首页 > 最新文献

Journal of Defense Modeling and Simulation-Applications Methodology Technology-JDMS最新文献

英文 中文
Marine seismic signal denoising using VMD with Hausdorff distance and wavelet transform 基于Hausdorff距离和小波变换的VMD方法对海洋地震信号进行降噪
IF 0.8 Q3 Engineering Pub Date : 2021-08-16 DOI: 10.1177/15485129211036044
Abhishek Kesharwani, Vaibhav Aggarwal, Shubham Singh, R. B R, Arvind Kumar
In marine seismic acquisitions, signal interference remains a major menace. In this paper, a denoising approach based on the Variational Mode Decomposition (VMD) combined with the Hausdorff distance (HD) and Wavelet transform (WT) is proposed. There has been substantial research in this field over the years. However, traditional denoising methods fall short of achieving satisfactory results in an extremely low signal to noise ratio (SNR) environment. The feasibility, and stability of the proposed method was validated by performing simulations in MATLAB on both a synthetic signal and a seismic signal generated using real dataset. It was found that the proposed method does well in preserving marine signals in low SNR environments, and has a superior output SNR.
在海洋地震采集中,信号干扰仍然是一个主要的威胁。本文提出了一种基于变分模态分解(VMD)、Hausdorff距离(HD)和小波变换(WT)相结合的噪声去噪方法。多年来在这个领域有大量的研究。然而,在极低信噪比的环境下,传统的去噪方法无法达到令人满意的效果。在MATLAB中对合成信号和真实数据集生成的地震信号进行了仿真,验证了该方法的可行性和稳定性。结果表明,该方法在低信噪比环境下仍能很好地保存船舶信号,并具有较好的输出信噪比。
{"title":"Marine seismic signal denoising using VMD with Hausdorff distance and wavelet transform","authors":"Abhishek Kesharwani, Vaibhav Aggarwal, Shubham Singh, R. B R, Arvind Kumar","doi":"10.1177/15485129211036044","DOIUrl":"https://doi.org/10.1177/15485129211036044","url":null,"abstract":"In marine seismic acquisitions, signal interference remains a major menace. In this paper, a denoising approach based on the Variational Mode Decomposition (VMD) combined with the Hausdorff distance (HD) and Wavelet transform (WT) is proposed. There has been substantial research in this field over the years. However, traditional denoising methods fall short of achieving satisfactory results in an extremely low signal to noise ratio (SNR) environment. The feasibility, and stability of the proposed method was validated by performing simulations in MATLAB on both a synthetic signal and a seismic signal generated using real dataset. It was found that the proposed method does well in preserving marine signals in low SNR environments, and has a superior output SNR.","PeriodicalId":44661,"journal":{"name":"Journal of Defense Modeling and Simulation-Applications Methodology Technology-JDMS","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82590239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Examination of the fifth-generation vehicular simultaneous wireless information and power transfer cooperative non-orthogonal multiple access network in military scenarios considering time-varying and imperfect channel state information conditions 考虑时变和不完全信道状态信息条件的军用第五代车载同步无线信息与功率传输协同非正交多址网络研究
IF 0.8 Q3 Engineering Pub Date : 2021-08-10 DOI: 10.1177/15485129211033040
Sharnil Pandya, Patteti Krishna, Ravi Shankar, Ankur Singh Bist
In a defense scenario, the communicating nodes are mobile and, due to this, the fading channel links become time selective in nature. Non-orthogonal multiple access (NOMA) is a promising technique in modern wireless communication systems, and it is employed in a variety of defense ad hoc wireless communication scenarios where nodes are mobile and it is difficult to estimate the channel coefficients perfectly. NOMA contributes to increased spectral efficiency (SE), firstly by enabling fifth-generation new radio deployment in the 3.5 GHz frequency range, and secondly by employing a simultaneous wireless information and power transfer (SWIPT) time switching and power splitting-based cooperative NOMA (C-NOMA) network where simple radio frequency circuitry is used for energy harvesting. NOMA together with the selective decode-and-forward (S-DF) protocol will increase the SE and energy efficiency simultaneously. The outage probability performance is evaluated for various values of the fading severity parameter and node velocity forming the channel error. It is significant to note that digital S-DF-based SWIPT C-NOMA performs much better than an analog amplify-and-forward-based C-NOMA SWIPT system.
在防御场景中,通信节点是移动的,因此,衰落信道链路在本质上具有时间选择性。非正交多址(NOMA)是现代无线通信系统中一种很有发展前途的技术,它被应用于各种节点移动且信道系数难以完美估计的防御自组织无线通信场景中。NOMA有助于提高频谱效率(SE),首先是通过在3.5 GHz频率范围内实现第五代新无线电部署,其次是通过采用同步无线信息和功率传输(SWIPT)时间交换和基于功率分割的合作NOMA (C-NOMA)网络,其中使用简单的射频电路进行能量收集。NOMA与选择性解码转发(S-DF)协议将同时提高SE和能效。对形成信道误差的衰落严重参数和节点速度的不同取值进行了中断概率性能评估。值得注意的是,基于s - df的数字SWIPT C-NOMA比基于模拟放大和前向的C-NOMA SWIPT系统性能要好得多。
{"title":"Examination of the fifth-generation vehicular simultaneous wireless information and power transfer cooperative non-orthogonal multiple access network in military scenarios considering time-varying and imperfect channel state information conditions","authors":"Sharnil Pandya, Patteti Krishna, Ravi Shankar, Ankur Singh Bist","doi":"10.1177/15485129211033040","DOIUrl":"https://doi.org/10.1177/15485129211033040","url":null,"abstract":"In a defense scenario, the communicating nodes are mobile and, due to this, the fading channel links become time selective in nature. Non-orthogonal multiple access (NOMA) is a promising technique in modern wireless communication systems, and it is employed in a variety of defense ad hoc wireless communication scenarios where nodes are mobile and it is difficult to estimate the channel coefficients perfectly. NOMA contributes to increased spectral efficiency (SE), firstly by enabling fifth-generation new radio deployment in the 3.5 GHz frequency range, and secondly by employing a simultaneous wireless information and power transfer (SWIPT) time switching and power splitting-based cooperative NOMA (C-NOMA) network where simple radio frequency circuitry is used for energy harvesting. NOMA together with the selective decode-and-forward (S-DF) protocol will increase the SE and energy efficiency simultaneously. The outage probability performance is evaluated for various values of the fading severity parameter and node velocity forming the channel error. It is significant to note that digital S-DF-based SWIPT C-NOMA performs much better than an analog amplify-and-forward-based C-NOMA SWIPT system.","PeriodicalId":44661,"journal":{"name":"Journal of Defense Modeling and Simulation-Applications Methodology Technology-JDMS","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85232028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Space surveillance architecture: issues and challenges – an integrated approach 空间监视体系结构:问题和挑战——一种综合方法
IF 0.8 Q3 Engineering Pub Date : 2021-07-28 DOI: 10.1177/15485129211031673
Dionysios Tompros
The object of this study is space surveillance activity and the information systems involved for actors and national security organizations. Near and Deep Space Surveillance areas are presented, the former dealing with artificial objects and the latter the inner planetary system, including asteroids and its exploration and exploitation. (Near Space includes the upper layers of the atmosphere (thermosphere, exosphere) and the magnetosphere up to the limits of the magnetopause (6–15 RE). Deep Space refers to the space after the magnetopause and practically up to the limits of the Kuiper belt, about 50 A.U.) Due to the different matter of each area, the two sectors cannot have a common system for surveillance. The ever-increasing interest in natural resource extraction from the asteroid belt, the Moon, and Near-Earth Objects, combined with the explosive growth of the number of satellite commercial applications, makes the development and interconnection of the two distinct sector systems a necessity. This study describes the surveillance systems, the available technologies and methods, and develops a comprehensive oversight proposal.
本研究的对象是空间监视活动以及为行为体和国家安全组织所涉及的信息系统。提出了近空和深空监测领域,前者涉及人造物体,后者涉及内行星系统,包括小行星及其探测和开发。(近空间包括大气上层(热层、外逸层)和磁层直至磁层顶的极限(6-15 RE)。深空指的是磁层顶之后的空间,实际上一直到柯伊伯带的极限,大约50天文单位。由于每个领域的问题不同,这两个部门不可能有一个共同的监视系统。人们对从小行星带、月球和近地天体提取自然资源的兴趣日益增加,再加上卫星商业应用数量的爆炸性增长,使得这两个不同部门系统的发展和互联成为必要。本研究描述了监测系统、可用的技术和方法,并提出了一项全面的监督建议。
{"title":"Space surveillance architecture: issues and challenges – an integrated approach","authors":"Dionysios Tompros","doi":"10.1177/15485129211031673","DOIUrl":"https://doi.org/10.1177/15485129211031673","url":null,"abstract":"The object of this study is space surveillance activity and the information systems involved for actors and national security organizations. Near and Deep Space Surveillance areas are presented, the former dealing with artificial objects and the latter the inner planetary system, including asteroids and its exploration and exploitation. (Near Space includes the upper layers of the atmosphere (thermosphere, exosphere) and the magnetosphere up to the limits of the magnetopause (6–15 RE). Deep Space refers to the space after the magnetopause and practically up to the limits of the Kuiper belt, about 50 A.U.) Due to the different matter of each area, the two sectors cannot have a common system for surveillance. The ever-increasing interest in natural resource extraction from the asteroid belt, the Moon, and Near-Earth Objects, combined with the explosive growth of the number of satellite commercial applications, makes the development and interconnection of the two distinct sector systems a necessity. This study describes the surveillance systems, the available technologies and methods, and develops a comprehensive oversight proposal.","PeriodicalId":44661,"journal":{"name":"Journal of Defense Modeling and Simulation-Applications Methodology Technology-JDMS","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79711377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Physical Optics Radar Cross Section predictions for an anti-ship cruise missile 反舰巡航导弹的物理光学雷达截面预测
IF 0.8 Q3 Engineering Pub Date : 2021-07-24 DOI: 10.1177/15485129211033039
Panagiotis Touzopoulos, K. Zikidis
The capability of the first strike is crucial in the modern battlefield. An important parameter is the radar signature or Radar Cross Section (RCS) of a weapon system, such as a fighter aircraft, a warship, or a missile, affecting the range at which this weapon system would be detected as a target by an enemy radar. If the attacker is detected too late, there will be minimal time for the defender to react, possibly not sufficient to counter the threat. The RCS of a weapon system is considered generally as classified information. However, it can be measured at a suitable measurement test range, if that weapon system is available. Otherwise, it can be predicted with the help of computational electromagnetics. Concerning the second approach, the following procedure was recently proposed: construction of a three-dimensional model of a target, based on available images and any relevant data, and then computation of the target RCS, with the Physical Optics approximative method. In the present approach, this procedure is applied to an anti-ship cruise missile in order to compute its RCS. Finally, the expected detection range for various naval radars is calculated.
在现代战场上,先发制人的能力是至关重要的。一个重要的参数是武器系统(如战斗机、军舰或导弹)的雷达特征或雷达截面(RCS),它影响该武器系统被敌方雷达探测到作为目标的距离。如果攻击者被发现得太晚,防御者的反应时间就会很短,可能不足以对抗威胁。武器系统的RCS通常被认为是机密信息。但是,如果该武器系统可用,则可以在适当的测量测试范围内进行测量。否则,它可以借助计算电磁学进行预测。关于第二种方法,最近提出了以下步骤:基于现有图像和任何相关数据构建目标的三维模型,然后使用物理光学近似方法计算目标的RCS。本文将该方法应用于某型反舰巡航导弹的RCS计算。最后,计算了各种海军雷达的期望探测距离。
{"title":"Physical Optics Radar Cross Section predictions for an anti-ship cruise missile","authors":"Panagiotis Touzopoulos, K. Zikidis","doi":"10.1177/15485129211033039","DOIUrl":"https://doi.org/10.1177/15485129211033039","url":null,"abstract":"The capability of the first strike is crucial in the modern battlefield. An important parameter is the radar signature or Radar Cross Section (RCS) of a weapon system, such as a fighter aircraft, a warship, or a missile, affecting the range at which this weapon system would be detected as a target by an enemy radar. If the attacker is detected too late, there will be minimal time for the defender to react, possibly not sufficient to counter the threat. The RCS of a weapon system is considered generally as classified information. However, it can be measured at a suitable measurement test range, if that weapon system is available. Otherwise, it can be predicted with the help of computational electromagnetics. Concerning the second approach, the following procedure was recently proposed: construction of a three-dimensional model of a target, based on available images and any relevant data, and then computation of the target RCS, with the Physical Optics approximative method. In the present approach, this procedure is applied to an anti-ship cruise missile in order to compute its RCS. Finally, the expected detection range for various naval radars is calculated.","PeriodicalId":44661,"journal":{"name":"Journal of Defense Modeling and Simulation-Applications Methodology Technology-JDMS","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78379484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
A reinforcement learning approach to adaptive remediation in online training 在线培训中自适应修复的强化学习方法
IF 0.8 Q3 Engineering Pub Date : 2021-07-23 DOI: 10.1177/15485129211028317
Randall D. Spain, Jonathan P. Rowe, A. Smith, B. Goldberg, R. Pokorny, Bradford W. Mott, James C. Lester
Advances in artificial intelligence (AI) and machine learning can be leveraged to tailor training based on the goals, learning needs, and preferences of learners. A key component of adaptive training systems is tutorial planning, which controls how scaffolding is structured and delivered to learners to create dynamically personalized learning experiences. The goal of this study was to induce data-driven policies for tutorial planning using reinforcement learning (RL) to provide adaptive scaffolding based on the Interactive, Constructive, Active, Passive framework for cognitive engagement. We describe a dataset that was collected to induce RL-based scaffolding policies, and we present the results of our policy analyses. Results showed that the best performing policies optimized learning gains by inducing an adaptive fading approach in which learners received less cognitively engaging forms of remediation as they advanced through the training course. This policy was consistent with preliminary analyses that showed constructive remediation became less effective as learners progressed through the training session. Results also showed that learners’ prior knowledge impacted the type of scaffold that was recommended, thus showing evidence of an aptitude–treatment interaction. We conclude with a discussion of how AI-based training can be leveraged to enhance training effectiveness as well as directions for future research.
人工智能(AI)和机器学习的进步可以根据学习者的目标、学习需求和偏好来定制培训。适应性培训系统的一个关键组成部分是教程规划,它控制如何搭建和交付给学习者创建动态个性化的学习体验。本研究的目的是利用强化学习(RL)诱导数据驱动的教学计划策略,以提供基于认知参与的交互式、建设性、主动、被动框架的自适应脚手架。我们描述了一个收集的数据集,该数据集用于诱导基于rl的脚手架策略,并展示了我们的政策分析结果。结果表明,表现最好的策略通过诱导自适应消退方法优化了学习收益,在这种方法中,学习者在培训课程中获得较少的认知参与形式的补救。这一政策与初步分析相一致,该分析表明,随着学习者在培训阶段的进步,建设性的补习变得不那么有效。结果还表明,学习者的先验知识影响了推荐的支架类型,从而显示了能力-治疗相互作用的证据。最后,我们讨论了如何利用基于人工智能的训练来提高训练效率以及未来的研究方向。
{"title":"A reinforcement learning approach to adaptive remediation in online training","authors":"Randall D. Spain, Jonathan P. Rowe, A. Smith, B. Goldberg, R. Pokorny, Bradford W. Mott, James C. Lester","doi":"10.1177/15485129211028317","DOIUrl":"https://doi.org/10.1177/15485129211028317","url":null,"abstract":"Advances in artificial intelligence (AI) and machine learning can be leveraged to tailor training based on the goals, learning needs, and preferences of learners. A key component of adaptive training systems is tutorial planning, which controls how scaffolding is structured and delivered to learners to create dynamically personalized learning experiences. The goal of this study was to induce data-driven policies for tutorial planning using reinforcement learning (RL) to provide adaptive scaffolding based on the Interactive, Constructive, Active, Passive framework for cognitive engagement. We describe a dataset that was collected to induce RL-based scaffolding policies, and we present the results of our policy analyses. Results showed that the best performing policies optimized learning gains by inducing an adaptive fading approach in which learners received less cognitively engaging forms of remediation as they advanced through the training course. This policy was consistent with preliminary analyses that showed constructive remediation became less effective as learners progressed through the training session. Results also showed that learners’ prior knowledge impacted the type of scaffold that was recommended, thus showing evidence of an aptitude–treatment interaction. We conclude with a discussion of how AI-based training can be leveraged to enhance training effectiveness as well as directions for future research.","PeriodicalId":44661,"journal":{"name":"Journal of Defense Modeling and Simulation-Applications Methodology Technology-JDMS","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89015035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Optimization of the Navy’s three-dimensional mine impact burial prediction simulation model, Impact35, using high-order numerical methods 采用高阶数值方法优化海军三维水雷冲击埋藏预测仿真模型Impact35
IF 0.8 Q3 Engineering Pub Date : 2021-07-23 DOI: 10.1177/15485129211028661
A. Donas, I. Famelis, P. Chu, G. Galanis
The aim of this paper is to present an application of high-order numerical analysis methods to a simulation system that models the movement of a cylindrical-shaped object (mine, projectile, etc.) in a marine environment and in general in fluids with important applications in Naval operations. More specifically, an alternative methodology is proposed for the dynamics of the Navy’s three-dimensional mine impact burial prediction model, Impact35/vortex, based on the Dormand–Prince Runge–Kutta fifth-order and the singly diagonally implicit Runge–Kutta fifth-order methods. The main aim is to improve the time efficiency of the system, while keeping the deviation levels of the final results, derived from the standard and the proposed methodology, low.
本文的目的是将高阶数值分析方法应用于模拟海洋环境和一般流体中圆柱形物体(地雷,弹丸等)运动的仿真系统,并在海军作战中具有重要应用。更具体地说,本文提出了一种基于Dormand-Prince龙格-库塔五阶方法和单对角隐式龙格-库塔五阶方法的海军三维地雷冲击埋藏预测模型的动力学替代方法,Impact35/vortex。主要目的是提高系统的时间效率,同时保持从标准和建议的方法中得出的最终结果的偏差水平较低。
{"title":"Optimization of the Navy’s three-dimensional mine impact burial prediction simulation model, Impact35, using high-order numerical methods","authors":"A. Donas, I. Famelis, P. Chu, G. Galanis","doi":"10.1177/15485129211028661","DOIUrl":"https://doi.org/10.1177/15485129211028661","url":null,"abstract":"The aim of this paper is to present an application of high-order numerical analysis methods to a simulation system that models the movement of a cylindrical-shaped object (mine, projectile, etc.) in a marine environment and in general in fluids with important applications in Naval operations. More specifically, an alternative methodology is proposed for the dynamics of the Navy’s three-dimensional mine impact burial prediction model, Impact35/vortex, based on the Dormand–Prince Runge–Kutta fifth-order and the singly diagonally implicit Runge–Kutta fifth-order methods. The main aim is to improve the time efficiency of the system, while keeping the deviation levels of the final results, derived from the standard and the proposed methodology, low.","PeriodicalId":44661,"journal":{"name":"Journal of Defense Modeling and Simulation-Applications Methodology Technology-JDMS","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76603055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Space to Air High-Altitude Region Adjoint Neutron Transport 空间到空气高海拔区域伴随中子传输
IF 0.8 Q3 Engineering Pub Date : 2021-07-23 DOI: 10.1177/15485129211031669
Zachary W LaMere, D. Holland, W. Dailey, J. McClory
Neutrons from an atmospheric nuclear explosion can be detected by sensors in orbit. Current tools for characterizing the neutron energy spectrum assume a known source and use forward transport to recreate the detector response. In realistic scenarios the true source is unknown, making this an inefficient, iterative approach. In contrast, the adjoint approach directly solves for the source spectrum, enabling source reconstruction. The time–energy fluence at the satellite and adjoint transport equation allow a Monte Carlo method to characterize the neutron source’s energy spectrum directly in a new model: the Space to High-Altitude Region Adjoint (SAHARA) model. A new adjoint source event estimator was developed in SAHARA to find feasible solutions to the neutron transport problem given the constraints of the adjoint environment. This work explores SAHARA’s development and performance for mono-energetic and continuous neutron energy sources. In general, the identified spectra were shifted towards energies approximately 5% lower than the true source spectra, but SAHARA was able to capture the correct spectral shapes. Continuous energy sources, including real-world sources Fat Man and Little Boy, resulted in identifiable spectra that could have been produced by the same distribution as the true sources as demonstrated by two-dimensional (2D) Kolmogorov–Smirnov tests.
大气核爆炸产生的中子可以被轨道上的传感器探测到。目前用于表征中子能谱的工具假设有一个已知的源,并使用前向输运来重建探测器的响应。在现实的场景中,真正的来源是未知的,这使得这是一种低效的迭代方法。而伴随法直接求解源谱,实现源重构。卫星上的时间-能量影响和伴随输运方程允许蒙特卡罗方法在一个新模型中直接表征中子源的能谱:空间到高海拔区域伴随(SAHARA)模型。为了寻找在伴随环境约束下中子输运问题的可行解,在撒哈拉地区开发了一种新的伴随源事件估计器。本工作探讨了SAHARA在单能和连续中子能量源方面的发展和性能。一般来说,识别光谱的能量比真实源光谱低约5%,但SAHARA能够捕获正确的光谱形状。连续的能量源,包括现实世界的“胖子”和“小男孩”,产生了可识别的光谱,这些光谱可以通过二维(2D) Kolmogorov-Smirnov测试所证明的与真实源相同的分布产生。
{"title":"Space to Air High-Altitude Region Adjoint Neutron Transport","authors":"Zachary W LaMere, D. Holland, W. Dailey, J. McClory","doi":"10.1177/15485129211031669","DOIUrl":"https://doi.org/10.1177/15485129211031669","url":null,"abstract":"Neutrons from an atmospheric nuclear explosion can be detected by sensors in orbit. Current tools for characterizing the neutron energy spectrum assume a known source and use forward transport to recreate the detector response. In realistic scenarios the true source is unknown, making this an inefficient, iterative approach. In contrast, the adjoint approach directly solves for the source spectrum, enabling source reconstruction. The time–energy fluence at the satellite and adjoint transport equation allow a Monte Carlo method to characterize the neutron source’s energy spectrum directly in a new model: the Space to High-Altitude Region Adjoint (SAHARA) model. A new adjoint source event estimator was developed in SAHARA to find feasible solutions to the neutron transport problem given the constraints of the adjoint environment. This work explores SAHARA’s development and performance for mono-energetic and continuous neutron energy sources. In general, the identified spectra were shifted towards energies approximately 5% lower than the true source spectra, but SAHARA was able to capture the correct spectral shapes. Continuous energy sources, including real-world sources Fat Man and Little Boy, resulted in identifiable spectra that could have been produced by the same distribution as the true sources as demonstrated by two-dimensional (2D) Kolmogorov–Smirnov tests.","PeriodicalId":44661,"journal":{"name":"Journal of Defense Modeling and Simulation-Applications Methodology Technology-JDMS","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73937268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Evaluation of unmanned aerial vehicle tactics through the metrics of survivability 基于生存性指标的无人机战术评价
IF 0.8 Q3 Engineering Pub Date : 2021-07-20 DOI: 10.1177/15485129211031672
Ian Lunsford, Thomas H. Bradley
Aircraft survivability is a classical consideration of combat aircraft design and tactical development, but the fundamental model of aircraft survivability must be updated to be able to consider modern tactical scenarios that are applicable to unmanned aircraft. This paper seeks therefore to define the set of design tradeoffs and an evaluation of the tactical effectiveness for unmanned aircraft survivability. Traditional and modern survivability evaluation methods are presented and integrated into a computational simulation to create a probabilistic evaluation of unmanned aircraft survivability. The results demonstrate the development of design tradeoffs for a hypothetical unmanned C-130J Hercules against a single man-portable air defense system. The discussion focuses on the demonstration of the utility of this survivability evaluation framework for consideration of survivability in unmanned aerial vehicle (UAV) design, the utility of considering survivability in the design of multi-UAV configurations (including the loyal wingman and swarms), and the value of the probabilistic survivability model for multi-aircraft simulations.
飞机生存能力是作战飞机设计和战术发展的经典考虑因素,但飞机生存能力的基本模型必须更新,以能够考虑适用于无人驾驶飞机的现代战术场景。因此,本文试图定义无人飞机生存能力的设计权衡和战术有效性评估。提出了传统的和现代的生存能力评估方法,并将其与计算仿真相结合,建立了无人机生存能力的概率评估方法。结果证明了假设的无人驾驶C-130J大力神对抗单兵便携式防空系统的设计权衡发展。重点讨论了该生存能力评估框架在无人机(UAV)设计中考虑生存能力的实用性,在多无人机配置(包括忠诚僚机和蜂群)设计中考虑生存能力的实用性,以及概率生存能力模型在多飞机仿真中的价值。
{"title":"Evaluation of unmanned aerial vehicle tactics through the metrics of survivability","authors":"Ian Lunsford, Thomas H. Bradley","doi":"10.1177/15485129211031672","DOIUrl":"https://doi.org/10.1177/15485129211031672","url":null,"abstract":"Aircraft survivability is a classical consideration of combat aircraft design and tactical development, but the fundamental model of aircraft survivability must be updated to be able to consider modern tactical scenarios that are applicable to unmanned aircraft. This paper seeks therefore to define the set of design tradeoffs and an evaluation of the tactical effectiveness for unmanned aircraft survivability. Traditional and modern survivability evaluation methods are presented and integrated into a computational simulation to create a probabilistic evaluation of unmanned aircraft survivability. The results demonstrate the development of design tradeoffs for a hypothetical unmanned C-130J Hercules against a single man-portable air defense system. The discussion focuses on the demonstration of the utility of this survivability evaluation framework for consideration of survivability in unmanned aerial vehicle (UAV) design, the utility of considering survivability in the design of multi-UAV configurations (including the loyal wingman and swarms), and the value of the probabilistic survivability model for multi-aircraft simulations.","PeriodicalId":44661,"journal":{"name":"Journal of Defense Modeling and Simulation-Applications Methodology Technology-JDMS","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83486089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
The role of unmanned aerial vehicles in military communications: application scenarios, current trends, and beyond 无人机在军事通信中的作用:应用场景,当前趋势,以及未来
IF 0.8 Q3 Engineering Pub Date : 2021-07-19 DOI: 10.1177/15485129211031668
M. Gargalakos
The role of unmanned aerial vehicles (UAVs) is becoming increasingly important for military conflicts. UAVs are more and more strongly considered as a force multiplier that could play a decisive role for the final outcome of an ambiguous battle. While the role of UAVs for Identification/Surveillance/Reconnaissance missions has been well established within many modern armies, their contribution to the upgrade or the restoration of military communications is still vague. In the current paper we review the current situation in military communications utilizing UAV platforms, and we also explore its future trends and capabilities taking into consideration the parallel developments in the civil UAV manufacturing sector involving UAV swarms and fifth-generation networks. Furthermore, a set of realistic combat scenarios involving the utilization of UAVs as a multipurpose communication node is presented and discussed, highlighting its critical role as a catalyst for the successful accomplishment of diverse military missions.
无人机在军事冲突中的作用越来越重要。无人机越来越被认为是一种力量倍增器,可以在一场模糊不清的战斗的最终结果中发挥决定性作用。虽然无人机在识别/监视/侦察任务中的作用已经在许多现代军队中得到了很好的确立,但它们对军事通信升级或恢复的贡献仍然模糊不清。在本文中,我们回顾了利用无人机平台进行军事通信的现状,并考虑到涉及无人机群和第五代网络的民用无人机制造领域的平行发展,探讨了其未来趋势和能力。此外,提出并讨论了一组涉及利用无人机作为多用途通信节点的现实战斗场景,强调了其作为成功完成各种军事任务的催化剂的关键作用。
{"title":"The role of unmanned aerial vehicles in military communications: application scenarios, current trends, and beyond","authors":"M. Gargalakos","doi":"10.1177/15485129211031668","DOIUrl":"https://doi.org/10.1177/15485129211031668","url":null,"abstract":"The role of unmanned aerial vehicles (UAVs) is becoming increasingly important for military conflicts. UAVs are more and more strongly considered as a force multiplier that could play a decisive role for the final outcome of an ambiguous battle. While the role of UAVs for Identification/Surveillance/Reconnaissance missions has been well established within many modern armies, their contribution to the upgrade or the restoration of military communications is still vague. In the current paper we review the current situation in military communications utilizing UAV platforms, and we also explore its future trends and capabilities taking into consideration the parallel developments in the civil UAV manufacturing sector involving UAV swarms and fifth-generation networks. Furthermore, a set of realistic combat scenarios involving the utilization of UAVs as a multipurpose communication node is presented and discussed, highlighting its critical role as a catalyst for the successful accomplishment of diverse military missions.","PeriodicalId":44661,"journal":{"name":"Journal of Defense Modeling and Simulation-Applications Methodology Technology-JDMS","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79214348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
The wargame commodity course of action automated analysis method 兵棋商品行动过程自动分析方法
IF 0.8 Q3 Engineering Pub Date : 2021-07-19 DOI: 10.1177/15485129211028318
William T. DeBerry, Richard Dill, K. Hopkinson, D. Hodson, M. Grimaila
This research presents the wargaming commodity course of action automated analysis method (WCCAAM) – a novel approach to assist wargame commanders in developing and analyzing courses of action (COAs) through semi-automation of the military decision making process (MDMP). MDMP is a seven-step iterative method that commanders and mission partners follow to build an operational course of action to achieve strategic objectives. MDMP requires time, resources, and coordination – all competing items the commander weighs to make the optimal decision. WCCAAM receives the MDMP’s Mission Analysis phase as input, converts the wargame into a directed graph, processes a multi-commodity flow algorithm on the nodes and edges, where the commodities represent units, and the nodes represent blue bases and red threats, and then programmatically processes the MDMP steps to output the recommended COA. To demonstrate its use, a military scenario developed in the Advanced Framework for Simulation, Integration, and Modeling (AFSIM) processes the various factors through WCCAAM and produces an optimal, minimal risk COA.
本研究提出了兵棋推演商品行动过程自动化分析方法(WCCAAM)——一种通过军事决策过程(MDMP)的半自动化来帮助兵棋推演指挥官开发和分析行动过程(COAs)的新方法。MDMP是一种七步迭代方法,指挥官和任务伙伴遵循该方法建立实现战略目标的作战行动方针。MDMP需要时间、资源和协调——所有相互竞争的项目都需要指挥官权衡以做出最佳决策。WCCAAM接收MDMP的任务分析阶段作为输入,将兵棋游戏转换为有向图,在节点和边缘上处理多商品流算法,其中商品代表单位,节点代表蓝色基地和红色威胁,然后通过编程处理MDMP步骤以输出推荐的COA。为了演示其用途,在模拟、集成和建模高级框架(AFSIM)中开发的军事场景通过WCCAAM处理各种因素,并产生最佳的、最小风险的COA。
{"title":"The wargame commodity course of action automated analysis method","authors":"William T. DeBerry, Richard Dill, K. Hopkinson, D. Hodson, M. Grimaila","doi":"10.1177/15485129211028318","DOIUrl":"https://doi.org/10.1177/15485129211028318","url":null,"abstract":"This research presents the wargaming commodity course of action automated analysis method (WCCAAM) – a novel approach to assist wargame commanders in developing and analyzing courses of action (COAs) through semi-automation of the military decision making process (MDMP). MDMP is a seven-step iterative method that commanders and mission partners follow to build an operational course of action to achieve strategic objectives. MDMP requires time, resources, and coordination – all competing items the commander weighs to make the optimal decision. WCCAAM receives the MDMP’s Mission Analysis phase as input, converts the wargame into a directed graph, processes a multi-commodity flow algorithm on the nodes and edges, where the commodities represent units, and the nodes represent blue bases and red threats, and then programmatically processes the MDMP steps to output the recommended COA. To demonstrate its use, a military scenario developed in the Advanced Framework for Simulation, Integration, and Modeling (AFSIM) processes the various factors through WCCAAM and produces an optimal, minimal risk COA.","PeriodicalId":44661,"journal":{"name":"Journal of Defense Modeling and Simulation-Applications Methodology Technology-JDMS","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84861398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
期刊
Journal of Defense Modeling and Simulation-Applications Methodology Technology-JDMS
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1