全文获取类型
收费全文 | 652篇 |
免费 | 32篇 |
国内免费 | 1篇 |
出版年
2021年 | 7篇 |
2019年 | 10篇 |
2018年 | 9篇 |
2017年 | 18篇 |
2016年 | 12篇 |
2015年 | 14篇 |
2014年 | 12篇 |
2013年 | 134篇 |
2011年 | 11篇 |
2010年 | 11篇 |
2009年 | 18篇 |
2008年 | 7篇 |
2007年 | 14篇 |
2006年 | 9篇 |
2005年 | 12篇 |
2004年 | 16篇 |
2003年 | 10篇 |
2002年 | 14篇 |
2001年 | 14篇 |
2000年 | 11篇 |
1999年 | 13篇 |
1998年 | 13篇 |
1997年 | 13篇 |
1996年 | 11篇 |
1995年 | 18篇 |
1994年 | 16篇 |
1993年 | 15篇 |
1992年 | 15篇 |
1991年 | 15篇 |
1990年 | 8篇 |
1989年 | 7篇 |
1988年 | 12篇 |
1987年 | 12篇 |
1985年 | 10篇 |
1984年 | 9篇 |
1983年 | 8篇 |
1982年 | 5篇 |
1981年 | 12篇 |
1980年 | 7篇 |
1979年 | 12篇 |
1978年 | 6篇 |
1977年 | 5篇 |
1976年 | 6篇 |
1975年 | 11篇 |
1974年 | 7篇 |
1973年 | 7篇 |
1972年 | 8篇 |
1971年 | 7篇 |
1968年 | 5篇 |
1967年 | 5篇 |
排序方式: 共有685条查询结果,搜索用时 15 毫秒
231.
Under the administration of President George W. Bush, Pentagon rhetoric has increasingly articulated a more robust vision of space as a future battlefield. This analysis details some of the ongoing spending for research and development programs identified in current U.S. Air Force, Missile Defense Agency (MDA), and Defense Advanced Research and Planning Agency (DARPA) planning and budget documents related to “space control” and “space force projection.” This analysis finds that current support for “space superiority” and “space control” systems remains largely rhetorical—with little actual budgetary support. Unclassified technology development programs included in the six-year Future Years Defense Plan are a decade or more away from deployment. Programs related to offensive counterspace, space-based missile defense interceptors, and space-based strike total slightly less than $300 million in FY 2006 funding. We conclude significantly higher expenditures in research and development would be required to develop and deploy killer micro satellites, space-based missile defense interceptors, and military space planes. 相似文献
232.
233.
234.
John C. Baker ? 《The Nonproliferation Review》2013,20(1):119-123
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
235.
Todd C. Robinson 《The Nonproliferation Review》2013,20(1):53-70
ABSTRACTWhat do we mean by nuclear proliferation? What does it mean to proliferate? This article investigates both the literal and figurative meaning of the term “proliferation.” It argues that many of the definitions and conceptualizations of nuclear proliferation often used by scholars are either limited in their utility or logically inconsistent. It then reconceptualizes and redefines the term, incorporating an understanding of both its etymological origins and the geopolitical context in which the phenomenon occurs. It concludes by exploring the potential impact that the politicization of the phenomenon may have on the identification of occurrences of proliferation, from both an academic and a policy-making perspective. 相似文献
236.
Michael Barletta Clay Bowen Kimber Cramer R. Adam Moody 《The Nonproliferation Review》2013,20(2):132-145
The material in this overview is drawn from selected abstracts that appear in the Center for Nonproliferation Studies’ nuclear and missile databases. Transactions of nuclear and missile technologies, parts, and materials are listed according o the recipient country. Other developments are listed according to the country where the event or development took place. 相似文献
237.
Michael Barletta Clay Bowen Kent Jamison Gaurav Kampani 《The Nonproliferation Review》2013,20(3):134-151
The material in this overview is drawn from selected abstracts that appear in the Center for Nonproliferation Studies' nuclear and missile databases. Transactions of nuclear and missile technologies, parts, and materials are listed according to the recipient country. Other developments are listed according to the country where the event or development took place. 相似文献
238.
Full‐system testing for large‐scale systems is often infeasible or very costly. Thus, when estimating system reliability, it is desirable to use a method that uses subsystem tests, which are often less expensive and more feasible. This article presents a method for bounding full‐system reliabilities based on subsystem tests and, if available, full‐system tests. The method does not require that subsystems be independent. It accounts for dependencies through the use of certain probability inequalities. The inequalities provide the basis for valid reliability calculations while not requiring independent subsystems or full‐system tests. The inequalities allow for test information on pairwise subsystem failure modes to be incorporated, thereby improving the bound on system reliability. We illustrate some of the properties of the estimates via an example application. © 2013 Wiley Periodicals, Inc. Naval Research Logistics, 2013 相似文献
239.
In Chechnya a protracted conflict only seemingly quieted down, but it still smolders and as the conflict is suppressed by coercion, it is inevitable that it will flare up at some time in the near future. The root causes of the conflict can be understood by use of globalization theory, which dialectically brings together the clashing forces from above and below. Civil society in Chechnya deteriorated, is politically curtailed, and has no resilience left. It thus results in a frozen conflict and an excluded and victimized society. Russian-style reconstruction does alleviate living conditions, but does not remediate the frozen conflict character of the present situation. The dynamics of the globalizing forces from below and above, summarized in the glocalization concept, not only explains the resistance by the Chechen people, for whom revolt, rebellion, and terrorism remain attractive options, but also serves as a model for other insurgencies. Reflecting on the two recent Chechen–Russian wars results in a paradigmatic case study. 相似文献
240.
Rudolph C. Barnes Jr. 《Small Wars & Insurgencies》2013,24(1):1-2
In 1897 and 1898, Winston Churchill participated in what late Victorian Britain termed ‘small wars’, first on India's northwest frontier and then in the vast wasteland of the Sudan. Churchill chronicled his experiences in these conflicts in personal letters, dispatches to newspapers, and in his first two books, The Story of the Malakand Field Force and The River War. These writings provide a snapshot of a particular period in the formative years of the great statesman, demonstrating through Churchill's eloquent analyses many of the contradictions concerning the conduct of small wars that have emerged in the present era. 相似文献