全文获取类型
收费全文 | 821篇 |
免费 | 38篇 |
出版年
2023年 | 8篇 |
2021年 | 7篇 |
2020年 | 14篇 |
2019年 | 25篇 |
2018年 | 25篇 |
2017年 | 31篇 |
2016年 | 32篇 |
2015年 | 17篇 |
2014年 | 15篇 |
2013年 | 197篇 |
2012年 | 29篇 |
2011年 | 22篇 |
2010年 | 22篇 |
2009年 | 28篇 |
2008年 | 15篇 |
2007年 | 13篇 |
2006年 | 15篇 |
2005年 | 13篇 |
2004年 | 23篇 |
2003年 | 13篇 |
2002年 | 14篇 |
2001年 | 11篇 |
2000年 | 10篇 |
1999年 | 17篇 |
1998年 | 10篇 |
1997年 | 14篇 |
1996年 | 6篇 |
1995年 | 13篇 |
1994年 | 8篇 |
1993年 | 7篇 |
1992年 | 10篇 |
1991年 | 10篇 |
1990年 | 5篇 |
1987年 | 4篇 |
1985年 | 4篇 |
1984年 | 11篇 |
1983年 | 13篇 |
1982年 | 8篇 |
1981年 | 8篇 |
1980年 | 8篇 |
1979年 | 14篇 |
1978年 | 12篇 |
1977年 | 12篇 |
1976年 | 9篇 |
1975年 | 11篇 |
1974年 | 4篇 |
1973年 | 7篇 |
1972年 | 8篇 |
1971年 | 4篇 |
1970年 | 4篇 |
排序方式: 共有859条查询结果,搜索用时 15 毫秒
91.
Giedre Motuzaite-Matuzeviciute Jérémy Jacob Sergey Telizhenko Martin K. Jones 《Archaeological and Anthropological Sciences》2016,8(1):43-50
During the archaeobotanical investigation of Scythian–Sarmatian period (Early Iron Age), pits with crop processing waste, discovered in the floodplain of Donets River, eastern Ukraine, and charred remains of cereal grains, dominated by broomcorn millet, were recorded. The grains from the pits were radiocarbon dated to the fifth to first century BC. Those pits are distant from any known contemporaneous settlement. The apparent disconnection of these pits from any local settlement suggests that (1) millet was brought from other locations by mobile groups, or (2) millet was cultivated locally by populations whose settlements have left no discernible archaeological trace. The analysis of molecular biomarkers preserved in palaeosols that are stratigraphically connected to the pits revealed high levels of miliacin, a molecule that can be preserved in ancient soils and sediments, and that is consistent with broomcorn millet (Panicum miliaceum). High levels in miliacin in soils stratigraphically connected to the pits are interpreted as the result of a large biomass of P. miliaceum produced at time of soil formation. Our biogeochemical results applied to a palaeosol thus attest to the in situ cultivation of crops dominated by the broomcorn millet during the early Iron Age in the floodplain of Donets River. Biochemical examination of soils and palaeosols can thus provide useful information on past dynamics of land-use by ancient population, especially when settlements or macrobotanical remains are absent. 相似文献
92.
Mark Whitehead Rachel Lilley Rachel Howell Rhys Jones Jessica Pykett 《Social & Cultural Geography》2016,17(4):553-573
This paper opens up a dialogue between mindfulness and the discipline of geography. As a meditative practice that cultivates ‘present-centred non-judgmental awareness’, we claim that the practices and insights of mindfulness have important implications for various forms of geographical enquiry. This paper argues that mindfulness can inform geographical practices in relation to epistemology and methodology, and contribute towards geographically informed critical psychological theory and action. More specifically, we claim that mindfulness could offer a practice-based context to support the study of affects, extend the application of psychoanalytical geographical methods beyond the therapeutic, and contribute to emerging geographical studies of behavioural power and empowerment. This analysis explores these sites of interaction through a series of reflections on the Mindfulness, Behaviour Change and Engagement in Public Policy programme that was developed and delivered by the authors. This more-than-therapeutic mindfulness programme has been delivered to approximately 47 civil servants working in the UK Government. 相似文献
93.
94.
Nina H. Manaseryan Keith Dobney Anton Ervynck 《International Journal of Osteoarchaeology》1999,9(1):74-75
An example of ante‐mortem cranial perforations in the skull of a European wisent (Bison bonasus) from Armenia is presented. The implications for reinterpreting the possible causes of this condition in ancient domestic cattle (outlined in a previous paper) are briefly discussed. Copyright © 1999 John Wiley & Sons, Ltd. 相似文献
95.
J. Buxeda I Garrigs R. E. Jones V. Kilikoglou S. T. Levi Y. Maniatis J. Mitchell L. Vagnetti K. A. Wardle S. Andreou 《Archaeometry》2003,45(2):263-284
The study of technology transfer in pottery production to the periphery of the Mycenaean world has been addressed by considering two different areas, southern Italy and central Macedonia. Technological features such as ceramic paste, decoration and firing have been determined for different ceramic groups established according to provenance criteria. The studies of technology and provenance have been performed following an archaeometric approach, using neutron activation analysis, petrographic analysis, X‐ray diffraction and scanning electron microscopy. The results have revealed the existence of two different models. On the one hand, southern Italy seems to exhibit a more organized pottery production, which follows a Mycenaean‐like technology, while in central Macedonia production is probably more varied, being based in part on the technology of the local tradition. 相似文献
96.
Keith Barber 《Oceania; a journal devoted to the study of the native peoples of Australia, New Guinea, and the Islands of the Pacific》2003,73(4):287-297
Contrary to the popular tendency to scapegoat and demonize urban settlements in Papua New Guinea the trend among academics has been to normalize their existence. There is however little detailed information upon which to base either view. This paper reviews existing studies of urban settlements in Papua New Guinea and finds a lacuna of information on basic livelihood functions. On the basis of a household survey and general observations made during a four‐week period of residence in an urban settlement in Port Moresby, it presents data on household composition, employment, income, expenditure and social identity for one urban settlement. The picture presented describes a way of life that does not support popular stereotypes. 相似文献
97.
98.
Cross-border mergers/acquisitions: a review and research agenda 总被引:2,自引:0,他引:2
Cross-border mergers/acquisitions account for the bulk of contemporaryforeign direct investment. Their significance, which is reinforcingthe position of transnational corporations as the dominant institutionalforce in the global economy, is related to the nexus of processesimplicated in international economic restructuring. Cross-bordermergers/acquisitions are, therefore, important influences uponthe evolution of the space economy, but this perspective onmerger/acquisition activity has been neglected in academic research.This review makes connections between disparate literaturesto identify potential lines of enquiry and attempts to situatethese lines of enquiry within current research agendas in economicgeography. On a basic level, mergers/acquisitions create newcorporate geographies which represent valid objects of researchin the geography of enterprise tradition. However, these corporategeographies are set within the institutional context of social,economic, and political relations. Many of the most interestingresearch questions derive from these contextual relations whichare addressed with reference to issues of embeddedness at variousgeographical scales and also by linking these issues to aspectsof employment and territorial development. 相似文献
99.
Recent innovations in portable energy-dispersive X-ray fluorescence (PXRF) spectrometry have increased its utility for the geochemical characterization of obsidian artifacts for archaeological provenance research. However, concerns over the utility of PXRF instrumental analyses have been raised, focused on the validity and reliability of the geochemical data produced. Here we adopt the framework of Richard Hughes (On Reliability, Validity, and Scale in Obsidian Sourcing Research, 1998), whereby reliability addresses instrument stability and issues of measurement while validity pertains to an instrument’s ability to discern geochemical source provenance. This is done in order to test the utility of PXRF instruments for archaeological provenance research. k-Means cluster analysis was used to test the accuracy of PXRF through statistical comparison of data acquired via laboratory and portable energy-dispersive XRF instruments. Multivariate analysis was employed to demonstrate obsidian source representation at two Classic Maya archaeological sites in southern Belize – Uxbenká and Ek Xux – and to test the validity of data obtained from a PXRF instrument in answering archaeological research questions pertaining to regional interactions between lowland Maya polities. Results suggest that portable XRF instruments produce internally consistent results. However, data acquired from a PXRF instrument are not statistically equivalent to other XRF instruments. This is to say that while PXRF is not a reliable technique, it is valid for questions pertaining to geochemical source representation. 相似文献
100.