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   2197篇
  免费   93篇
  2023年   29篇
  2022年   7篇
  2021年   9篇
  2020年   47篇
  2019年   49篇
  2018年   368篇
  2017年   297篇
  2016年   322篇
  2015年   64篇
  2014年   73篇
  2013年   199篇
  2012年   62篇
  2011年   185篇
  2010年   191篇
  2009年   54篇
  2008年   96篇
  2007年   81篇
  2006年   10篇
  2005年   35篇
  2004年   18篇
  2003年   9篇
  2002年   5篇
  2001年   13篇
  2000年   6篇
  1999年   6篇
  1998年   5篇
  1997年   6篇
  1996年   2篇
  1995年   5篇
  1994年   2篇
  1993年   3篇
  1992年   1篇
  1991年   1篇
  1989年   1篇
  1988年   1篇
  1987年   3篇
  1986年   2篇
  1985年   2篇
  1984年   2篇
  1983年   1篇
  1982年   2篇
  1981年   1篇
  1980年   2篇
  1979年   1篇
  1977年   1篇
  1976年   2篇
  1975年   1篇
  1973年   3篇
  1972年   3篇
  1970年   1篇
排序方式: 共有2290条查询结果,搜索用时 15 毫秒
1.
This paper explores the role of Hispania in the Atlantic route in Roman times. We analyse the different Atlantic Iberian territories along this route, based on recent archaeological advances and discoveries related to trade as well as the shipping infrastructure. The aim is to explain the origin and evolution of a new maritime area that was completely integrated with the political and commercial structure of the Empire, with trade routes that followed the coastal areas of the Iberian Peninsula all the way to the Mediterranean.  相似文献   
2.
3.
4.
5.
6.
Rich town, center of marble trading, and important port of transit during the Imperial Age, Luni outlived the end of the Roman Empire, although weakend, and experienced without major destruction domination by Byzantines and Longoboards, and annexation to the Carolingian kingdom. Luni held an advantage over other cities of Roman origin in lying along one of the most important land-based routes of the Middle Ages and in lying close to the sea on the mouth of a major river. Yet while neighboring cities were flourishing, Luni reached the lowest point in a decline that culminated in its final abandonment in 1204. The primary cause lay in the vast effects of the area's environmental deterioration. The natural modifications made it nearly impossible to restore its commercial and Mediterranean trading systems and for its population to grow, after the tenth century. Even the presence in town throughout the medieval period of a powerful episcopal authority could not ensure Luni's survival. For the period between the tenth and the thirteenth centuries, the documentation shows considerable activity on the part of the bishops. This was oriented towards the new and more profitable settlements in the countryside around Luni, however, rather than towards the organization and development of lasting economic structures in the city itself. Financial and social elites never arose in the city as in coeval Italian civitates and Luni was unable to become part of the new system of commercial and political relationships in the eleventh and twelfth centuries and was shortly thereafter abandoned.  相似文献   
7.
African Archaeological Review - A set of beads made of glass, gastropod mollusk shell, and fishbone from a Swahili occupation level on Ibo Island (northern Mozambique) is dated to the eleventh and...  相似文献   
8.
9.
Human bones from Late Eneolithic graves and Bronze Age settlement pits in Moravia (Czech Republic) were studied to reconstruct their post-mortem histories based on the distribution of their microbial destruction. Backscattered electrons in a scanning electron microscope (BSE-SEM) were used for visual assessment of bioerosion. Visual data from the histological analysis were transformed into quantitative data using the Waikato Environment for Knowledge Analysis (WEKA) toolkit. The results show that the presence of bioerosion is different between the two groups of samples. The bones from settlement pits display extensive bioerosion whereas the bones from graves display no or arrested bioerosion. The absence of bioerosion in graves is most probably linked with tomb burials of Corded Ware Culture. Given the tombs are frequently not preserved archaeologically, the state of bone bioerosion may serve as an indicator of their existence.  相似文献   
10.
Faunal remains from archeological sites worldwide, especially feces and regurgitated pellets, are usually subjected to paleoparasitological examination, allowing the identification of past animal parasites. In this study, we analyzed 10 samples of South American camelid dung, which played an important role for the ancient human groups in the South-Central Andes, dated between 341 and 1635 calCE, from the Iluga Túmulos site (Pampa del Tamarugal, Tarapacá region, Atacama Desert, Chile). Microscopy examination revealed parasite remains in seven samples, in which oocysts of Eimeria macusaniensis and eggs of Lamanema chavezi/Nematodirus lamae, Trichuris sp., Moniezia sp., capillariids, strongylids, and unidentified nematodes were found. Although some of these species pose a potential health risk to camelids, most are not considered to be of major zoonotic importance, which could explain the absence of these parasites on human coprolites from this site analyzed previously. This first paleoparasitological study on camelid fecal remains from northern Chile sheds light on the occurrence of gastrointestinal parasites and its relationship with Andean ancient human populations and the environment.  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