全文获取类型
收费全文 | 312篇 |
免费 | 6篇 |
出版年
2021年 | 5篇 |
2020年 | 5篇 |
2019年 | 9篇 |
2018年 | 5篇 |
2017年 | 6篇 |
2015年 | 5篇 |
2014年 | 5篇 |
2013年 | 57篇 |
2010年 | 4篇 |
2009年 | 3篇 |
2008年 | 6篇 |
2005年 | 2篇 |
2004年 | 5篇 |
2003年 | 6篇 |
2002年 | 3篇 |
2001年 | 5篇 |
2000年 | 4篇 |
1998年 | 6篇 |
1997年 | 4篇 |
1996年 | 9篇 |
1995年 | 4篇 |
1994年 | 2篇 |
1993年 | 4篇 |
1992年 | 5篇 |
1991年 | 8篇 |
1990年 | 5篇 |
1989年 | 8篇 |
1988年 | 8篇 |
1987年 | 7篇 |
1986年 | 7篇 |
1985年 | 6篇 |
1984年 | 6篇 |
1983年 | 2篇 |
1982年 | 4篇 |
1981年 | 5篇 |
1980年 | 10篇 |
1979年 | 4篇 |
1978年 | 6篇 |
1977年 | 4篇 |
1976年 | 5篇 |
1975年 | 6篇 |
1974年 | 4篇 |
1973年 | 2篇 |
1972年 | 3篇 |
1971年 | 8篇 |
1970年 | 4篇 |
1969年 | 4篇 |
1968年 | 5篇 |
1967年 | 4篇 |
1966年 | 6篇 |
排序方式: 共有318条查询结果,搜索用时 15 毫秒
171.
The article presents problems related to mechanical protection of vehicles with different add-on armours against chemical,biological and radiological contamination.This applies to vehicles with additional passive,reactive and hybrid protection in the form of cassettes against piercing with anti-tank pro-jectiles,piercing with their kinetic energy of impact,and as a result of chemical energy of shaped charges as well as explosively formed projectiles.It has been shown how increased ballistic protection of these vehicles at the same time reduces their decontaminability in various places of the vehicle due to the increased additional surface of the vehicle with cassettes.Prevention of contamination of these cassettes has been presented as a way of reducing hard to reach surface for decontamination and a method of insulating construction elements(stands),fixing these cassettes to the vehicle,from the environment to prevent contact with contaminated liquids and dusts.The selection of appropriate materials is shown,which may affect the improvement of the decontamination efficiency of the vehicle with such cassettes.This applies to the use of materials with low absorption of chemical warfare agents,which prevent the accumulation of large amounts of these agents on contaminated surfaces and improve the effectiveness of decontamination.It also shows how to ensure better access of the disinfectant to as much of the vehicle surface as possible,covered with cassettes that have been contaminated.It shows how a vehicle,in particular with such cassettes,can provide protection against radar detection when Radar Absorbent Material is used on vehicle cassettes. 相似文献
172.
Since 2012, China’s assertion of its sovereignty claim to the contested Senkaku/Diaoyu Islands has significantly raised the risk of a potentially escalatory political-military crisis with Japan. As circumstances worsen, Japanese Prime Minister Shinzo Abe has championed major institutional reforms aimed at centralizing Japanese security policy decision-making and vastly improving crisis management. This article assesses these reforms’ significance for ameliorating Japan’s long-standing internal crisis management weaknesses, and enhancing its ability to communicate with Beijing promptly under challenging conditions. While significant issues remain, recent developments – especially the establishment of Japan’s first-ever National Security Council – demonstrate significant progress. Bilaterally, however, important firebreaks remain conspicuously absent. 相似文献
173.
Brett D. Weigle 《Journal of Military Ethics》2017,16(1-2):94-113
Readers of reports on ethical failures by four-star general officers must wonder, “Don’t they have staffs to ensure that the general follows ethics rules?” The Department of Defense publishes robust ethics guidance in several documents; however, a staff’s best efforts to implement this guidance may fail to make an impression on a senior leader who is susceptible to the “Bathsheba syndrome,” an allusion to the biblical account where the prophet Nathan rebuked King David for his moral failings. This paper proposes a methodology to enable senior headquarters staffs to play the role of Nathan in supporting ethical behaviors by high-level officers. It examines the mechanisms that embed ethical behavior within members of those staffs in carrying out their three principal roles of advising, scheduling, and transporting the four-star officer. The authors offer a framework based on an ethical infrastructure of organizational climate that focuses the staff’s daily efforts to mitigate risk across seven ethical “danger areas” that threaten ethical failures by senior officers. 相似文献
174.
Under various operational conditions, in particular in operations other than war (OOTW) or peacekeeping, an intervening force, here Blue, must occasionally engage in attrition warfare with an opposing force, here Red, that is intermingled with noncombatants. Desirably, Red armed actives are targeted, and not the unarmed noncombatants. This article describes some simple Lanchesterian attrition models that reflect a certain capacity of Blue to discriminate noncombatants from armed and active Red opponents. An explicit extension of the Lanchester square law results: Blue's abstinence concerning the indiscriminate shooting of civilians mixed with Red's is essentially reflected in a lower Blue rate of fire and less advantageous exchange rate. The model applies to other situations involving decoys, and reflects the value of a discrimination capability. © 1997 John Wiley & Sons, Inc. Naval Research Logistics 44 : 507–514, 1997 相似文献
175.
A new piece of equipment has been purchased in a lot of size m. Some of the items can be used in destructive testing before the item is put into use. Testing uncovers faults which can be removed from the remaining pieces of equipment in the lot. If t < m pieces of equipment are tested, then those that remain, m1 = m − t, have reduced fault incidence and are more reliable than initially, but m1 may be too small to be useful, or than is desirable. In this paper models are studied to address this question: given the lot size m, how to optimize by choice of t the effectiveness of the pieces of equipment remaining after the test. The models used are simplistic and illustrative; they can be straightforwardly improved. © 1997 John Wiley & Sons, Inc. Naval Research Logistics 44: 623–637, 1997 相似文献
176.
Many attempts have been made in the past to obtain estimates for the weights and ratings values of a multicriteria linear utility function. In particular, the problem arises when both criteria importance and alternatives' ratings are expressed in a qualitative ordinal manner. This article proposes an extreme-point approach for obtaining the overall ratings in the presence of ordinal preferences both for the criteria importance and the alternatives' rankings. In particular it is shown that Borda's method of scores is obtained as a special case. © 1996 John Wiley & Sons, Inc. 相似文献
177.
K. D. Glazebrook 《海军后勤学研究》1995,42(6):993-1005
A general class of single machine stochastic scheduling problems incorporating precedence constraints is modelled as a family of competing Markov decision processes. A bound on the optimal return yields a suboptimality bound for permutation policies. This in turn leads to a generalised “used better than new” principle as a (highly intuitive) sufficient condition for the optimality of a permutation policy in the class of all (preemptive) policies. © 1995 John Wiley & Sons, Inc. 相似文献
178.
Boghos D. Sivazlian 《海军后勤学研究》1989,36(2):127-137
A mathematical model describing the sortie of a single aircraft under enemy threats, attacking a single passive target, is developed. Emphasis is placed on the determination of the probabilities associated with the various events in the sortie. These probabilities are then used to derive appropriate measures of effectiveness. The optimum sortie time is analyzed. 相似文献
179.
Gregory D. Koblentz 《战略研究杂志》2018,41(3):372-409
The discovery that Iraq had no weapons of mass destruction (WMD) in 2003 raised the question of why Saddam had prevented UN weapons inspectors from fully accounting for his disarmament. The leading explanation for Saddam’s behavior is that he valued ambiguity as part of a strategy of ‘deterrence by doubt’. This article argues that Iraq’s obstruction of inspectors in the late 1990s was motivated by his desire to shield Iraq’s regime security apparatus from UNSCOM’s intrusive counter-concealment inspections. The failure to understand how strongly Saddam’s concerns about his personal safety drove Iraq’s contentious relationship with UNSCOM set the stage for the invasion of Iraq in 2003. 相似文献
180.
Colin D. Robinson 《Defense & Security Analysis》2018,34(3):249-266
ABSTRACTThis author wrote his doctorate thesis on post-conflict army reconstruction, submitting it in 2011. Continued research on the subject in the intervening seven years indicates that his theoretical propositions can be refined and improved. This article examines refinements to the model, and then applies those refinements in detail to the Afghan case. In so doing, it shifts the focus from potentially altruistic state-building to a case that was driven by pure national-strategic interests. Issues surrounding the liberal peace ideology dominate recent army reconstruction in conflict-affected states. The liberal peace underpinning is of supreme importance, so much so that in many discussions, it is internalised and accepted virtually without thought. This paper will advance the body of knowledge by establishing, for the first time, a theoretical basis for the widespread failure of army reconstruction in Afghanistan. The empirical basis builds on extensive previous research by other scholars. The resulting model can also be applied to better explain outcomes in other similar cases. 相似文献