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   83篇
  免费   3篇
  国内免费   6篇
  2022年   1篇
  2021年   3篇
  2020年   1篇
  2019年   4篇
  2018年   3篇
  2017年   9篇
  2016年   13篇
  2015年   4篇
  2014年   10篇
  2013年   23篇
  2012年   5篇
  2011年   1篇
  2010年   3篇
  2009年   1篇
  2008年   2篇
  2006年   2篇
  2004年   1篇
  2002年   1篇
  2000年   3篇
  1999年   2篇
排序方式: 共有92条查询结果,搜索用时 15 毫秒
71.
The study of the cinematic representation is extremely useful in framing of counter-terrorism policies, whether in the US or elsewhere. This paper examines cinema’s interest in drone warfare as well as the lives and personalities of drone pilots. It argues that drone warfare suffers a considerable image problem that has been brought out in several recent features and it is unlikely that any major cinematic myth of drone warfare will easily develop, certainly in comparison to myths concerning special forces and special operations.  相似文献   
72.
讨论一类二阶微分方程x¨+εf(x,x.)x.+g(x)=0的Poincar分岔极限环的不存在性,利用一阶Mel’nikov函数直接从整体上进行分析讨论,得出了若干充分条件和判别准则。  相似文献   
73.
通过模拟实验,研究了磁隐身坦克的核心元件——同轴密绕消磁线圈的使用性能。实验室对其消磁效应的数据分析表明:同轴密绕消磁线圈能够消除坦克周围因被地磁场磁化而产生的磁场标志,其中近轴区域的消磁效果更为明显;如果在消磁线圈中通入反向电流,消磁物体的磁场反而会增强,呈缓慢磁化的趋势,这与电磁场理论相符。本实验设计的消磁线圈属于一种新功能的电磁装甲,能提高坦克在电磁战中的生存能力。  相似文献   
74.
寒山子的三百多首诗歌,内容复杂,风格多样,较难从整体上把握。结合寒山子的身世,通过对三个时期较有代表性的诗歌作简单分析,阐明其各个时期的处世哲学和信仰转变带来的诗歌艺术特色和风格的不同,以期从整体上把握寒山诗。  相似文献   
75.
针对美国国家导弹防御系统NMD(nationalmissiledefence)的发展现状,重点分析了NMD作战管理系统模型的行为过程以及与其它系统模型的接口关系,设计了作战管理系统的模型体系框架,提出了将系统的行为过程描述和功能描述相分离的建模思路。  相似文献   
76.
Abstract

Previous research has identified a variety of general mechanisms to explain how insurgents build legitimacy. Yet, there is often a gap between these mechanisms and the interactional dynamics of insurgencies. This article attempts to bridge this gap through a theoretically informed analysis of the Kurdistan Workers’ Party’s (PKK) insurgency in Turkey. I show how the PKK’s efforts to cultivate legitimacy, Turkey’s counterinsurgency strategies, and civilian perceptions of the PKK, all mutually influenced one another. Based on this analysis, I argue that the mechanisms that produce popular legitimacy coevolve with insurgents’ behaviors, states’ interventions, and civilians’ perceptions.  相似文献   
77.
Foreign policy program transfer, the shifting of implementation responsibility for a foreign policy program from one organization to another, is a ubiquitous, yet under-studied, counterinsurgency phenomenon. This article conceptually develops program transfer as an important object of study; analyzes, using archival sources, an empirical case of program transfer, Operation Switchback, drawn from US counterinsurgency practice in South Vietnam; and formulates two preliminary theoretical claims related to program transfer: (1) transferred programs will tend to be altered in accordance with the characteristics of the gaining organization, and (2) program transfer may act as a signal or early-warning indicator of foreign policy change.  相似文献   
78.
A key organizational challenge for all modern militaries is instituting an effective command-and-control (C2) structure for joint operations. China has been a relative latecomer to joint operations, with a persistent weakness in joint C2. Reforms launched in early 2016 sought to overcome this challenge by establishing a permanent two-level joint C2 structure. Although not a ‘tipping point’ that will lead ineluctably to stronger operational effectiveness, this reform is nonetheless an important milestone in an evolutionary process towards better PLA joint operations. The result could be added operational challenges for several of China’s neighbors and the United States.  相似文献   
79.
When the US Air Force set out to acquire a new aerial tanker (the KC-X), two highly suitable alternatives were offered. What could have been a short and simple source selection turned into a prolonged embarrassment. The original selection of 100 leased KC-767s was made in May 2003. But the KC-46 is expected to be operational in 2017 – more than a decade later. Our primary purpose here is to narrate and explain key events in the KC-X program. We search for useful paradigms, based in part on the US Government being better viewed as a quarrelsome committee than a monopsonist. In addition, we consider what this case might tell us about the US defense acquisition system.  相似文献   
80.
利用TRNSYS软件对重庆夏季建筑屋顶太阳能光电热一体化系统进行瞬态模拟分析计算,得到系统瞬时发电量与一段时间内累计发电量,光电热模块瞬时进出水温度与太阳能平板集热器瞬时进出水温度,系统一段时间内光电热模块累计有效得热量与一段时间内太阳能平板集热器累计有效得热量,系统的光电转换效率、光热转换效率以及太阳能综合利用效率。结果表明,建筑屋顶太阳能光电热一体化系统是重庆地区建筑太阳能光电热一体化系统适宜的型式。  相似文献   
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