全文获取类型
收费全文 | 3488篇 |
免费 | 604篇 |
国内免费 | 386篇 |
出版年
2024年 | 7篇 |
2023年 | 14篇 |
2022年 | 22篇 |
2021年 | 66篇 |
2020年 | 63篇 |
2019年 | 67篇 |
2018年 | 69篇 |
2017年 | 167篇 |
2016年 | 194篇 |
2015年 | 103篇 |
2014年 | 273篇 |
2013年 | 227篇 |
2012年 | 237篇 |
2011年 | 254篇 |
2010年 | 181篇 |
2009年 | 266篇 |
2008年 | 226篇 |
2007年 | 215篇 |
2006年 | 265篇 |
2005年 | 240篇 |
2004年 | 222篇 |
2003年 | 147篇 |
2002年 | 128篇 |
2001年 | 133篇 |
2000年 | 96篇 |
1999年 | 99篇 |
1998年 | 91篇 |
1997年 | 70篇 |
1996年 | 57篇 |
1995年 | 56篇 |
1994年 | 57篇 |
1993年 | 40篇 |
1992年 | 46篇 |
1991年 | 39篇 |
1990年 | 24篇 |
1989年 | 13篇 |
1988年 | 3篇 |
1987年 | 1篇 |
排序方式: 共有4478条查询结果,搜索用时 15 毫秒
361.
Thomas Waldman 《Defence Studies》2019,19(1):85-105
This paper explores the notion that US efforts to evade the political costs of war paradoxically contribute to the subsequent exacerbation of costs over time. Leaders seek to purchase political capital in the short term by limiting the costs and requirements of military operations, but in doing so cause strategic and political liabilities to mount in the long run. While identification of such behaviour is not new, insufficient attention has been devoted to explaining its causes, dynamics, and manifestations in relation to key decisions on and in war. Evidence derived from studies of recent American discretionary campaigns is analysed to advance an argument with respect to this pattern of self-defeating strategic behaviour. 相似文献
362.
The Anglo-American military relationship is a vital yet neglected area of study. This article argues that the British military have actively cultivated a relationship with the U.S. military that has contributed to the longevity of the broader so-called “Special Relationship,” even in the Trump era. The article contends that the complexities of the military relationship can best be captured by the theoretical lens provided by Lowndes and Roberts that combines different strands of institutionalism to focus on rules, practices, and narratives. The intense linkages between the United States and United Kingdom have become routinized, enabling them to adapt their peacetime cooperation to conflicts, and thereby address post-Cold War security challenges. The article draws upon semi-structured interviews with senior British military officers as well as policy documents to explore how these patterns of collaboration have become ingrained in patterns of both thinking and behavior. 相似文献
363.
364.
365.
This paper investigates the relationship between military expenditure and FDI inflow conditioning on the exposure of a country to armed conflict in the long run. We apply the band spectrum regression estimator, and the maximal overlap discrete wavelet transform, to a panel of 60 developing countries, for the years 1990 to 2013. The estimated results indicate that military expenditure, in the absence of armed conflict, reduces FDI inflow. However, the negative effect is mitigated by increased military expenditure, in the presence of armed conflict. We also show that the effect of military expenditure on FDI is time sensitive, in that it takes time for military expenditure to affect FDI inflow. FDI inflow in response to higher military expenditure is higher for the country that faces higher armed conflict than the country that faces lower armed conflict. The findings are robust in the case of overall as well as internal conflict. These results are also robust to the alternative specification, subsample analysis with different armed conflict thresholds, and the estimation using the time variant long-run models. 相似文献
366.
367.
368.
369.
地面战场侦察传感器系统的发展状况及技术分析 总被引:4,自引:0,他引:4
主要介绍了国内外地面战场侦察传感器系统的主要用途、基本组成和分类,对其未来发展趋势进行了分析,根据我军地面战场侦察传感器系统的技术现状提出了需要解决的关键问题。 相似文献
370.
分析了硬、软系统方法应用的异同点,研究了将硬、软系统方法整合起来处理通用装备供应系统设计的问题,最后提出了系统设计的框架。 相似文献