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21.
Weiyang Zhang Ben Derudder Jianghao Wang Frank Witlox 《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(2):117-133
This paper examines the determinants of the spatial and topological structure of three types of urban networks within the Yangtze River Delta. These networks consist of transport infrastructure links, business interactions in producer services firms, and leisure mobility. The influence of distance, size, administrative borders, landform contiguity, cultural affinities, economic alliances and administrative rank are examined. We position our findings as an empirical elaboration of the formation of multiplex urban networks. Our results show that in spite of significant correlations between all of these explanatory factors and the three urban networks, only some factors affect each of the three networks. More specifically, the business network has a weak dependence on distance and cultural affinities; intercity mobility is closely related to the size of cities’ populations and distance; and landform patterns remain a fundamental basis for intercity transport linkages. Our results highlight China’s hierarchical-administrative specifics in the shaping of urban networks. 相似文献
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Ben Guy 《Journal of Medieval History》2018,44(4):381-405
This article explores the ways in which the three fourth-century figures, Constantine the Great (d. 337), St Helena (d. c.330) and Magnus Maximus (d. 388), were represented in texts produced in, or connected with, medieval Wales. The texts concerned may be described as genealogical, hagiographical or literary, and were written in either Latin or Welsh between about 800 and 1250. They include, amongst others, the ninth-century Historia Brittonum, Geoffrey of Monmouth's De gestis Britonum, and the vernacular prose tale Breudwyt Maxen Wledic. It is argued that the appropriation of the fourth-century figures occurred in a more limited number of contexts than has previously been supposed. Moreover, the evidence indicates that writers responsible for composing or redacting texts about these figures were far more likely to turn to earlier written texts for information on their subjects than to any contemporary oral traditions. 相似文献
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Ben Hammer 《古籍整理研究学刊》2012
俞樾是清朝末年著名文献学家,继承戴段二王乾嘉考据学风.对经部、子部典籍做过深入的考证注释工作,尤其是其《群经平议》、《诸子平议》、《古书疑义举例》,对后学影响最为深远.其中,《群经平议》乃经学研究十分有价值的著作.此巨制采取闲诂夹注形式,对经书中部分难懂、不通或具疑问的字句进行考察和释训.本文在此基础上对于其中《礼记·中庸》的内容进一步给以考证,疏通俞樾的说法,弥补其疏漏. 相似文献
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Classical ecological theory predicts that ecological communities should only contain as many species as there are resources. Many ecosystems, however, seem to contain many more species than classical theory allows. Understanding this paradox is central to community ecology and biogeography. Niche-based models consider that differences and trade-offs between species’ life history traits stabilise species interactions and so allow coexistence. In stark contrast, neutral models assume that individuals at the same trophic level interact identically with conspecifics and heterospecifics (i.e. all species are equivalent), and this equivalence allows coexistence. Despite it seeming unlikely that species are equivalent, neutral models do predict some of the macroscopic properties of ecological communities surprisingly well. Although there are many neutral models, the best-known neutral model in the context of community ecology is that described by Hubbell (2001) in the Unified Neutral Theory of Biodiversity. We review the development of neutral theory in ecology and biogeography, consider its predictions and how they can be evaluated, and look at how neutral theory may develop in the future. This article focuses on species-rich plant communities, as they are, for the most part, the test-bed for the recent development and application of neutral models, but we also consider the application of neutral approaches to other taxonomic groups and ecosystem types. 相似文献
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An alabaster lid with a resinous accretion burnt or stuck next to the handle and on the base was uncovered in the Nabataean rest stop in Moyat Aawad (Moa) in the Arava valley in Israel. The analysis of this resin sample utilising GC‐MS revealed several types of compounds. The chemical analysis revealed compounds typically present in pine tar and plant lipid material (probably oil). The use of pine resin, tar and pitch derived from plant resins is documented in antiquity, not only as a sealant or caulking material but also as medicines, antiseptics and ritual balms. 相似文献
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Na'ama Ben Ze'ev 《The Journal of imperial and commonwealth history》2013,41(1):114-133
Culture clubs and social associations were a common social setting in Palestinian towns and in some large villages during the Mandate period. Drawing on a micro-historical approach, this article focuses on four organisations established in Haifa by rural migrants. These organisations are examined as sites of assimilation in the city and they are used as a vantage point from which to observe the daily life experience of their members. The findings suggest that clubs and associations were not only a setting for sports and cultural activities, social gathering or charity. They were an arena for public activity where rural migrants negotiated their position in urban society and participated in developing Palestinian culture. 相似文献
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