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   11089篇
  免费   140篇
  11229篇
  2020年   148篇
  2019年   200篇
  2018年   224篇
  2017年   248篇
  2016年   324篇
  2015年   216篇
  2014年   215篇
  2013年   2979篇
  2012年   304篇
  2011年   336篇
  2010年   353篇
  2009年   301篇
  2008年   280篇
  2007年   262篇
  2006年   250篇
  2005年   151篇
  2004年   139篇
  2003年   119篇
  2002年   134篇
  2001年   164篇
  2000年   129篇
  1999年   151篇
  1998年   100篇
  1997年   94篇
  1996年   103篇
  1995年   97篇
  1994年   108篇
  1993年   112篇
  1992年   111篇
  1991年   96篇
  1990年   84篇
  1989年   103篇
  1988年   93篇
  1987年   115篇
  1986年   99篇
  1985年   125篇
  1984年   109篇
  1983年   153篇
  1982年   120篇
  1981年   120篇
  1980年   122篇
  1979年   105篇
  1978年   111篇
  1977年   122篇
  1976年   112篇
  1975年   106篇
  1974年   94篇
  1973年   92篇
  1972年   96篇
  1970年   79篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
2.
Summary At the end of the second chapter of the Buddhist Klacakra-Tantra (dated c. 10th century) we find a group of verses in which several doctrines are characterized and criticized: Brahmanism, Vaisnavism, aivism, materialism, Islam and Jainism. Moreover the text refers to Buddhism itself as well as the so-called heterodox Buddhist schools. It is the only old Sanskrit text known until now in which the Islam is mentioned and recognized as a doctrine.  相似文献   
3.
A simulation model of a multiregional labor migration process is developed. Information about employment conditions in alternative regions is transmitted in a combination of three channels. The adopted emission policies directly control the amount of information available to potential migrants which, in turn, determines the potential migrant's perception of the level of welfare in the other regions. The effect of several different advertising policies on migration streams is examined. Employers can pursue a number of policies designed to maximize their return. Other agencies adopt policies that facilitate the matching process between unemployed workers and vacant jobs. Results are presented for a number of simulation experiments.  相似文献   
4.
5.
The neutron activation analysis results from 30 glass samples were subjected to cluster analysis. The reliable localization of part of the medieval glass finds from Preslav enabled the evaluation of the variety of the production of a medieval glass workshop (ninth-tenth century), allowing conclusions to be made about the technological level of glass-making in Bulgaria during the Middle Ages. The work proved that NAA followed by cluster analysis is a successful approach to finding the local and chronological features of the investigated glasses.  相似文献   
6.
Tin mining, based largely on alluvial tin deposited along the line of the ancestral Ringarooma, began in 1875 and reached a peak in the period 1905-9. Output declined thereafter and, following a brief recovery during the Second World War, had virtually ceased by 1981. Neither the methods, location nor level of production remained constant during the mining era. The widespread use of hydraulic sluicing and the proximity of many mines to the main river were major factors contributing to the high rate of sediment supply, with the Briseis mine at Derby being the dominant source. Based on data from published and unpublished papers, and mine records, the variable nature of that supply was estimated using a procedure which takes account of the effects of storage and changing practices. Many input points supplied material but the overall pattern is one in which downstream reaches made later starts and reached later peaks, suggesting that they will continue to experience the effects of an increased sediment load for some time.  相似文献   
7.
In September 1968, one of the authors (P. Mayes), having been appointed Head of Mission by the British Ministry of Overseas Development to act as advisor to the Jamaica National Trust Commission, made recommendations which formed the basis for the establishment of the Port Royal Project. The Project is concerned with the excavation, conservation and presentation of 17th century Port Royal, which was founded in 1655 and destroyed by an earthquake in 1692 (see Fig. 1). For the purposes of archaeology the area was divided into three: the Archaeological-Historical Reserve, encompassing the protected underwater area and lands currently occupied by government facilities at the west end of Port Royal; the area in the centre of Port Royal which is protected archaeologically by modern housing and the area at the east end of Port Royal in which it was proposed that commercial expansion should be allowed on land held on lease from the Jamaican government. Work began early in 1969 in a section of this last area, which was threatened, at that time, by the construction of an hotel. This area was part of the shoal water section of sunken Port Royal (see below and Fig. 2). Since that date excavation headquarters and conservation laboratories have been established in the old naval hospital and the construction of a major museum, the first phase of the presentation programme, has begun.  相似文献   
8.
RACIAL SEGREGATION: A COMMENT   总被引:1,自引:0,他引:1  
  相似文献   
9.
REVIEWS     
Kinship and Social Organization. By W. H. R. Rivers, with Commentaries by Raymond Firth and David M. Schneider. London School of Economic Monographs on Social Anthropology, No. 34. The Athlone Press, 1968. Pp. 1–116. Price 30/– English.  相似文献   
10.
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