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Signal space transform and multidimensional information joint processing for moving target

Chinese Journal of Acoustics 2024年第1期43卷 23-48页

作者： SHI Yunjia PIAO Shengchun GUO Junyuan ZHANG Liu Acoustic Science and Technology Laboratory Harbin Engineering UniversityHarbin 150001 Key Laboratory of Marine Information Acquisition and Security(Harbin Engineering University) Ministry of Industry and Information TechnologyHarbin 150001 College of Underwater Acoustic Engineering Harbin Engineering UniversityHarbin 150001

A signal space transform method for detection of line spectrum signals radiated by moving target is *** time-frequency analysis and beamforming processing,a three-dimensional(3D)time-frequency-azimuth signal space is obtained in the array coordinate *** certain target course angle,this 3D signal space is transformed to the time-frequency-relative bearing spectrum signal space in the target coordinate *** theoretical derivation,simulation,and experimental data processing are *** findings demonstrate that the method is capable of converting the target line spectrum signal 3D trajectory to a 2D trajectory on the corresponding slice in the transformed signal space and signal processing gain of multi-dimensional information joint processing is obtained easier than in 3D signal space.

关键词： system. moving transformed

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Constructing lithiophilic sites-rich artificial solid electrolyte interphase to enable dendrite-free and corrosion-free lithium-sulfur batteries

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Green Energy & Environment 2024年第12期9卷 1891-1900页

作者： Wei Lu Anshun Zhao Qiuxu Chen Sihan Liu Mingxi Yu Zihao Wang Ze Gao Xue Zhao Guiru Sun Ming Feng Key Laboratory of Functional Materials Physics and Chemistry Ministry of Education Jilin Normal UniversityChangchunJilin130103China College of Information Technology Jilin Engineering Research Center of Optoelectronic Materials and DevicesJilin Normal UniversitySipingJilin136000China School of Science Changchun University of Science and TechnologyChangchunJilin130022China

An artificial solid electrolyte interphase(SEI)with lithiophilic sites and chemical bonds anchoring lithium polysulfides(LiPSs)has been developed as a potential solution to protect the lithium(Li)metal anode of Lithium-sulfur(Li-S)*** strategy aims to guide consistent Li deposition and relieve lithium ***,the evolution process of lithiophilic sites based on aluminum fluoride(AlF_(3))in an artificial SEI is disclosed in Li-S batteries with metal-based lithiophilic *** polyester polymer(PMMA and PPC)/AlF_(3) artificial SEI(MPAF-SEI)was homogeneously anchored on Li anode by in-situ *** conversion of AlF_(3) into Li-Al and LiF lithiophilic sites effectively reduce the Li nucleation overpotential and prevents the formation of Li *** the same time,the polymer can anchor LiPSs by chemical bonds and prevents Li *** optimized MPAF-SEI protected Li demonstrates excellent stability for over 3000 h at a capacity of 1 mAh cm^(-2) in Li||Li symmetric *** Li-S battery with low N/P(4)exhibits a capacity of 532.6 mAh g^(-1) over 300 cycles lifespan at 0.5 C.

关键词： Li anode SEI Lithiophilic sites Li-S battery AlF_(3)

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Biliary stents for active materials and surface modification:Recent advances and future perspectives

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Bioactive Materials 2024年第12期42卷 587-612页

作者： Yuechuan Li Kunshan Yuan Chengchen Deng Hui Tang Jinxuan Wang Xiaozhen Dai Bing Zhang Ziru Sun Guiying Ren Haijun Zhang Guixue Wang Key Laboratory for Biorheological Science and Technology of Ministry of Education National Local Joint Engineering Laboratory for Vascular ImplantsBioengineering College of Chongqing UniversityChongqing400044China Shanghai Tenth People’s Hospital School of MedicineTongji UniversityShanghai200092China National United Engineering Laboratory for Biomedical Material Modification Dezhou251100China School of Biosciences and Technology Chengdu Medical CollegeChengdu610500China Nanjing Key Laboratory for Cardiovascular Information and Health Engineering Medicine(CVIHEM) Drum Tower HospitalNanjing UniversityNanjingChina College of materials science and engineering Shandong University of TechnologyZibo25500ShandongChina

Demand for biliary stents has expanded with the increasing incidence of biliary *** implantation of plastic or self-expandable metal stents can be an effective treatment for biliary ***,these stents are nondegradable and prone to *** removal or replacement of the nondegradable stents is necessary in cases of disease resolution or *** overcome these shortcomings,improvements were made to the materials and surfaces used for the ***,this paper reviews the advantages and limitations of nondegradable ***,emphasis is placed on biodegradable polymer and biodegradable metal stents,along with functional *** also encompasses tissue engineering&3D-printed stents were ***,the future perspectives of biliary stents,including pro-epithelialization coatings,multifunctional coated stents,biodegradable shape memory stents,and 4D bioprinting,were discussed.

关键词： Biliary stent Biodegradable Functional coatings Tissue engineering&3D-printed stent Shape memory

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Current Progress and Future Perspectives of Electrolytes for Rechargeable Aluminum-Ion Batteries

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Energy & Environmental Materials 2023年第1期6卷 25-42页

作者： Dongwei Ma Du Yuan Carlos Ponce de Leon Zheng Jiang Xin Xia Jiahong Pan MOE Key Laboratory of Resources and Environmental Systems Optimization College of Environmental Science and EngineeringNorth China Electric Power UniversityBeijing 102206China College of Materials Science and Engineering Changsha University of Science and TechnologyChangsha 410004China Electrochemical Engineering Department of Engineering and Physical SciencesUniversity of SouthamptonSouthampton UK Beijing Key Laboratory of Novel Thin Film Solar Cells North China Electric Power UniversityBeijing 102206China

Aluminum-ion batteries(AIBs)with Al metal anode are attracting increasing research interest on account of their high safety,low cost,large volumetric energy density(≈8046 mA h cm−3),and environmental ***,the reversible Al electrostripping/deposition is achieved with the rapid development of room temperature ionic liquids,and rapid progress has been made in fabricating high-performance and durable AIBs during the past *** review provides an integrated comprehension of the evolution of AIBs and highlights the development of various non-aqueous and aqueous electrolytes including high-temperature molten salts,room temperature ionic liquids,and gel–polymer *** critical issues on the interplay of electrolytes are outlined in terms of the voltage window span,the effective ion species during charge storage(Al 3+or Al x Cl?y)and their underlying charge transfer(e.g.,interfacial transfer and diffusion),and the solid electrolyte interface formation and its *** the critical insight,future perspectives on how to practically design feasible AIBs are given.

关键词： aluminum-ion batteries electrochemical energy storage electrolytes ionic liquids solid electrolyte interface

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Coumarin derivative dye sensitized NaYGdF4:Yb,Er nanoparticles with enhanced NIR Ⅱ luminescence for bio-vascular imaging

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Journal of Rare Earths 2023年第12期41卷 1843-1849,I0001页

作者： Yaqun Ma Zhan Wang Yanxing Wang Zhenghao Liu Yukun Wang Ruichan Lv Xi'an Key Laboratory of Intelligent Sensing and Regulation of Trans-Scale Life Information Engineering Research Center of Molecular and Neuro ImagingMinistry of EducationSchool of Life Science and TechnologyXidian UniversityXi'an710071China

Lanthanide-doped biocompatible nanoparticles have promising applications in near-infrared second region imaging due to their high chemical stability,enhanced photostability and sharp emission ***,the weak light absorption capacity limits the application of rare-earth nanoparticles(RENPs) for *** prepared a coumarin-derived dye sensitized NaYGdF4:Yb,Er nanoparticle probe,in which the organic dye enhances photon absorption through the sensitization process,improving the luminescence efficiency of the rare earth particles near 1000 and 1500 *** addition,good water solubility and stability of the probe are imparted by coating the particles with amphiphilic polymers distearoyl phosphatidylethanolamine-polyethylene glycol(DSPE-PEG) and polyacrylic *** composite probe with good biocompatibility and NIR Ⅱ luminescence properties can be used for vascular imaging,providing a tool for the detection of hematologic-related diseases.

关键词： Rare earth doped nanoparticles Dye sensitization NIR imaging Angiography

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Thermally induced in situ fabrication of TiO_(2)/CN heterojunction dopant for enhancement of hydrogen storage properties of LiAlH_(4)

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Journal of Materials science & technology 2024年第36期203卷 227-236页

作者： Guorong Zhang Jiaxi Liu Sheng Wei Fen Xu Lixian Sun Yongpeng Xia Hehui Wang Jinfan Wu Yuan Gao Qiwei Shao Yiting Bu Yanxun Guan Lumin Liao Taigen Liang Lina Qin Guangxi Key Laboratory of Information Materials&Guangxi Collaborative Innovation Center for Structure and Properties for New Energy and Materials School of Material Science and EngineeringGuilin University of Electronic TechnologyGuilin 541004China Institute of Technology for Carbon Neutrality Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China

Herein,a novel TiO_(2)/CN heterojunction material has been prepared by one-step bubble template-assisted calcination to enhance the hydrogen storage capability of LiAlH_(4).The TEM,XPS and UPS analysis confirm that a heterostructure is formed between TiO_(2)and g-C3 N4 *** experimental findings indi-cate that the TiO_(2)/CN significantly enhances the dehydrogenation performance of LiAlH_(4).For instance,the LiAlH_(4)-7 wt%TiO_(2)/CN starts to dehydrogenize at 76℃(94℃ less than pure LiAlH_(4))and releases 6.5 wt%H2 at 200℃.Meanwhile,LiAlH_(4)-7 wt%TiO_(2)/CN releases 4.9 wt%H2 at 120℃ within 50 *** mech-anism analysis illustrates that AlTi3 N is formed in situ during *** density functional theory(DFT)calculation results reveal that the AlTi3 N can weaken the Al-H bonds in LiAlH_(4)through interfacial charge ***,the TiO_(2)/CN heterostructure creates an internal electric field that generates an electron-rich *** a result,the negative electron layer at one end of the TiO_(2)/CN heterojunction has an increased affinity for H,which enhances the dehydrogenation reaction of LiAlH_(4).Clearly,both the TiO_(2)/CN heterostructure and AlTi3 N contribute to the improvement of the dehydrogenation properties of LiAlH_(4).

关键词： Hydrogen storage material LiAlH_(4) TiO_(2) Carbon nitride Heterojunction

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Physical layer key distribution based on evolution of the single eigenmode polarization via transformation of representation in 50 km SSMF optical transmission

Physical layer key distribution based on evolution of the si...

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2024 Asia Communications and Photonics Conference, ACP 2024 and International Conference on information Photonics and Optical Communications, IPOC 2024

作者： Liu, Le Yang, Ziyun Tang, Xianfeng Zhang, Xiaoguang Zhang, Xia State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications Beijing China Shandong Provincial Key Laboratory of Optical Communications Science and Technology School of Physics Science and Information Engineering Liaocheng University Shandong China

This paper proposed and verified a minimalist-structured physical-layer key distribution scheme based on the evolution of the single eigenmode polarization via transformation of representation. A 50 km SSMF transmissi... 详细信息

ISBN: (纸本)9798350379266

关键词： Optical depth

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Feature selection of BOF steelmaking process data by using an improved grey wolf optimizer

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Journal of Iron and Steel Research International 2022年第8期29卷 1205-1223页

作者： Zong-xin Chen Hui Liu Long Qi Faculty of Information Engineering and Automation Kunming University of Science and TechnologyKunming 650500YunnanChina Yunnan Key Laboratory of Artificial Intelligence Kunming University of Science and TechnologyKunming 650500YunnanChina

Basic oxygen furnace(BOF)steelmaking end-point control using soft measurement models has essential value for economy and ***,the high-dimensional and redundant data of the BOF collected by the sensors will hinder the performance of *** traditional feature selection results based on meta-heuristic algorithms cannot meet the stability of actual industrial *** order to eliminate the negative impact of feature selection application in the BOF steelmaking,an improved grey wolf optimizer(IGWO)for feature selection was proposed,and it was applied to the BOF data ***,the proposed algorithm preset the size of the feature subset based on the new encoding scheme,rather than the traditional uncertain number ***,opposition-based learning was used to initialize the grey wolf population so that the initial population was closer to the potential optimal *** addition,a novel population update method retained the features closely related to the best three grey wolves and probabilistically updated irrelevant features through measurement or random *** methods were used to search feature subsets to maximize search capability and stability of algorithm on BOF steelmaking ***,the proposed algorithm was compared with other feature selection algorithms on the BOF data *** results show that the proposed IGWO can stably select the feature subsets that are conductive to the end-point regression accuracy control of BOF temperature and carbon content,which can improve the performance of the BOF steelmaking.

关键词： Basic oxygen furnace Feature selection Grey wolf optimization Regression Opposition-based learning

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information Freshness in Coordinate Decision-Making Communication systems

Information Freshness in Coordinate Decision-Making Communic...

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2024 IEEE Global Communications Conference, GLOBECOM 2024

作者： Zhou, Siyuan Wang, Ziqing Dong, Yunquan Tang, Bin Tan, Guoping Hohai University Key Laboratory of Water Big Data Technology of Ministry of Water Resources Nanjing China Hohai University College of Information Science and Engineering Nanjing China Nanjing University of Information Science and Technology School of Electronic and Information Engineering Nanjing China

ISBN: (纸本)9798350351255

The promptness of decision-making is of paramount importance in coordinate decision-making communication systems. In this paper, we envision a system in which a sender transmits information to a receiver for decision-making. The decision-making process encompasses the extraction of decision-related information followed by subsequent computation. To assess the impact of communication delays, randomness of decision-making and computational time on the immediacy of decisions, we introduce a novel performance metric, namely the age of decision (AoD). Specifically, AoD is defined as the time elapsed since the generation of the update upon which the most recent decision is based. Considering the stochastic nature of decision-making, we analyze the average peak AoD in systems where the arrival and service processes follow general processes or Poisson processes. To facilitate our derivations, we introduce the concept of effective decisions to denote those decisions that can lead to the system's peak AoD. Simulation results confirm the validity of our derivations and illustrate that appropriately increasing the rate of decision-making can significantly reduce the system's average peak AoD. © 2024 IEEE.

关键词： Stochastic systems

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Research on Resource Allocation Method of Unmanned Aerial Vehicle Ad Hoc Network Based on Deep Reinforcement Learning 9

Research on Resource Allocation Method of Unmanned Aerial Ve...

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9th International Conference on Intelligent Computing and Signal Processing, ICSP 2024

作者： Zhang, Tao Wang, Zijia Wang, Yupeng Jiang, Zhao School of Information Science and Engineering Southeast University Nanjing China Aviation Key Laboratory of Science and Technology on Electromagnetic Environmental Effects National Key Laboratory of Electromagnetic Information Control and Effects Shenyang China College of Electronic and Information Engineering Shenyang Aerospace University Liaoning Province Shenyang City China

ISBN: (纸本)9798350376548

With the rapid and continuous development of Unmanned Aerial Vehicle(UAV) and communication technology, UAV cluster have become a preferred solution for long-distance mission execution. Additionally, Unmanned Aerial Vehicles(UAVs) are no longer confined to individual or single-task combat operations. Instead, UAVs are coordinated to form an Ad Hoc network to accomplish multiple mission objectives. As the number of missions and electronic communication devices increases, the complexity of spectrum resource allocation becomes more and more complex. In order to address the spectrum allocation challenges faced by multiple onboard systems within the UAV Ad Hoc network during mobility flights, this paper proposes an implicit spectrum resource allocation algorithm based on deep reinforcement learning, where the ground station and UAVs are viewed as intelligent agents in the deep reinforcement learning, addressing communication issues among different onboard systems. By leveraging the past experience through Q-learning and utilizing deep learning to train the spectrum allocation strategies, the proposed algorithm aims to achieve a better system performance. Simulation results demonstrate that the proposed spectrum resource allocation algorithm based on deep reinforcement learning can reasonably allocate spectrum resources according to various onboard systems and communication environment with benefits on system data rate. © 2024 IEEE.

关键词： Antennas

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