全文获取类型
收费全文 | 321篇 |
免费 | 18篇 |
出版年
2023年 | 3篇 |
2021年 | 4篇 |
2020年 | 8篇 |
2019年 | 16篇 |
2018年 | 12篇 |
2017年 | 17篇 |
2016年 | 22篇 |
2015年 | 7篇 |
2014年 | 9篇 |
2013年 | 82篇 |
2012年 | 12篇 |
2011年 | 7篇 |
2010年 | 3篇 |
2009年 | 14篇 |
2008年 | 13篇 |
2007年 | 8篇 |
2006年 | 6篇 |
2005年 | 6篇 |
2004年 | 6篇 |
2003年 | 4篇 |
2002年 | 6篇 |
2001年 | 5篇 |
2000年 | 5篇 |
1999年 | 4篇 |
1998年 | 2篇 |
1993年 | 2篇 |
1992年 | 3篇 |
1991年 | 2篇 |
1990年 | 2篇 |
1988年 | 3篇 |
1986年 | 1篇 |
1984年 | 1篇 |
1983年 | 3篇 |
1982年 | 2篇 |
1981年 | 2篇 |
1980年 | 2篇 |
1979年 | 3篇 |
1978年 | 5篇 |
1977年 | 4篇 |
1974年 | 1篇 |
1973年 | 2篇 |
1972年 | 2篇 |
1971年 | 2篇 |
1970年 | 2篇 |
1969年 | 1篇 |
1967年 | 2篇 |
1966年 | 2篇 |
1965年 | 1篇 |
1959年 | 3篇 |
1953年 | 1篇 |
排序方式: 共有339条查询结果,搜索用时 15 毫秒
31.
This paper presents a method for estimating edge length from flake dimensions. Comparison of estimated values with data from measured flake edges demonstrates the robusticity of the method. Building on the work of Braun (Braun, D.R., 2005. Examining flake production strategies: examples from the Middle Paleolithic of Southwest Asia. Lithic Technology 30, 107–125; Braun, D.R., Harris, J.W.K., 2003. Technological developments in the Oldowan of Koobi Fora: innovative techniques of artifact analysis and new interpretations of Oldowan behavior, in Mora, R., de la Torre, I. (Eds.), Oldowan: Rather More than Smashing Stones. Treballs d’ Arqueologia 9, pp. 132–144) this estimate is used to generate an edge length to mass value for complete flakes—taken to be a proxy for flaking efficiency. It is shown that this value is useful in tracking the onset, variability and decline of a well known technological phase—the Howiesons Poort of South Africa. The results suggest that the Howiesons Poort was a time in which flaking efficiency was emphasised. Furthermore, comparison of upper limits of edge to mass values for different raw materials may provide an insight into changes in raw material selection. 相似文献
32.
Alex Law 《Geografiska annaler. Series B, Human geography》2005,87(4):267-277
In this paper, the conception of .Great Britain. — a wholly unsatisfactory nomenclature — as an island nation is examined. In this case, a relatively small land mass acted as an originary point of departure for outward‐bound Great Power projections across the open spaces of seas. This paper further explores the varied implications for nationalism within Britain of the diverse island ‘roots’ of the British navel and the ‘routes’ of British navalism. Three themes recur in the popular mobilization of British maritime island nationalism: the besieged island, the island as universal exemplar of civilization, and the navy as national protector. Some consideration is given to the significance of island symbols such as Britannia as a marker of the fate of great island nationalism. 相似文献
33.
Matt A. White Alex G. Cook Scott A. Hocknull David A. Elliott 《Alcheringa: An Australasian Journal of Paleontology》2013,37(4):435-441
WHITE, M.A., FALKINGHAM, P.L., COOK, A.G., HOCKNULL, S.A. & ELLIOTT, D.A., 2013. Morphological comparisons of metacarpal I for Australovenator wintonensis and Rapator ornitholestoides: implications for their taxonomic relationships. Alcheringa 37, 1 - 7. ISSN 0311-5518.Various comparisons of left metacarpal I of the Australovenator wintonensis holotype have been made with Rapator ornitholestoides. These specimens were identified as being morphologically more similar than either was to that of the neovenatorid Megaraptor namunhuaiquii. Owing to the poor preservation of A. wintonensis and R. ornitholestoides, distinct morphological separation between the two appeared minimal. The recent discovery of a near perfectly preserved right metacarpal I of A. wintonensis enables a direct and accurate comparison with R. ornitholestoides. Distinct morphological differences exist between the metacarpals of the two species. A re-evaluation of the age of the A. wintonensis holotype site (AODL 85 ‘Matilda Site’) with zircon dating reveals a maximum age of 95 Ma, 10 Ma younger than the Griman Creek Formation at Lightning Ridge, from which R. ornitholestoides was recovered. This age difference detracts from the probability that the specimens belong to the same genus.Matt A. White? [fossilised@hotmail.com], School of Engineering, The University of Newcastle, Callaghan, New South Wales 2308, Australia; Peter L. Falkingham? [pfalkingham@rvc.ac.uk], Department of Comparative Biomedical Sciences, Structure and Motion Laboratory, Royal Veterinary College, London, UK; Alex G. Cook [alex.cook@y7mail.com] and Scott A. Hocknull [scott.hocknull@qm.qld.gov.au], Ancient environments, Queensland Museum, Hendra, Queensland, 4011, Australia; David A. Elliott [david.elliott@aaod.com.au], Australian Age of Dinosaurs Museum of Natural History, The Jump Up, Winton, Queensland, 4735, Australia. ?Also affiliated with Australian Age of Dinosaurs Museum of Natural History, The Jump Up, Winton, Queensland 4735, Australia. ?Also affiliated with Department of Ecology and Evolutionary Biology, Division of Biology and Medicine, Brown University, USA. Received 22.9.2012; revised 13.1.2013; accepted 17.1.2013. 相似文献
34.
As heritage research has engaged with a greater plurality of heritage practices, scale has emerged as an important concept in Heritage Studies, albeit relatively narrowly defined as hierarchical levels (household, local, national, etcetera). This paper argues for a definition of scale in heritage research that incorporates size (geographical scale), level (vertical scale) and relation (an understanding that scale is constituted through dynamic relationships in specific contexts). The paper utilises this definition of scale to analyse heritage designation first through consideration of changing World Heritage processes, and then through a case study of the world heritage designation of the Ningaloo Coast region in Western Australia. Three key findings are: both scale and heritage gain appeal because they are abstractions, and gain definition through the spatial politics of interrelationships within specific situations; the spatial politics of heritage designation comes into focus through attention to those configurations of size, level and relation that are invoked and enabled in heritage processes; and researchers choice to analyse or ignore particular scales and scalar politics are political decisions. Utilising scale as size, level and relation enables analyses that move beyond heritage to the spatial politics through which all heritage is constituted. 相似文献
35.
Steven C. Hughes 《Journal of Modern Italian Studies》2016,21(1):97-125
The author postulates the use of chivalric language and tropes as part of the interventionist rhetoric that helped bring Italy into the First World War. Despite obvious affinities between the culture of dueling and the ‘virile assumptions’ of the interventionists, including their own participation in many duels, a review of the three major interventionist newspapers reveals the presence of surprisingly little chivalric language (sfida, vertenza, duello) during the crisis. This absence is explained primarily as a result of the rapid and effective dehumanization of the central powers, which disqualified them as gentlemen worthy of chivalric challenge. In addition, the use of the term ‘honor’ was found to be complicated by continuing confusion over Italy’s possible ‘betrayal’ of the Triple Alliance, which only faded after the treaty was finally rescinded in May 1915. 相似文献
36.
37.
38.
39.
文化定式是指在跨文化交际过程中,人们将具有相同特征的一群人或者任何民族、种族塑造成一定的形象。不同的社会文化背景和历史条件下,人们对事物的认识会发生变化,有时认识与真实情况完全相悖。苏联不同时期社会对外部世界的认识不一,根本原因在于官方宣传的引导,次要原因是社会传统和文化传承。既有的社会文化定式将长期影响人们对事物的认识。 相似文献
40.