管输水力摩阻不分区计算与实验研究

长输管道输送一般处于紊流区,紊流区的水力摩阻计算一直采用分区计算的方法,涉及到的公式较多,使用起来不方便,并且分区附近存在数值跃变;由于混合摩擦区的计算通常采用近似公式,误差增加,最大甚至可达百分之十几。科尔布鲁克公式被公认为是计算混合摩擦区摩阻因数的准确公式,也可近似地用于水力光滑区和完全粗糙区的计算。文中给出了基于科尔布鲁克公式的水力摩阻计算公式,用该公式统一紊流区水力摩阻计算,并对不同油品在同一管道中流动的水力摩阻损失进行了实验研究,用实验数据分析了水力摩阻计算公式的误差。研究表明,紊流区的水力摩阻计算可不分区,均采用科尔布鲁克公式,以利于工程计算,同时可提高混合摩擦区的计算精度。     

因材施教 提高函授教学质量

教学质量问题,是一直困绕着函授教育的重要问题。本文从教学角度就如何提高函授教育的教学质量谈些看法。     

如何在防化科研试验中加强安全保密工作

针对我院科研试验的特点和要求,分析了安全保密工作的艰巨性和重要性,明确了安全保密总要求,提出了把安全保密工作落到实处的具体措施。     

一种新型的目标分配形式及算法

提出了一种新型的目标分配形式--顺序攻击目标分配形式,并以地空导弹拦截攻击机机群为研究对象,给出了均匀目标分配形式和顺序攻击目标分配形式,以及在机群无干扰武器和有干扰武器状态下,地空导弹拦截效果的算法模型.数值分析表明,顺序攻击目标分配形式有较好的攻击效果.     

Mission Command in the Information Age: A Normal Accidents Perspective on Networked Military Operations

Theory on the use of information technology in military operations assumes that bringing together units in an information network helps units to work together. Decentralized command systems such as mission command have been proposed for these networks, so that units can adapt to changes in their turbulent working environments. Others have proposed centralized command systems that permit higher organizational levels to closely direct military operations. This article uses Perrow’s (1984, 1999) Normal Accidents Theory to propose that increasing interdependencies between units in information networks places incompatible demands on the design of networked military operations. It is concluded that networked military operations require decentralized command approaches, but only under the condition that interdependencies between modules of networked units are weak rather than tight. This precondition is essential for retaining control over networked military operations.     

War’s Horizon: Soldier-Led Adaptation in Iraq and Vietnam

Wartime adaptation is a process of adjustment from the war you planned for to the one you have. This process of adjustment is done, in part, by the practitioners of war in the theater of conflict–soldier-led adaptation. Drawing upon two case studies of gun truck development in Iraq and Vietnam I argue that soldiers created networks in order to adapt to battlefield challenges and that the pattern of those networks carries implications for the likelihood of formal adoption by the organization. Simply put, the pattern of the flow of ideas, resources, and skills across the battlefield may affect the likelihood of bottom-up adaptation.     

Visual-simulation region proposal and generative adversarial network based ground military target recognition

Ground military target recognition plays a crucial role in unmanned equipment and grasping the battlefield dynamics for military applications, but is disturbed by low-resolution and noisy-representation. In this paper, a recognition method, involving a novel visual attention mechanism-based Gabor region proposal sub-network (Gabor RPN) and improved refinement generative adversarial sub-network (GAN), is proposed. Novel central–peripheral rivalry 3D color Gabor filters are proposed to simulate retinal structures and taken as feature extraction convolutional kernels in low-level layer to improve the recognition accuracy and framework training efficiency in Gabor RPN. Improved refinement GAN is used to solve the problem of blurry target classification, involving a generator to directly generate large high-resolution images from small blurry ones and a discriminator to distinguish not only real images vs. fake images but also the class of targets. A special recognition dataset for ground military target, named Ground Military Target Dataset (GMTD), is constructed. Experiments performed on the GMTD dataset effectively demonstrate that our method can achieve better energy-saving and recognition results when low-resolution and noisy-representation targets are involved, thus ensuring this algorithm a good engineering application prospect.     

伊拉克战争对中东地区乃至世界军品贸易的影响

在分析了伊拉克战争对中东地区军品贸易影响的基础上,重点分析了其对世界军品贸易的深刻影响———加剧军备竞赛、刺激军工技术发展、引起军贸格局及产品结构发生变化、国际军控形势更加严峻。     

抗日军政大学华中分校对青年马克思主义者的思想政治教育

抗战时期,新四军创办的抗日军政大学华中分校吸引了大批青年,通过马克思主义理论的学习和实践教学来开展思想政治教育工作。学校采取了灵活多样的思想政治教育形式,培养了大批军政干部,使青年学生提高了马克思主义理论水平,培养了艰苦朴素的作风,坚定了革命意志。其教学方法对当今的思想政治工作仍然具有现实的借鉴意义。     

排列熵算法的应用与发展

重点阐述了排列熵算法的基本原理,总结归纳了该算法在医学、生物和机械等领域的国内外研究和应用现状,最后展望了排列熵算法的未来发展趋势。研究表明：排列熵算法能够有效放大时间序列的微弱变化,且计算简单、实时性高,已在信号突变检测方面显示出良好的应用前景。