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   4943篇
  免费   124篇
  2024年   14篇
  2023年   63篇
  2022年   87篇
  2021年   81篇
  2020年   183篇
  2019年   165篇
  2018年   169篇
  2017年   189篇
  2016年   193篇
  2015年   111篇
  2014年   145篇
  2013年   552篇
  2012年   323篇
  2011年   299篇
  2010年   226篇
  2009年   265篇
  2008年   290篇
  2007年   316篇
  2006年   280篇
  2005年   270篇
  2004年   179篇
  2003年   153篇
  2002年   161篇
  2001年   77篇
  2000年   99篇
  1999年   32篇
  1998年   18篇
  1997年   18篇
  1996年   11篇
  1995年   12篇
  1994年   17篇
  1993年   17篇
  1992年   10篇
  1991年   10篇
  1990年   7篇
  1989年   4篇
  1988年   2篇
  1987年   1篇
  1986年   1篇
  1984年   1篇
  1983年   7篇
  1982年   2篇
  1981年   1篇
  1980年   1篇
  1979年   2篇
  1978年   3篇
排序方式: 共有5067条查询结果,搜索用时 15 毫秒
991.
The issue of diverse identities imprinted on the urban landscape as the result of political changes and the struggle for power between different social and ethnic groups is analysed here using the example of Katowice, the capital and largest urban centre in Upper Silesia, Poland. Basing their conclusions on systematic investigation of the most important changes and features in the cityscape in five clearly distinct historical periods, the authors explore the conditions and mechanisms of the creation of the city’s symbolic landscape and its links with urban identity. They argue that Katowice represents a peculiar model of urban identity formation in Central and Eastern Europe that has to date not been researched in any depth, in which each successive historical period represents a rupture with the foregoing values and ideas and an attempt to make a new, lasting imprint on the material outlook of the city. The development of such a model of identity is the result of the complex interplay between the city’s changing geopolitical context and its economic and functional development path.  相似文献   
992.
鸦片战争后签订的一系列不平等条约对军舰驻华特权制度给予了明确的规定。《虎门条约》是外国侵略者"合法"获取军舰驻华特权的开始。美、法等国通过《望厦条约》、《黄埔条约》使这一特权制度日趋完善。在攫取军舰驻泊权的过程中,美国人顾盛使外国军舰驻华特权条款扩展到几乎可以被人任意解释的地步,为日后列强军舰任意游弋中国内水埋下了祸根。通过第一批不平等条约,西方有约国家获得了军舰驻泊特权。第二次鸦片战争中,列强在这一问题上获得了较大突破,此后该制度逐步走向完善。  相似文献   
993.
The history of research into the Middle Stone Age of East Africa and the present state of knowledge of this time period is examined for the region as a whole, with special reference to paleoenvironments. The known MSA sites and occurrences are discussed region by region and attempts are made to fit them into a more precise chronological framework and to assess their cultural affinities. The conclusion is reached that the Middle Stone Age lasted for some 150,000 years but considerably more systematic and in-depth research is needed into this time period, which is now perceived as of great significance since it appears to span the time of the evolution of anatomically Modern humans in the continent, perhaps in East Africa.  相似文献   
994.
This paper analyzes intentional burial as a historical phenomenon. Mortuary practices are viewed as a particular sphere of human activity, involving the transfer of the physical remains from one natural environment to another. The general and specific laws governing mortuary treatment and its development are discussed, and the earliest known deliberate burials—those of the Middle Paleolithic—are examined against this theoretical background. Middle Paleolithic groups invented almost all the basic ways of treating a corpse before burial and almost all the ways of burial itself. They seem to have developed a cult of the dead, based upon dualities such as concealment vs exposure of the body, burial of the body intact vs disarticulated, burial of the whole body vs parts of it only, and so on. It is shown that, in the Middle Paleolithic, there were centers of taphological activity, that inhumation was selectively practiced on only a small minority of the population, that men were buried much more often than women, and that the patterns of burial seem to have been independent of identifiable factors such as human physical type or level of technology.  相似文献   
995.
Southeastern Central Europe is quite rich in finds of progressive Neandertals from Middle Paleolithic contexts and early modern humans associated with evolved Upper Paleolithic (Aurignacian and Pavlovian). There are no human fossils that can be related to the transitional Middle-Upper Paleolithic units (the Bohunician and the Szeletian); thus, from anthropology we know only that the transitional period began with Neandertals and ended with modern humans. The archaeological record is more complex. The Jankovichian industries of Hungary differ from the mostly non-Levallois Middle Paleolithic of Central Europe in the presence of some Levallois; they seem to be technologically related to the Levallois-Leptolithic Bohunician industries of Moravia, dated to 43,000–38,000 B.P., which are the first transitional Upper Paleolithic unit. The appearance of the Szeletian before 42,000 B.P. in Hungary and at about 39,000 in Moravia represents a technological variation of the transition, although retaining marked local Middle Paleolithic elements. The date of the appearance of the typical Aurignacian, the first culture clearly related to modern humans, is unclear, but it certainly developed after 36,000 B.P. and has several dates between 35,000 and 30,000 B.P.  相似文献   
996.
The results of a study of recent predatory mite faunas, characteristic of the dung of different domestic animal species, forms the basis of a two-step identification method for archaeological dung deposits. The method is illustrated by a study of the remains of the predatory mites found in 12 mediaeval dung samples from the north of The Netherlands.  相似文献   
997.
Early Upper Paleolithic sites are known in various parts of Eastern Europe, but the two main concentrations of them are the Prut-Dniester basin and the middle Don. The flint industries are divided into archaeological cultures (cultural traditions), of which some show clear archaic features (Kostenki-Streletsian, Gorodtsovian, Brynzenian, etc.), while others have no Mousteroid characteristics (Spitsynian, Telmanian, etc.). Both types of culture coexisted throughout the Early Upper Paleolithic. In some cases, it is possible to trace genetic links between archaeological cultures and to follow the transition between the Middle and the Upper Paleolithic. The radiocarbon age of the oldest Upper Paleolithic sites in the Russian Plain is about 40,000 B.P., but some sites may be older. The Early Upper Paleolithic ended about 24,000–23,000 B.P. In the Crimea, the Middle-Upper Paleolithic transition appears to have taken place at about 20,000–18,000 B.P.  相似文献   
998.
This paper presents new information from funerary contexts in the lower Ica Valley, on the south coast of Peru, spanning two millennia from the end of the Early Horizon to the Late Intermediate Period. Although severely looted, these sites can still yield valuable information. We discuss their architecture and material culture in the context of radiocarbon dates. Among other findings, these cast new light on the poorly understood transition from the Middle Horizon to the Late Intermediate Period, for which a paucity of archaeological data from ca. a.d. 1000–1250 has long been taken as evidence of an environmentally- or socially-induced demographic collapse. Yet the data we present here suggest that the basins of the lower Ica Valley were likely occupied continuously over this period, and that the echoes of Wari influence here may have lasted longer than previously thought.  相似文献   
999.
We examine two related questions that are key for understanding collaborative outcomes in complex governance systems. The first is the extent to which collaboration among policy actors depends upon their joint participation in policy forums. The second is how the scales at which these forums operate conditionally affect the likelihood of collaboration. We address these questions using data from a recent survey on actors’ collaborative interactions as well as their participation in climate change adaptation policy forums in the Lake Victoria region in East Africa. Exponential random graph models show that actors are more likely to collaborate if they jointly participate in policy forums. However, this effect weakens at progressively higher spatial levels at which forums operate. Similarly, collaboration is less likely among actors jointly participating in forums that sponsor decision making at the higher collective choice level rather than lower operational choice level. While policy forums may catalyze collaboration, our findings suggest that their capacity to do so may be subject to scale‐dependent transaction costs of political contracting.  相似文献   
1000.
Hopewell bladelets represent one of a handful of standardized blade industries in prehistoric North America. In the past 25 years, archaeologists produced a great deal of published research on Hopewell bladelets. Yet much remains to be explained about this lithic tradition. This project presents the results of functional analysis of bladelets from two sites near the Stubbs Earthworks along the Little Miami River in southwest Ohio. Results indicate that bladelet use at these sites largely focused on bone/antler processing. This is in contrast to the generalized function of many of the artifacts in Ohio bladelet assemblages and provides researchers with another piece of the puzzle in examining the variation in bladelet function between sites and across regions.  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