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   1277篇
  免费   59篇
  1336篇
  2023年   7篇
  2022年   7篇
  2020年   21篇
  2019年   36篇
  2018年   49篇
  2017年   62篇
  2016年   51篇
  2015年   31篇
  2014年   34篇
  2013年   453篇
  2012年   44篇
  2011年   35篇
  2010年   42篇
  2009年   37篇
  2008年   25篇
  2007年   33篇
  2006年   16篇
  2005年   17篇
  2004年   15篇
  2003年   19篇
  2002年   17篇
  2001年   18篇
  2000年   13篇
  1999年   23篇
  1998年   9篇
  1997年   13篇
  1996年   11篇
  1995年   13篇
  1994年   9篇
  1993年   8篇
  1992年   10篇
  1991年   6篇
  1990年   6篇
  1989年   7篇
  1987年   7篇
  1986年   6篇
  1985年   8篇
  1984年   9篇
  1982年   5篇
  1981年   11篇
  1980年   9篇
  1979年   14篇
  1978年   5篇
  1977年   6篇
  1976年   7篇
  1975年   6篇
  1974年   8篇
  1973年   11篇
  1972年   4篇
  1971年   4篇
排序方式: 共有1336条查询结果,搜索用时 0 毫秒
101.
Carl Schmitt's Concept of the Political advances an understanding of the political in which the political is assessed in terms of the autonomy of the friend-and-enemy distinction. This article questions the autonomous foundations of Schmitt's concept of the political. Ultimately, Schmitt's desire to establish the autonomous nature of the political, allowing the specifically political antithesis to achieve mastery over all other forms of discourse, is replete with paradox. Whilst Schmitt endeavours to establish the autonomy of the political—where the political is free from interference from other domains—it is argued that his account of the political is highly dependent on the state. More critically, Schmitt's depiction of the political as autonomous is a strategic manoeuvre to establish the autonomy of the domain of the political vis-à-vis other conceptual domains.  相似文献   
102.
The aim of the paper is to summarise the present state of knowledge concerning bitumen trade in the Near East from the Palaeolithic (70,000 BP) to the Early Islamic period. During the Palaeolithic and Early Neolithic period, bitumen utilisation was mostly concentrated in settlements close to oil seeps. From the Ubaid 3 period, bitumen from the Mosul area became more important and was traded as far as the southern Persian Gulf. The Uruk period is a turning point for Mesopotamian history as settlements evolved into city‐states. These cities had a great need for raw materials, and this marks the beginning of large‐scale exploitation of Hit bitumen. This bitumen was traded at settlements along the Euphrates, where a large trade network was established. Hit bitumen entered the Persian Gulf at the turn of the second millennium (Dilmun period). Bitumen from Iraq (Mosul and Hit) became predominantly used in most settlements along the southern coast of the Gulf. During this period Iranian bitumen was also exported and this supply tended to increase, especially during the Partho‐Sasanian period. Dead Sea bitumen had its own exchange network, which was concentrated across present‐day Israel and Egypt where it was extensively used for mummification.  相似文献   
103.
Foster, Mary Lecron, and Robert A. Rubinstein, eds. Peace and War: Cross‐Cultural Perspectives. New Brunswick, New Jersey: Transaction Books, 1986. vii + 369 pp. including chapter references and index. $29.95 cloth, $16.95 paper.

Mann, Michael. The Sources of Social Power: Volume I: A History of Power from the Beginning to A.D. 1760. Cambridge: Cambridge University Press, 1986. v + 549 pp. including chapter bibliographies and index. $59.50 cloth, $18.95 paper.

Shamgar‐Handelman, Lea. Israeli War Widows: Beyond the Glory of Heroism. South Hadley, Massachusetts: Bergin and Garvey, 1986. vii + 219 pp. including index, appendices, chapter notes, and references. $29.95 cloth.  相似文献   
104.
Campanile rupicolum sp. nov. is described from the early Miocene Upper Maude Limestone Member of Maude, Victoria. The genus has not hitherto been recorded from Victoria, a part of the Southeast Australian biogeographic Province, and was thought to be characteristic of the Austral-Indopacific Province. This is the oldest occurrence of the genus so far recorded from Australia.  相似文献   
105.
The youngest members of the Ektopodontidae, an enigmatic family of Phalangeroidea, are reported from southwestern Victoria. Four isolated teeth are described as Ektopodon paucicristata sp. nov. (from the ?mid-?late Pliocene, and early Pliocene) and two isolated Pleistocene teeth are assigned to Darcius duggani Rich, 1986. Previously, the youngest known ektopodontid was early Pliocene.  相似文献   
106.

The paper analyses the gradual changes in assistance offered to widows and widowers between 1900 and 1964. It highlights the conflicts between the principle of the family as provider of welfare and the principle of self-help embodied in poor relief, in varying municipal pensions during the inter-war period and in the right to economic assistance legitimised through the Mothers' and Widows' Pension Act in 1964. The development is seen as part of the construction of a welfare society, built on the perception of men as wage-earners and providers, women as wives and mothers. These perceptions of masculinity and femininity resulted in gender-differentiated needs in the case of widowhood, and in gender-differentiated means of covering such needs. Civil status had no importance for men's role as wage-earners, while it was decisive for the economic situation of women. Focusing on the problem of economic support, the paper discusses solutions at the individual private level, at the municipal level and at the national level. The different weighting of widows as mothers or as providers is taken into consideration, and so are consequences of demographic changes in the widowed population.  相似文献   
107.
108.
Permanent ground deformation (PGD) is one of the most damaging hazards for continuous buried lifelines. This hazard is especially severe when the PGD results in net compression in the pipe. In that case, buckling of pipe material can occur. If buckling is moderate, deformation of the pipe cross-section can lead to flow restriction and high friction losses, and eventually require line replacement. If buckling is severe, high localized strains can lead to pipe rupture, loss of contents, and possible pollution of surrounding soil. In this article, centrifuge tests of buried pipelines subject to abrupt ground failure in the form of surface faulting are presented. The fault movement results in mostly compression in the pipe. The test results are compared with a case history of pipe failure in the 1999 Izmit, Turkey earthquake and also with the results from the centrifuge tests which result in net tension in the pipe. The experimental setup, procedures, and instrumentation are described in detail. Suggestions for design practice are offered based on the analysis of results from both the 1999 Izmit case history and the centrifuge modeling.  相似文献   
109.
110.
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