全文获取类型
收费全文 | 696篇 |
免费 | 0篇 |
专业分类
696篇 |
出版年
2021年 | 8篇 |
2019年 | 15篇 |
2018年 | 10篇 |
2017年 | 15篇 |
2016年 | 12篇 |
2015年 | 13篇 |
2013年 | 133篇 |
2011年 | 6篇 |
2010年 | 8篇 |
2008年 | 6篇 |
2007年 | 9篇 |
2006年 | 9篇 |
2005年 | 15篇 |
2004年 | 10篇 |
2003年 | 8篇 |
2000年 | 11篇 |
1999年 | 8篇 |
1998年 | 5篇 |
1997年 | 9篇 |
1996年 | 16篇 |
1995年 | 9篇 |
1994年 | 15篇 |
1993年 | 8篇 |
1992年 | 10篇 |
1991年 | 18篇 |
1990年 | 10篇 |
1989年 | 17篇 |
1988年 | 11篇 |
1987年 | 15篇 |
1986年 | 16篇 |
1985年 | 14篇 |
1984年 | 10篇 |
1983年 | 10篇 |
1982年 | 14篇 |
1981年 | 9篇 |
1980年 | 14篇 |
1979年 | 9篇 |
1978年 | 10篇 |
1977年 | 10篇 |
1976年 | 10篇 |
1975年 | 9篇 |
1974年 | 15篇 |
1973年 | 13篇 |
1972年 | 14篇 |
1971年 | 19篇 |
1970年 | 6篇 |
1969年 | 10篇 |
1968年 | 7篇 |
1967年 | 5篇 |
1948年 | 5篇 |
排序方式: 共有696条查询结果,搜索用时 0 毫秒
631.
632.
Neal A. Pollard 《Low Intensity Conflict & Law Enforcement》2002,11(2):210-238
The international system has great difficulty in dealing with illegitimate non-state actors such as transnational terrorist groups and organized crime syndicates. This is due to two main factors: the quality and quantity of influence these illegitimate actors have obtained in an era of globalization, and the fact that international law considers only individual criminals and terrorists as subjects, rather than the entire illegitimate enterprise, and does not adequately link individuals, enterprises and states to more nuanced and complex forms of sponsorship of illegal activities. This work offers an outline for tools that should be embedded in the fabric of international law and agreements, to sustain credibility against illegal non-state actors, to hold accountable sponsors of illegality and to reinforce the legitimacy of globalization. 相似文献
633.
Gregory A. Daddis 《战略研究杂志》2013,36(3):357-384
This article examines the relationship between the White House and the US Military Assistance Command, Vietnam (MACV) during President Richard M. Nixon's administration. It argues that dysfunctional civil-military relations between 1969 and 1972 undermined the implementation of a sound military strategy during the United States' withdrawal from South Vietnam as Nixon attempted to achieve ‘peace with honor’ during the Vietnam War's final campaigns. By 1972, the relationship between the White House and MACV headquarters had reached the nadir of civil-military relations during the Southeast Asian conflict and had served to undercut the United States' ability to effectively disengage from a long and bitterly contested war. 相似文献
634.
In the aftermath of September 11, 2001 and Hurricane Katrina, the United States government has spent tens of billions of dollars to improve the nation's ability to respond to a natural disaster or terrorist attack, but the emphasis on immediate first response has left many long-term environmental, political, and technological challenges unaddressed. Although a dirty bomb attack is unlikely to yield the same amount of physical devastation and death as caused by Katrina or a nuclear weapon, the social, psychological, and economic impact would be enormous. At present, however, the United States lacks the technology necessary to decontaminate a large, densely populated urban area under time, political, and economic constraints. This article reviews past cleanup experiences and current decontamination capabilities to consider the long-term implications of a dirty bomb, identifies weaknesses in America's existing response capabilities, notes possible areas of political friction, and considers the implications of the failure to adequately prepare. Having the appropriate decontamination techniques established and long-term plans in place before an incident occurs will significantly improve the government's ability to protect public and environmental security, establish a viable decontamination strategy, allow residents to return to their homes, and get the local economy back on its feet. 相似文献
635.
Some have argued that the transatlantic rancor over the Iraq war made cooperation, especially on nonproliferation, unlikely. In contrast, this article, documents post-invasion instances of nonproliferation cooperation, with particular emphasis on the Proliferation Security Initiative and the EU-3 Initiative—the British, French, and German negotiations with Iran over its suspected nuclear activities. In addition to documenting French and British participation in these initiatives, the article analyzes why they have chosen to participate and argues that France and Britain have participated in both efforts because they are committed to avoiding future Iraq-like preventive wars. 相似文献
636.
Lewis A. Dunn 《The Nonproliferation Review》2013,20(2):143-172
This article assesses the successes and failures of the Treaty on the Non-Proliferation of Nuclear Weapons (NPT) since its creation in 1968 by developing and applying a set of “metrics” to each of the NPT's substantive articles as well as to its withdrawal provisions. In light of this analysis, the article also puts forward some specific proposals for strengthening the NPT and its implementation, with a view to the debate and decisions at the upcoming 2010 NPT Review Conference. A concluding section turns explicitly to the 2010 NPT Review Conference and proposes pursuit of agreement on three NPT Action Plans: one for nonproliferation, one for peaceful uses, and one for nuclear disarmament. Combining vision and practicable steps, these Action Plans would set out a roadmap for action between the 2010 and the 2015 NPT Review Conferences. They could provide a foundation for substantive exchanges—in this case, on progress toward their implementation—during the preparations for the 2015 conference. 相似文献
637.
638.
639.
We present a branch‐and‐price technique for optimal staff scheduling with multiple rest breaks, meal break, and break windows. We devise and implement specialized branching rules suitable for solving the set covering type formulation implicitly, using column generation. Our methodology is more widely applicable and computationally superior to the alternative methods in the literature. We tested our methodology on 365 test problems involving between 1728 and 86400 shift variations, and 20 demand patterns. In a direct comparison with an alternative method, our approach yields significant improvements both in cpu time and in the number of problem instances solved to optimality. The improvements were particularly marked for problems involving larger numbers of feasible shifts. © 2000 John Wiley & Sons, Inc. Naval Research Logistics 47: 185–200, 2000 相似文献
640.
潜在故障状态可测的一种故障检查模型 总被引:1,自引:0,他引:1
从系统的功能故障状态和潜在故障状态两方面讨论了故障检查模型,基于延迟时间模型推导了系统的期望可用度模型并对其适用性进行了讨论与验证。 相似文献