechanical measurements of artefact size. Here we report on the use of a 3D laser scanner to obtain precise measurements from experimental lithic reduction sets. High-resolution measurements of cortex area are compared to measurements obtained through ordinal approximations of cortex proportion and mechanical approximations of artefact size. While the ordinal and mechanical measurements result in considerable error for individual artefacts, estimates improve significantly as sample size increases.     

Improving the interpretability of 3D GPR data using target–specific attributes: application to tomb detection

Three–dimensional (3D) ground–penetrating radar (GPR) represents an efficient high–resolution geophysical surveying method allowing to explore archaeological sites in a non–destructive manner. To effectively analyze large 3D GPR data sets, their combination with modern visualization techniques (e.g., 3D isoamplitude displays) has been acknowledged to facilitate interpretation beyond classical time–slice analysis. In this study, we focus on the application of data attributes (namely energy, coherency, and similarity), originally developed for petroleum reservoir related problems addressed by reflection seismology, to emphasize temporal and spatial variations within GPR data cubes. Based on two case studies, we illustrate the potential of such attribute based analyses towards a more comprehensive 3D GPR data interpretation.     

王湾三期文化的南渐及其相关问题

王湾三期文化早期主要分布于豫中和豫西东部地区,晚期分布地域明显向南扩张,可分为王湾、煤山、杨庄二期和乱石滩四个地方类型,后两个类型系王湾三期文化取代分布于豫南、豫西南和鄂西北地区的石家河文化后形成的,是"禹征三苗"的考古学反映.二里头文化一期集中分布于嵩山周围一带,二期始进抵驻马店-南阳一线.所谓"新砦期"早段实属王湾三期文化最晚阶段的遗存,晚段应属二里头文化一期偏早阶段的遗存,二里头文化一期是目前所知最早的夏文化.