首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   974篇
  免费   7篇
  981篇
  2024年   3篇
  2023年   11篇
  2022年   10篇
  2021年   6篇
  2020年   32篇
  2019年   64篇
  2018年   64篇
  2017年   61篇
  2016年   35篇
  2015年   24篇
  2014年   23篇
  2013年   144篇
  2012年   44篇
  2011年   30篇
  2010年   39篇
  2009年   41篇
  2008年   45篇
  2007年   46篇
  2006年   31篇
  2005年   31篇
  2004年   22篇
  2003年   18篇
  2002年   18篇
  2001年   22篇
  2000年   16篇
  1999年   21篇
  1998年   17篇
  1997年   14篇
  1996年   10篇
  1995年   7篇
  1994年   11篇
  1993年   6篇
  1992年   1篇
  1989年   1篇
  1988年   1篇
  1986年   1篇
  1984年   2篇
  1983年   3篇
  1982年   1篇
  1981年   2篇
  1979年   1篇
  1978年   2篇
排序方式: 共有981条查询结果,搜索用时 0 毫秒
31.
Small procellariids, mainly petrels, prions and shearwaters, were hunted at their rookeries in various parts of the southwest Pacific during the early historical era. The industries, some of which continue, arose from both traditional, indigenous, practices of prehistoric origin and subsistence necessity in early European settlements. The history and main features of the Tasmanian and southern New Zealand ‘muttonbird’ industries are described, together with brief summaries of those on Chatham, Raoul and Norfolk islands. Procellariid hunting occurred in two different situations, on isolated tropical islands, where its impact was often devastating, and on temperate islands associated with the East Australian Current, a western boundary current like the Gulf Stream. In the latter case, procellariid populations were very large and resilient to predation. In Tasmania, muttonbirds were taken for immediate consumption, but in New Zealand and other Polynesian islands there was preservation for storage. However, a common feature seems to have been the late development of systematic procellariid hunting, possibly because of the relative costs of access to the resource, although other explanations cannot be ruled out.  相似文献   
32.
Recent investigations of botanical material from archaeological sites have provided seeds and plant remains exhibiting a crystalline or semi-crystalline appearance. X-ray diffraction and partial chemical analysis have revealed that the particular plant materials had been replaced by calcium phosphate. Using systematic sampling and retrieval techniques a significant body of data has been accumulated. Most mineralized botanical evidence has been recovered from faecal deposits, in particular cess pits and garderobes, and has provided an important source of information about aspects of diet of past populations.  相似文献   
33.
Archaeology is a practice that exists within various social contexts. As such, the way it is practiced is dependent upon the class interests of those who fund and undertake archaeological investigations. These interests in turn can be influenced by existing political regimes. In this article, I discuss how class interests have influenced the direction of Brazilian archaeology for the past century and a half.  相似文献   
34.
Great Basin archaeologists spent the 1970s and most of the 1980s tearing down the Desert Culture hypothesis without presenting compelling means for dealing with the empirical variability that made it untenable. Recent research seeks to understand this variability by examining the effect of key variables in extreme environmental contexts, especially in wetlands and at high altitudes, and by developing and refining models of optimality that anticipate variability as the local expression of general evolutionary ecological principles. Research on intraregional and ethnic variability has lagged behind—the former because it is said to be costly, the latter because it is problematical in theory.  相似文献   
35.
    
Inlays range among the most aesthetically pleasing and technically challenging glasses produced in the Ptolemaic period. Despite the central role of this phase in the history of glass technology, little is known about the recipes and the technological knowledge of the Egyptian artisans. This paper will thus focus on the study of the materials from the secondary workshop of Tebtynis (Fayum oasis, Egypt). We report the first multi-methodological study comprising textural, chemical, and mineralogical analyses (optical microscopy, scanning electron microscopy coupled with energy-dispersive system, electron probe microanalysis, and μ-Raman spectroscopy) on a set of 81 colorless, white, blue, and green samples carefully selected among the 800+ glasses from the craft area now stored at the Museo Egizio, Turin (Italy). Our study offers the biggest compositional database of well-dated Ptolemaic glasses currently available in the literature, highlighting some interesting novelties regarding the silica and alkali sources, and the coloring and opacifying techniques employed. The results suggest a specialized craft of traditional origin, but open to innovation and experimentation, as expected from transitional phases.  相似文献   
36.
    
This paper examines the theory and practice of the maritime cultural landscape in general, and projects the theoretical concepts and aspects involved on the highly dynamic late medieval north‐eastern Zuiderzee region in the Netherlands. The cultivation of land and marine erosion (floods and rising sea level) are considered as the main factors that caused the transformation of the physical landscape of this region from peatlands with freshwater basins into a tidal lagoon. As a consequence, multiple settlements drowned, large areas of land submerged, and culture and the landscape gradually became more maritime, giving the research area a cultural identity and dimension.  相似文献   
37.
Since the 1950s, US strategic architecture in the Indo-Pacific has been premised on its hubs-and-spokes model of bilateral alliances and security partnerships. Since the 2000s the US began working toward forging deeper interrelationships between its regional allies and partners. The emerging strategy ultimately aims to interlink long-standing allies like Japan and Australia, and also non-traditional partners in the development of a security network capable of maintaining the regional ‘rules-based order.’ In analysing the US-led triangular Indo-Pacific geometry, this article considers the prospects of an evolving and substantive US–Australia–Indonesia security trilateral. It does so by utilising Miller’s ‘conditions for cooperation framework’ to test the likelihood of greater cooperation between these three states. These conditions include cultural similarity, economic equality, habits of international association, the perception of common danger, and greater power pressure. It concludes that while there remain strict limitations on any formal alignment between the ANZUS partners and Indonesia, there are convergent interests in key sub-strategic areas in the maritime space and thus a viable path toward greater trilateral cooperation but not, as yet, formal arrangements.  相似文献   
38.
    
Between 2006 and 2013, the island of Tromelin (Indian Ocean) was surveyed and excavated within the framework of the UNESCO project “Forgotten Slaves.” Archaeozoological studies evidenced the survival behaviours and subsistence strategies implemented by the l'Utile shipwreck victims abandoned on the island between 1761 and 1776. The ichthyoarchaeological analysis of 4,282 fish bones resulted in the identification of individuals belonging to 24 families of Teleostei and Chondrichthyes, among which Carangidae (jacks) largely dominate, followed by Serranidae (groupers), Acanthuridae (surgeonfishes), Balistidae (triggerfishes), Lutjanidae (snappers), and Pomacentridae (damselfishes). All of the cranial and postcranial elements were examined, and the taxonomic determination led to genus and species level attributions whenever possible. The composition of the assemblage, the ecology of the taxa, the nature of the nearby marine biotopes, and the fishing gear unearthed on the site provided helpful data to characterise the probable fishing techniques used by the survivors. Although line fishing along the drop‐off and offshore with a watercraft might have been practiced widely by the Malagasy slaves, spearing and/or harpooning on the sandbank and coral reef, as well as hand gathering in the tidal pools off the reef flat surrounding the island, could also have greatly contributed to the overall catch. The results of this study reveal that this broad‐spectrum exploitation of marine resources was opportunist, though it required skill and knowledge. They also shed light on the adaptation of the castaways to survive extreme conditions.  相似文献   
39.
    
ABSTRACT

The metaphor of catalytic environments adequately accentuates the key role of natural factors in social change without superseding the significance of human agency. In this approach, natural resources are integrated into social practices and strategies while avoiding an environmentally deterministic perspective. The case study of MC-6, Middle Caicos, Turks & Caicos Islands, demonstrates how the natural availability of salt, fish, and cotton affected processes of social change, including settlement practices, food procurement strategies, and long-distance exchange. The inhabitants of MC-6 chose these resources within a social framework of historic practices and regional interaction, while simultaneously depending on local natural conditions and environmental factors. Although environmental diversity in the Caribbean highlights the relevance of catalytic environments, this approach is a tool to examine the dialectic interaction between humans and environments at a global scale.  相似文献   
40.
    
ABSTRACT

This paper presents the results of the analyses of 3793 bird remains archaeologically recovered from seven late pre-Hispanic sites (~AD 1000–1500) on islands of the Venezuelan Caribbean. In order to address subsistence and manufacturing uses of bird bones, we first discuss the recovery process of this unique sample. We proceed to investigate the bones' archaeological contexts as well as the taphonomy in play and analyze diverse bone categories. We found that indigenous peoples consistently targeted several families of birds for food or feathers or both, and that avian bones were used for fashioning tools and adornments. We also discuss possible signatures of island campsite seasonal occupancy as inferred from the bio-ecology of the identified bird taxa. The data suggest that the differentiation of nesting grounds between the Red-footed and Brown Booby in the Southeastern Caribbean may be a result of anthropogenically-induced adaptation. The findings discussed in this paper open challenging avenues for assessing long-term changes in bird communities including the dynamics of resident and wintering bird populations.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号