全文获取类型
收费全文 | 398篇 |
免费 | 44篇 |
国内免费 | 70篇 |
出版年
2023年 | 3篇 |
2022年 | 4篇 |
2021年 | 11篇 |
2020年 | 11篇 |
2019年 | 24篇 |
2018年 | 12篇 |
2017年 | 22篇 |
2016年 | 23篇 |
2015年 | 10篇 |
2014年 | 46篇 |
2013年 | 44篇 |
2012年 | 21篇 |
2011年 | 28篇 |
2010年 | 16篇 |
2009年 | 29篇 |
2008年 | 30篇 |
2007年 | 31篇 |
2006年 | 25篇 |
2005年 | 30篇 |
2004年 | 27篇 |
2003年 | 11篇 |
2002年 | 8篇 |
2001年 | 7篇 |
2000年 | 11篇 |
1999年 | 6篇 |
1998年 | 6篇 |
1997年 | 3篇 |
1995年 | 4篇 |
1994年 | 4篇 |
1993年 | 2篇 |
1992年 | 2篇 |
1991年 | 1篇 |
排序方式: 共有512条查询结果,搜索用时 15 毫秒
411.
由于光纤法测量表面粗糙度易受到传感器光源、零件材料、零件加工方法和测量环境的影响,从而降低了测量的精度。针对这些影响因素进行了分析,提出了解决办法,从而提高了测量精度。 相似文献
412.
THERESEARCHANDIMPLEMENTATIONOFCOMBININGLOGICWITHOBJECTORIENTEDPARADIGMZhouLi;WuQuanyuan(DepartmentofComputerScience,NUDT,Chan... 相似文献
413.
Gjorgji Veljovski Nenad Taneski Metodija Dojchinovski 《Defense & Security Analysis》2017,33(4):292-307
The term “hybrid warfare” is a new one that the West began to use to explain its failure to cope with asymmetric threats. Focusing on the war on global terrorism, the West temporarily withdrew its attention from traditional adversaries, such as Russia, which has used this gap and has audaciously returned to the stage as a global actor. Until the Russian annexation of the Crimean Peninsula in 2014 and inflaming the Ukrainian crisis, most Western authors attributed “hybrid threats” mostly to non-state actors. But the Ukrainian scenario showed the true face of “hybridity” in the modern battlefield when practised by a powerful state actor. Russian “hybrid warfare” in Ukraine has already been seen as a combination of conventional and unconventional methods, that have been complemented with other instruments of national power – diplomatic, economic and information. The purpose of this article is, through an analysis of the Ukrainian scenario, to demonstrate that although the term “hybrid” is new, the concept itself is old and is a continuation of already seen doctrine from the Cold War era. Although “hybrid threats” can come both from state and non-state actors, the Russian interference in Ukraine is proof that they are especially dangerous for the West if, or when, they are initiated from a traditional, sophisticated adversary that has the capacity to use all forms of warfare. 相似文献
414.
Hans-Georg Ehrhart 《Defense & Security Analysis》2017,33(3):263-275
Each age has its own wars and its own forms of warfare. In today’s evolving world risk society warfare has entered a new development stage. The states of the “global North” adapt their forms of intervention. They increasingly practice postmodern warfare characterized especially by the role of influencing the information space, networked approaches, the incorporation of indirect and covert actions, and the special quality of new technologies. This practice furthers an increasing grey zone between limiting and de-bounding of warfare. The phenomenon of postmodern warfare raises some tough questions and offers a rich research agenda. 相似文献
415.
作战体系已成为制约网络舆论斗争作战效能的关键性问题。论文借鉴信息化战争的一体化联合作战思想,分析了网络舆论斗争的全域一体化联合作战特点,建立了全域一体化联合作战体系架构,为网络舆论斗争实践提供思想理论指导。论文的研究成果,对于丰富网络舆论斗争理论,占领网络舆论制高点,具有重要理论意义和参考价值。 相似文献
416.
417.
418.
419.
420.
教师的水平制约着教育的发展,双语教师在双语教育中起着重要作用。本文对新疆喀什地区泽普县维族双语教师的汉语水平进行实地调研,找出他们汉语水平存在的问题,并针对问题提出建议。 相似文献