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International Conference on Artificial Intelligence and Autonomous Transportation, AIAT 2024

作者： Bai, Jie Qin, Yong Xu, Tiantao Cao, Zhiwei Jing, Tao Guo, Baoqing State Key Laboratory of Advanced Rail Autonomous Operation Beijing Jiaotong University Beijing100044 China Institute of Science and Technology China Railway Jinan Group Corporation Limited Jinan250032 China School of Electronic and Information Engineering Beijing Jiaotong University Beijing100044 China

ISBN: (纸本)9789819639687

Railway lines are long, and the full coverage of line monitoring sensors faces the problem of huge cost. In this paper, the research on the optimization method of railway line monitoring sensor layout is carried out to address this problem. Firstly, based on the perception accuracy of the monitoring sensor algorithm to the abnormal event, the calculation method of monitoring sensor layout distance is proposed. Then, based on the method, monitoring sensor layout methods for the conventional area, the key area and the interface area are proposed. Finally, a case study is carried out on the design line. The calculation results show that compared with the existing standards, the method proposed in this paper can effectively reduce the cost of monitoring sensor layout while maintaining high perception accuracy. This method is more economical and reasonable. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： Railroads

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Portable, High-Frequency, and High-Voltage Control Circuits for Untethered Miniature Robots Driven by Dielectric Elastomer Actuators

arXiv

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arXiv 2025年

作者： Shao, Qi Liu, Xin-Jun Zhao, Huichan Department of Mechanical Engineering State Key Laboratory of Tribology in Advanced Equipment Beijing Key Laboratory of Transformative High-end Manufacturing Equipment and Technology Tsinghua University Beijing100084 China

In this work, we propose a high-voltage, high-frequency control circuit for the untethered applications of dielectric elastomer actuators (DEAs). The circuit board leverages low-voltage resistive components connected in series to control voltages of up to 1.8 kV within a compact size, suitable for frequencies ranging from 0 to 1 kHz. A single-channel control board weighs only 2.5 g. We tested the performance of the control circuit under different load conditions and power supplies. Based on this control circuit, along with a commercial miniature high-voltage power converter, we construct an untethered crawling robot driven by a cylindrical DEA. The 42-g untethered robots successfully obtained crawling locomotion on a bench and within a pipeline at a driving frequency of 15 Hz, while simultaneously transmitting real-time video data via an onboard camera and antenna. Our work provides a practical way to use low-voltage control electronics to achieve the untethered driving of DEAs, and therefore portable and wearable devices. Copyright © 2025, The Authors. All rights reserved.

关键词： Wearable antennas

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Photocatalytic water splitting versus H_(2) generation coupled with organic synthesis:A large critical review

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Chinese Journal of Catalysis 2025年第3期70卷 44-114页

作者： Oleksandr Savateev Jingru Zhuang Sijie Wan Chunshan Song Shaowen Cao Junwang Tang Department of Chemistry The Chinese University of Hong KongShatinNew TerritoriesHong KongChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina Industrial Catalysis Center Department of Chemical EngineeringTsinghua UniversityBeijing 100084China

Photocatalytic water splitting using natural solar light is considered as a sustainable approach to generate H_(2) and O_(2).While H_(2) has high market value,the by-product of water splitting,oxygen,is less *** make H_(2) produced by means of photocatalysis more economically competitive to that generated from methane,its generation is studied together with synthesis of organic compounds that have higher market *** review summarizes and analyzes critically dehydrogenation reactions that were developed since *** dehydrogenation reactions are classified and the results are collected in the online *** of homogeneous and heterogenous photocatalysts in dehydrogenation reactions,such as yield rates of organic products on analytical and preparative scales,and quantum efficiencies are *** limitations of the existing methods and photocatalytic systems are identified and directions for the future developments are outlined.

关键词： Acceptorless dehydrogenation Photocatalysis Photoredox catalysis Hydrogen Organic synthesis

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Multifunctional superhydrophobic film with comprehensive icing monitoring, anti-icing, and photothermal/electrothermal deicing properties

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Progress in Organic Coatings 2025年 206卷

作者： Ji, Haozhong Yang, Chao Su, Haoxi Qi, Zhengpan Wang, Yao Cheng, E. Hu, Ning School of Mechanical Engineering Hebei University of Technology Tianjin300401 China Key Laboratory of Advanced Intelligent Protective Equipment Technology Ministry of Education Tianjin300401 China State Key Laboratory of Reliability and Intelligence Electrical Equipment Hebei University of Technology Tianjin300401 China

Superhydrophobic photothermal/electrothermal surfaces have garnered considerable attention on account of the synergistic effect of the superhydrophobic anti-icing and photothermal/electrothermal deicing, which can effectively address the issue of surface icing. However, it lacks the ability to precisely monitor the icing process, a critical component for improving their deicing efficiency. Therefore, a multifunctional superhydrophobic film with comprehensive icing monitoring, anti-icing, and photothermal/electrothermal deicing properties was prepared using the laser ablation method, which consisted of an interdigital patterned laser-ablated graphene (LAG) planar capacitance sensor and a laser-ablated polytetrafluoroethylene (PTFE) superhydrophobic surface. As a result, it was able to effectively monitor the process of ice growth and detect the thickness of ice by utilizing the differences in dielectric properties of water, ice, and air. In addition, the laser-ablated PTFE superhydrophobic surface processed a contact angle of 159.5° and a sliding angle of 3.5°, which prevented the ice formation for 4.9 min at −20 °C. Meanwhile, by harnessing the photothermal and electrothermal effects of the LAG conductive network, the surface temperature reached 108.4 °C and 43.2 °C with a light irradiance of 2 W/cm2 and an applied electric power density of 0.135 W/cm2, respectively, thereby allowing effective deicing. Consequently, the multifunctional superhydrophobic film, with its comprehensive icing monitoring, anti-icing, and photothermal/electrothermal deicing properties, possesses significant potential for the prevention and removal of ice. © 2025 Elsevier B.V.

关键词： Laser ablation

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Inhibition of KDM6B prevents osteoarthritis by blocking growth plate-like H3K27me3 loss in bivalent genes

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Science China Life Sciences 2025年第5期68卷 1423-1436页

作者： Hao Du Yao Zhang Xi Yu Xuanhe You Diwei Wu Ze Du Yongrui Cai Zhenyu Luo Hanpeng Lu Zhixin Liao Bi-Sen Ding Ya Zhao Yan Wang Ke Xiao Fan Yang Fangji Gan Ning Ning Jiancheng Zeng Peiliang Shi Zongke Zhou Shishu Huang Department of Orthopedic Surgery and Orthopedic Research Institute West China HospitalSichuan University Rehabilitation Medicine Center West China HospitalSichuan University Key Laboratory of Birth Defects and Related Diseases of Women and Children of MOE State Key Laboratory of BiotherapyWest China Second University HospitalSichuan University Institute of Translational Medicine Medical CollegeYangzhou University Jiangsu Key Laboratory of Experimental & Translational Non-coding RNA Research College of Animal Science and Technology Sichuan Agricultural University Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province Sichuan Agricultural University Department of Lower Limb Surgery of Sichuan Province Orthopedic Hospital Central Laboratory of Sichuan Province Orthopedic Hospital Brain Cognition and Brain Disease Institute (BCBDI) Shenzhen Institute of Advanced TechnologyChinese Academy of Sciences (CAS)Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions School of Mechanical Engineering Sichuan University Gem Pharmatech (Chengdu) Co. Ltd.

Osteoarthritis(OA) is the most prevalent joint disorder occurring with articular cartilage degradation. It includes a switch from an articular to a growth plate chondrocyte phenotype. Here, we investigated the histone modification profiles and found significant H3K27me3 loss in OA, which led to disease-associated gene expression. Surprisingly, these genes were occupied by both H3K27me3 and H3K4me3 in normal chondrocytes, showing a poised bivalent state. Furthermore, we observed the derepression of similar bivalent genes in growth plate chondrocytes. Finally, a KDM6B inhibitor GSK-J4 prevented the H3K27me3 loss and cartilage damage in the rat OA model. Our results reveal an inherited bivalent epigenetic signature on developmental genes that makes articular chondrocytes prone to hypertrophy and contributes to a promising epigenetic therapy for OA.

关键词： osteoarthritis histone modifications H3K27me3 bivalency growth plate

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Effects of Thermal Aging on Microstructure and Mechanical Properties of Interface of Hot Isostatic Pressing Densified Low Alloy Steel with Inconel 690 Cladding

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Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and engineering 2025年第4期54卷 879-885页

作者： Yu, Lei Cao, Rui Ma, Jinyuan Yan, Yingjie Dong, Hao Wang, Caiqin State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology Lanzhou730050 China School of Materials Science and Engineering Lanzhou University of Technology Lanzhou730050 China Advanced Technology & Materials Co. Ltd Beijing100081 China Hebei Hot Isostatic Pressing Technology Innovation Center Zhuozhou072750 China

The microstructure, micro-hardness, and tensile properties of interface between hot isostatic pressing densified low alloy steel and Inconel 690 cladding were investigated during the aging process at 600 ℃. The results show that the interface region can be divided into four zones from base metal to deposited metal: carbon-depleted zone (CDZ), partial melting zone (PMZ), planar growth zone (PGZ), and brownish feature zone (BFZ). Dimensions of these zones do not significantly change during aging. However, type I carbides noticeably increase in size in the PMZ, and precipitates clearly occur in the PGZ. The main reason for their growth and occurrence is continuous carbon migration. The highest micro-hardness appears in the PGZ and BFZ regions, which is related to carbon accumulation and precipitates in these regions. Tensile failure occurs on the base metal side due to the high strength mismatch between these two materials. The CDZ, composed of only ferrite, has lower strength and fractures at the boundary between CDZ and base metal. The ultimate tensile strength decreases by only 50 MPa after aging for 1500 h, and the interface region maintains high strength without significant deformation. Copyright © 2025, Northwest Institute for Nonferrous Metal Research. Published by Science Press. All rights reserved.

关键词： Tensile strength

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Multispectral radiation thermometry approach based on feasible region constraints-divide and conquer optimization

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Optics Express 2025年第10期33卷 20736-20753页

作者： Hairui Huang Wei Zhang Peifeng Yu Jiawen Xu Xin Liu Shan Gao Chao Wang Zezhan Zhang Yi Niu Jing Jiang Clean Energy Materials and Engineering Center School of Electronic Science and Engineering State Key Laboratory of Electronic Thin Film and Integrated Devices University of Electronic Science and Technology of China 611731 Chengdu China The State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision Instrument Tsinghua University Beijing 100084 China Key Laboratory of Advanced Marine Communication and Information Technology Ministry of Industry and Information Technology School of Information and Communication Engineering Harbin Engineering University 150001 Harbin China zhangzz@*** niuyi@*** jiangj@***

Multispectral radiation thermometry is a widely used non-contact temperature measurement method, particularly in extreme environments. However, accurately retrieving the true temperature remains challenging due to the unknown emissivity of the object. This paper proposes a collaborative optimization approach (feasible region constraints-divide and conquer optimization), which combines a feasible domain constraints method (PCR-PSO) with a divide and conquer optimization algorithm (multi-BFGS). Simulation results show that the proposed approach reduces the temperature inversion error from 0.59% to 0.19% compared to the traditional BFGS algorithm. Experimental results obtained with stainless steel samples indicate an average error of less than 0.2% and an average processing time of 0.2 seconds, highlighting the potential for real-time temperature measurement in engineering applications.

关键词： Emissivity Machine learning Neural networks Numerical simulation Silicon carbide Transmittance

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Effect of microstructure on the hydrogen cracking behavior of bimetallic metallurgical clad pipes: The role of precipitated phases and inclusions

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International Journal of Hydrogen Energy 2025年 137卷 13-25页

作者： Yao, Guanghu Liu, Ming Ye, Wenhui Xu, Lining Li, Jinxu Qiao, Lijie Yan, Yu State Key Laboratory of Nuclear Power Safety Technology and Equipment University of Science and Technology Beijing Beijing100083 China Beijing Advanced Innovation Center for Materials Genome Engineering Corrosion and Protection Center Institute for Advanced Materials and Technology University of Science and Technology Beijing Beijing100083 China

Bimetallic metallurgical clad pipes are designed to resist corrosion cracking due to hydrogen sulfide. However, they are still susceptible to hydrogen-induced cracking, limiting their safe use in practice. This study investigated the mechanical properties and hydrogen distribution characteristics of alloy 825/L360 bimetallic metallurgical clad pipes through fracture tests and hydrogen distribution experiment. SKPFM and hydrogen microprinting were innovatively combined to characterize local hydrogen distribution in welded materials. This overcame single-scale limits, enabling macro-nano correlation of hydrogen distribution. The fracture behavior of alloy 825/L360 bimetallic clad pipes in a hydrogen environment was explored. key results: after 133-h hydrogen precharge, specimen elongation loss hit 53 %. Hydrogen cracks started at carbide-containing grain boundaries, with TiN aiding expansion. SKPFM showed M23C6-substrate interfaces had irreversible hydrogen enrichment (6.54 mV–92.84 mV), while TiN inclusions had weak reversible trapping (10 mV fluctuation). © 2025 Hydrogen Energy Publications LLC

关键词： Pipeline corrosion

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Solid-state stepwise temperature-programmable synthesis of bioinspired Fe-N-C oxygen reduction electrocatalyst featuring Fe-N_(5)configuration

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Nano Research 2025年第3期18卷 654-665页

作者： Wei Sang Somboon Chaemchuen Longyang Zhang Zechen Wang Xingchuan Li Cocoro Andrew Nagasaka Mo Xiong Naoki Ogiwara Cheng Chen Zhao Wang Jian Zhang Francis Verpoort Shichun Mu Zongkui Kou Tingting Wang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Department of Basic Science School of Arts and SciencesThe University of TokyoKomabaMeguro-kuTokyo 153-8902Japan MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter School of PhysicsXi’an Jiao tong UniversityXi’an 710049China Sanya Science and Education Innovation Park of Wuhan University of Technology Sanya 572000China Department of Chemical Engineering Faculty of EngineeringMahidol UniversityNakhon Pathom 73170Thailand School of Mathematical&Physical Sciences Wuhan Textile UniversityWuhan 430200China Joint Institute of Chemical Research(FFMiEN) Peoples Friendship University of Russia(RUDN University)6 Miklukho-Maklaya Str.117198 MoscowRussia National Research Tomsk Polytechnic University Lenin Avenue 30634050 TomskRussia Hubei Key Laboratory of Ferro &Piezo-electric Materials and DevicesFaculty of Physics and Electronic SciencesHubei UniversityWuhan 430062China School of Chemistry and Chemical Engineering Hainan UniversityHaikou 57022China

The bioinspired Fe-N-C features an asymmetric Fe-N_(5)configuration to produce active metal-oxygen intermediates by introducing axial N ligand into a symmetric Fe-N_(4) structure,enabling highly active oxygen reduction reaction(ORR).However,the artificial creation of active Fe-N_(5)configuration with a direct,facile and green method has been rarely developed yet,as current techniques involve complex processes and costly ***,we advance a novel solid-state stepwise temperature-programmable(SST)route to directly produce bioinspired Fe-N_(5)-*** then demonstrate that such a Fe-N_(5)-C exhibits a quite higher half-wave potential(0.92 V)with 22-fold faster ORR kinetics(15.6 mA·cm^(−2)@0.85 V)over that of the commercial Pt/C ***,we perform density functional theory(DFT)to find that the Fe is discharged with an extra 0.1 e^(−)through the axially coordinate N ligand,which significantly enhances the ability to activate O_(2) and enables an easier desorption of the crucial intermediate ^(*)OH on the Fe-N_(5)configuration over the conventional Fe-N_(4) structure.

关键词： single atom catalysts Fe-N_(5)coordination solvent-free synthesis oxygen reduction reaction(ORR) metal-air battery

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On the Cycle Structure of Some Nonlinear Feedback Shift Registers

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Chinese Journal of Electronics 2025年第4期23卷 801-804页

作者： Zhongxiao Wang Hong Xu Wenfeng Qi State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou Information Science and Technology Institute Zhengzhou China Department of Computer Science and Engineering Shanghai Jiao Tong University Shanghai China

In this paper, we partly determine the cycle structure of two types of Nonlinear feedback shift registers (NFSRs). Based on these results, the cycle structure of a class of NFSRs with symmetric feedback functions can be completely characterized. Furthermore, an alternative proof of Kjeldsen's results is presented. Compared with the original proof based on abstract algebra theory, ours is straightforward and easy to understand.

关键词： Abstract algebra Shift registers Cryptography

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