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窄带高功率微波对裸露线缆的耦合特性仿真

现代应用物理 2023年第3期14卷 150-156,176页

作者：董昱青韩玉兵高成南京理工大学电子工程与光电技术学院南京210094

针对窄带高功率微波(narrowband high power microwave,NHPM)辐照下线缆面临干扰的问题。基于CST仿真软件,建立了线缆仿真模型,模拟了NHPM辐照下裸露线缆的耦合响应特性。仿真计算了不同中心频率、不同脉冲宽度的4种NHPM对不同长度裸露... 详细信息

针对窄带高功率微波(narrowband high power microwave,NHPM)辐照下线缆面临干扰的问题。基于CST仿真软件,建立了线缆仿真模型,模拟了NHPM辐照下裸露线缆的耦合响应特性。仿真计算了不同中心频率、不同脉冲宽度的4种NHPM对不同长度裸露线缆耦合特性的影响,及不同线缆长度对耦合特性的影响。仿真结果表明:裸线缆耦合电压峰值随裸线缆长度的增加而增加,最终稳定在一个区间内;裸线缆长度为一些特定值时,会出现耦合电压波形失真的现象。本研究为线缆的防护设计提供了依据,也为其他线缆耦合仿真实验提供参考。

关键词：线缆高功率微波窄带耦合特性电磁防护

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基于视觉变换网络的音乐流派自动分类

计算机应用 2022年第S1期42卷 54-58页

作者：董安明刘宗银禹继国韩玉冰周酉齐鲁工业大学大数据研究院济南250353 齐鲁工业大学数学与统计学院济南250353 齐鲁工业大学计算机科学与技术学院济南250353 山东海看新媒体研究院有限公司济南250013

随着网络音乐产业的快速发展,构筑音乐自动检索和分类系统的需求日益增加。利用计算机对音乐流派进行正确标注是实现音乐类型精准分类和保障音乐推荐系统性能的重要前提。针对卷积运算不具备提取全局表征的能力,深度卷积神经网络对音乐... 详细信息

随着网络音乐产业的快速发展,构筑音乐自动检索和分类系统的需求日益增加。利用计算机对音乐流派进行正确标注是实现音乐类型精准分类和保障音乐推荐系统性能的重要前提。针对卷积运算不具备提取全局表征的能力,深度卷积神经网络对音乐流派数据的全局建模能力较弱的问题,提出了一种基于视觉变换(ViT)神经网络的音乐流派自动分类方法。该方法对待分类的音频进行预处理后,利用短时傅里叶变换(STFT)转化为尺寸统一的语谱图切片,实现音乐频域特征的转换。为了避免训练过拟合,通过增加白噪声对语谱图切片集进行数据增强。然后利用所生成的语谱切片集及其增强后的数据集对所构建的ViT神经网络进行训练,从而实现音乐流派风格的自动分类。仿真结果表明,所构建的ViT网络在音乐流派分类公共数据集GTZAN上的测试识别准确率达到91.01%,比基于AlexNet、AlexNet-enhanced和VGG16等传统卷积神经网络(CNN)的音乐流派分类方法提升了1.00~5.00个百分点。

关键词：视觉变换网络音乐流派特征转换语谱图深度学习数据增强

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一种含同轴电缆的线束内部串扰高效分析方法

电波科学学报 2021年第5期36卷 755-764页

作者：金奇盛卫星韩玉兵高成李炎新张仁李南京理工大学电子工程与光电技术学院南京210094

为了高效分析含同轴电缆的线束内部串扰,提出了一种新的简化电缆束模型的方法.该方法把简化电缆束的过程分为两步:首先,为了解决同轴电缆编织屏蔽层难以仿真的问题,利用内外传输线转移矩阵简化同轴电缆,将含同轴电缆的电缆束转化为全由... 详细信息

为了高效分析含同轴电缆的线束内部串扰,提出了一种新的简化电缆束模型的方法.该方法把简化电缆束的过程分为两步:首先,为了解决同轴电缆编织屏蔽层难以仿真的问题,利用内外传输线转移矩阵简化同轴电缆,将含同轴电缆的电缆束转化为全由单芯线组成的三维电缆束模型;然后,使用等效线束法将全单芯线的电缆束进一步简化,减少需要分析的单芯线数量.简化后的模型可用于任何三维电磁仿真软件中的电缆束内部串扰仿真分析,而无需考虑基于经典传输线理论的等效电路法的局限性.将提出的方法与等效电路法分别应用于电缆束内部串扰的分析,两者的仿真结果一致性良好,说明文中提出的方法是准确可行的,能够实现含同轴电缆的线束内部串扰的高效分析.

关键词：同轴电缆电缆束串扰多导体传输线等效线束法内外传输线转移矩阵

基于前后端分离架构的智慧农业物联网系统设计

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现代电子技术 2022年第14期45卷 63-68页

作者：李航董安明禹继国韩玉冰齐鲁工业大学(山东省科学院) 山东济南250353

针对传统物联网系统设计难以处理复杂业务逻辑且不易于功能扩展的问题,文中设计一种由远程数据服务平台、数据采集终端和窄带物联网(NB-IoT)无线数据传输模块组成的物联网系统。该系统在数据服务平台和应用层管理软件开发中采用前后端... 详细信息

针对传统物联网系统设计难以处理复杂业务逻辑且不易于功能扩展的问题,文中设计一种由远程数据服务平台、数据采集终端和窄带物联网(NB-IoT)无线数据传输模块组成的物联网系统。该系统在数据服务平台和应用层管理软件开发中采用前后端分离的设计思想和MVVM(Model-View-ViewModel)架构,采用***、Element技术开发前端Web页面,采用Django、SMTP、Nginx等技术开发后端数据服务器,以实现前后端数据的解耦,从而使系统具备处理复杂数据的潜力,便于系统的二次开发和新功能扩展。然后,基于树莓派构建嵌入式多元传感器采集节点,并利用低功耗NB-IoT模块实现数据的无线远程传输,以增加部署的灵活性,便于野外大范围布置传感器节点。最后,设计系统的实时数据监控、历史数据查询、数据可视化分析与处理、异常数据告警等应用功能,为农业生产过程监测提供便利。文中系统具备便捷的扩展接口,可作为各种农业物联网应用的基础开发平台,如构建农业土壤环境监测系统、病虫害智能诊断系统等,能够为精准农业和智慧农业信息系统构建提供载体。

关键词：物联网系统智慧农业前后端分离 NB-IoT 信息感知数据可视化异常告警

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Improvement of Cold Recycled Mixture Performance Based on Improved Density Test Method and RAP Characteristics

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 79-87页

作者： han Zhanchuang PANG Yafeng LIN Hongwei China First Highway Engineering Group Co. LtdBeijing 100024China The Key Laboratory of Road and Traffic Engineering Ministry of EducationTongji UniversityShanghai 201804China Guangzhou Baiyun International Airport Co. Ltd.Guangzhou 510470China

The available test methods for optimal moisture content of cold recycled mixture(CRM)as well as its bulk specific gravity,and theoretical maximum relative density were analyzed in this *** test improvements were suggested to improve test control of the CRM road performance based on the discovered ***,the properties of reclaimed asphalt pavement(RAP),including the content of old asphalt,penetration index,passing rate of 4.75 mm sieve,and gradation change rate after extraction,were *** effects of RAP characteristics on splitting tensile strength,water stability,the high-and low-temperature performance of emulsified asphalt CRM were *** results show that the optimum moisture content of CRM should be determined when the compaction work matches the specimen’s molding *** the analyzed methods of bulk specific gravity assessment,the dry-surface and CoreLok methods provide more robust and accurate results than the wax-sealing method,while the dry-surface method is the most *** modified theoretical maximum relative density test method is proposed,which can reduce the systematic error of the vacuum test *** following RAP-CRM trends can be *** lower the content of old asphalt and the smaller the change rate of gradation,the smaller the voids and the better the water stability of *** greater the penetration of old asphalt,the higher the fracture work and low-temperature splitting *** greater the penetration,the higher the passing rate of 4.75 mm sieve after extraction,and the worse the high-temperature performance of CRM.

关键词： RAP volume parameters high-temperature performance low-temperature performance water stability

Crystallization Modulation and Holistic Passivation Enables Efficient Two‑Terminal Perovskite/CuIn(Ga)Se_(2)Tandem Solar Cells

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Nano-Micro Letters 2025年第1期17卷 205-215页

作者： Cong Geng Kuanxiang Zhang Changhua Wang Chung Hsien Wu Jiwen Jiang Fei Long Liyuan han Qifeng han Yi‑Bing Cheng Yong Peng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070People’s Republic of China Triumph Photovoltaic Materials Co. Ltd.No.1001 Yannan AvenueHigh‑Tech Development DistrictBengbuAnhui 233000People’s Republic of China College of Materials Science and Engineering Guilin University of TechnologyGuilin 541004People’s Republic of China State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

Two-terminal(2-T)perovskite(PVK)/CuIn(Ga)Se_(2)(CIGS)tandem solar cells(TSCs)have been considered as an ideal tandem cell because of their best bandgap matching regarding to Shockley–Queisser(S–Q)***,the nature of the irregular rough morphology of commercial CIGS prevents people from improving tandem device *** this paper,D-homoserine lactone hydrochloride is proven to improve coverage of PVK materials on irregular rough CIGS surfaces and also passivate bulk defects by modulating the growth of PVK *** addition,the minority carriers near the PVK/C60 interface and the incompletely passivated trap states caused interface recombination.A surface reconstruction with 2-thiopheneethylammonium iodide and N,N-dimethylformamide assisted passivates the defect sites located at the surface and grain ***,LiF is used to create this field effect,repelling hole carriers away from the PVK and C60 interface and thus reducing *** a result,a 2-T PVK/CIGS tandem yielded a power conversion efficiency of 24.6%(0.16 cm^(2)),one of the highest results for 2-T PVK/CIGS TSCs to our *** validation underscores the potential of our methodology in achieving superior performance in PVK/CIGS tandem solar cells.

关键词： PVK/CIGS TSCs Irregular rough surfaces Modulating the growth PVK/C60 interface recombination

基于空时频三维稀疏字典的单通道CSA多参数联合估计

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空天预警研究学报 2023年第4期37卷 262-267,273页

作者：肖雷翁祖鑫韩玉兵南京理工大学电子工程与光电技术学院南京210094

针对单射频通道的压缩感知阵列(compressed sensing array,CSA),提出了一种基于稀疏重构的多参数联合估计方法.首先利用目标在空域和频域上的稀疏特性,以及线性调频(LFM)信号的自相关特性,构建了一种空-时-频三维稀疏字典用于回波信号... 详细信息

针对单射频通道的压缩感知阵列(compressed sensing array,CSA),提出了一种基于稀疏重构的多参数联合估计方法.首先利用目标在空域和频域上的稀疏特性,以及线性调频(LFM)信号的自相关特性,构建了一种空-时-频三维稀疏字典用于回波信号的稀疏表达;然后基于压缩感知理论对回波信号的投影向量进行稀疏重构,能够直接估计出目标的速度、角度以及距离信息.仿真结果验证了多目标场景下本文所提出的多参数联合估计算法的有效性.

关键词：空-时-频联合稀疏单射频通道压缩感知阵列参数估计

Unmasking Social Robots’Camouflage:A GNN-Random Forest Framework for Enhanced Detection

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Computers, Materials & Continua 2025年第1期82卷 467-483页

作者： Weijian Fan Chunhua Wang Xiao han Chichen Lin School of Data Science and Intelligent Media Communication University of ChinaBeijing100024China School of Computer and Cyber Sciences Communication University of ChinaBeijing100024China Institute of Communication Studies Communication University of ChinaBeijing100024China State Key Laboratory of Media Convergence and Communication Communication University of ChinaBeijing100024China

The proliferation of robot accounts on social media platforms has posed a significant negative impact,necessitating robust measures to counter network anomalies and safeguard content *** robot detection has emerged as a pivotal yet intricate task,aimed at mitigating the dissemination of misleading *** graphbased approaches have attained remarkable performance in this realm,they grapple with a fundamental limitation:the homogeneity assumption in graph convolution allows social robots to stealthily evade detection by mingling with genuine human *** unravel this challenge and thwart the camouflage tactics,this work proposed an innovative social robot detection framework based on enhanced HOmogeneity and Random Forest(HORFBot).At the core of HORFBot lies a homogeneous graph enhancement strategy,intricately woven with edge-removal techniques,tometiculously dissect the graph intomultiple revealing ***,leveraging the power of contrastive learning,the proposed methodology meticulously trains multiple graph convolutional networks,each honed to discern nuances within these tailored *** culminating stage involves the fusion of these feature-rich base classifiers,harmoniously aggregating their insights to produce a comprehensive detection *** experiments on three social robot detection datasets have shown that this method effectively improves the accuracy of social robot detection and outperforms comparative methods.

关键词： Social robot detection graph neural networks random forest homophily heterophily

Anomalous quality factor evolution of induced transparency in a virtualized coupled-oscillator system

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 148-155页

作者： Yunhan Yang han Jia Tuo Liu Yuzhen Yang Jun Yang Key Laboratory of Noise and Vibration Research Institute of Acoustics Chinese Academy of Sciences University of Chinese Academy of Sciences State Key Laboratory of Acoustics Institute of Acoustics Chinese Academy of Sciences

The phenomenon of induced transparency, characterized by a high quality(Q) factor, holds significant importance in the fields of high-precision sensing, energy storage and wave manipulation. Conventional transparency systems are often constrained by the limited experimentally accessible parameter space and the lack of independent control over intrinsic parameters, thereby hindering advanced research on high-Q effects. Here we propose a virtualized coupled-oscillator system that enables reconfigurable induced transparency in the reflection spectrum. By virtually incorporating a pair of coupled oscillators into an individual acoustic meta-atom, we achieve the manipulation of induced transparency in a decoupled, wide-ranging, and elaborate manner. Exploiting the diverse evolutions across the intrinsic parameter space, we show experimentally a counter-intuitive increase in the Q-factor of the transparency window, which is attributed to the enhanced dissipation of the bright ***, a constant group delay at the center frequency is observed accompanying this evolution. Our work demonstrates an intriguing platform as well as a novel strategy to engineer high-Q induced transparency phenomenon, and paves the way towards applications in programmable acoustic sensors, filters and slow-wave devices.

关键词： induced transparency acoustic meta-atom high quality-factor scattering programmable intrinsic parameter