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   94篇
  免费   7篇
  国内免费   1篇
  2020年   5篇
  2019年   6篇
  2018年   6篇
  2017年   9篇
  2016年   7篇
  2015年   3篇
  2014年   13篇
  2013年   32篇
  2012年   1篇
  2011年   2篇
  2010年   3篇
  2009年   4篇
  2008年   1篇
  2006年   2篇
  2005年   1篇
  2004年   3篇
  2001年   2篇
  2000年   1篇
  1990年   1篇
排序方式: 共有102条查询结果,搜索用时 62 毫秒
11.
During the Nigerian Civil War (1967–1970), France chose to support Biafra, but only on a limited scale, providing mercenaries and obsolete weaponry to Ojukwu's regime. General Charles de Gaulle's assistance to Ojukwu was conditioned by the French military drawdown after 1961, the increased power of French secret services on the continent, and the interventions in Katanga (1960–1963), Gabon (1964) and Chad (1968–1972). France supported Biafra primarily to protect its former colonies from Nigeria, stop Soviet subversion and acquire an economic foothold in the oil-rich Niger Delta. De Gaulle chose a limited strategy for two reasons. If Biafra won the war, France would be Biafra's greatest ally. If Nigeria won the war, France could extricate itself from the situation relatively easily and re-establish relations with the Nigerian government, which is what ultimately occurred.  相似文献   
12.
Under what conditions can leaders achieve wartime political–military integration? In the Vietnam War, political–military integration exhibited dramatic variation: in the air war, the US was able to tightly integrate its political objectives and military conduct, but in the ground war, the American military prosecuted a strategy that was both divorced from broader political objectives and was immune from Washington's influence. I argue that the nature of information management between the military and civilian leadership explains the pattern of political–military integration in the Vietnam War more completely than do explanations that focus on the organizational cultures of professional militaries.  相似文献   
13.
Etzioni both exaggerates and minimizes the influence of my book Learning to Eat Soup with a Knife on different components of US military doctrine, mischaracterizes my treatment of the Malayan Emergency, and unfairly denigrates the successes of counterinsurgency in Iraq from 2007 to 2011 while misattributing the reasons for its failures in both Iraq and Afghanistan.  相似文献   
14.
ABSTRACT

Sectarian militants have for years launched attacks from Pakistan across the border to Iran. Finding sanctuary in a neighbouring country can make the difference between success and failure for militants. Conventional wisdom holds that a lasting transnational militancy challenge would typically create serious interstate conflict. Militancy has triggered armed encounters between Iran and Pakistan. This article argues that despite some tension militancy has resulted in deeper cooperation in the ambivalent dyad. Both states’ overarching security concerns, having exhausted other options, the believed involvement of third-party states, and economic potential, have moderately alleviated negative pressure caused by militancy.  相似文献   
15.
The second session of the Preparatory Committee for the 2015 Review Conference (RevCon) of the Treaty on the Non-Proliferation of Nuclear Weapons (NPT) highlighted two issues in particular—progress toward a Middle East Weapons of Mass Destruction–Free Zone and the Joint Statement on the humanitarian impact of nuclear weapons—that may not only greatly affect the health and vitality of the NPT and the 2015 RevCon, but possibly also have implications for the international nonproliferation regime as a whole. Dr. William Potter, director of the James Martin Center for Nonproliferation Studies, interviewed Ambassador Cornel Feruta, chairman of the 2013 PrepCom, to discuss these and other issues related to the meeting and the future of the treaty and its review process.  相似文献   
16.
A combination of threat analysis and “subterranean forces” (such as proclivities to fight conventional wars as compared to asymmetric ones) leads the USA to prefer focusing on the threats from China rather than those emanating from the Middle East.  相似文献   
17.
ABSTRACT

The decision by the US government to drop the atomic bombs on Japan is one of the most heavily debated questions in history. This article examines one element of that debate, in many ways the most surprising. That was the different views of the top of the military hierarchy in the USA, the Joint Chiefs of Staff (JCS). The JCS was on the whole more sceptical about using atomic weaponry than the USA’s civilian leadership, for ethical and strategic reasons. As such they were willing to consider very different ways of ending the war.  相似文献   
18.
The global financial turmoil of 2008 has resulted in the curtailment of military expenditure in most western countries. At a sub-regional-level reductions in the level of activity at a major military facility can have significant economic impact. In the light of this, the paper has two objectives: to analyse the impact of the decision to terminate naval shipbuilding at the United Kingdom’s Portsmouth Naval Base; and, for illustrative purposes, to examine the possible economic consequences of further contraction at the facility. In pursuit of these aims, it is necessary to establish the output, income and employment generated by the base using a bespoke input–output model. The methodology employed can, with appropriate adjustments, be utilised in other military or civilian contexts.  相似文献   
19.
针对探月飞行器月球公转轨道上的卫星导航定位问题,以高轨道飞行器卫星导航定位的研究为基础,采用多全球导航卫星系统联合定位的方法进行仿真。分析了载波功率与噪声功率密度比为15d BHz的弱信号捕获门限下,各系统联合定位时波束主瓣和旁瓣的可用性,同时对各系统联合情况下的精度因子值进行分析。仿真结果表明:当接收到的卫星天线辐射的主瓣和旁瓣信号均高于载噪比门限时,全球导航卫星系统的三系统或四系统的联合能满足实时定位条件;而旁瓣损耗不加以补偿时,接收信号载噪比低于门限并导致任意联合方式均无法完成定位。各系统联合的精度因子分析表明:单系统或双系统联合的几何精度因子变化剧烈,四系统联合相比三系统联合的几何精度因子下降16.93%;三系统联合定位方案中,美国全球定位系统、中国的北斗卫星导航定位系统与欧洲的伽利略卫星导航定位系统联合方案的几何精度因子值变化最平稳,为最佳选择。理论分析和仿真结果为探月飞行器定位技术研究和星载多系统接收机设计提供参考。  相似文献   
20.
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