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   3117篇
  免费   73篇
  国内免费   1篇
  2021年   38篇
  2019年   88篇
  2018年   51篇
  2017年   80篇
  2016年   78篇
  2015年   61篇
  2014年   65篇
  2013年   704篇
  2011年   25篇
  2010年   35篇
  2009年   39篇
  2008年   50篇
  2007年   52篇
  2006年   36篇
  2005年   43篇
  2004年   58篇
  2003年   42篇
  2002年   57篇
  2001年   32篇
  2000年   32篇
  1999年   41篇
  1998年   46篇
  1997年   48篇
  1996年   61篇
  1995年   41篇
  1994年   60篇
  1993年   63篇
  1991年   34篇
  1989年   31篇
  1986年   72篇
  1985年   68篇
  1984年   36篇
  1983年   42篇
  1982年   43篇
  1981年   45篇
  1980年   51篇
  1979年   45篇
  1978年   49篇
  1977年   46篇
  1976年   45篇
  1975年   46篇
  1974年   52篇
  1973年   50篇
  1972年   52篇
  1971年   43篇
  1970年   40篇
  1969年   40篇
  1968年   34篇
  1967年   33篇
  1966年   27篇
排序方式: 共有3191条查询结果,搜索用时 31 毫秒
981.
On Nuclear Terrorism, by Michael Levi. Harvard University Press, 2007. 210 pages, $24.95.  相似文献   
982.
Export controls and international safeguards are central to ensuring international confidence in the peaceful uses of nuclear materials and technologies and to achieving adequate oversight on the transfer and use of nuclear materials, technology, and equipment required for the development of proliferation-sensitive parts of the nuclear fuel cycle. Although the independent strengths of export controls and international safeguards rely largely on universal adherence, there may be opportunities to exploit the shared strengths of these systems. This article provides background information on the separate evolution of export controls and international safeguards, considers how these two elements of the nonproliferation regime interact, and identifies some possible avenues that could, over time, lead to wholly integrated activities.  相似文献   
983.
The Sixth Review Conference of the Biological Weapons Convention (BWC) gave the future of biological disarmament new hope. It brought the BWC back closer to the core of multilateral efforts to combat the weaponization of disease, agreed to an intersessional work program for 2007–2010, created an implementation support unit, and revived the interrupted process of BWC evolution through extended understandings agreed at review conferences. However, its aims were deliberately modest. Having set their sights realistically low, delegations did not have to lower them much further. What was most important was to prevent U.S.-Iranian acrimony from paralyzing the conference. With deadlock once again narrowly averted, the conference had to clear away the debris left from past dissensions in order to open the way to constructive evolution for the treaty. In particular the conference avoided contentious subjects such as permanent organization and verification measures for the BWC; its institutional deficit and compliance problems remain. Successes and limitations of the conference are analyzed, as is its equivocal outcome on confidence-building measures. Developing on the endogenous principle, the BWC will continue to need constant attention. At the center of a complex edifice, the BWC must be kept sound, strong, and solid.  相似文献   
984.
985.
The stage may be set for what could be a historic turning point in America's reliance on nuclear weapons to meet its fundamental national security interests. Proponents of a refurbished nuclear stockpile and infrastructure are convinced that nuclear weapons will remain central to U.S. security interests, yet they admit that there is no national consensus on the need for and role of nuclear weapons. Nuclear opponents are gravely concerned that to the extent nuclear refurbishment creates a global perception that nuclear weapons remain essential instruments, it will eviscerate nuclear nonproliferation measures precisely at a time when nuclear ambitions are growing. Moreover, opponents see deterrence through advanced conventional weapons as decisively more credible than any nuclear alternative. With hopes of elevating discourse to the national level, this article examines the key current arguments pro and con within the specialist community and forecasts changes in the U.S. nuclear arsenal over the next decade. It concludes with a brief prognosis on prospects for complete nuclear disarmament.  相似文献   
986.
987.
988.
Post-Cold War “lab-to-lab” collaborations on unclassified scientific issues between U.S. and Russian nuclear weapons laboratories set the stage for bilateral cooperation in materials control and other nuclear areas. They also became the major element in a cooperative process initiated by a Presidential Decision Directive to ensure Russia's compliance with the Comprehensive Nuclear-Test-Ban Treaty. These collaborations have always been highly favored by leaders of the Russian nuclear weapons complex—the same leaders who oversee Russia's participation in various government-to-government programs. This article reviews these collaborations and examines the possibility that U.S. rebuffs of Russian proposals and the U.S. failure to keep promises of expanded collaboration could contribute to Russia's reluctance in major programs and even lead to a return to nuclear testing by Russia. The author argues that a renewed U.S. commitment to the process should be an immediate goal of the Obama administration and is an essential step in re-engaging Russia to solve the nuclear problems remaining from the Cold War. Steps for doing so are recommended.  相似文献   
989.
For many years, non-nuclear weapons states have sought binding commitments from nuclear armed states that they would not be the victim of either the threat or use of nuclear weapons—so-called negative security assurances (NSAs). The nuclear weapon states have traditionally resisted granting such unconditional NSAs. Recent U.S. efforts to use nuclear deterrence against the acquisition and use by other states of chemical, biological and radiological weapons, however, have further exacerbated this divide. This article analyzes the historical development of NSAs and contrasts U.S. commitments not to use nuclear weapons with the empirical realities of current U.S. nuclear weapons employment doctrines. The authors conclude that NSAs are most likely to be issued as unilateral declarations and that such pledges are the worst possible manner in which to handle the issue of security assurance.  相似文献   
990.
UNDER THE RADAR?     
Missile Contagion: Cruise Missile Proliferation and the Threat to International Security, by Dennis M. Gormley. Praeger Security International, 2008. 272 pages, $54.95.  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