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arXiv 2025年

作者： Cui, Ying Qiu, Kongxin Gao, Shan Liu, Hailong Gao, Rongyan Chen, Liwei Zhang, Zezhan Jiang, Jing Niu, Yi Wang, Chao Key Laboratory of Advanced Marine Communication and Information Technology Ministry of Industry and Information Technology School of Information and Communication Engineering Harbin Engineering University Harbin150001 China 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 Chengdu611731 China State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision Instrument Tsinghua University Beijing100084 China

The key challenge in multispectral radiation thermometry is accurately measuring emissivity. Traditional constrained optimization methods often fail to meet practical requirements in terms of precision, efficiency, and noise resistance. However, the continuous advancement of neural networks in data processing offers a potential solution to this issue. This paper presents a multispectral radiation thermometry algorithm that combines Transformer, LSTM (Long Short-Term Memory), and SVM (Support Vector Machine) to mitigate the impact of emissivity, thereby enhancing accuracy and noise resistance. In simulations, compared to the BP neural network algorithm, GIM-LSTM, and Transformer-LSTM algorithms, the Transformer-LSTM-SVM algorithm demonstrates an improvement in accuracy of 1.23%, 0.46% and 0.13%, respectively, without noise. When 5% random noise is added, the accuracy increases by 1.39%, 0.51%, and 0.38%, respectively. Finally, experiments confirmed that the maximum temperature error using this method is less than 1%, indicating that the algorithm offers high accuracy, fast processing speed, and robust noise resistance. These characteristics make it well-suited for real-time high-temperature measurements with multi-wavelength thermometry equipment. Copyright © 2025, The Authors. All rights reserved.

关键词： Constrained optimization

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Learnable Topology Enhanced Heterogeneous Network for Unbalanced Cross-Domain Fault Diagnosis

Learnable Topology Enhanced Heterogeneous Network for Unbala...

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International Conference on Sensing, Diagnostics, Prognostics, and Control (SDPC)

作者： Zixu Chen Wennian Yu Qing Ni Jinchen Ji State Key Laboratory of Mechanical Transmission for Advanced Equipment Chongqing University Chongqing China School of Mechanical and Mechatronic Engineering University of Technology Sydney Sydney Australia

ISBN: (数字)9798350388855

ISBN: (纸本)9798350388862

The emerging graph convolutional networks (GCN) have led to their widespread application in fault diagnosis due to their advantages in feature extraction. However, there are still some limitations of the GCN-based methods in the face of cross-domain diagnostic tasks. First, in most of the existing studies, the graph topology is constructed according to certain criteria. However, the fixed topology may contain domain-specific information, which could hinder the extraction of domain-invariant features. Second, the class unbalanced data would lead to training bias, degrading the diagnostic performance for the minority classes of data. In order to address the challenges posed by these limitations to cross-domain diagnostics, this paper proposed a learnable topology enhanced heterogeneous network (LTHN). First, a learnable topology-aware module is designed to update the multi-sensor graph topology and augment the unbalanced data in a non-parametric manner. Then, a fault detection induced binary classifier and a fine-grained classification induced multi-class classifier form a heterogeneous network, which is able to avoid biased training by reweighting the data according to the pairwise heterogeneous inferences. Finally, the multi-class classifier output the diagnostic result. Cross-domain diagnostic experiments were conducted on the constructed sliding bearing test rig. Comparative studies with the state-of-the-art methods showed the effectiveness and the superiority of the proposed method.

关键词： Training Fault diagnosis Network topology Graph convolutional networks Fault detection Feature extraction Heterogeneous networks Topology Sensors Faces

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Sinusoidal and nonsinusoidal patterns in amplitude envelope synchronization

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Physical Review E 2022年第4期105卷 044209-044209页

作者： Hanchang Liu Weiqing Liu Chaoxin Fu Meng Zhan School of Science Jiangxi University of Science and Technology Ganzhou 341000 China School of Electronic Information and Communications Huazhong University of Science and Technology Wuhan 430074 China State Key Laboratory of Advanced Electromagnetic Engineering and Technology and School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan 430074 China

In this work, amplitude envelope synchronization (AES), as a general phenomenon characterized with highly correlated amplitude envelope but uncorrelated phases and frequencies in coupled nonidentical nonlinear systems, is investigated theoretically and numerically. Two different types of AES patterns, including sinusoidal and nonsinusoidal, are widely observable in coupled periodic and/or chaotic oscillators. They both come from modulation of phase mismatch on amplitude but show different patterns due to different behaviors of phase mismatch. With increase of frequency mismatch, the system tends to crossover from nonsinusoidal to sinusoidal AES. With the aid of synchronization manifold and transverse stability analyses of the AES state, the physical mechanism and scale relations for the AES are well revealed. We expect that all these results could uncover the generality of AES in coupled nonlinear oscillators and help to understand the rich dynamics of phase and amplitude coupling in multidisciplinary fields.

关键词： Coupled oscillators Synchronization

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Welcoming Message

Textile Bioengineering and Informatics Symposium Proceedings...

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Textile Bioengineering and Informatics Symposium Proceedings, TBIS 2024年 2024-August卷

作者： Zhu, Meifang State Key Laboratory for Modification of Chemical Fibers and Polymer Materials China College of Materials Science and Engineering Donghua University China Innovation Base of Advanced Fabrication Technology of Fiber Materials China

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High thermoelectric and mechanical performance in the n-type polycrystalline SnSe incorporated with multi-walled carbon nanotubes

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Journal of Materials Science & technology 2022年第19期114卷 55-61页

作者： Xin-Yu Mao Xiao-Lei Shi Liang-Chuang Zhai Wei-Di Liu Yue-Xing Chen Han Gao Meng Li De-Zhuang Wang Hao Wu Zhuang-Hao Zheng Yi-Feng Wang Qingfeng Liu Zhi-Gang Chen State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China Centre for Future Materials University of Southern QueenslandSpringfield CentralBrisbane4300Australia School of Chemistry and Physics Queensland University of TechnologyBrisbaneQLD 4000Australia Australian Institute for Bioengineering and Nanotechnology The University of QueenslandBrisbaneQLD 4072Australia Shenzhen Key Laboratory of Advanced Thin Films and Applications Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China Key Laboratory of Material Physics of Ministry of Education School of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450052China School of Mechanical and Mining Engineering The University of QueenslandSt LuciaBrisbaneQLD 4072Australia College of Materials Science and Engineering Nanjing Tech UniversityNanjing 211816China Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites Nanjing Tech UniversityNanjing 211816China CAS Key Laboratory of Carbon Materials Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001China

In this study,we introduce multi-walled carbon nanotubes(MWCNTs)in Pb/I co-doped n-type polycrys-tal SnSe to simultaneously improve its thermoelectric and mechanical properties for the first *** introduced MWCNTs act as the“bridges”to accelerate the electron carrier transport between SnSe grains,leading to significantly increased electrical conductivity from 32.6 to 45.7 S cm^(−1) at 773 K,which con-tributes to an enhanced power factor of∼5.0μW cm^(−1) K^(−2) at this *** MWCNTs possess high intrinsic thermal conductivities,these MWCNTs,acting as nanoinclusions in the SnSe matrix to form the dense interfaces between SnSe and MWCNTs,provide extra heat-carrying phonon scattering centers,leading to a slightly reduced lattice thermal conductivity of only 0.34 W m^(−1) K^(−2) at 773 K and in turn,a high ZT of∼1.0 at this ***,the introduced MWCNTs can simultane-ously act as the“binders”to bond adjacent grains,significantly improving the mechanical properties of SnSe by boosting its Vickers hardness from 39.5 to *** work indicates that our facile approach can achieve high thermoelectric and mechanical properties in n-type SnSe polycrystals with a considerable potential for applying to thermoelectric devices as n-type elements.

关键词： Thermoelectric property SnSe N-type Multi-walled carbon nanotubes Mechanical property

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Enhanced Photocatalytic H_(2)-production Activity of CdS Nanoflower using Single Atom Pt and Graphene Quantum Dot as Dual Cocatalysts

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Chinese Journal of Structural Chemistry 2022年第6期41卷 6-14页

作者： Yi Yang Jinsong Wu Bei Cheng Liuyang Zhang Ahmed Abdullah Al-Ghamdi Swelm Wageh Youji Li State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Nanostructure Research Centre(NRC)Wuhan University of TechnologyWuhan 430070China Laboratory of Solar Fuel Faculty of Materials Science and ChemistryChina University of GeosciencesWuhan 430074China Department of Physics Faculty of ScienceKing Abdulaziz UniversityJeddah 21589Saudi Arabia College of Chemistry and Chemical engineering Jishou UniversityJishouHunan 416000China

Single-atom catalysts have high catalytic activity due to their unique quantum size effects and optimal atom ***,visi-ble-light-responsive photocatalysts were designed by coupling CdS with graphene quantum dots(GQDs)and platinum single atoms(PtSAs).GQDs and PtSAs were successively loaded on ultrathin CdS nanosheets through freeze-drying and in-situ photocatalytic *** synergistic effect between PtSAs and GQDs results in superior photocatalytic activity with a hydrogen production rate of 13488μmol h^(-1)g^(-1)as well as the maximum apparent quantum efficiency(AQE)of 35.5%in lactic acid aqueous solution,which is 62 times higher than that of pristine CdS(213μmol g^(-1)h^(-1)).The energy conversion efficiency is ca.13.05%.As a photosensitizer and an electron reservoir,GQDs can not only extend the light response of CdS to the visible-light region(400-800 nm),but also promotes the separation of photoinduced electron-hole ***,PtSAs,with unique electronic and geometric features,can provide more efficient proton reduction *** finding provides an effective strategy to remarkably improve the photocatalytic H_(2) production performance.

关键词： hierarchical nanostructure single-atom catalysts graphene quantum dots CdS nanosheets hydrogen production

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High-throughput and reliable acquisition of in vivo turnover number fuels precise metabolic engineering

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Synthetic and Systems Biotechnology 2022年第1期7卷 541-543页

作者： Zhenghong Li Chengyu Zhang Zhengduo Wang Hao Yan Chuan Li Zhiheng Yang Zilong Li Lixin Zhang Weishan Wang Shenzhen Institute of Synthetic Biology Shenzhen Institutes of Advanced TechnologyChinese Academy of Sciences518055ShenzhenChina State Key Laboratory of Microbial Resources Institute of MicrobiologyChinese Academy of SciencesBeijing100101China State Key Laboratory of Bioreactor Engineering And School of BiotechnologyEast China University of Science and Technology(ECUST)Shanghai200237China University of Chinese Academy of Sciences Beijing 100049China

As synthetic biology enters the era of quantitative biology,mathematical information such as kinetic parameters of enzymes can offer us an accurate knowledge of metabolism and growth of cells,and further guidance on precision metabolic engineering.k_(cat),termed the turnover number,is a basic parameter of enzymes that describes the maximum number of substrates converted to products each active site per unit *** reflects enzyme activity and is essential for quantitative understanding of ***,the k_(cat) values are measured in vitro,thus may not be able to reflect the enzyme activity in *** this case,Davidi et *** a surrogate K^(vivo)_(max)(k_(app))for kcat and developed a high throughput method to acquire K^(vivo)_(max)from omics *** et *** Chen et *** that the surrogate parameter can be a good embodiment of the physiological state of enzymes and exhibit superior performance for enzyme-constrained metabolic model to the default *** breakthroughs will fuel the development of system and synthetic biology.

关键词： Turnover number Genome scale models High throughput Metabolic reconstitution Machine learning

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Non-equivalent D-A copolymerization strategy towards highly efficient polymer donor for polymer solar cells

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Science China Chemistry 2021年第6期64卷 1031-1038页

作者： Ziya Shang Liuyang Zhou Chenkai Sun Lei Meng Wenbin Lai Jinyuan Zhang Wenchao Huang Yongfang Li Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China School of Chemical Science University of Chinese Academy of SciencesBeijing 100049China College of Chemistry Green Catalysis CenterZhengzhou UniversityZhengzhou 455001China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshan 528216China Laboratory of Advanced Optoelectronic Materials College of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China

D-A copolymerization is a broadly utilized molecular design strategy to construct high efficiency photovoltaic materials for polymer solar cells(PSCs),and all the D-A copolymer donors reported till now are the alternate D-A copolymers with equal D-and ***,we first propose a non-equivalent D-A copolymerization strategy with unequal D-and A-units,and develop three novel non-equivalent D-A copolymer donors(PM6-D1,PM6-D2 and PM6-D3 with D/A unit ratio of 1.1:0.9,1.2:0.8 and1.3:0.7,respectively)by inserting more D units into the alternate D-A copolymer PM6 backbone to finely tune the physicochemical and photovoltaic properties of the *** three non-equivalent D-A copolymers show the down-shifted highest occupied molecular orbital(HOMO)energy levels,higher hole mobility,higher degree of molecular self-assembly and higher molecular crystallinity with the increase of D-unit ratio in comparison with the alternate D-A copolymer *** a result,all the three non-equivalent D-A copolymer-based PSCs with Y6 as acceptor achieve improved power conversion efficiency(PCE)with higher V_(oc),larger J_(sc)and higher FF ***,the PM6-D1:Y6 based PSC achieved a high PCE of17.71%,which is significantly higher than that(15.82%)of the PM6:Y6 based PSC and is one of the highest performances in the binary PSCs.

关键词： polymer solar cells conjugated polymer donor materials donor-acceptor copolymers non-equivalent D-A copolymerization

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Design and Simulation of Input Cavity of W-Band Extended Interaction Klystron

Design and Simulation of Input Cavity of W-Band Extended Int...

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International Conference on Vacuum Electronics

作者： Wanli Shi Zheng Tan Guoxin Ren Shilong Zhu Haiying Yuan Luanfeng Gao Xiaofang Zhu Bin Li Yulu Hu National Key Laboratory of Science and Technology on Vacuum Electronics Key Laboratory of Large-Scale Electromagnetic Industrial Software Ministry of Education School of Electronic Science and Engineering UESTC Chengdu P.R. China Shenzhen Institute for Advanced Study UESTC Shenzhen P.R. China

ISBN: (数字)9798350348705

ISBN: (纸本)9798350348712

The Extended Interaction Klystron (EIK) amplifier is a high-power, high-frequency microwave device widely used in millimeter-wave band. Through the input cavity of an extended interaction klystron, the external microwave signal is introduced and the microwave electric field is established across the cavity gap, thus, the passing electron beam is modulated. This paper analyzes the key considerations in the cavity design of extended interaction klystrons, which encompass operating mode, synchronization condition, effective impedance and normalized electron beam conductance. Finally, a 9-gaps input cavity for W-band extended interaction klystron is designed and analyzed using CST Studio Suite.

关键词： Electron beams Klystrons Microwave amplifiers Vacuum electronics Synchronization Impedance Electron sources Electric fields

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Secondary crystallization strategy for highly efficient inorganic CsPbI_(2)Br perovskite solar cells with efficiency approaching 17%

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Journal of Energy Chemistry 2021年第12期30卷 558-565,I0013页

作者： Jing Ma Zhenhua Lin Xing Guo Long Zhou Jian He Zhou Yang Jincheng Zhang Yue Hao Shengzhong Liu Jingjing Chang State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology Shaanxi Joint Key Laboratory of GrapheneSchool of MicroelectronicsXidian University2 South Taibai RoadXi’an 710071ShaanxiChina Advanced Interdisciplinary Research Center for Flexible Electronics Xidian University2 South Taibai RoadXi’an 710071ShaanxiChina Key Laboratory of Applied Surface and Colloid Chemistry National Ministry of Education Shaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710119ShaanxiChina

Inorganic CsPbI_(2) Br perovskite solar cells(PSCs) have a tremendous development in last few years due to the trade-off between the excellent optoelectronic properties and the relatively outstanding ***,we demonstrated a strategy of secondary crystallization(SC) for CsPbI_(2) Br film in a facile planar n-i-p structure(ITO/ZnO-SnO_(2)/CsPbI_(2) Br/Spiro-OMeTAD/Ag) at low-temperature(150℃).It is achieved through the method of post-treatment with guanidinium bromine(GABr) atop annealed CsPbI_(2) Br *** was found that the secondary crystallization by GABr can not only regulate the crystal growth and passivate defects,but also serve as a charge collection center to effectively collect photogenerated *** addition,due to the excess Br ions in GABr,the formation of the Br-rich region at the CsPbI_(2) Br perovskite surface can further lower the Fermi level,leading to more beneficial band alignment between the perovskite and the hole transport layer(HTL),while the phase stability was also *** a result,the champion cell shows a superb open-circuit voltage(V_(oc)) of 1.31 V,a satisfactory power conversion efficiency(PCE) of 16.97% and outstanding *** far as we know,this should be one of the highest PCEs reported among all-inorganic CsPbI_(2) Br based PSCs.

关键词： CsPbI_(2)Br Low temperature Secondary crystallization High performance

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