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Real-time traffic enhancement scheduling for train communication networks based on TSN

Journal of Traffic and Transportation Engineering(English Edition) 2025年第1期12卷 34-51页

作者： Deqiang He Zeqian Chen Daliang Sun Zhenzhen Jin Yanjun Chen Rui Ma Chen Liang Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education Guangxi Key Laboratory of Manufacturing System & Advanced Manufacturing TechnologySchool of Mechanical EngineeringGuangxi University

With the increasing data volume of train on-board system, real-time performance has become the most critical factor to ensure the safety of train operation. Considering that standard Ethernet cannot meet the real-time requirement of existing train communication network(TCN), the time-sensitive network(TSN) technology for TCN is introduced. To solve the time-delay problem, an adaptive switch queue selection mechanism for traffic scheduling is proposed. Firstly, the topology model of TCN based on TSN and the traffic model are described. Then, the K shortest path routing algorithm based on load balancing provides the optimal routing for the scheduling process. Finally, the adaptive switch queue selection mechanism is introduced to solve the aggregation flow conflict problem effectively, queue resources are properly allocated, and the gate control list(GCL) of each frame in the queue is obtained. Experimental results show that compared with the traditional constraint model, the schedulability of the model with an adaptive switch queue selection mechanism increases by 33.0%, and the maximum end-to-end delay and network jitter decrease by 19.1% and 18.6% on average respectively. It can provide theoretical support and application reference for the real-time performance optimization of TCN based on TSN.

关键词： Train communication network Time-sensitive network Adaptive switch queue selection mechanism Gate control list Real-time

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Edge-Cloud Cooperation-Driven Intelligent Sustainability Evaluation Strategy Based on IoT and CPS for Energy-Intensive manufacturing Industries

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IEEE Internet of Things Journal 2025年第9期12卷 12287-12297页

作者： Ma, Shuaiyin Huang, Yuming Chen, Yanping Xiao, Qinge Xu, Jun Leng, Jiewu Xi’an University of Posts and Telecommunications Shaanxi Key Laboratory of Network Data Analysis and Intelligent Processing Xi’an Key Laboratory of Big Data and Intelligent Computing School of Computer Science and Technology Xi’an710121 China Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Shenzhen518055 China Xidian University Advanced Manufacturing Technology Innovation Center Guangzhou Institute of Technology Guangzhou510555 China Guangdong University of Technology Guangdong Provincial Key Laboratory of Computer Integrated Manufacturing System State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment Guangzhou510006 China

The advancement of the Industry 5.0 in information technology has led to increased interest in integrating edge-cloud cooperation with Internet of Things (IoT) and cyber-physical system (CPS) designs. This integration effectively reduces service delays and provides real-time analysis feedback to physical spaces, attracting attention from both academia and industry. These advanced technologies enhance production system intelligence, their alignment with circular economy principles for promoting sustainability has been overlooked. To address this gap, this article proposes an intelligent sustainability evaluation strategy driven by edge-cloud cooperation, IoT, and CPS. The proposed approach aims to enhance production sustainability and intelligence through circular economy perspectives. It introduces improved gray relation analysis and deep clustering network techniques to extract meaningful insights from diverse indicators within the evaluation system. By analyzing relationships between different equipment and workshops, it provides an analytical method that enhances production efficiency while reducing energy consumption and resource waste. To further validate the proposed method, an illustrative example using a partner company’s production data demonstrates its accuracy. © 2014 IEEE.

关键词： Circular economy

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Abnormal dielectric behavior of glaserite-type Ba_(3−x)Sr_(x)MgSi_(2)O_(8)solid solution

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Journal of advanced Ceramics 2025年第2期14卷 77-86页

作者： Jiaqing Yang Peng Lei Xiaoqiang Song Changzhi Yin Meng Zhang Weicheng Lei Yiyang Cai Mingfei Cheng Yaodong Liu Zihang Chen Yaqing Hu Wenzhong Lu Wen Lei School of Optical and Electronic Information Key Lab of Functional Materials for Electronic Information(B)of MOEHuazhong University of Science and TechnologyWuhan 430074China Wenzhou Key Laboratory of Microwave Communication Materials and Devices Wenzhou Advanced Manufacturing Institute of HUSTWenzhou 325035China

The temperature coefficient of the resonant frequency(τ_(f))of low-permittivity(ε_(r))microwave dielectric ceramics is required to be near 0 ppm/℃for practical ***,owing to the polarization mechanism,τ_(f)of low-ε_(r)microwave dielectric ceramics is generally ***,a novel microwave dielectric ceramic,Ba_(3−x)Sr_(x)MgSi_(2)O_(8),with an abnormal positiveτ_(f)at the applied temperature is *** this study,Sr^(2+)with a relatively small ionic radius was introduced to replace Ba^(2+),and a single-phase solid solution was formed(x>0.5).Ba_(3−x)Sr_(x)MgSi_(2)O_(8)ceramics were discussed in glaserite-type topology with space groups of P_(3)^(-)for x≤0.5,relatively high symmetry P_(3)^(-)m1 for 0.5

关键词： microwave dielectric ceramics abnormal dielectric behavior ion size mismatch [SiO4]tetrahedra tilting phase transition density functional theory(DFT)

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Chirp-free hundred-picosecond pulse fiber laser based on carbon nanotubes mode-locker

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Optics Express 2025年第7期33卷 14850-14857页

作者： Li, Weixi Jiang, Kailin Dai, Lilong Huang, Qianqian Zou, Meng Luo, Siyu Chen, Siyu Song, Yingxiong Liu, Yunqi Yan, Zhijun Mou, Chengbo Key Laboratory of Specialty Fiber Optics and Optical Access Networks Shanghai Institute for Advanced Communication and Data Science Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication Shanghai University Shanghai200444 China School of Optical and Electronic Information National Engineering Laboratory for Next Generation Internet Access System Huazhong University of Science and Technology Wuhan430074 China

We demonstrate a narrow bandwidth passively erbium-doped mode-locked fiber laser based on single-wall carbon nanotubes (SWCNTs). The center wavelength is 1546.61 nm. The strong filtering effect and low saturable absorber (SA) modulation depth provide advantages for a long pulse duration of 323 ps. An overall spectral bandwidth of 1.3 GHz (0.01 nm) is measured by the optical heterodyne method, representing the narrowest spectral width based on SWCNT under a single filter structure. The obtained spectral width is very close to the transform-limited bandwidth of 8 pm, indicating that the pulse is chirp-free. Meanwhile, the generation of beat signals reveals the strong coherence between pulses. The repetition frequency of the laser is 7.8 MHz, and the number of longitudinal mode locks is only 166, which is the minimum number of longitudinal mode-locking in passively mode-locked laser based on material SA. At the same time, numerical simulations further support our experimental results and reveal the pulse evolution, providing evidence that SA and filter are the key factors in the generation of chirp-free long pulse. © 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

关键词： Saturable absorbers

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Performance assessment of octagonal layout based integrated photonic reservoir computing for optical channel equalization

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Optics Express 2025年第7期33卷 15814-15826页

作者： Zuo, Xiaoyan Pei, Li Bai, Bing Bai, Bowen Hu, Zhouyi Wang, Jianshuai Qu, Qi Dong, Fei Institute of Lightwave Technology Beijing Jiaotong University Ministry of Education Key Laboratory of All-Optical Networks and Modern Communication Networks Beijing100044 China Technology Co. Ltd. China State Key Laboratory of Advanced Optical Communications System and Networks School of Electronics Peking University Beijing100871 China Beijing Aerospace Institute for Metrology and Measurement Technology Beijing100076 China

Compared to electronic equalizers, the equalizers based on integrated photonic reservoir computing exhibit the advantages of large bandwidth, short latency, and low power consumption. The existing rectangular reservoir layout employs internal nodes as input and output nodes, leading to inadequate signal exchange and extra noise due to waveguide crossing. We proposed an optical channel equalizer based on an octagonal reservoir layout and verified its equalization ability. The system-level simulation of the proposed layout is conducted to investigate the impact of layout shape, node quantity, input and output port number, and weight algorithm on channel equalization performance in a 25Gbaud 4-level pulse amplitude modulation optical communication system. Results indicate that, within a transmission distance of 5-30 km, the bit error rate (BER) of the equalized signal in the proposed octagonal layout is lower than that of a rectangular layout with the same number of nodes. Specifically, at 5 km, the octagonal layout’s BER is 5 and 10 orders of magnitude lower than the rectangular layout and the feedforward equalizer, respectively. Meanwhile, the best readout algorithm, K-nearest neighbor regression, achieves an equalized BER of 7.012 × 10−14 © 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

关键词： Pulse amplitude modulation

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Generation of 200 fs optical vortex pulses with 12MW peak power from a Yb-doped fiber amplifier

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Optics Letters 2025年第8期50卷 2695-2698页

作者： Luo, Weijia Lin, Di Wang, Shan Yu, Lin Wei, Cunjiang Zhuang, Ziheng Guo, Xiaoyang Liu, Xing Fu, Songnian Qin, Yuwen Institute of Advanced Photonics Technology School of Information Engineering Guangdong University of Technology Guangzhou510006 China Key Laboratory of Photonic Technology for Integrated Sensing and Communication Ministry of Education of China Guangdong University of Technology Guangzhou510006 China Guangdong Provincial Key Laboratory of Information Photonics Technology Guangdong University of Technology Guangzhou510006 China Shenzhen Key Laboratory of Ultra-Intense Laser and Advanced Material Technology Center for Intense Laser Application Technology College of Engineering Physics Shenzhen Technology University Shenzhen518118 China Key Laboratory of Advanced Optical Precision Manufacturing Technology of Guangdong Higher Education Institutes Sino-German College of Intelligent Manufacturing College of Engineering Physics Shenzhen Technology University Shenzhen518118 China

We report the generation of high peak power linearly polarized femtosecond optical vortex pulses based on parabolic pulse amplification within a large-mode-area few-mode Ybdoped fiber (YDF) amplifier system. A dispersion-managed passively mode-locked Yb-doped fiber oscillator with a Gaussian-shaped spectrum serves as the seed source, which evolves into parabolic shape in the subsequent preamplifiers. Aq-plate-based mode converter, positioned before the power amplifier, is employed to convert the Gaussian-shaped beam into optical vortex beams with a topological charge of l=±1. The resulting optical vortex beams are efficiently amplified to an average output power of ∼16.8W at a repetition rate of 3.7 MHz, corresponding to a pulse energy of 4.5 μJ. The chirped output pulses are externally compressed to ∼200 fs, achieving a peak power of ∼12.7MW. To the best of our knowledge, this represents the highest peak power achieved to date for optical vortex pulses generated from a conventional step-index fiber. © 2025 Optica Publishing Group.

关键词： Pulse repetition rate

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Defects response to precoated adhesive in Al/steel friction stir welded joint

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Journal of manufacturing Processes 2025年 141卷 1109-1118页

作者： Huang, Weiben Ding, Zhijie Li, Peng Zhao, Peng Zhou, Dianwu Huang, Yongxian Meng, Xiangchen Li, Yongbing Ma, Yunwu Dong, Honggang School of Materials Science and Engineering Dalian University of Technology Dalian116024 China State Key Laboratory of Advanced Design and Manufacturing Technology for Vehicle Hunan University Changsha410082 China State Key Laboratory of Precision Welding & Joining of Materials and Structures Harbin Institute of Technology Harbin150001 China State Key Laboratory of Mechanical System and Vibration Shanghai Jiao Tong University Shanghai200240 China

Friction stir welding (FSW) has been applied for welding dissimilar materials in advanced manufacturing industries such as shipbuilding, automotive and aerospace. For the broad popularization of adhesive in FSW, the innovative coupling method of friction stir welding-adhesive bonding (FSW-AB) technology was designed to join 5A06 aluminum alloy to 304 stainless steel. The joints were fabricated using a single-component structural adhesive applied manually in the pre-lap zone. The joints were then cured by the heat generated from FSW. Macrostructure, defect generation and tensile shear performances of the joints obtained using three different rotation speeds and different adhesive thickness were studied. The adhesive prevented direct plate contact, but the FSW-AB joint showed more flash. Adhesive expansion occurred on the advancing side due to structural asymmetry and uneven heat dissipation. Compared to conventional FSW, the joints produced by FSW-AB exhibited significantly reduced hook defects in the pin-affected zone, a smoother distribution of hardness across the weld cross-section, and notably elevated hardness on the retreating side of the base metal outside the shoulder. It is attributed to the difference in the degree of crystallization between the two caused by the difference in heat dissipation rate. The ultimate tensile shear load of the FSW-AB joint reached 93.3 % of the conventional FSW joint at 1200 rpm stirring speed and 0.25 mm adhesive thickness. Furthermore, the fracture modes of FSW-AB joints were mainly normal fracture and shear fracture. © 2025 The Society of manufacturing Engineers

关键词： Vickers hardness

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Strategies for Guiding Directional Topological Waveguides with Symmetric Regularity

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Journal of Lightwave technology 2025年第10期43卷 4913-4918页

作者： Yu, Wenjia Liu, Shiyu Sun, Hang Wang, Jicheng Yang, Yuting Jiangnan University School of Science Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology Wuxi214122 China Soochow University Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province Suzhou215006 China China University of Mining and Technology School of Materials Science and Physics Xuzhou221116 China Southeast University China and the State Key Laboratory of Millimeter Waves Nanjing210096 China Soochow University The Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province Suzhou215006 China

The advantageous characteristics of topological photonic crystals facilitate the directional manipulation of waveguides. In this study, we propose a topological photonic crystal that breaks C4 symmetry through rotation, resulting in a symmetric gradient of topological edge state frequencies in both vertical and horizontal directions, thereby enabling precise control over the direction of the edge states. We developed two types of three-channel composite devices informed by our analysis of the transmission characteristics of photonic crystal arrays. These application were experimentally demonstrated in this study. We also construct an eight-path optical device in which topological edge states appear in succession with decreasing wavelengths. These regular transmission waveguides offer new opportunities for device design and the realization of multifunctional effects. © 1983-2012 IEEE.

关键词： Topology

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Micro-convex structure-assisted laser-induced backside dry etching for high-efficiency fabrication of micro-groove array on fused silica toward manipulation of wetting characteristics

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Journal of manufacturing Processes 2025年 145卷 236-251页

作者： Huang, Hu An, Hong Qian, Yongfeng Zhang, Zhiyu Jiang, Minqiang Yan, Jiwang Key Laboratory of CNC Equipment Reliability Ministry of Education School of Mechanical and Aerospace Engineering Electron Microscopy Center Jilin University Changchun130022 China Key Laboratory of Optical System Advanced Manufacturing Technology Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences Changchun130033 China State Key Laboratory of Nonlinear Mechanics Institute of Mechanics Chinese Academy of Sciences Beijing100190 China School of Engineering Science University of Chinese Academy of Sciences Beijing101408 China Department of Mechanical Engineering Faculty of Science and Technology Keio University Yokohama223-8522 Japan

Fused silica has garnered significant attention in various industrial applications. The creation of surface micro/nanostructures on fused silica can impart specialized functional properties, such as extreme wettability, ultra-high transmittance, and excellent antimicrobial characteristics. Nonetheless, existing technologies for achieving surface micro/nanopatterning of fused silica, including wire electrical discharge machining, chemical etching, and electrochemical deposition, generally suffer from long processing cycles and high energy consumption, which are inconsistent with the development concept of the low-carbon economy. In this study, a novel approach termed micro-convex structure-assisted laser-induced backside dry etching (MCSALIBDE) is proposed for high-efficiency fabrication of micro-groove array on fused silica surfaces. The synergistic effect of enhanced heat conduction and plasma explosion in a confined space facilitates material ablation. The impact of processing parameters including scanning pitch and peak laser power intensity on the morphological and topographical features of the MCSALIBDE-processed fused silica surfaces is studied. Notably, the micro-groove structures with a depth-to-width ratio of 1.19 is fabricated. Furthermore, the wetting behaviors of the MCSALIBDE-processed fused silica surfaces before and after annealing treatment are studied. Experimental findings reveal that the MCSALIBDE-processed fused silica surfaces exhibit enhanced hydrophilicity compared to the untreated one. After annealing treatment, a transformation from hydrophilicity to superhydrophobicity is observed. The superhydrophobic surfaces produced under different laser parameters exhibit distinct adhesion and droplet bouncing behaviors. This work offers an in-depth understanding of the high-efficiency fabrication of micro/nanostructures on fused silica surfaces and as well the modulation of their wetting characteristics, heralding innovations in surface engineering fo

关键词： Wetting

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Advancements in graphene-based composites: A review of the emerging applications in healthcare

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Smart Materials in Medicine 2025年第1期6卷 120-138页

作者： Batool, Farwa Muhammad, Saz Muazzam, Rabia Waqas, Muhammad Ullah, Zia Roy, Shubham Zhang, Yinghe Wang, Ke Guo, Bing Department of Chemistry Lahore Garrison University DHA Phase VI Lahore Pakistan School of System Design and Intelligent Manufacturing Southern University of Science and Technology Shenzhen518055 China School of Science Shenzhen Key Laboratory of Flexible Printed Electronics Technology Shenzhen Key Laboratory of Advanced Functional Carbon Materials Research and Comprehensive Application Harbin Institute of Technology Shenzhen518055 China Government Queen Mary Graduate College Lahore Pakistan

Graphene and related materials are emerging revolutionary materials due to fascinating stimuli-responsive physiochemical properties having widespread applications in developing advanced nano-systems for detection, diagnostics, and therapeutics in biomedical fields. Various materials like metal nanoparticles, polymers, dyes, drugs, and proteins could be combined yielding graphene-based composite materials (GBCMs) to synergistically fulfill different biomedical requirements. The 2D conjugated structure, easy surface functionalization via covalent or van der Waal interactions, and combination with different components for versatile functionalities altogether contribute to the development of GBCM for healthcare applications. This review specifically focuses on GBCMs and discusses specific material properties relevant to their material applications in healthcare. Furthermore, the synthesis, toxicity, and biocompatibility of these GBCMs, and their interactions with biological materials are thoroughly discussed. Importantly, the recent cutting-edge applications in the field of healthcare, including its role in the development of antibacterial, anti-viral, and photothermal therapies, wound healing, drug delivery, neurodegenerative disease therapy, and biosensing based on GBCMs are well-updated. Additionally, the applications of GBCMs in point-of-care devices, wearable electronics, and tissue engineering are well summarized. We hope this review opens up more possibilities to design more innovative healthcare materials derived from graphene. © 2025 The Authors

关键词： Biocompatibility

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