全文获取类型
收费全文 | 425篇 |
免费 | 13篇 |
出版年
2021年 | 11篇 |
2019年 | 10篇 |
2017年 | 10篇 |
2016年 | 13篇 |
2015年 | 13篇 |
2014年 | 8篇 |
2013年 | 83篇 |
2011年 | 4篇 |
2008年 | 7篇 |
2007年 | 5篇 |
2006年 | 7篇 |
2005年 | 7篇 |
2004年 | 4篇 |
2002年 | 7篇 |
2001年 | 7篇 |
2000年 | 5篇 |
1999年 | 4篇 |
1998年 | 8篇 |
1997年 | 9篇 |
1996年 | 5篇 |
1995年 | 6篇 |
1994年 | 8篇 |
1993年 | 7篇 |
1992年 | 7篇 |
1991年 | 8篇 |
1990年 | 2篇 |
1989年 | 7篇 |
1988年 | 15篇 |
1987年 | 7篇 |
1986年 | 16篇 |
1985年 | 9篇 |
1984年 | 6篇 |
1983年 | 6篇 |
1982年 | 4篇 |
1981年 | 8篇 |
1980年 | 6篇 |
1979年 | 11篇 |
1978年 | 7篇 |
1977年 | 8篇 |
1976年 | 2篇 |
1975年 | 9篇 |
1974年 | 7篇 |
1973年 | 5篇 |
1972年 | 7篇 |
1971年 | 4篇 |
1970年 | 4篇 |
1969年 | 6篇 |
1968年 | 3篇 |
1967年 | 2篇 |
1966年 | 3篇 |
排序方式: 共有438条查询结果,搜索用时 15 毫秒
191.
On-site verification of ICBMs in the context of an arms control agreement might involve a situation where an inspector would choose one or more of a number of identical areas to inspect and would have confidence that the other areas had the same characteristics. This article considers optimal attack and defense of missiles deceptively based in a number of identical areas. The attacker may allocate warheads across areas as he desires and uniformly within areas. The defender may allocate interceptors across areas as he desires and either uniformly or preferentially within areas. The effect of restricting the defender to uniform allocation across areas is explored for various assumptions. Robustness of surviving missiles with respect to the number of attacking warheads is studied. Results are presented for a wide range of cases. 相似文献
192.
A framework involving independent competing risks permits observing failures due to a specific cause and failures due to a competing cause, which constitute survival times from the cause of primary interest. Is observing more failures more informative than observing survivals? Intuitively, due to the definitiveness of failures, the answer seems to be the former. However, it has been shown before that this intuition holds when estimating the mean but not the failure rate of the exponential model with a gamma prior distribution for the failure rate. In this article, we address this question at a more general level. We show that for a certain class of distributions failures can be more informative than survivals for prediction of life length and vice versa for some others. We also show that for a large class of lifetime models, failure is less informative than survival for estimating the proportional hazards parameter with gamma, Jeffreys, and uniform priors. We further show that, for this class of lifetime models, on average, failure is more informative than survival for parameter estimation and for prediction. These results imply that the inferential purpose and properties of the lifetime distribution are germane for conducting life tests. © 2013 Wiley Periodicals, Inc. Naval Research Logistics, 2013 相似文献
193.
Uri Bar‐Joseph 《战略研究杂志》2013,36(3):46-66
According to common wisdom, the Golan provides Israel with an ideal platform for its warning stations as well as the best available defense line against a massive Syrian ground attack. Challenging this belief, this article compares the present situation with an alternative defined by (a) a complete Israeli withdrawal from the Golan, (b) a complete demilitarization of the evacuated territory, and (c) considerable limitations on Syrian military presence in the area between the Golan and Damascus. The article reaches two conclusions. First, that a combination of means, primarily airborne and space‐based platforms, can effectively answer Israel's northern intelligence needs. Second, the security arrangements set above, combined with recent revolutionary military technologies and its relative advantage in this domain, offer Israel an effective ‐ in some respects even a better ‐ alternative, to the present defense line. 相似文献
194.
195.
We investigate the solvability of two single‐machine scheduling problems when the objective is to identify among all job subsets with cardinality k,1≤k≤n, the one that has the minimum objective function value. For the single‐machine minimum maximum lateness problem, we conclude that the problem is solvable in O(n2) time using the proposed REMOVE algorithm. This algorithm can also be used as an alternative to Moore's algorithm to solve the minimum number of tardy jobs problem by actually solving the hierarchical problem in which the objective is to minimize the maximum lateness subject to the minimum number of tardy jobs. We then show that the REMOVE algorithm cannot be used to solve the general case of the single‐machine total‐weighted completion time problem; we derive sufficient conditions among the job parameters so that the total weighted completion time problem becomes solvable in O(n2) time. © 2013 Wiley Periodicals, Inc. Naval Research Logistics 60: 449–453, 2013 相似文献
196.
197.
198.
Jason S. Ridler 《Small Wars & Insurgencies》2013,24(2):292-312
Charles Ted Rutledge Bohannan (1914–1982) became an integral agent of US counterinsurgency operations during the early Cold War, contributing to both the success of the COIN effort to defeat the communist Huk insurgents in the Philippines and the stalled COIN efforts in Vietnam. In the early 1960s, he wrote a short and compact analysis of the US and Filipino experience of guerrilla warfare, from the Philippine–American war until the defeat of the Huk Rebellion. It was never published. Reprinted here, Bohannan's analysis of lessons learned makes a substantial contribution to the history of American ideas of unconventional warfare by an expert who contributed these lessons to the successful defeat of an insurgency in South East Asia. 相似文献
199.
James S Corum 《战略研究杂志》2013,36(1):89-113
Rearming Germany was a long and complicated process. It was especially difficult to create a new German air force. The army generals who dominated the Bundeswehr cadre did not even want an air force but rather a small arm air corps. Moreover, Adenauer's defense staff failed to adequately budget or plan for a new air force. As rearmament began, US Air Force leaders, working closely with the small Luftwaffe staff in West Germany's shadow Defense Ministry, basically took charge of the process to ensure that the Germans built a new Luftwaffe on the American model – a large, multipurpose force organized as an independent service and fully integrated into NATO. The first Bundesluftwaffe commanders allied themselves to the Americans, often in opposition to their army comrades, to overcome the political problems caused by Adenauer's poor defense planning and create a modern air force on American lines. 相似文献
200.
Matthew S. Seligmann 《战略研究杂志》2013,36(3):454-479
In the 1990s no-fly zones were introduced as a new way to utilize airpower in the context of Peace Support Operations (PSOs). During that time, they were put to use over Iraq and over Bosnia. However, it is unclear to what extent the no-fly zones were successful in those two instances. This article examines the capabilities of no-fly zones and analyzes the Iraq and Bosnia cases of enforcement. It concludes that no-fly zones can be very effective if properly implemented and offers guidance for policy-makers on how to achieve maximum efficacy. 相似文献