全文获取类型
| 收费全文 | 359篇 |
| 免费 | 12篇 |
| 国内免费 | 3篇 |
专业分类
| 374篇 |
出版年
| 2025年 | 3篇 |
| 2024年 | 3篇 |
| 2023年 | 7篇 |
| 2022年 | 3篇 |
| 2021年 | 6篇 |
| 2020年 | 9篇 |
| 2019年 | 13篇 |
| 2018年 | 10篇 |
| 2017年 | 10篇 |
| 2016年 | 14篇 |
| 2015年 | 12篇 |
| 2014年 | 29篇 |
| 2013年 | 35篇 |
| 2012年 | 16篇 |
| 2011年 | 25篇 |
| 2010年 | 24篇 |
| 2009年 | 12篇 |
| 2008年 | 13篇 |
| 2007年 | 13篇 |
| 2006年 | 18篇 |
| 2005年 | 9篇 |
| 2004年 | 19篇 |
| 2003年 | 8篇 |
| 2002年 | 9篇 |
| 2001年 | 11篇 |
| 2000年 | 4篇 |
| 1999年 | 7篇 |
| 1998年 | 3篇 |
| 1997年 | 6篇 |
| 1996年 | 5篇 |
| 1995年 | 2篇 |
| 1994年 | 4篇 |
| 1993年 | 1篇 |
| 1992年 | 2篇 |
| 1991年 | 3篇 |
| 1990年 | 6篇 |
排序方式： 共有374条查询结果，搜索用时 0 毫秒
271.
Washington's so-called Maritime Strategy, which sought to apply US naval might against Soviet vulnerabilities on its maritime flanks, came to full fruition during the 1980s. The strategy, which witnessed a major buildup of US naval forces and aggressive exercising in seas proximate to the USSR, also explicitly targeted Moscow”s strategic missile submarines with the aim of pressuring the Kremlin during crises or the early phases of global war. Relying on a variety of interviews and newly declassified documents, the authors assert that the Maritime Strategy represents one of the rare instances in history when intelligence helped lead a nation to completely revise its concept of military operations. 相似文献
272.
273.
面对指控组织(C2组织)日益呈现出的复杂性和网络化结构特点,提出基于复杂网络的研究思路,并从现实指控组织网络出发,分析复杂网络理论适用于指控组织建模的现实与理论依据。结合指控组织建设的普遍实际,参考复杂网络适应度模型及组织网络模型后,基于新节点和内部边两方面交互增长的思想,建立了指控组织生成模型。通过仿真实验,验证了无标度性、小世界性等复杂网络特性,符合现实指控组织的特点,为进一步进行指控组织效能评估提供了基础。 相似文献
274.
275.
基于MVC的分布式作战应用框架研究 总被引：1，自引：0，他引：1
MVC作为一种经典的软件模式,在界面程序设计和B/S系统中得到了广泛应用.随着分布式技术的发展,MVC的含义和用途变得更加广泛,不仅可以用于组件的构造,也可用于分布式程序的设计.针对MVC模式和分布式作战应用的特点进行了深入分析,提出了一种基于MVC的分布式作战应用框架,在保持传统C/S架构优势的同时,增强了系统的可扩展性,实现了业务流程和逻辑计算的有效分离,为大型C/S作战应用系统的开发提供了一个有效的架构解决方案. 相似文献
276.
《防务技术》2020,16(3):627-634
The Al3Ti compound has potential application in the high temperature structure materials due to its low density, high strength and stiffness. The mechanical behaviors of the material under different loading rates were studied using compression tests. The results indicate that Al3Ti is a typical brittle material and its compressive strength is dependent on the strain rate. Therefore, a series of rate-dependent constitutive equations are needed to describe its mechanical behaviors accurately. However, it is still short of professional research on the material model for Al3Ti. In this study, the material model was developed on the basis of JH-2 constitutive equations using the experimental data. The model was then applied in simulating the impact process of Ti/Al3Ti metal-intermetallic laminate composites so as to validate the established model. Good agreement between simulation and experiment results shows the constitutive model predict the material responses under high rate and large deformation accurately. This work provides more support for the theoretical and numerical research on the intermetallic. 相似文献
277.
James J. Wirtz 《Defense & Security Analysis》2020,36(1):88-100
ABSTRACTA call for innovation as a means to outpace the acceleration of technological change and to bolster capabilities quickly is a central theme of contemporary U.S. Naval Strategy. The need for innovation is accepted, but the integration of readily available technologies into the Fleet is slow. Innovation unfolds according to “Navy-Time,” a cycle lasting between a long-decade and thirty-years. To accelerate the innovation process in the U.S. Navy, the article offers a Concept of Operations for Innovation that outlines how a deliberate process of analysis, weaponisation and integration can move new ideas and weapons into the Fleet in a strategically relevant time-frame. 相似文献
278.
Peter Haynes 《Defense & Security Analysis》2020,36(1):101-108
ABSTRACTFor the first time in a generation, the US Navy finds itself in an era of great power competition. As US naval strategists and defense planners begin to organise materially and conceptually to confront the strategic and operational-level challenges posed by China and Russia, what should they keep in mind? What should frame their thinking? Absorbed with the day-to-day tasks associated with managing how the fleet is being built, operated, and rationalised, these busy officers and civilians seldom can step back and gain some perspective on fundamental aspects of the security environment and relate those to naval purpose. To that end, this article provides a primer on what to keep in mind and how to think in an era of maritime great power competition. 相似文献
279.
为了实现对4179小行星飞越之后的嫦娥二号卫星的最大限度利用,提出了后续小行星飞越探测计划,研究了相关飞行任务设计。基于嫦娥二号卫星轨道、剩余燃料和测控距离等约束,设计了能量最优的转移轨道,给出了合适的小行星交会目标。研究了不同轨道控制方式下的转移轨道中途修正。基于我国深空测控网分布,分析了嫦娥二号后续小行星飞越探测任务的测控情况。研究结果表明,基于嫦娥二号剩余燃料,合适的飞越探测目标为小行星1997XF11和2005VS,转移过程中我国深空测控站每天可以实现8h以上跟踪,中途修正速度增量小于10m/s。 相似文献
280.
基于DM2提出与设计工具无关的军事电子信息系统体系结构集成方法,通过数据集成进而实现体系结构设计成果的集成;根据集成过程中数据处理的需要,分为预处理、文件合并和冗余处理3个阶段;在描述3个阶段所采用方法的基础上,对每个阶段分别进行了实验,不仅证明各阶段方法的有效性,也证明了基于DM2的体系结构集成方法的可行性和有效性。 相似文献