基于网络结构的武器装备体系能力分析

现代战争以及从"平台为中心"转向以"网络为中心",强调的是通过各类武器平台通过相互之间的协作配合而形成作战网络来实现体系能力。从宏观和微观两个角度分析了武器装备体系能力的实现机理,构建了武器装备体系的作战网络结构模型,给出了作战网络结构模型中的节点类型和关系类型,提出了能力环的概念,从作战网络结构的角度对武器装备体系的整体能力进行了分析,并给出了具体算例。     

无源雷达截获概率建模与窗口变量影响仿真

在截获概率概念和截获条件的基础上,综合时域、空域、频域等窗口函数构建截获概率模型,分别建立截获过程的4个窗口函数子模型,研究截获概率与窗口函数变量的影响关系。以SPS-48雷达为辐射源,仿真分析各窗口函数变量对截获概率的影响程度,讨论分区策略下无源雷达参数优化对截获概率的影响并总结截获概率提高方法,为无源雷达设计、研制、试验以及使用提供技术支撑。     

网络作战能力评估研究

近年来,国内外学者对网络作战能力评估问题进行了大量深入的研究,并取得了很多重要成果,但是缺乏对该领域研究现状的归纳与总结。网络作战能力评估主要涉及指标体系构建、指标权重确定以及评估方法的选择,归纳了3种网络作战能力评估指标体系构建方法及划分角度,并进行对比分析;梳理了3种评估指标权重确定方法,并对其特点进行总结;介绍了几种常见网络作战能力评估方法。为组织网络作战能力评估提供一定的借鉴和参考。     

基于样块改进的图像修复算法

图像修复是指对图像破损区域进行填充或者将图像中多余物体进行移除。在Criminisi算法的基础上进行改进,在待修复块优先权的计算过程中,由于等照度线的曲率可以反映图像的局部特征,块与块之间的方差值可以反映图像的边缘信息,因此,将二者考虑进来,确保修复过程能够准确有序地进行。在寻找最佳匹配块时,将等照度线的曲率也作为一个因素增加进来,有效地提高了最佳匹配块搜索的精确性。经过仿真实验证明,改进后的算法不仅在PSNR值上比原算法有所提高,而且修复结果也比原算法更加准确可靠。     

航空加权网络抗毁性综合评估方法

根据目前网络抗毁性研究中指标单一、网络无权等不足,针对航空网络的特点,以流量为边权,提出了一种多指标的航空网络抗毁性评估方法。基于网络吞吐量、相似权网络流量、节点相邻边权重分布分别构建了鲁棒性度量、网络效率度量、网络适应性度量。最后通过建立西北地区航空网络进行仿真,结果表明:西北地区航空网络具有与星型网络相似的性能,鲁棒性较差,网络效率较好,咸阳和乌鲁木齐作为中心节点,具有较好的主抗性能。实验结果证明了该评估方法的有效性。     

基于滑模控制的某型起落架落震联合仿真

飞机起落架是飞机起落的安全保证。给出了在ADAMS/Aircraft中建立某型飞机起落架的虚拟样机模型,设计并实现基于磁流变液的飞机起落架滑模缓冲控制算法,通过MATLAB/Simulink和ADAMS完成了该型飞机起落架着陆缓冲联合仿真分析。经过联合仿真得到缓冲器的位移-时间曲线,速度-时间曲线,阻尼力-时间曲线等特性数据,通过与被动式起落架的缓冲性能进行比较,验证了设计的滑模控制算法能够有效提高飞机起落架着陆缓冲性能。     

美军装备维修改革现状与发展

近些年来,美军为有效适应高新武器装备发展需要和军事转型挑战,持续在装备维修领域进行了一系列深度改革。着重从维修思想、维修技术、维修手段和维修体制4个方面系统分析了相关改革现状,阐释了这些改革的动因、内容、成效和发展趋势。研究表明,美军装备维修改革促成了信息化条件下美军装备维修保障的新优势。     

军事院校推动国家安全教育研究

提出互联网+时代军队院校面临与军队新型作战能力培养有关的国家安全时代课题,从整合新媒体网络资源、依托校园文化平台、构建国家安全教育体系三方面进行了对策分析,重点探索与新军事变革密切相关的"文化安全、军事话语传播、地缘政治"等议题,以学术活动的顶层设计将国家安全教育融入军事院校学员具有中国特色的军事理论创新。     

An exact network flow formulation for cell‐based evacuation in urban areas

In the literature two common macroscopic evacuation planning approaches exist: The dynamic network flow approach and the Cell–Transmission–Based approach. Both approaches have advantages and disadvantages. Many efficient solution approaches for the dynamic network flow approach exist so that realistic problem instances can be considered. However, the consideration of (more) realistic aspects (eg, density dependent travel times) results in non‐linear model formulations. The Cell‐Transmission‐Based approach on the other hand considers realistic traffic phenomena like shock waves and traffic congestion, but this approach leads to long computational times for realistic problem instances. In this article, we combine the advantages of both approaches: We consider a Cell‐Transmission‐Based Evacuation Planning Model (CTEPM) and present a network flow formulation that is equivalent to the cell‐based model. Thus, the computational costs of the CTEPM are enormously reduced due to the reformulation and the detailed representation of the traffic flow dynamics is maintained. We investigate the impacts of various evacuation scenario parameters on the evacuation performance and on the computational times in a computational study including 90 realistic instances.     

Sensor placement in active multistatic sonar networks

The idea of deploying noncollocated sources and receivers in multistatic sonar networks (MSNs) has emerged as a promising area of opportunity in sonar systems. This article is one of the first to address point coverage problems in MSNs, where a number of points of interest have to be monitored in order to protect them from hostile underwater assets. We consider discrete “definite range” sensors as well as various diffuse sensor models. We make several new contributions. By showing that the convex hull spanned by the targets is guaranteed to contain optimal sensor positions, we are able to limit the solution space. Under a definite range sensor model, we are able to exclude even more suboptimal solutions. We then formulate a nonlinear program and an integer nonlinear program to express the sensor placement problem. To address the nonconvex single‐source placement problem, we develop the Divide Best Sector (DiBS) algorithm, which quickly provides an optimal source position assuming fixed receivers. Starting with a basic implementation of DiBS, we show how incorporating advanced sector splitting methods and termination conditions further improve the algorithm. We also discuss two ways to use DiBS to find multiple source positions by placing sensors iteratively or simultaneously. © 2017 Wiley Periodicals, Inc. Naval Research Logistics 64: 287–304, 2017