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Study of AWG optoelectronic hybrid integrated chip for FBG interrogation

Optoelectronics Letters 2024年

作者： YANG Yiyao YUAN Pei XU Ran LI Bingxiang Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument， Beijing Information Science & Technology University Beijing Laboratory of Optical Fiber Sensing and System， Beijing Information Science & Technology University

To achieve continuous demodulation， high precision， and high resolution in the C-band， this paper designs simulates and prepares a 30-channel array waveguide grating (AWG) based on a silicon dioxide planar optical circuit for Fiber Bragg Grating (FBG) interrogation and couples the prepared AWG with a photodetector array using hybrid integration technology. The test results indicate that the AWG has a good transmission spectrum， a 3-dB bandwidth of 2.15 nm， an insertion loss of approximately 3.6-4.2 dB， and crosstalk of less than -30 dB. The FBG interrogation system can achieve continuous demodulation in the dynamic range of 1521-1569 nm， and realize continuous demodulation in the C-band with a wavelength resolution of 1 pm and a demodulation accuracy of 5.8 pm. This demodulation method provides an optimization direction for researching fiber Bragg grating interrogation systems based on array waveguide gratings.

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Trustworthy DNN partition for blockchain-enabled digital twin in wireless IIoT networks

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science China(information sciences) 2024年第11期67卷 373-374页

作者： Xiumei DENG Jun LI Long SHI Kang WEI Ming DING Yumeng SHAO Wen CHEN Shi JIN Pillar of Information Systems Technology and Design Singapore University of Technology and Design National Mobile Communications Research Laboratory Southeast University School of Electronic and Optical Engineering Nanjing University of Science and Technology Department of Computing Hong Kong Polytechnic University Data61 CSIRO Department of Electronics Engineering Shanghai Jiao Tong University

The integration of artificial intelligence(AI) and digital twin(DT) technology has revolutionized the industrial Internet of Things(IIoT), enabling advanced automation and intelligent manufacturing [1]. Through sophisticated interactions between physical entities and their virtual counterparts,AI-driven DTs facilitate performance monitoring, analysis,simulation, and optimization of physical assets, enabling predictive maintenance and informed decision-making [2].

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Simultaneous acceleration of sulfur reduction and oxidation on bifunctional electrocatalytic electrodes for quasi-solid-state Zn–S batteries

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science China Chemistry 2024年第5期67卷 1531-1538页

作者： Mingli Wang Hong Zhang Tianhang Ding Fangjun Wu Lin Fu Bin Song Pengfei Cao Ke Lu Institutes of Physical Science and Information Technology School of Materials Science and EngineeringKey Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of EducationAnhui UniversityHefei 230601China Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of ChinaHefei 230026China School of Chemistry and Chemical Engineering Harbin Institute of TechnologyHarbin 150001China School of Chemistry and Chemical Engineering Guizhou UniversityGuiyang 550025China Institute of Functional Nano&Soft Materials(FUNSOM) Soochow UniversitySuzhou 215123China State Key Lab of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China

The incomplete sulfur reduction and high ZnS re-oxidation energy barrier along with severe side reactions during the battery cycling compromise the practical application of Zn–S electrochemistry. Herein, a bifunctional electrocatalytic sulfur matrix that simultaneously accelerates the sulfur reduction and ZnS oxidation is proposed to realize a highly-efficient Zn–S cell. It is revealed that the N-heteroatom hotspots are more favorable for facilitating the conversion of S to ZnS while the CoO nanocrystal substantially lowers the ZnS activation energy barrier thereby suppressing the formation of disproportionation species(e.g.,SO_(4)^(2-)) and accumulation of inactive ZnS. Accordingly, the Co O anchored on the N-doped carbon-supported sulfur cathode delivers a high Zn^(2+)storage capacity of 1,172 m Ahg^(-1)and outstanding cycling stability with a capacity retention of 71.6% after500 cycles with a high average Coulombic efficiency of 97.8%. Simultaneously, the stable cycling of solid-state Zn–S pouch cells with an energy density of 585 Whkg^(-1)sulfuris also demonstrated. Moreover, the postmortem analysis reveals that the degradation of Zn–S cells is mainly attributed to the limited reversibility of Zn anodes rather than the ZnS decomposition and/or accumulation. The approach to the bidirectional catalysis manipulated the sulfur redox provides a new perspective to realize the theoretical potentials of Zn–S cells.

关键词： Zn–S battery bifunctional catalysts solid-state battery sulfur redox degradation mechanism

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Distributed Optimization and Scaling Design for Solving Sylvester Equations

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Journal of systems science & Complexity 2024年第6期37卷 2487-2510页

作者： CHENG Songsong YU Xin ZENG Xianlin LIANG Shu HONG Yiguang Anhui Engineering Laboratory of Human-Robot Integration System and Intelligent Equipment School of Electrical Engineering and AutomationAnhui UniversityHefei 230601China Key Laboratory of Intelligent Control and Decision of Complex Systems School of AutomationBeijing Institute of TechnologyBeijing 100081China Department of Control Science and Engineering Tongji UniversityShanghai 201804China Shanghai Research Institute for Intelligent Autonomous Systems Tongji UniversityShanghai 201210China

This paper develops distributed algorithms for solving Sylvester *** authors transform solving Sylvester equations into a distributed optimization problem,unifying all eight standard distributed matrix *** the authors propose a distributed algorithm to find the least squares solution and achieve an explicit linear convergence *** results are obtained by carefully choosing the step-size of the algorithm,which requires particular information of data and Laplacian *** avoid these centralized quantities,the authors further develop a distributed scaling technique by using local information *** a result,the proposed distributed algorithm along with the distributed scaling design yields a universal method for solving Sylvester equations over a multi-agent network with the constant step-size freely chosen from configurable ***,the authors provide three examples to illustrate the effectiveness of the proposed algorithms.

关键词： Distributed optimization least squares solution linear convergence rate step-size interval Sylvester equation

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SIMULATION CALCULATION AND OPTIMIZATION OF AERIAL REFUELING OF AIRCRAFT FUEL system

SIMULATION CALCULATION AND OPTIMIZATION OF AERIAL REFUELING ...

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2024 CSAA/IET International Conference on Aircraft Utility systems, AUS 2024

作者： Wang, Chenchen Wang, Yangyang Gu, Lixin AVIC Nanjing Engineering Institute of Aircraft Systems The Aviation Electromechanical System Integration of Aviation Science and Technology Key Laboratory Nanjing211106 China

In order to ensure that the initial design of the fuel system meets the requirements of aircraft aerial refueling and related standards, a simulation model of an aircraft fuel system was established based on the AMESim simulation platform. The aerial refueling process was calculated under given conditions, and the initial design of the fuel system is optimized based on the calculation results. Results showed that both the initial and optimized fuel systems meet the requirements for refueling time, and the requirements of electrostatic protection for the fuel flow rate inside the pipeline and inlet of the fuel tank during refueling. The optimized fuel system has a more similar refueling rate for each fuel tank and can effectively reduce the weight of fuel system's pipelines. The calculation results can provide guidance for the initial design of fuel system. © The Institution of engineering & technology 2024.

关键词： Aircraft fuels

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Establishment of compound database of emerging antioxidants and high-resolution mass spectrometry screening in lake sediment from Taihu Lake Basin, China

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Environmental science and Pollution Research 2024年第19期31卷 28341-28352页

作者： Su, Huijun Li, Jianhua Ye, Langjie Su, Guanyong Key Laboratory of Environmental Remediation and Ecological Health Ministry of Industry and Information Technology School of Environmental and Biological Engineering Nanjing University of Science and Technology Nanjing210094 China Shaanxi Key Laboratory of Low Metamorphic Coal Clean Utilization Yulin Engineering Research Center of Coal Chemical Wastewater School of Chemistry and Chemical Engineering Yulin University Yulin719000 China

Antioxidants are ubiquitous in various environmental samples, leading to increasing concern regarding their potential risk to environments or humans. However, there is dearth of information regarding the environmental fate of antioxidants and unknown/unexpected antioxidants in the environment. Here, we established a compound database (CDB) containing 320 current-used antioxidants by collecting the chemicals from EPA’s functional use database and published documents. Physical–chemical characteristics of these antioxidants were estimated, and 19 ones were considered as persistent and bioaccumulative (P&B) substances. This CDB was further coupled with high resolution mass spectrometry (HRMS) technique, which was employed for suspect screening of antioxidants in extracts of sediments (n = 88) collected from Taihu Lake basin. We screened 119 HRMS features that can match 135 chemical formulas in the CDB, and 20 out of them exhibited the detection frequencies ≥ 90%. The total concentrations of suspect antioxidants in sediments ranged from 6.41 to 830 ng/g dw. Statistical analysis demonstrated that concentrations of suspect antioxidants in Taihu Lake were statistically significantly lower than those in Shihu and Jiulihu Lake, but greater than those from other small lakes. Collectively, this study provided a CDB that could be helpful for further monitoring studies of antioxidant in the environments, and also provided the first evidence regarding the ubiquity of antioxidants in aquatic environment of Taihu Lake basin. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Antioxidants

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Enabling IoT Service Classification: A Machine Learning-Based Approach for Handling Classification Issues in Heterogeneous IoT Services

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IEEE Access 2023年 11卷 89024-89037页

作者： Abbasi, Mohammad Asad Chen, Yen-Lin Khan, Abdullah Ayub Memon, Zulfiqar A. Durrani, Nouman M. Yang, Jing Ku, Chin Soon Por, Lip Yee Benazir Bhutto Shaheed University Lyari Department of Computer Science and Information Technology Karachi75660 Pakistan National Taipei University of Technology Department of Computer Science and Information Engineering Taipei106344 Taiwan Sindh Madressatul Islam University Department of Computer Science Karachi74000 Pakistan -FAST Department of Computer Science Islamabad44000 Pakistan Universiti Malaya Faculty of Computer Science and Information Technology Department of Computer System and Technology Kuala Lumpur50603 Malaysia Universiti Tunku Abdul Rahman Department of Computer Science Kampar31900 Malaysia

The Internet of Things (IoT) is a form of Internet-based distributed computing that allows devices and their services to interact and execute tasks for each other. Consequently, the footprint of the IoT is increasing and becoming more complex to the highest degree. This has also given birth to new IoT-enabled applications and services. Efficient service interaction and management also call for understanding and analyzing the nature of IoT services. Further, IoT services must be characterized into various classes, and different service-related attributes must be considered for the classification. This article assesses the requirements of heterogeneous IoT services by examining their interactions. Principally, heterogeneous IoT and their service interactions are targeted. The research work performs classification of IoT services into various classes. Services are classified on the basis of various attributes. The attributes reflect different characteristics of the services. This research enables improved utilization of IoT services through efficient classification of available resources using machine learning methods. To demonstrate service classification applicability, the SVM, voting classifier, and decision tree have been applied in a service-oriented environment along with different types of services. All the services in the data set were analyzed and divided into five classes. Moreover, the decision tree performed well and achieved higher accuracy values in all classes. However, the overall prediction and classification of the decision tree model were observed to be good and satisfactorily high. © 2013 IEEE.

关键词： Decision trees

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Research on Shipborne Laser Communication Optical Stability Control technology 7

Research on Shipborne Laser Communication Optical Stability ...

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7th International Conference on Imaging, Signal Processing and Communications, ICISPC 2023

作者： Shen, Shao-Nan Zhao, Zhan-Feng Wang, Xiao-Yan Wang, Zhen-Xing Zhang, Ting-Ting Zhang, Chen-Yang Harbin Institute of Technology School of Information Science and Engineering Weihai China Aerospace System Engineering Shanghai First Project Sector Shanghai China

ISBN: (纸本)9798350325072

Free space laser communication is a promising technology with numerous advantages, such as high resistance to electromagnetic interference, excellent confidentiality, and fast information transmission rates. It has broad application prospects in both military and civilian fields. However, the application of this technology on ships poses many challenges. For instance, the ship's motion trajectory and speed cannot be determined precisely, making it difficult to initially align the line of sight. Furthermore, the ship's motion is strongly affected by waves at sea, causing six degrees of freedom attitude disturbance and making it challenging to maintain stable line-of-sight alignment. To address these issues, we propose a shipborne wireless laser communication line-of-sight stabilization control technology that provides a robust guarantee for ships to establish and maintain stable communication links at sea. Our approach relies on GPS navigation positioning equipment, attitude sensors, and servo turntables to build a shipborne wireless laser communication line-of-sight stabilization control platform. Specifically, we design methods for initial alignment and attitude disturbance compensation of the line of sigh. Our experimental results demonstrate that our method effectively solves the problem of attitude disturbance in shipborne wireless laser communication systems and improves the speed of initial alignment of the line of sight. Overall, our proposed technology offers a promising solution for enhancing the reliability and stability of laser communication systems on ships. © 2023 IEEE.

关键词： Stabilization

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Solid-phase sintering and vapor-liquid-solid growth of BP@MgO quantum dot crystals with a high piezoelectric response

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Journal of Advanced Ceramics 2022年第11期11卷 1725-1734页

作者： Qingwei LIAO Wei HOU Kexuan LIAO Liyin CHEN Yujun SONG Guowei GAO Lei QIN Key Laboratory of Sensors Beijing Information Science&Technology UniversityBeijing 100192China Key Laboratory of Modern Measurement&Control Technology Ministry of EducationBeijing Information Science&Technology UniversityBeijing 100192China Key Laboratory of Photoelectric Testing Technology Beijing Information Science&Technology UniversityBeijing 100192China School of Chemical Science and Engineering Tongji UniversityShanghai 200092China Harvard John A.Paulson School of Engineering and Applied Sciences Harvard UniversityCambridge 02138USA Center of Modern Physics Technology School of Mathematics and PhysicsUniversity of Science and Technology BeijingBeijing 100083China

Low-dimensional piezoelectric and quantum piezotronics are two important branches of low-dimensional materials,playing a significant role in the advancement of low-dimensional devices,circuits,and ***,we firstly propose a solid-phase sintering and vapor–liquid–solid growth(SS–VLS-like)method of preparing a quantum-sized oxide material,i.e.,black phosphorus(BP)@MgO quantum dot(QD)crystal with a strong piezoelectric ***-sized MgO was obtained by Mg slowly released from MgB_(2) within the confinement of a nanoflake BP *** the slow release of Mg only grows nanometer-sized MgO to hinder the further growth of MgO,we added a heterostructure matrix constraint:nanoflake *** the BP as the matrix confinement,MgO QDs embedded in the BP@MgO QD crystals were *** crystals have a layered two-dimensional(2D)structure with a thickness of 11 nm and are stable in the *** addition,piezoresponse force microscopy(PFM)images show that they have extremely strong *** strong polarity can also be proved by polarization reversal and a simple pressure sensor.

关键词： quantum dots(QDs) piezoelectric black phosphorus(BP) MgO

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Controllable selective anchoring of subnanometric Ru clusters or single-atoms/clusters on tungsten nitride for the hydrogen oxidation

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science China Chemistry 2024年第11期67卷 3749-3756页

作者： Qijiao Sun Chuanqiang Wu Yiqiang Sun Yuan Shen Lei Zhao Xiaodong Yang Li Yang Yunxiang Lin Keke Mao Kun Xu School of Chemistry and Chemical Engineering Key Laboratory of Functional Inorganic Material Chemistry of Anhui ProvinceAnhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized MaterialsKey Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of EducationAnhui UniversityHefei 230601China Information Materials and Intelligent Sensing Laboratory of Anhui Province Institutes of Physical Science and Information TechnologyAnhui UniversityHefei 230601China School of Chemistry and Chemical Engineering University of JinanJinan 250022China School of Energy and Environment Anhui University of TechnologyMa’anshan 243032China

The impregnation method in the preparation of metal cluster catalysts typically inadvertently introduces single atoms(SAs) into the substrate. However, the question of whether the introduction of SAs will further improve the catalytic activity of cluster systems for specific reactions such as the hydrogen oxidation reaction(HOR) remains unraveled. Herein, we demonstrate Ru clusters anchored on WN nanowires(RuC/WN) show a higher alkaline HOR catalytic activity in comparison with Ru SAs and nanoclusters(NCs)-coupled catalyst anchored on WN nanowires system(RuC,S/WN). Notably, the RuC/WN exhibits superb intrinsic catalytic activity with a mass-normalized exchange current density of 890 m A mg^(-1)PGM, which is among the top level of well developed Ru-based HOR catalysts. Both theoretical simulation and experimental investigation suggest that RuC/WN owns an optimized H^(*)and OH^(*) reaction intermediates for the alkaline HOR, therefore resulting in the excellent intrinsic HOR catalytic performance.

关键词： hydrogen oxidation reaction Ru cluster catalyst Ru single atoms and nanoclusters coupled catalyst tungsten nitride substrate

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