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   119篇
  免费   0篇
  2020年   1篇
  2019年   4篇
  2018年   6篇
  2017年   6篇
  2016年   4篇
  2015年   2篇
  2014年   3篇
  2013年   35篇
  2012年   4篇
  2009年   3篇
  2007年   2篇
  2006年   2篇
  2005年   2篇
  2004年   3篇
  2003年   3篇
  2002年   4篇
  2001年   2篇
  1999年   2篇
  1998年   1篇
  1996年   3篇
  1995年   5篇
  1994年   1篇
  1993年   1篇
  1992年   1篇
  1991年   2篇
  1989年   1篇
  1988年   3篇
  1987年   1篇
  1986年   1篇
  1985年   2篇
  1983年   1篇
  1982年   1篇
  1980年   2篇
  1979年   1篇
  1974年   1篇
  1972年   1篇
  1971年   1篇
  1968年   1篇
排序方式: 共有119条查询结果,搜索用时 15 毫秒
41.
This article is the latest in a series of published articles systematically examining Afghan Presidential and legislative elections. Structural problems including fraud, ethno-linguistic block voting, and the Single Non-Transferable Vote have had significant impacts on the development of Afghan democratic elections. The challenge now facing the current Afghan government and future elections is the daunting task of uniting the Afghan people while not repeating the electoral mistakes of the past. The tricky balancing act of fostering an overarching national identity without being perceived as privileging particular identities requires strong leadership and a willingness to challenge traditional ethnic, linguistic, and religious norms when need be. Karzai and Ghani Administrations have seriously failed relative to this dynamic.  相似文献   
42.
43.
Controversy has long surrounded the role and profitability of US defense contractors. From a financial perspective the question becomes whether defense contractors earn greater profits and investor returns than other companies during military conflicts. We explore this question by examining the accounting profitability and investor returns of US aircraft manufacturers before, during, and after World War II and compare them to a sample of non-defense firms. We also examine the reactions of aircraft stock prices to important political and military events of the time. We find that (1) aircraft stocks exhibited positive abnormal returns around events associated with defense buildups and outbreaks of hostile action and negative returns around events signaling an end to hostilities, (2) the company’s accounting returns improved during the war but these higher accounting returns did not translate into higher stock returns for the shareholders, and (3) investors could have earned higher stock returns had they switched out of aircraft stocks after Pearl Harbor and reinvested the proceeds in the overall market.  相似文献   
44.
45.
46.
47.
Asymptotic representations are found for the large deviation probabilities that the nα-th order statistic exceeds δ, where δ>α. The probabilities are first expressed in terms of the empirical distribution function, and then the 1960 theorem of Bahadur and Ranga Rao is applied. The result is then shown to be more precise than a logarithmic statement in a 1969 paper of Sievers dealing with the asymptotic relative efficiency of the sample median test.  相似文献   
48.
49.
This paper considers the problem of modeling the reliability of a repairable system or device that is experiencing reliability improvement. Such a situation arises when system failure modes are gradually being corrected by a test-fix-test-fix procedure, which may include design changes. A dynamic reliability model for this process is discussed and statistical techniques are derived for estimating the model parameters and for testing the goodness-of-fit to observed data. The reliability model analyzed was first proposed as a graphical technique known as Duane plots, but can also be viewed as a nonhomogeneous Poisson process with a particular mean value function.  相似文献   
50.

John Terraine, The Smoke and the Fire: Myths and Anti‐Myths of War 1861–1945. London: Sidgwick &; Jackson, 1980. Pp. 240; £8.95.

Stephen Roskill, Admiral of the Fleet: Earl Beatty. London: Collins,1980. Pp. 430; £12.95.

Peter and Leni Gillman, ’Collar the Lot’. How Britain Interned and Expelled its Wartime Refugees. London: Quartet Books, 1980. Pp. 314; £8.95.

Frederic A. Bergerson, The Army Gels An Air Force: Tactics of Insurgent Bureaucratic Politics. Baltimore and London: The Johns Hopkins University Press, 1980. Pp. xiii + 216; £8.50.

Christoph Bertram (ed), Prospects of Soviet Power in the 1980s. London: Macmillan, and IISS, 1980. Pp. 126; £15.

James M. Roherty (ed.), Defense Policy Formulation: Towards Comparative Analysis. Durham, NC: Carolina Academic Press, 1980. Pp. 315; $14.95.

Franklyn Griffiths and John C. Dolanyi, The Dangers of Nuclear War. Toronto: University of Toronto Press, 1979. $15.00.

Kenneth Mackenzie, Turkey under the Generals. London: Institute for the Study of Conflict, Conflict Studies. Number 126, January 1981. Pp. 31.  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