全文获取类型
收费全文 | 1817篇 |
免费 | 11篇 |
专业分类
1828篇 |
出版年
2024年 | 4篇 |
2023年 | 4篇 |
2022年 | 4篇 |
2021年 | 7篇 |
2020年 | 8篇 |
2019年 | 19篇 |
2018年 | 284篇 |
2017年 | 224篇 |
2016年 | 255篇 |
2015年 | 37篇 |
2014年 | 21篇 |
2013年 | 90篇 |
2012年 | 46篇 |
2011年 | 176篇 |
2010年 | 185篇 |
2009年 | 54篇 |
2008年 | 83篇 |
2007年 | 77篇 |
2006年 | 5篇 |
2005年 | 34篇 |
2004年 | 16篇 |
2003年 | 11篇 |
2002年 | 5篇 |
2001年 | 8篇 |
2000年 | 11篇 |
1999年 | 6篇 |
1998年 | 4篇 |
1997年 | 6篇 |
1996年 | 6篇 |
1995年 | 10篇 |
1993年 | 9篇 |
1992年 | 5篇 |
1991年 | 4篇 |
1990年 | 4篇 |
1986年 | 4篇 |
1977年 | 9篇 |
1976年 | 5篇 |
1975年 | 4篇 |
1972年 | 5篇 |
1971年 | 6篇 |
1970年 | 4篇 |
1969年 | 5篇 |
1968年 | 5篇 |
1967年 | 4篇 |
1966年 | 4篇 |
1964年 | 3篇 |
1961年 | 3篇 |
1960年 | 3篇 |
1959年 | 4篇 |
1950年 | 3篇 |
排序方式: 共有1828条查询结果,搜索用时 0 毫秒
141.
Patricio López Isabel Cartajena Diego Carabias Carla Morales David Letelier Valentina Flores 《Archaeological and Anthropological Sciences》2016,8(2):277-290
Site GNL Quintero 1 (GNLQ1), located on the central coast of Chile, is the only documented Late Pleistocene drowned terrestrial site along the Pacific Coast of South America. Faunal evidence at the site is varied, and so far, remains of the following taxa have been found: extinct Camelidae, Cervidae, Equidae, Mylodontidae, Xenarthra, but also Myocastoridae, Canidae and Octodontidae. Both geological and paleoenvironmental data indicate that GNLQ1 developed in a floodplain or low-energy environment during the Last Glacial Maximum (LGM). Prior to the post-glacial rising of the sea level, the site would have been located several kilometres inland as the paleoshoreline was farther out on the continental shelf. In accordance with this background, the present study addresses the analysis of the spatial distribution of the bone deposits of GNLQ1 by considering both scenarios, the terrestrial phase related to the formation and modification of the fossil assemblage prior to the transgression, and the marine phase, subsequent to inundation. Results indicate modifications related to low-energy flow environment and carnivore activity dominated during the terrestrial phase and the action of marine organisms during the marine phase. Other taphonomic modifications are not easily attributable to either one or the other environmental context. 相似文献
142.
Asier Altuna-García de Salazar 《Irish Studies Review》2016,24(1):95-104
This article breaks new ground in examining how “new Irish” immigrant women have responded to the collapse of Ireland’s Celtic Tiger economy and the different forms of gender discrimination and marginalisation they face both within their minority ethnic communities and the Irish host society. It approaches Ebun Akpoveta’s Trapped: Prison Without Walls (2013) as an exemplary work of fiction which exposes unresolved injustices and inequalities suffered by immigrant women. Akpoveta creates a narrative that complicates previous representations of cultural encounters between newcomers and long-established members of Ireland’s host society, not least because her Nigerian female protagonist arrives as a postgraduate student rather than an asylum seeker or refugee. She fictionalises female experiences of marginalisation, gender-based violence and family dysfunction within an all-Nigerian family that outwardly appears to be a model of integration and social inclusion in an open and welcoming Irish multicultural society. 相似文献
143.
F. Albarde J. Blichert‐Toft F. de Callataÿ G. Davis P. Debernardi L. Gentelli H. Gitler F. Kemmers S. Klein C. Malod‐Dognin J. Milot P. Tlouk M. Vaxevanopoulos K. Westner 《Archaeometry》2021,63(1):142-155
The reasons why the Western Mediterranean, especially Carthage and Rome, resisted monetization relative to the Eastern Mediterranean are still unclear. We address this question by combining lead (Pb) and silver (Ag) isotope abundances in silver coinage from the Aegean, Magna Graecia, Carthage and Roman Republic. The clear relationships observed between 109Ag/107Ag and 208Pb/206Pb reflect the mixing of silver ores or silver objects with Pb metal used for cupellation. The combined analysis of Ag and Pb isotopes reveals important information about the technology of smelting. The Greek world extracted Ag and Pb from associated ores, whereas, on the Iberian Peninsula, Carthaginians and Republican‐era Romans applied Phoenician cupellation techniques and added exotic Pb to Pb‐poor Ag ores. Massive Ag recupellation is observed in Rome during the Second Punic War. After defeating the Carthaginians and the Macedonians in the late second century bce , the Romans brought together the efficient, millennium‐old techniques of silver extraction of the Phoenicians, who considered this metal a simple commodity, with the monetization of the economy introduced by the Greeks. 相似文献
144.
Terri‐Leigh Aldred Charis Alderfer‐Mumma Sarah de Leeuw May Farrales Margo Greenwood Dawn Hoogeveen Ryan OToole Margot W. Parkes Vanessa Sloan Morgan 《The Canadian geographer》2021,65(1):82-96
Rural, remote, northern, and Indigenous communities on Turtle Island are routinely—as Cree Elder Willie Ermine says—pathologized. Social science and health scholarship, including scholarship by geographers, often constructs Indigenous human and physical geographies as unhealthy, diseased, vulnerable, and undergoing extraction. These constructions are not inaccurate: peoples and places beyond urban metropoles on Turtle Island live with higher burdens of poor health; Indigenous peoples face systemic violence and racism in colonial landscapes; rural, remote, northern, and Indigenous geographies are sites of industrial incursions; and many rural and remote geographies remain challenging for diverse Indigenous peoples. What, however, are the consequences of imagining and constructing people and places as “sick”? Constructions of “sick” geographies fulfill and extend settler (often European white) colonial narratives about othered geographies. Rural, remote, northern, and Indigenous geographies are discursively “mined” for narratives of sickness. This mining upholds a sense of health and wellness in southern, urban, Euro‐white‐settler imaginations. Drawing from multi‐year, relationship‐based, cross‐disciplinary qualitative community‐informed experiences, and anchored in feminist, anti‐colonial, and anti‐racist methodologies that guided creative and humanities‐informed stories, this paper concludes with different stories. It unsettles settler‐colonial powers reliant on constructing narratives about sickness in others and consequently reframes conversations about Indigenous well‐being and the environment. 相似文献
145.
ABSTRACT This article examines the royal acclamation ceremonies of the Portuguese crown in order to grasp the responsiveness of the institution of the monarchy and regime to the challenges of modernity throughout the delicate watershed period of the late eighteenth and nineteenth centuries. The Portuguese Catholic and absolutist monarchy of the ancien régime had a strict protocol and a set of insignia of power that acted together at the moment of the acclamation and legitimation of each new king. The purpose of this research is to assess the adaptation and reinvention of these insignia and rituals according to the revolutionary demands of social change and secularization brought about by the turbulent period of the beginning of the nineteenth century: the French military invasions (1807–11); the departure of the royal family, court and administration to Brazil (1807); the liberal constitutional revolution (1820); and the civil war pitting liberals against absolutists (1832–34). The new constitutional monarchy that came out of this revolutionary flow faced many challenges of legitimacy, including the test of its capacity to create a modern royal imaginary updated to the cultural mindset of national and secular societies, and capable of bonding rulers with their people. The authors believe that the study of the acclamation ceremonies in the Portuguese constitutional monarchy can give us an accurate perspective on the quality of the symbolic image of the crown, therefore assessing the political efficiency of rituals as one of the structural aspects for institutional legitimization. 相似文献
146.
Robert Van de Noort Brian Cumby Lucy Blue Anthony Harding Linda Hurcombe Tom Monrad Hansen Andy Wetherelt Jenny Wittamore Andy Wyke 《International Journal of Nautical Archaeology》2014,43(2):292-313
This paper reports on the construction of a full‐scale Bronze Age‐type sewn‐plank boat based on the Ferriby boats. The boat, which was named Morgawr, was constructed in the National Maritime Museum Cornwall in Falmouth, England, during 2012 and the first months of 2013, as part of a larger exhibition in the museum. This paper provides the background and context of the project, describes the process of building the craft, and reflects in particular on differences between Morgawr and the ‘hypothetical reconstruction of a complete sewn‐plank boat’ published in 1990 by Ted Wright and John Coates which formed the basis for this project. 相似文献
147.
Portus Ilicitanus (Picola, Alicante) was the main sea harbour of the Roman Colonia Iulia Ilici Augusta and as such played a crucial role in the supply of fundamental commodities to the Iberian Peninsula. Excavations yielded large quantities of glass in fourth‐ and early fifth‐century contexts. Elemental analysis of 60 samples by laser ablation – inductively coupled plasma – mass spectrometry (LA–ICP–MS) confirmed that the glasses were imported from the Eastern Mediterranean. A majority of the glasses correspond to the HIMTa primary production group, which originates from Egypt. The statistical evaluation of published data of 589 HIMT glasses further revealed differential distribution patterns of the HIMTa and HIMTb subtypes between the Eastern and Western Mediterranean, suggesting chronological trends that are linked to wider geopolitical changes. This demonstrates the need for systematic large‐scale approaches to identify supply patterns and possible factors underlying geographical differences and/or chronological developments. 相似文献
148.
149.
In research to reconstruct the design of a small Dutch vessel of c . 1600, morphometric analysis of ship iconography proved very useful. Both uni-variate and multi-variate modes of statistical analysis, as used in this research, are described and discussed. Four classifications of three-masted, square-rigged Dutch sailing vessels—ships, jachts, large jachts and small jachts—were shown to be clearly distinguished types in the multi-variate data space. 相似文献
150.
A General Misspecification Test for Spatial Regression Models: Dependence, Heterogeneity, and Nonlinearity 总被引:3,自引:0,他引:3
Thomas de Graaff Raymond J.C.M. Florax Peter Nijkamp & Aura Reggiani 《Journal of regional science》2001,41(2):255-276
There is an increasing awareness of the potentials of nonlinear modeling in regional science. This can be explained partly by the recognition of the limitations of conventional equilibrium models in complex situations, and also by the easy availability and accessibility of sophisticated computational techniques. Among the class of nonlinear models, dynamic variants based on, for example, chaos theory stand out as an interesting approach. However, the operational significance of such approaches is still rather limited and a rigorous statistical-econometric treatment of nonlinear dynamic modeling experiments is lacking. Against this background this paper is concerned with a methodological and empirical analysis of a general misspecification test for spatial regression models that is expected to have power against nonlinearity, spatial dependence, and heteroskedasticity. The paper seeks to break new research ground by linking the classical diagnostic tools developed in spatial econometrics to a misspecification test derived directly from chaos theory—the BDS test, developed by Brock, Dechert, and Scheinkman (1987). A spatial variant of the BDS test is introduced and applied in the context of two examples of spatial process models, one of which is concerned with the spatial distribution of regional investments in The Netherlands, the other with spatial crime patterns in Columbus, Ohio. 相似文献