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An ultra thin,bright,and sensitive interactive tactile display based on organic mechanoluminescence for dual-mode handwriting identification

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InfoMat 2024年第6期6卷 76-87页

作者： Tingting Hou Wenlang Li Haoyu Wang Yuantian Zheng Chaojie Chen Haoran Zhang Kai Chen Huilin Xie Xin Li Shaoshuai He Siwei Zhang Dengfeng Peng Cheng Yang Jacky W.Y.Lam Ben Zhong Tang Yunlong Zi Department of Mechanical and Automation Engineering The Chinese University of Hong KongHong Kongthe People's Republic of China Department of Chemistry Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction and Institute for Advanced StudyThe Hong Kong University of Science and TechnologyHong Kongthe People's Republic of China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhenthe People's Republic of China Thrust of Sustainable Energy and Environment The Hong Kong University of Science and Technology(Guangzhou)Guangzhouthe People's Republic of China The Hong Kong University of Science and Technology Interdisciplinary Program Office Hong Kong SARthe People's Republic of China Institute of Materials Research Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhenthe People's Republic of China School of Science and Engineering Shenzhen Institute of Aggregate Science and TechnologyThe Chinese University of Hong KongShenzhenthe People's Republic of China HKUST Shenzhen-Hong Kong Collaborative Innovation Research Institute Shenzhenthe People's Republic of China Guangzhou HKUST Fok Ying Tung Research Institute Guangzhouthe People's Republic of China

Visible light-based human–machine interactive media is capable of transmitting electrical readouts to machines and providing intuitive feedback to users ***,many inorganic mechanoluminescent(ML)materials-based interactive media,typically ZnS-loaded phosphors(ZLPs),have been successfully ***,organic ML materials-based solutions were rarely exploited despite their huge merits of strong structural modification,abundant luminescence property,low cost,easy preparation,and so ***,we propose a novel interactive tactile display(ITD)based on organic ML materials(Cz-A6-dye)and triboelectric nanogenerator,with ultra-brightness(130%enhancement)and ultra-low threshold pressure(57%reduction)as compared to *** proposed ITD achieves the conversion of weak mechanical stimuli into visible light and electrical signals simultaneously,without extra power ***,the relationship between the luminous performance of organic ML materials and mechanical force is quantified,benefiting from the uniform ML layer *** by convolutional neural networks,the high-accuracy recognition(97.1%)for handwriting and identity of users is realized at the same ***,the ITD has great potential for intelligent wearable electronics and classified military applications.

关键词： interactive media organic mechanoluminescence triboelectric nanogenerators

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The Journey/DAO/TAO of Embodied Intelligence: From Large Models to Foundation Intelligence and Parallel Intelligence

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IEEE/CAA Journal of Automatica Sinica 2024年第6期11卷 1313-1316页

作者： Tianyu Shen Jinlin Sun Shihan Kong Yutong Wang Juanjuan Li Xuan Li Fei-Yue Wang College of Information Science and Technology Beijing University of Chemical TechnologyBeijing 100029China School of Electrical and Information Engineering Jiangsu UniversityZhenjiang 212013China State Key Laboratory for Turbulence and Complex Systems Department of Advanced Manufacturing and RoboticsCollege of EngineeringPeking UniversityBeijing 100871China State Key Laboratory of Multimodal Artificial Intelligence Systems Institute of AutomationChinese Academy of SciencesBeijing 100190China Peng Cheng Laboratory Shenzhen 518000China State Key Laboratory for Management and Control of Complex Systems Chinese Academy of SciencesBeijing 100190 Faculty of Innovation Engineering Macao University of Science and TechnologyMacao 999078China IEEE

THE tremendous impact of large models represented by ChatGPT[1]-[3]makes it necessary to con-sider the practical applications of such models[4].However,for an artificial intelligence(AI)to truly evolve,it needs to possess a physical“body”to transition from the virtual world to the real world and evolve through interaction with the real *** this context,“embodied intelligence”has sparked a new wave of research and technology,leading AI beyond the digital realm into a new paradigm that can actively act and perceive in a physical environment through tangible entities such as robots and automated devices[5].

关键词： Intelligence DAO TAO

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Flow and thermal modeling of liquid metal in expanded microchannel heat sink

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Frontiers in Energy 2023年第6期17卷 796-810页

作者： Mingkuan ZHANG Xudong ZHANG Luna GUO Xuan LI Wei RAO Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control School of Mechanical EngineeringTianjin University of TechnologyTianjin 300384China National Demonstration Center for Experimental Mechanical and Electrical Engineering Education Tianjin University of TechnologyTianjin 300384China Key Laboratory for Thermal Science and Power Engineering of the Ministry of Education Department of Engineering MechanicsTsinghua UniversityBeijing 100084China School of Mechanical Engineering Tianjin University of CommerceTianjin 300134China Institute of Refrigeration and Cryogenics Shanghai Jiao Tong UniversityShanghai 200240China Beijing Key Laboratory of CryoBiomedical Engineering and Key Laboratory of Cryogenics Beijing 100190China

Liquid metal-based microchannel heat sinks (MCHSs) suffer from the low heat capacity of coolant, resulting in an excessive temperature rise of coolant and heat sink when dealing with high-power heat dissipation. In this paper, it was found that expanded space at the top of fins could distribute the heat inside microchannels, reducing the temperature rise of coolant and heat sink. The orthogonal experiments revealed that expanding the top space of channels yielded similar temperature reductions to changing the channel width. The flow and thermal modeling of expanded microchannel heat sink (E-MCHS) were analyzed by both using the 3-dimensional (3D) numerical simulation and the 1-dimensional (1D) thermal resistance model. The fin efficiency of E-MCHS was derived to improve the accuracy of the 1D thermal resistance model. The heat conduction of liquid metal in Z direction and the heat convection between the top surface of fins and the liquid metal could reduce the total thermal resistance (Rt). The above process was effective for microchannels with low channel aspect ratio, low mean velocity (Um) or long heat sink length. The maximum thermal resistance reduction in the example of this paper reached 36.0%. The expanded space endowed the heat sink with lower pressure, which might further reduce the pumping power (P). This rule was feasible both when fins were truncated (h_(2) < 0, h_(2) is the height of expanded channel for E-MCHS) and when over plate was raised (h_(2) > 0).

关键词： liquid metal cooling heat sink expanded microchannel flow and thermal modeling

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Suppressing defocus noise with U-net in optical scanning holography

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Chinese Optics Letters 2023年第8期21卷 29-37页

作者：欧海燕吴勇朱坤林彦民王秉中 School of Physics University of Electronic Science and Technology of ChinaChengdu 610054China Shenzhen Institute for Advanced Study University of Electronic Science and Technology of ChinaShenzhen 518000China Department of Electronic and Information Engineering The Hong Kong Polytechnic UniversityHong KongChina Department of Electrical and Electronic Engineering The University of Hong KongHong KongChina

Optical scanning holography(OSH)records both the amplitude and phase information of a 3D object by a 2D *** reconstruct a 3D volumetric image from an OSH hologram is difficult,as it suffers from the defocus noise from the other *** use of a random phase pupil can convert defocus noise into speckle-like noise,which may require further processing in sectional image *** this paper,we propose a U-shaped neural network to reduce this speckle *** results show that the proposed method works effectively and efficiently both in simple and complex graphics.

关键词： digital holography image reconstruction defocus noise neural network

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Hierarchical Self-assembly of Atomically Precise Au Nanoclusters with Molecular Rotor-based Ligands

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Chemical Research in Chinese Universities 2024年第4期40卷 670-674页

作者： WANG Guanzhong LU Hui LI Jiang WANG Lihua ZHU Ying SONG Shiping GE Zhilei LI Qian CHEN Jing FAN Chunhai Division of Physical Biology Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai201800P.R.China University of Chinese Academy of Sciences Beijing100049P.R.China Zhangjiang Laboratory Shanghai201210P.R.China Institute of Materiobiology Department of ChemistryCollege of SciencesShanghai UniversityShanghai200444P.R.China School of Chemistry and Chemical Engineering New Cornerstone Science LaboratoryFrontiers Science Center for Transformative MoleculesZhangjiang Institute for Advanced Study and National Center for Translational MedicineShanghai Jiao Tong UniversityShanghai200240P.R.China

The hierarchical assemblies of precise nanoparticles(NPs)have created materials with emergent properties and ***,the complex assemblies remain unclear at a precise ***,we show the hierarchical self-assembly of atomically precise gold nanoclusters(Au NCs)with molecular rotor-based ligands(MRL),featuring a double-layer *** to two other types of monolayer-protected(MLP)Au NCs,the significantly reduced surface density for MRL Au NCs profoundly influences their assembly behavior within the ***,the long length of rotor-based ligands and the rotational freedom of the phenyl-rings of rotor-based ligands also facilitate the assembly of *** works elucidate the hierarchical assembly on a precise scale,suggesting that the rotor-based ligand’s strategy offers promising potential for designing well-defined and more complex structures in supercrystals.

关键词： Gold nanocluster Molecular rotor Hierarchical assembly Double-layer surface

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Geometrical nonlinear Hall effect induced by Lorentz force

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Physical Review B 2024年第11期110卷 115123页

作者： Junjie Yao Yizhou Liu Wenhui Duan State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics School of Physics Science and Engineering Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology Beijing 100084 China Institute for Advanced Study

The recently discovered nonlinear Hall (NLH) effect arises either without external magnetic field (type-I) or with an in-plane magnetic field (type-II). In this work we propose a new type of geometrical nonlinear Hall effect with an out-of-plane magnetic field (type-III) induced by the combination of Lorentz force and anomalous electronic velocity. The type-III NLH effect is proportional to the more refined structures of Bloch wave functions, i.e., the dipole moment of square of Berry curvature, thus becoming prominent near the band crossings or anticrossings. Our effective model analysis and first-principles calculations show that gate-tuned MnBi2Te4 thin film under uniaxial strain is an ideal platform to observe this effect. Especially, giant unidirectional magnetoresistance can occur in this material, based on which an efficient electrical transistor device prototype can be built. Finally, a symmetry analysis indicates that type-III NLH effect has unique symmetry properties stemming from Berry curvature square dipole, which is different from other previously reported NLH effects and can exist in a wider class of magnetic crystals. Our study offers paradigms for nonlinear electronics.

关键词： Electrical conductivity Hall effect Quantum transport Topological materials First-principles calculations

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Frequency Domain Separation of DAS Multi-Source Aliased Signals

Frequency Domain Separation of DAS Multi-Source Aliased Sign...

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2023 Asia Communications and Photonics Conference/2023 International Photonics and Optoelectronics Meetings, ACP/POEM 2023

作者： Gu, Huaxin Liu, Shuaiqi Yu, Feihong Xu, Deyu Chen, Xingwei Shao, Liyang Wu, Yu Zhang, Haifeng College of Innovation and Entrepreneurship Southern University of Science and Technology Shenzhen China Southern University of Science and Technology Department of Electrical and Electronic Engineering Shenzhen China School of Information and Communication Engineering University of Electronic Science and Technology Chengdu China Research Institute of Tsinghua University Advanced Measurement and Control and Equipment R&d Center Chengdu China

ISBN: (纸本)9798350312614

In this paper, fast independent vector analysis (FastIVA) based on convolutional aliasing model is proposed to separate the aliased signals collected by distributed acoustic sensing (DAS) system, and the time-frequency entropy is used to judge the separation performance. The results show that the time-frequency entropy interval of the separated signals and the source signals correspond to each other, which means that the aliased signals are separated. This method is used to improve the accuracy of DAS system signal detection and recognition in complex real environment, and reduce the number of false alarm events. © 2023 IEEE.

关键词： convolutional aliasing model DAS FastIVA time-frequency entropy

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Benthic bioturbations weaken the stability of blue carbon storage

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National science Open 2025年第2期4卷 205-218页

作者： Yingrong Huang Peng Zhang He-Bo Peng Feng Pan Yan Liu Kai Wang Yu Cai Jianyu Wang Zhenyan Wang Chunmiao Zheng Hailong Li Ding He Junjian Wang Chenyuan Dang Pengbao Wu Ji Chen Damien Maher Kai Xiao School of Environmental Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds Institute of Environmental and Ecological EngineeringGuangdong University of TechnologyGuangzhou 510006China Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems Fujian Key Laboratory of Coastal Pollution Prevention and ControlCollege of the Environment&EcologyXiamen UniversityXiamen 361102China Department of Ocean Science and Engineering Southern University of Science and TechnologyShenzhen 318055China Center for Turbulence Research Stanford UniversityStanfordCA 94305USA Eastern Institute for Advanced Study Eastern Institute of TechnologyNingbo 315200China Department of Ocean Science and Center for Ocean Research in Hong Kong and MacaoThe Hong Kong University of Science and TechnologyHong Kong 999077China Hubei Key Laboratory of Multi-Media Pollution Cooperative Control in Yangtze Basin School of Environmental Science&EngineeringHuazhong University of Science and TechnologyWuhan 430074China School of Geography and Tourism Huizhou UniversityHuizhou 516007China State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of SciencesXi’an 710061China Faculty of Science and Engineering Southern Cross UniversityLismoreNew South Wales 2480Australia CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation Yantai Institute of Coastal Zone ResearchChinese Academy of SciencesYantai 264003China

Coastal ecosystems are known for their ability to sequester organic carbon(OC),termed“blue carbon”.The molecular composition of dissolved organic matter(DOM)can affect sediment OC content;however,the impact of benthic bioturbation on DOM properties and OC storage stability is not well *** study examined the effects of bio-turbation by fiddler crabs on DOM molecular properties and OC storage stability along the Chinese *** findings indicate that crab bioturbation enhanced the release of labile molecules by 59%on *** increase is controlled by the coupling reactions of iron and manganese minerals,and is influenced by climatic ***,fiddler crab bioturbation diminishes the durability of blue carbon storage,with the most significant effects observed in mangrove forests,followed by bare mudflats,tidal creek banks,and *** results underscore the critical role of benthic bioturbation in global blue carbon budgets.

关键词： blue carbon crab bioturbation Fe and Mn minerals climate change molecular level continental scale

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Distributed No-Regret Learning for Stochastic Aggregative Games over Networks

Distributed No-Regret Learning for Stochastic Aggregative Ga...

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第41届中国控制会议

作者： Jinlong Lei Peng Yi Li Li Department of Control Science and Engineering Tongji University Institute for Advanced Study Tongji University Shanghai Research Institute for Intelligent Autonomous Systems

In this work,we propose a distributed no-regret learning for stochastic aggregative games over time-varying *** consider a finite set of players repeatedly playing the network aggregative game in stochastic regimes,where each player has an expectation-valued objective function depending on its own strategy and the aggregate of all player strategies,and the players can estimate gradients of their objective functions up to a zero-mean error with bounded *** consider the scenario in which players cannot directly obtain the aggregate value,but they are able to share their estimates of the aggregate with their neighbors without disclosing their own *** design a distributed learning algorithm based on the mirror descent and dynamical averaging *** then provide analysis for both the variational regret and the cost regret for aggregative games with player-specific problem being convex,and show that the expected regret bounds can be O(K) for specific *** analyses indicate the key correlations between the regret bounds,the network connectivity,and game structures,*** addition,we validate the almost sure convergence to the Nash equilibrium for the class of strictly monotone ***,we present preliminary numerics by applying the proposed scheme to the Nash-Cournot competition problem.

关键词： Distributed No-Regret Learning for Stochastic Aggregative Games over Networks

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Robust flocking for non-identical second-order nonlinear multi-agent systems

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Autonomous Intelligent Systems 2021年第1期1卷 81-90页

作者： Xiuxian Li Housheng Su Li Li Department of Control Science and Engineering College of Electronics and Information Engineeringand Shanghai Research Institute for Intelligent Autonomous SystemsTongji UniversityShanghai 200092China Institute for Advanced Study Tongji UniversityShanghai 200092China School of Automation Image Processing and Intelligent Control Key Laboratory of Education Ministry of ChinaHuazhong University of Science and TechnologyLuoyu Road 1037Wuhan 430074China

This paper investigates the robust flocking problem for second-order nonlinear systems with a leader and external *** contrast with most of second-order systems in the literature,the intrinsic dynamics here are nonlinear and non-identical that depend not only on the velocity but also on the position,which is more ***,the interaction topology is undirected and *** that the leader’s velocity may be constant or time-varying,two distributed flocking control laws have been proposed for two cases to make the differences of the velocities between all followers and the leader approach to zero *** proposed distributed flocking control laws are both model-independent which results in the effectiveness of the controllers to cope with the different intrinsic dynamics of the followers and the leader under some assumptions on boundedness of several *** example is given to illustrate the validity of the theoretical results.

关键词： Flocking Multi-agent systems Second-order nonlinear systems Non-identical dynamics

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