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Translation of steel surface defect detection algorithm with fusion of multiple attention detection heads

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Optoelectronics Letters 2025年

作者： SHI Tao CUI jie LI song Tianjin University of Technology， School of Electrical Engineering and Automation North China University of Science and Technology， School of Electrical Engineering

This paper proposes an end-to-end defect detection algorithm model called YOLOv5-CJ to address the issues of missed detections and low accuracy in visual steel surface defect detection. By incorporating the C3＿MSBlock module， which is designed based on Res2Net and contains multi-scale information， into the backbone network， the model can represent multi-scale features at a finer granularity level and increase the network's receptive field. In the detection head， the DyHead attention mechanism is introduced， which integrates scale awareness， spatial awareness， and task awareness， to help the model better cope with complex industrial scenes with large background interference， significant defect scale variations， and easily confused defect categories. Soft NMS is employed to enhance the recognition capability in overlapping regions. Experimental results demonstrate that the proposed YOLOv5-CJ model outperforms YOLOv5s，achieving an average precision (mAP0.5 and mAP0.5:0.95) improvement of 1.9% and 7.2% on the NEU-DET dataset， and 5.3% and 4.3% on the GC10-DET dataset， respectively， validating the feasibility and effectiveness of the proposed model.

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Printing perovskite and graphene parallel structure-based optical-mechanical sensors for human-machine interaction

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Science China Technological Sciences 2025年

作者： Sisi CHEN jiemin zhanG Nan CHENG Wenbo LI Jing LIU Hongfei XIE jie zhanG Yueying CHENG Xiaotong ZHAO Meng SU Yanlin song Key Laboratory of Green Printing CAS Research/Education Center for Excellence in Molecular Sciences Institute of ChemistryChinese Academy of Sciences (ICCAS) University of Chinese Academy of Sciences Weiyang College Tsinghua University Department of Cardiovascular Surgery First Medical Center PLA General Hospital AECC Beijing Institute of Aeronautical Materials Beijing Institute of Graphene Technology Beijing Engineering Research Centre of Graphene Application School of Integrated Circuit & Beijing National Research Center for Information Science and Technology (BNRist) Tsinghua University

Surgical robots are designed to provide enhanced precision and dexterity compared to manual surgical procedures,which mainly rely on multimodal sensing technologies for the surgeon to seamlessly operate the robotic arms and *** with single-mode sensors, optical and mechanical bi-modal sensors provide improved precision, enhanced safety,and robustness of human-machine interaction systems. Here, the template-guided and pneumatic printing technologies are combined to construct perovskite and graphene parallel structures with both optical and mechanical sensing capabilities. The printed uniformly crystallized perovskite microstructure exhibits fast and sensitive photoelectric response characteristics,enabling shadow recognition functionality. The combination of graphene and elastic rubber endows the great printability to prepare parallel structures near the perovskite arrays for force sensing capabilities. Thus, the printed perovskite and graphene structures possess non-contact optical sensing capabilities to detect hand position by recognizing shadows between the hand and the sensor, as well as contact mechanical sensing capabilities to detect touch force applied by the hand. It provides a synergistic platform for real-time and multidimensional feedback to improve human-machine interaction.

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市域产教联合体建设的理论意涵、典型特征与运行机制

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教育与职业 2025年第1期 5-13页

作者：许悦宋洁南京师范大学教育科学学院常州工业职业技术学院

市域产教联合体是产教融合组织形态的创新发展，也是职业教育改革发展的重要战略任务。从哲学本体论、目的论、方法论的角度看，其建设的本体是正确界定联合体的本质，目的是实现职业教育与产业发展的双向赋能，方法上以“多元治理“”... 详细信息

市域产教联合体是产教融合组织形态的创新发展，也是职业教育改革发展的重要战略任务。从哲学本体论、目的论、方法论的角度看，其建设的本体是正确界定联合体的本质，目的是实现职业教育与产业发展的双向赋能，方法上以“多元治理“”协同共生”的理念为指引。在多元协作、共建共享、互利共赢的建设原则下，市域产教联合体呈现出区域性、开放性、生态性、复杂性等鲜明的组织特征。在此基础上，构建涵盖政策引导机制、组织治理机制、产教嵌入机制、利益共享机制、绩效评价机制的运行机制，有助于进一步规范产教主体的联动发展，推动市域产教联合体的建设。

关键词：职业教育市域产教联合体产教融合运行机制

Truncation and aliasing errors for Whittaker-Kotelnikov-Shannon sampling expansion

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Applied Mathematics(A Journal of Chinese Universities) 2012年第4期27卷 412-418页

作者： YE Pei-xin song zhan.jie School of Mathematics and LPMC Nankai UniversityTianjin 300071China Department of Mathematics School of ScienceTianjin UniversityTianjin 300072China

Let B^pΩ, 1 ≤ p 〈 ∞, be the space of all bounded functions from Lp（R） which can be extended to entire functions of exponential type Ω. The uniform error bounds for truncated Whittaker-Kotelnikov-Shannon series based on local sampling are derived for functions f ∈ B^pΩ without decay assumption at infinity. Then the optimal bounds of the aliasing error and truncation error of Whittaker-Kotelnikov-Shannon expansion for non-bandlimited functions from Sobolev classes L/（Wp（R）） are determined up to a logarithmic factor.

关键词： Whittaker-Kotelnikov-Shannon theorem localized sampling truncation error aliasing error,Sobolev class.

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汉末三国的军师

南都学坛 2025年第1期45卷 1-12页

作者：宋杰首都师范大学历史学院北京100089

“军师”是为君主将帅谋划作战事务的文职官员,周代尊称为“师”,两汉之际始称“军师”。汉末三国曹操的首位军师是周,后来荀攸作为军师跟随他征伐中原,屡立奇功。曹操被封魏公后,设立有中军师、前军师、左右军师等,文帝以降又在中军和... 详细信息

“军师”是为君主将帅谋划作战事务的文职官员,周代尊称为“师”,两汉之际始称“军师”。汉末三国曹操的首位军师是周,后来荀攸作为军师跟随他征伐中原,屡立奇功。曹操被封魏公后,设立有中军师、前军师、左右军师等,文帝以降又在中军和边防外军都督属下置军师,参赞军务,代表朝廷监督主将。蜀汉刘备先后任命诸葛亮为军师中郎将、军师将军,有带兵的权力。诸葛亮执政后设前军师、中军师等荣誉官衔,到他死后逐渐取消。孙吴长期未设军师,曾经颁授的也只是荣誉性的附加职衔,起不到为君主参议军事的作用。吴、蜀军师的虚设与消亡,与其人才匮乏有密切关系。

关键词：师军师祭酒周荀攸诸葛亮

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Uniform Truncation Error for Shannon Sampling Expansion from Local Averages

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Acta Mathematicae Applicatae Sinica 2015年第1期31卷 121-130页

作者： zhan.jie song Pei-xin YE Ping WANG Shou-zhen ZENG School of Science and SKL of HESS Tianjin University School of Mathematics and LPMC Nankai University Department of Mathematics School of Science Tianjin University Institute of Mathmatics Zhejiang Wanli University

Let B^pΩ,1≤Р≤∞,be the set of all bounded functions in L^p（R）which can be extended to entire unctions of exponential typeΩ. The unitbrm bounds for truncation error of Shannon sampling expansion fromlocal averages are obtained for functions f∈BpΩwith the decay condition f（t）≤A/t^δ,t≠0,where A and δare positive constants. Furthermore we also establish similar results for non-bandlimit functions in Besov classes with the same decay condition as above.

关键词： Shannon sampling Theorem local averages truncation error modulus of continuity

Influence of High-Pressure Nitrogenation on the Structure,Magnetism and Microwave Absorption Properties of SmFe_(10)Mo_2

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Acta Metallurgica Sinica(English Letters) 2015年第6期28卷 781-786页

作者： Nai-Kun Sun jie Guo Sheng-jie Du song-Ning Xu Ping-zhan Si Jin-Jun Liu School of Science Shenyang Ligong University College of Materials Science and Engineering China Jiliang University Faculty of Materials Science and Chemical Engineering Ningbo University

Nitrogenation of SmFelolVIo2 powders was performed in a self-made furnace under a high-purity N2 atmo- sphere up to 40 MPa at 500 ℃. Upon nitrogenation at atmospheric pressure, the lattice parameters a and c increase by 0.5% and 2.7%, respectively, whereas the Curie temperature Tc increases from 519 to 633 K. With further increasing the nitrogenation pressure to 20 and 40 MPa, the 1：12 main phase starts to decompose and a large amount of Mo and a-Fe precipitates. This leads to variation of Mo concentration in the 1：12 phase and causes a sharp decrease in Tc and in the coercivity. The relative complex permittivity and permeability of paraffin-SmFeloMO2 composites show multi-resonant behavior. After nitrogenation, the magnetic loss of the powders decreases, which may originate from the influence of eddy currents due to the increase in the particle size.

关键词： High-pressure nitrogenation SmFeloMO2-based compounds Curie temperature Microwaveabsorption

Synthesis and characterization of imide modified poly(dimethylsiloxane) with maleopimaric acid as raw material

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Chinese Chemical Letters 2015年第5期26卷 572-574页

作者： Tao Xu He Liu jie song Shi-Bin Shang zhan-Qian song Xiu-jie Chen Chong Yang Institute of Chemical Industry of Forestry Products Chinese Academy of ForestryKey Laboratory of Biomass Energy and MaterialNational Engineering Laboratory for Biomass Chemical UtilizationKey and Open Laboratory on Forest Chemical EngineeringSFA Shenzhen Guanheng New Materials Technology Co. Ltd. Department of Chemistry and Biochemistry University of Michigan-Flint

With the natural rosin derivative （maleopimaric acid, MPA） as the raw material, imide modified vinyl poly（dimethylsiloxane）（MP-VMS） was synthesized and characterized by ^1H NMR and ^13C NMR. The curing kinetic parameters of MP-VMS were determined by differential scanning calorimetry （DSC） at various heating rates （5, 8, 10, 15 ℃/min） from the Kissingner, Ozawa and Crane methods. The activation energy （Ea）, pre-exponential factor （A） and reaction order （n） were respectively 18.6 kJ/mol, 71,108 and 0.902. The low-temperature and high-temperature resistance of its curing product were respectively investigated by DSC and thermogravimetric analysis. The results showed that incorporation of MPA could significantly improve the thermal stability of silicone while had no effect on the low-temperature resistance, and the Tmax （the temperature corresponding to the maximum weight loss rate） increased by 70.7 ℃.

关键词： Maleopimaric acid lmide Polysiloxane Curing kinetics Differential scanning calorimetry (DSC)

Learning real-time automata

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Science China(Information Sciences) 2021年第9期64卷 57-73页

作者： jie AN Lingtai WANG Bohua zhan Naijun zhan Miaomiao zhanG School of Software Engineering Tongji University State Key Laboratory of Computer Science Institute of Software Chinese Academy of Sciences University of Chinese Academy of Sciences

Real-time automata(RTAs) are a subclass of timed automata with only one clock which resets at each transition. In this paper, we present an active learning algorithm for deterministic real-time automata(DRTAs) in both continuous-time semantics and discrete-time semantics. For a target language recognized by a DRTA A, we convert the problem of learning DRTA A to the problem of learning a canonical real-time automaton A with the same recognized language, i.e., L(A) = L(A). The algorithm is inspired by existing learning algorithms for symbolic automata.

关键词： automaton learning active learning real-time automata