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Fixed-time distributed average consensus tracking for multiple Euler-Lagrange systems
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作者 SUN Guhao ZENG Qingshuang CAI Zhongze 《Journal of Systems Engineering and Electronics》 2025年第2期523-536,共14页
This paper investigates the sliding-mode-based fixed-time distributed average tracking (DAT) problem for multiple Euler-Lagrange systems in the presence of external distur-bances. The primary objective is to devise co... This paper investigates the sliding-mode-based fixed-time distributed average tracking (DAT) problem for multiple Euler-Lagrange systems in the presence of external distur-bances. The primary objective is to devise controllers for each agent, enabling them to precisely track the average of multiple time-varying reference signals. By averaging these signals, we can mitigate the influence of errors and uncertainties arising dur-ing measurements, thereby enhancing the robustness and stabi-lity of the system. A distributed fixed-time average estimator is proposed to estimate the average value of global reference sig-nals utilizing local information and communication with neigh-bors. Subsequently, a fixed-time sliding mode controller is intro-duced incorporating a state-dependent sliding mode function coupled with a variable exponent coefficient to achieve dis-tributed average tracking of reference signals, and rigorous ana-lytical methods are employed to substantiate the fixed-time sta-bility. Finally, numerical simulation results are provided to vali-date the effectiveness of the proposed methodology, offering insights into its practical application and robust performance. 展开更多
关键词 distributed average tracking(DAT) fixed-time con-vergence Euler-Lagrange systems sliding mode control
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生物序列比对动态规划算法的统一形式化构造与Isabelle验证
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作者 石海鹤 蓝孙文 +3 位作者 刘日明 石海鹏 王岚 钟林辉 《计算机研究与发展》 北大核心 2025年第1期119-131,共13页
序列比对是生物序列分析中的一个经典问题,旨在找出序列之间的相似性,它对于发现生物序列中的功能、结构和进化信息都具有重要的意义.该问题可分为双序列比对和多序列比对2类,现有工作多针对特定算法展开,没有设计通用的求解方法;此外,... 序列比对是生物序列分析中的一个经典问题,旨在找出序列之间的相似性,它对于发现生物序列中的功能、结构和进化信息都具有重要的意义.该问题可分为双序列比对和多序列比对2类,现有工作多针对特定算法展开,没有设计通用的求解方法;此外,甚少涉及算法可信性的研究.从生物序列比对问题的形式化规约出发,通过深入分析问题的性质,刻画问题求解的本质特征,借助形式化方法PAR(partition andrecursion)设计了序列比对动态规划算法的统一构造框架seqAlign;展示了应用该框架构造序列数为3的多序列比对算法的过程,并使用Isabelle定理证明器对构造结果进行形式化验证;利用PAR平台生成了该算法的C++可执行程序,进一步分析了由seqAlign框架机械化构造其他类型序列比对算法的过程.通过严密的规约精化和形式验证,有效地保证了生成算法的可信性;开发的seqAlign框架提供了序列比对问题类的通用求解方案,显著提高了序列比对算法族生成的效率.研究结果在生物序列分析中序列比对问题上的成功应用,从方法学和实践上可为复杂生物信息学领域高可靠算法的构造提供参考. 展开更多
关键词 序列比对 PAR方法 形式构造 isabelle定理证明器
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基于复数域卷积神经网络的ISAR包络对齐方法研究 被引量:1
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作者 王勇 夏浩然 刘明帆 《信号处理》 北大核心 2025年第3期409-425,共17页
在逆合成孔径雷达(Inverse Synthetic Aperture Radar,ISAR)成像领域,运动补偿是确保高质量图像生成的关键环节。包络对齐(Range Alignment,RA)作为运动补偿的首要步骤,对于校正由平动分量引起的回波信号包络偏移至关重要。本文提出了... 在逆合成孔径雷达(Inverse Synthetic Aperture Radar,ISAR)成像领域,运动补偿是确保高质量图像生成的关键环节。包络对齐(Range Alignment,RA)作为运动补偿的首要步骤,对于校正由平动分量引起的回波信号包络偏移至关重要。本文提出了一种基于复数域卷积神经网络(Complex-Valued Convolutional Neural Network,CVCNN)的包络对齐新方法,旨在通过深度学习策略提升包络对齐的精度与计算效率。本文所提方法利用了卷积神经网络强大的特征学习能力,构建了一个能够映射一维距离像与包络补偿量之间复杂关系的模型。通过将传统的实值卷积神经网络拓展至复数域,不仅完整保留了回波信号中的相位信息,而且有效引入了复数域残差块及线性连接机制,进一步精细化了网络结构设计。这种架构改进使得所提算法能实现低信噪比(Signal-to-Noise Ratio,SNR)条件下对ISAR距离像的高效包络对齐。在数据生成方面,本文基于雷达仿真参数,通过成像模拟仿真构建了ISAR回波数据集。该数据集经过归一化处理后,输入网络进行训练,使网络能够学习从未对齐回波到对应补偿量的映射关系。本文所提方法采用迁移学习策略,对基于仿真数据预训练的模型进行微调,以适应实测数据。这一策略不仅增强了结果的可靠性,同时也大幅缩短了模型的迭代周期。在实验验证方面,本文采用仿真与实测数据进行综合测试,以包络对齐精度、成像结果质量和计算效率为评价指标,全面验证了算法的有效性。实验结果表明,在不同信噪比条件下,本文所提方法均展现出了优越的包络对齐性能,进而可以实现高质量成像,同时在计算效率上也具有显著优势。 展开更多
关键词 逆合成孔径雷达 包络对齐 复数域卷积神经网络 有监督学习
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Modelling of internal ballistics of gun systems:A review 被引量:1
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作者 F.Ongaro C.Robbe +2 位作者 A.Papy B.Stirbu A.Chabotier 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2024年第11期35-58,共24页
A deep understanding of the internal ballistic process and the factors affecting it is of primary importance to efficiently design a gun system and ensure its safe management. One of the main goals of internal ballist... A deep understanding of the internal ballistic process and the factors affecting it is of primary importance to efficiently design a gun system and ensure its safe management. One of the main goals of internal ballistics is to estimate the gas pressure into the combustion chamber and the projectile muzzle velocity in order to use the propellant to its higher efficiency while avoiding over-pressure phenomena. Dealing with the internal ballistic problem is a complex undertaking since it requires handling the interaction between different constituents during a transient time lapse with very steep rise of pressure and temperature. Several approaches have been proposed in the literature, based on different assumptions and techniques. Generally, depending on the used mathematical framework, they can be classified into two categories: computational fluid dynamics-based models and lumped-parameter ones. By focusing on gun systems, this paper offers a review of the main contributions in the field by mentioning their advantages and drawbacks. An insight into the limitations of the currently available modelling strategies is provided,as well as some considerations on the choice of one model over another. Lumped-parameter models, for example, are a good candidate for performing parametric analysis and optimisation processes of gun systems, given their minimum requirements of computer resources. Conversely, CFD-based models have a better capacity to address more sophisticated phenomena like pressure waves and turbulent flow effects. The performed review also reveals that too little attention has been given to small calibre guns since the majority of currently available models are conceived for medium and large calibre gun systems.Similarly, aspects like wear phenomena, bore deformations or projectile-barrel interactions still need to be adequately addressed and our suggestion is to dedicate more effort on it. 展开更多
关键词 Internal ballistics Numerical modelling Lumped-parameter model Computational fluid dynamics Gun systems
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Composite armor philosophy(CAP):Holistic design methodology of multi-layered composite protection systems for armored vehicles
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作者 Evangelos Ch.Tsirogiannis Foivos Psarommatis +1 位作者 Alexandros Prospathopoulos Georgios Savaidis 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2024年第11期181-197,共17页
A philosophy for the design of novel,lightweight,multi-layered armor,referred to as Composite Armor Philosophy(CAP),which can adapt to the passive protection of light-,medium-,and heavy-armored vehicles,is presented i... A philosophy for the design of novel,lightweight,multi-layered armor,referred to as Composite Armor Philosophy(CAP),which can adapt to the passive protection of light-,medium-,and heavy-armored vehicles,is presented in this study.CAP can serve as a guiding principle to assist designers in comprehending the distinct roles fulfilled by each component.The CAP proposal comprises four functional layers,organized in a suggested hierarchy of materials.Particularly notable is the inclusion of a ceramic-composite principle,representing an advanced and innovative solution in the field of armor design.This paper showcases real-world defense industry applications,offering case studies that demonstrate the effectiveness of this advanced approach.CAP represents a significant milestone in the history of passive protection,marking an evolutionary leap in the field.This philosophical approach provides designers with a powerful toolset with which to enhance the protection capabilities of military vehicles,making them more resilient and better equipped to meet the challenges of modern warfare. 展开更多
关键词 Passive armor protection Composite armor Ballistic performance Protection systems Vehicle protection Armor design
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基于CRISPR-Cas系统的多重耐药菌防治技术研究进展 被引量:1
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作者 周倩 唐梦君 +4 位作者 张小燕 陆俊贤 唐修君 杨星星 高玉时 《生物技术通报》 北大核心 2025年第5期42-51,共10页
动物源细菌耐药性影响动物养殖安全,同时对人类公共卫生和食品安全产生重要威胁。抗生素的滥用加剧了耐药细菌的传播,而新型抗菌药物研发日益困难,动物源细菌耐药污染已成为全球范围内的公共危机,一旦耐药菌从动物向人类扩散,将极大地... 动物源细菌耐药性影响动物养殖安全,同时对人类公共卫生和食品安全产生重要威胁。抗生素的滥用加剧了耐药细菌的传播,而新型抗菌药物研发日益困难,动物源细菌耐药污染已成为全球范围内的公共危机,一旦耐药菌从动物向人类扩散,将极大地威胁人类健康,亟须新的方法和策略应对细菌耐药。CRISPR-Cas(clustered regularly interspaced short palindromic repeats,CRISPR-associated)是第三代“基因组定点编辑技术”,该技术能够靶向剪切外源性核酸,保护微生物遗传物质遗传稳定性。与传统的多重耐药菌防治策略相比,CRISPR-Cas系统具备独特的DNA序列的靶向性和灵敏度,通过精准、简便和高效的基因编辑技术,与核酸扩增技术、比色技术等相结合,可以提高灵敏度和检测时效性等性能指标。本文介绍了CRISPR-Cas系统的由来、系统分类、基因编辑的作用机理,在此基础之上,聚焦于该系统在多重耐药菌防治领域的研究进展和应用,在耐药致病菌消除、耐药基因消除以及致病菌诊断检测方面给出案例分析以及目前存在的挑战。总的来说,基于CRISPR-Cas系统的序列特异性抗菌剂能够降低细菌多重耐药性,结合核酸扩增技术和实时监控设备提升检测的精准性和效率,为动物源细菌耐药防控和监测研究提供了新思路。 展开更多
关键词 CRisPR-Cas系统 基因编辑 多重耐药菌 耐药基因 防治技术
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基于GIS与随机森林算法的湖北田歌孕育地理分布区域模型研究 被引量:2
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作者 范元玲 曾艳 +5 位作者 朱有晨 潘明辰 王京 田洁 杨子锐 冀琴 《北京师范大学学报(自然科学版)》 北大核心 2025年第3期418-428,共11页
对湖北田歌的分布与田歌孕育的地理环境之间的关系进行了探究,以期为区域音乐的实证研究提供新的思路和方法.以湖北田歌为研究对象,选取1 248个田歌样本数据集,运用地理信息系统(geographic information system,GIS)对初步选定的田歌分... 对湖北田歌的分布与田歌孕育的地理环境之间的关系进行了探究,以期为区域音乐的实证研究提供新的思路和方法.以湖北田歌为研究对象,选取1 248个田歌样本数据集,运用地理信息系统(geographic information system,GIS)对初步选定的田歌分布及音乐要素影响因子进行建库,基于随机森林及可解释性算法(shapley additive explanations,SHAP)构建田歌影响因子体系分析模型,通过受试者工作特性曲线(receiver operating characteristic curve,ROC)对模型的有效性进行评价,分析田歌的分布、音乐要素与地理环境之间的关系.研究结果表明:1)基于随机森林构建的田歌影响因子体系模型预测效果较好,其曲线下面积(area under the curve,AUC)的值为0.82;2)对田歌产生及音乐要素影响因子重要性排序得出,多年平均降雨量和多年平均气温是孕育湖北田歌的主要因子.其随机森林及SHAP算法,能在一定程度上预测湖北田歌分布格局,对区域音乐文化与地理关联性研究具有重要意义. 展开更多
关键词 田歌 地理信息系统 机器学习 SHAP 随机森林模型
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CRISPR/Cas9技术(递送)在支气管上皮细胞中的应用和进展
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作者 张莹莹 王楚雯 钱国清 《中国病理生理杂志》 北大核心 2025年第1期173-180,共8页
规律成簇间隔短回文重复序列(CRISPR)/CRISPR相关蛋白9(Cas9)技术操作简易、高效,适用性强,在探究呼吸道潜在机制中具有独特优势。支气管上皮细胞是肺部防御的物理屏障,其损伤或功能缺失是慢性气道疾病的发病基础。近年来,慢性气道疾病... 规律成簇间隔短回文重复序列(CRISPR)/CRISPR相关蛋白9(Cas9)技术操作简易、高效,适用性强,在探究呼吸道潜在机制中具有独特优势。支气管上皮细胞是肺部防御的物理屏障,其损伤或功能缺失是慢性气道疾病的发病基础。近年来,慢性气道疾病发病率升高,但治疗进展相对缓慢,亟需找到治疗的突破口。CRISPR/Cas9系统可以进行精准基因编辑,为慢性气道疾病提供新策略。本文从CRISPR/Cas9的多种递送方式和作用机制出发,对其在原代、永生化支气管上皮细胞和动物体内的应用与进展进行概述,探讨了其发展前景和面临的挑战,以期为未来应用该技术进行气道疾病治疗提供参考。 展开更多
关键词 CRisPR/Cas9系统 支气管上皮细胞 基因编辑
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Learning the parameters of a class of stochastic Lotka-Volterra systems with neural networks
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作者 WANG Zhanpeng WANG Lijin 《中国科学院大学学报(中英文)》 北大核心 2025年第1期20-25,共6页
In this paper,we propose a neural network approach to learn the parameters of a class of stochastic Lotka-Volterra systems.Approximations of the mean and covariance matrix of the observational variables are obtained f... In this paper,we propose a neural network approach to learn the parameters of a class of stochastic Lotka-Volterra systems.Approximations of the mean and covariance matrix of the observational variables are obtained from the Euler-Maruyama discretization of the underlying stochastic differential equations(SDEs),based on which the loss function is built.The stochastic gradient descent method is applied in the neural network training.Numerical experiments demonstrate the effectiveness of our method. 展开更多
关键词 stochastic Lotka-Volterra systems neural networks Euler-Maruyama scheme parameter estimation
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约束Herglotz方程的代数结构与非保守系统的Poisson积分理论
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作者 张毅 王文静 《力学学报》 北大核心 2025年第6期1469-1479,共11页
无论完整或非完整约束系统,如果存在非保守力,则这些系统的方程一般不具有Lie代数结构,从而经典Poisson积分理论只能部分地应用于这些系统的积分问题.通过Herglotz原理可导出非保守系统的一类动力学方程,即Herglotz方程.研究Herglotz方... 无论完整或非完整约束系统,如果存在非保守力,则这些系统的方程一般不具有Lie代数结构,从而经典Poisson积分理论只能部分地应用于这些系统的积分问题.通过Herglotz原理可导出非保守系统的一类动力学方程,即Herglotz方程.研究Herglotz方程的代数结构,进而建立其Poisson积分理论,对于深入探寻非保守系统的动力学特性具有重要意义.文章研究Herglotz方程的代数结构,进而建立非保守系统的Poisson理论,包括完整和非完整情形.首先,针对完整非保守系统,建立其Herglotz方程,引入积分因子将方程化为逆变代数形式,证明其具有Lie代数结构,从而Poisson理论可全部地应用于该系统.其次,针对非完整非保守系统,建立其约束Herglotz方程,利用积分因子将方程化为部分正则的逆变代数形式,证明约束Herglotz方程具有Lie容许代数结构,进而建立非完整非保守系统的Poisson理论.若非完整非保守系统实现自由运动,则约束Herglotz方程具有Lie代数结构,Poisson理论仍可全部地应用于该系统.文中以某非线性方程系统,受均匀和各向同性瑞利耗散力作用的在粗糙水平面上作纯滚动的圆球,以及受黏性阻尼的Appell-Hamel问题为例,分析了约束Herglotz方程的代数结构并演示所述Poisson理论的应用. 展开更多
关键词 非保守系统 约束Herglotz 方程 代数结构 POisSON 理论
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Modifying the pore structure of biomass-derived porous carbon for use in energy storage systems
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作者 XIE Bin ZHAO Xin-ya +5 位作者 MA Zheng-dong ZHANG Yi-jian DONG Jia-rong WANG Yan BAI Qiu-hong SHEN Ye-hua 《新型炭材料(中英文)》 北大核心 2025年第4期870-888,共19页
The development of sustainable electrode materials for energy storage systems has become very important and porous carbons derived from biomass have become an important candidate because of their tunable pore structur... The development of sustainable electrode materials for energy storage systems has become very important and porous carbons derived from biomass have become an important candidate because of their tunable pore structure,environmental friendliness,and cost-effectiveness.Recent advances in controlling the pore structure of these carbons and its relationship between to is energy storage performance are discussed,emphasizing the critical role of a balanced distribution of micropores,mesopores and macropores in determining electrochemical behavior.Particular attention is given to how the intrinsic components of biomass precursors(lignin,cellulose,and hemicellulose)influence pore formation during carbonization.Carbonization and activation strategies to precisely control the pore structure are introduced.Finally,key challenges in the industrial production of these carbons are outlined,and future research directions are proposed.These include the establishment of a database of biomass intrinsic structures and machine learning-assisted pore structure engineering,aimed at providing guidance for the design of high-performance carbon materials for next-generation energy storage devices. 展开更多
关键词 Energy storage systems Porous carbon Biomass precursors Pore structure Machine learning-assisted
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智慧农场发展水平评价 ——基于FUCOM与马氏距离TOPSIS的实证研究
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作者 林悦 吴勇 俞荟 《安徽农业科学》 2025年第18期236-242,共7页
从资源基础、关键能力、绩效产出3个维度构建了智慧农场发展水平评价体系,采用FUCOM,即完全一致法确定18个三级指标的权重,运用加权马氏距离型TOPSIS模型对安徽省6家典型智慧农场进行实证评价。结果显示,关键能力是衡量智慧农场发展水... 从资源基础、关键能力、绩效产出3个维度构建了智慧农场发展水平评价体系,采用FUCOM,即完全一致法确定18个三级指标的权重,运用加权马氏距离型TOPSIS模型对安徽省6家典型智慧农场进行实证评价。结果显示,关键能力是衡量智慧农场发展水平最重要的维度,农情自动检测、高标准农田比例等7个指标对智慧农场整体发展水平影响较大。建议加快高标准农田建设,提高物联网设备配置;提升关键能力,增加绩效产出,同时统筹推进品牌建设,强化产业链智慧监管。 展开更多
关键词 智慧农场 FUCOM 评价指标体系 马氏距离TOPSis
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多变流器并网系统的SISO dq阻抗稳定性判据及闭环极点灵敏度分析 被引量:1
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作者 刘欣 吴柳颖 +2 位作者 贾焦心 王利桐 邓昊 《电工技术学报》 北大核心 2025年第11期3427-3445,共19页
随着新能源渗透率的不断提高,以同步发电机为主的传统电力系统正向以多样化电力电子装备为主的新型电力系统转变,多变流器并网系统的小干扰稳定性问题受到广泛关注。然而,状态空间法和传统阻抗法在分析多变流器系统稳定性时仍存在复杂... 随着新能源渗透率的不断提高,以同步发电机为主的传统电力系统正向以多样化电力电子装备为主的新型电力系统转变,多变流器并网系统的小干扰稳定性问题受到广泛关注。然而,状态空间法和传统阻抗法在分析多变流器系统稳定性时仍存在复杂度高及难以准确评估闭环极点关于各变流器灵敏度的问题。针对上述问题,该文首先提出一种用于分析多变流器并网系统小干扰稳定性的单输入单输出(SISO)dq阻抗判据,该判据可将多输入多输出系统(MIMO)转换为若干SISO系统以简化稳定性分析过程,相比于MIMO系统分析方法,其在避免求解高维矩阵特征值的同时降低了奈奎斯特曲线分析的复杂度,同时该方法还具有从物理角度揭示振荡失稳机理的优点。然后,基于所提出的稳定性判据公式,进一步提出一种用于求取闭环极点关于各变流器阻抗/导纳灵敏度的分析方法,该方法可有效评估系统中不同变流器对振荡模态的影响程度,有助于实现诱发系统振荡的主导变流器的辨识。最后,通过Matlab/Simulink仿真和硬件在环实验验证了所提方法的正确性。 展开更多
关键词 多变流器并网系统 SisO dq阻抗模型 小干扰稳定性 灵敏度分析
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A New Technique for Constructing Higher-order Iterative Methods to Solve Nonlinear Systems
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作者 XIAO Xiaoyong 《应用数学》 北大核心 2025年第3期762-774,共13页
In this paper,a new technique is introduced to construct higher-order iterative methods for solving nonlinear systems.The order of convergence of some iterative methods can be improved by three at the cost of introduc... In this paper,a new technique is introduced to construct higher-order iterative methods for solving nonlinear systems.The order of convergence of some iterative methods can be improved by three at the cost of introducing only one additional evaluation of the function in each step.Furthermore,some new efficient methods with a higher-order of convergence are obtained by using only a single matrix inversion in each iteration.Analyses of convergence properties and computational efficiency of these new methods are made and testified by several numerical problems.By comparison,the new schemes are more efficient than the corresponding existing ones,particularly for large problem sizes. 展开更多
关键词 systems of nonlinear equation Order of convergence Higher-order method Extended Newton iteration Computational efficiency
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基于AIS和波浪数据的船舶碳排放计算
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作者 崔秀芳 赖炜祺 +1 位作者 林浩涛 邵志鹏 《环境科学与技术》 北大核心 2025年第1期192-200,共9页
随着全球贸易运输的增长,航运业面临着日趋严峻的碳排放问题。为了更精准地估算船舶在海上巡航时的碳排放量,该文提出了一种基于船舶自动识别系统(AIS)数据和波浪数据的碳排放计算模型。该模型利用波浪数据计算波浪阻力,从而更准确地修... 随着全球贸易运输的增长,航运业面临着日趋严峻的碳排放问题。为了更精准地估算船舶在海上巡航时的碳排放量,该文提出了一种基于船舶自动识别系统(AIS)数据和波浪数据的碳排放计算模型。该模型利用波浪数据计算波浪阻力,从而更准确地修正船舶航行总阻力,通过实验数据验证了阻力计算的准确性,并根据计算主机的能耗,进一步估算船舶的二氧化碳排放量。结合2022年7-9月美国近海域超过5 000总吨的商船的AIS船舶数据,计算出船舶航行二氧化碳排放总量为268.91万t,其中货船的二氧化碳排放总量最多,贡献了181.92万t的碳排量,客船和油轮次之,分别为31.45万t和55.55万t,并根据此计算结果绘制了商船碳排放时空分布图,揭示了不同类型船舶在不同时空下的碳排放特征和规律。该研究对航运业的绿色转型以及提升环保意识具有重要的参考价值,也为海运业的碳排放管理提供了强有力的数据支持。 展开更多
关键词 自动识别系统 波浪数据 二氧化碳排放 船舶污染
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Realizing high-speed target tracking by using multi-rate feedforward predictive control for the acquisition, tracking, and pointing system
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作者 Hang Li Gaoliang Peng +4 位作者 Xiaobiao Shan Mingyuan Zhao Wei Zhang Jinghan Wang Feng Cheng 《Defence Technology(防务技术)》 2025年第7期137-151,共15页
The acquisition,tracking,and pointing(ATP)system is widely used in target tracking,counter-UAV operations,and other related fields.As UAV technology develops,there is a growing demand to enhance the tracking capabilit... The acquisition,tracking,and pointing(ATP)system is widely used in target tracking,counter-UAV operations,and other related fields.As UAV technology develops,there is a growing demand to enhance the tracking capabilities of ATP systems.However,in practical applications,ATP systems face various design constraints and functional limitations,making it infeasible to indefinitely improve hardware performance to meet tracking requirements.As a result,tracking algorithms are required to execute increasingly complex tasks.This study introduces a multi-rate feedforward predictive controller to address issues such as low image feedback frequency and significant delays in ATP systems,which lead to tracking jitter,poor tracking performance,low precision,and target loss.At the same time,the pro-posed approach aims to improve the tracking capabilities of ATP systems for high-speed and highly maneuverable targets under conditions of low sampling feedback rates and high feedback delays.The method suggested is also characterized by its low order,fast response,and robustness to model parameter variations.In this study,an actual ATP system is built for target tracking test,and the proposed algorithm is fully validated in terms of simulation and actual system application verification.Results from both simulations and experiments demonstrate that the method effectively compensates for delays and low sampling rates.For targets with relative angular velocities ranging from 0 to 90°/s and angular accelerations between 0 and 470°/s^(2),the system improved tracking accuracy by 70.0%-89.9%at a sampling frequency of 50 Hz and a delay of 30 m s.Moreover,the compensation algorithm demonstrated consistent performance across actuators with varying characteristics,further confirming its robustness to model insensitivity.In summary,the proposed algorithm considerably enhances the tracking accuracy and capability of ATP systems for high-speed and highly maneuverable targets,reducing the probability of target loss from high speed.This approach offers a practical solution for future multi-target tracking across diverse operational scenarios. 展开更多
关键词 Multi-rate systems Predictive feedforward control Target tracking Laser weapon
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Formation-containment control for nonholonomic multi-agent systems with a desired trajectory constraint
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作者 GU Xueqiang LU Lina +1 位作者 XIANG Fengtao ZHANG Wanpeng 《Journal of Systems Engineering and Electronics》 2025年第1期256-268,共13页
This paper addresses the time-varying formation-containment(FC) problem for nonholonomic multi-agent systems with a desired trajectory constraint, where only the leaders can acquire information about the desired traje... This paper addresses the time-varying formation-containment(FC) problem for nonholonomic multi-agent systems with a desired trajectory constraint, where only the leaders can acquire information about the desired trajectory. Input the fixed time-varying formation template to the leader and start executing, this process also needs to track the desired trajectory, and the follower needs to converge to the convex hull that the leader crosses. Firstly, the dynamic models of nonholonomic systems are linearized to second-order dynamics. Then, based on the desired trajectory and formation template, the FC control protocols are proposed. Sufficient conditions to achieve FC are introduced and an algorithm is proposed to resolve the control parameters by solving an algebraic Riccati equation. The system is demonstrated to achieve FC, with the average position and velocity of the leaders converging asymptotically to the desired trajectory. Finally, the theoretical achievements are verified in simulations by a multi-agent system composed of virtual human individuals. 展开更多
关键词 multi-agent systems nonholonomic dynamics formation-containment(FC)control desired trajectory constrains
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Evolving adaptive and interpretable decision trees for cooperative submarine search
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作者 Yang Gao Yue Wang +3 位作者 Lingyun Tian Xiaotong Hong Chao Xue Dongguang Li 《Defence Technology(防务技术)》 2025年第6期83-94,共12页
System upgrades in unmanned systems have made Unmanned Aerial Vehicle(UAV)-based patrolling and monitoring a preferred solution for ocean surveillance.However,dynamic environments and large-scale deployments pose sign... System upgrades in unmanned systems have made Unmanned Aerial Vehicle(UAV)-based patrolling and monitoring a preferred solution for ocean surveillance.However,dynamic environments and large-scale deployments pose significant challenges for efficient decision-making,necessitating a modular multiagent control system.Deep Reinforcement Learning(DRL)and Decision Tree(DT)have been utilized for these complex decision-making tasks,but each has its limitations:DRL is highly adaptive but lacks interpretability,while DT is inherently interpretable but has limited adaptability.To overcome these challenges,we propose the Adaptive Interpretable Decision Tree(AIDT),an evolutionary-based algorithm that is both adaptable to diverse environmental settings and highly interpretable in its decision-making processes.We first construct a Markov decision process(MDP)-based simulation environment using the Cooperative Submarine Search task as a representative scenario for training and testing the proposed method.Specifically,we use the heat map as a state variable to address the issue of multi-agent input state proliferation.Next,we introduce the curiosity-guiding intrinsic reward to encourage comprehensive exploration and enhance algorithm performance.Additionally,we incorporate decision tree size as an influence factor in the adaptation process to balance task completion with computational efficiency.To further improve the generalization capability of the decision tree,we apply a normalization method to ensure consistent processing of input states.Finally,we validate the proposed algorithm in different environmental settings,and the results demonstrate both its adaptability and interpretability. 展开更多
关键词 Cooperative decision making Interpretable decision trees Cooperative submarine search Maritime unmanned systems
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UAF-based integration of design and simulation model for system-of-systems
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作者 FENG Yimin GE Ping +2 位作者 SHAO Yanli ZOU Qiang LIU Yusheng 《Journal of Systems Engineering and Electronics》 2025年第1期108-126,共19页
Model-based system-of-systems(SOS)engineering(MBSoSE)is becoming a promising solution for the design of SoS with increasing complexity.However,bridging the models from the design phase to the simulation phase poses si... Model-based system-of-systems(SOS)engineering(MBSoSE)is becoming a promising solution for the design of SoS with increasing complexity.However,bridging the models from the design phase to the simulation phase poses significant challenges and requires an integrated approach.In this study,a unified requirement modeling approach is proposed based on unified architecture framework(UAF).Theoretical models are proposed which compose formalized descriptions from both topdown and bottom-up perspectives.Based on the description,the UAF profile is proposed to represent the SoS mission and constituent systems(CS)goal.Moreover,the agent-based simulation information is also described based on the overview,design concepts,and details(ODD)protocol as the complement part of the SoS profile,which can be transformed into different simulation platforms based on the eXtensible markup language(XML)technology and model-to-text method.In this way,the design of the SoS is simulated automatically in the early design stage.Finally,the method is implemented and an example is given to illustrate the whole process. 展开更多
关键词 model-based systems engineering unified architecture framework(UAF) system-of-systems engineering model transformation SIMULATION
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Disintegration of heterogeneous combat network based on double deep Q-learning
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作者 CHEN Wenhao CHEN Gang +1 位作者 LI Jichao JIANG Jiang 《Journal of Systems Engineering and Electronics》 2025年第5期1235-1246,共12页
The rapid development of military technology has prompted different types of equipment to break the limits of operational domains and emerged through complex interactions to form a vast combat system of systems(CSoS),... The rapid development of military technology has prompted different types of equipment to break the limits of operational domains and emerged through complex interactions to form a vast combat system of systems(CSoS),which can be abstracted as a heterogeneous combat network(HCN).It is of great military significance to study the disintegration strategy of combat networks to achieve the breakdown of the enemy’s CSoS.To this end,this paper proposes an integrated framework called HCN disintegration based on double deep Q-learning(HCN-DDQL).Firstly,the enemy’s CSoS is abstracted as an HCN,and an evaluation index based on the capability and attack costs of nodes is proposed.Meanwhile,a mathematical optimization model for HCN disintegration is established.Secondly,the learning environment and double deep Q-network model of HCN-DDQL are established to train the HCN’s disintegration strategy.Then,based on the learned HCN-DDQL model,an algorithm for calculating the HCN’s optimal disintegration strategy under different states is proposed.Finally,a case study is used to demonstrate the reliability and effectiveness of HCNDDQL,and the results demonstrate that HCN-DDQL can disintegrate HCNs more effectively than baseline methods. 展开更多
关键词 heterogeneous combat network(HCN) combat system of systems(CSoS) network disintegration reinforcement learning
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