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CsPbBr_(3)quantum dots/PDVT-10 conjugated polymer hybrid film-based photonic synaptic transistors toward high-efficiency neuromorphic computing

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Science China Materials 2022年第11期65卷 3077-3086页

作者： Congyong Wang Qisheng Sun Gang Peng yujie Yan xipeng yu Enlong Li Rengjian yu Changsong Gao Xiaotao Zhang Shuming Duan Huipeng Chen Jishan Wu Wenping Hu Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityBinhai New CityFuzhou 350207China Department of Chemistry National University of Singapore3 Science Drive 3Singapore 117543Singapore Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of ChemistrySchool of ScienceTianjin University&Collaborative Innovation Center of Chemical Science and Engineering(Tianjin)Tianjin 300072China Institute of Optoelectronic Display National&Local United Engineering Lab of Flat Panel Display TechnologyFuzhou UniversityFuzhou 350002China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350100China School of Materials Science and Engineering Xiamen University of TechnologyXiamen 361024China

Photonic synaptic transistors are promising neuromorphic computing systems that are expected to circumvent the intrinsic limitations of von Neumann-based *** design and construction of photonic synaptic transistors with a facile fabrication process and highefficiency information processing ability are highly desired,while it remains a tremendous ***,a new approach based on spin coating of a blend of CsPbBr_(3) perovskite quantum dot(QD)and PDVT-10 conjugated polymer is reported for the fabrication of photonic synaptic *** combination of flat surface,outstanding optical absorption,and remarkable charge transporting performance contributes to high-efficiency photon-to-electron conversion for such perovskite-based ***-performance photonic synaptic transistors are thus fabricated with essential synaptic functionalities,including excitatory postsynaptic current(EPSC),paired-pulse facilitation(PPF),and long-term *** utilizing the photonic potentiation and electrical depression features,perovskite-based photonic synaptic transistors are also explored for neuromorphic computing simulations,showing high pattern recognition accuracy of up to 89.98%,which is one of the best values reported so far for synaptic transistors used in pattern *** work provides an effective and convenient pathway for fabricating perovskite-based neuromorphic systems with high pattern recognition accuracy.

关键词： CsPbBr_(3)quantum dots photonic synaptic transistor synaptic functionalities neuromorphic computing pattern recognition accuracy

胶体在地下水中的环境行为特征及其研究方法探讨

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水科学进展 2016年第4期27卷 629-638页

作者：张文静周晶晶刘丹李昊洋于喜鹏桓颖吉林大学地下水资源与环境教育部重点实验室吉林长春130021 吉林大学环境与资源学院吉林长春130021

在收集查阅国内外已有研究资料的基础上,对地下水中胶体稳定性、迁移机制以及模拟预测方法进行了详细归纳和总结。研究表明,胶体稳定性主要受自身理化性质和水文地球化学条件的影响,其受控于胶体粒径、形态、电势电位以及地下水的pH、... 详细信息

在收集查阅国内外已有研究资料的基础上,对地下水中胶体稳定性、迁移机制以及模拟预测方法进行了详细归纳和总结。研究表明,胶体稳定性主要受自身理化性质和水文地球化学条件的影响,其受控于胶体粒径、形态、电势电位以及地下水的pH、离子强度等条件。胶体在多孔介质中的迁移机制主要表现为胶体沉积和形变阻塞,其中针对胶体稳定性的差异性,胶体沉积过程分别表现为表面封阻和过滤熟化。目前有关胶体在地下水中迁移的模拟技术已发展得日益成熟,但结合多孔介质非均质性和胶体化学性质非均质性的数学模型还需进一步探讨。

关键词：胶体多孔介质胶体稳定性迁移机制模拟预测

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人工道德基础器件:模拟道德逻辑的晶体管

Science China Materials 2024年第2期67卷 608-618页

作者：陈绍敏俞礽坚邹浥于希鹏刘常飞胡袁源郭太良陈惠鹏 Institute of Optoelectronic Display National&Local United Engineering Lab of Flat Panel Display TechnologyFuzhou UniversityFuzhou 350002China Department of Information Engineering Zhicheng CollegeFuzhou UniversityFuzhou 350002China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350100China College of Semiconductors(College of Integrated Circuits) Hunan UniversityChangsha 410082China

日益先进的人工智能在生活中的广泛应用,促进了人工道德问题的产生.机器人的人工伦理的建立和实施通常是通过被动程序指令解决的,而在硬件层面的主动实现仍然具有挑战性.在这里,受认知心理学和神经生理学的启发,我们展示了一种典型的人... 详细信息

日益先进的人工智能在生活中的广泛应用,促进了人工道德问题的产生.机器人的人工伦理的建立和实施通常是通过被动程序指令解决的,而在硬件层面的主动实现仍然具有挑战性.在这里,受认知心理学和神经生理学的启发,我们展示了一种典型的人工道德器件.通过判断善恶和解决道德困境,器件实现了机器人三定律中的第一定律.器件展示了自我、本我和超我三种状态,以及绝对命令、本能漠视、本能冲动、道德义务论、功利主义和利己主义等六种人性.道德的起源在电子学方面得到了揭示,这是潜意识和意识之间的对抗性协作.这项工作为未来人工智能的意识产生和道德形成提供了一条可行的道路.

关键词： artificial morality neuromorphic device transistor three laws of robotics subconsciousness

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供水管网韧性评估方法研究

给水排水 2020年第6期46卷 141-145页

作者：詹栩怡刘书明于喜鹏肖磊吴雪清华大学环境学院北京100084 常州通用自来水有限公司常州213000

建立供水管网韧性评估方法,通过结构性变化和非结构性变化的情景分析,选择Todini指数、供水保证率、剩余供水能力、故障前后节点能量损失4个指标作为韧性指标,选取算例管网进行韧性分析。结果表明,建立管网韧性评估方法及指标,有利于评... 详细信息

建立供水管网韧性评估方法,通过结构性变化和非结构性变化的情景分析,选择Todini指数、供水保证率、剩余供水能力、故障前后节点能量损失4个指标作为韧性指标,选取算例管网进行韧性分析。结果表明,建立管网韧性评估方法及指标,有利于评估供水管网对人口增长、气候变化等风险的承载能力,有利于针对管网运行现状提出经济高效的管理策略。

关键词：供水管网韧性剩余供水能力

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~3H-黄柏,~3H-小檗碱的经皮渗透

同位素 1992年第1期5卷 36-42页

作者：金锡鹏俞小忠张年宝匡建文上海医科大学公共卫生学院同位素中心实验室上海200032 上海原子核研究所上海201800

采用放射性~3H标记黄柏提取物及主要组分小檗碱,利用离体皮肤渗透装置,进行离体皮肤渗透研究。对实验结果作数学模型分析。研究发现黄柏液和小檗碱水溶液或乙二醇溶液在0.99μg/cm^2和0.82μg/cm^2以上剂量组可经豚鼠皮肤和人皮渗透。... 详细信息

采用放射性~3H标记黄柏提取物及主要组分小檗碱,利用离体皮肤渗透装置,进行离体皮肤渗透研究。对实验结果作数学模型分析。研究发现黄柏液和小檗碱水溶液或乙二醇溶液在0.99μg/cm^2和0.82μg/cm^2以上剂量组可经豚鼠皮肤和人皮渗透。黄柏水溶液高剂量组33.50μg/cm^2经豚鼠皮肤在10h的渗透速率和渗透率分别为1.30ng/min·cm^2和2.33%.比人皮0.77ng/min·cm^2和1.38为快。小檗碱水溶液高剂量组28.64μg/cm^2在9.5h经豚鼠的渗透速率和渗透率为0.45ng/min·cm和0.89%,比经人皮0.22ng/min·cm^2和0.46%快。用乙二醇作溶剂时,可显著加快黄柏、小檗碱经豚鼠皮肤的穿透。用数学方法分析求得通透常数K_p,发现黄柏、小檗碱乙二醇溶液经豚鼠皮K_p>其相应的水溶液的K_p;黄柏、小檗碱水溶液经人皮的K_p>经豚鼠皮肤的K_p.K_P值与相应的渗透速率、渗透量相一致。黄柏和小檗碱水溶液或乙二醇溶液经人皮吸收的延搁期>经豚鼠的延搁期。

关键词：经皮渗透黄柏小檗碱氚标记

不平衡样本下基于高斯混合生成模型的泄漏检测方法

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给水排水 2021年第2期47卷 145-150页

作者：郭冠呈刘书明于喜鹏李俊禹马紫清马兴科清华大学环境学院北京100084

我国供水管网漏损问题严重,由于管线泄漏随机性大,难以有效捕捉泄漏信号。因此,检测数据中的正常样本远远多于泄漏样本,存在样本不平衡问题,导致有监督泄漏检测模型的分类效果不佳,从而难以准确识别泄漏事件。针对此问题,提出一种基于... 详细信息

我国供水管网漏损问题严重,由于管线泄漏随机性大,难以有效捕捉泄漏信号。因此,检测数据中的正常样本远远多于泄漏样本,存在样本不平衡问题,导致有监督泄漏检测模型的分类效果不佳,从而难以准确识别泄漏事件。针对此问题,提出一种基于高斯混合生成模型的泄漏检测方法,采用高斯混合模型生成新的泄漏样本,使样本比例平衡后再训练模型进行检测。通过和随机过采样、少数合成过采样、自适应合成过采样3种传统方法进行对比,结果表明本文提出的泄漏检测方法准确率高于0.946,灵敏性高于0.917,总体效果明显优于其他方法,为解决实际泄漏检测中样本不平衡问题提供了指导。

关键词：供水管网声学泄漏检测不平衡分类高斯混合生成模型

Thermally responsive ionic transport system reinforced by aligned functional carbon nanotubes backbone

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Chinese Chemical Letters 2023年第7期34卷 439-443页

作者： Lejian yu Miao Wang xipeng Li Xu Hou State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China The Higher Educational Key Laboratory for Biomedical Engineering of Fujian Province Research Center of Biomedical Engineering of XiamenDepartment of BiomaterialsCollege of MaterialsXiamen UniversityXiamen 361005China Research Institute for Biomimetics and Soft Matter Fujian Provincial Key Laboratory for Soft Functional Materials ResearchJiujiang Research InstituteCollege of Physical Science and TechnologyXiamen UniversityXiamen 361005China Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) Xiamen 361005China

Ion transport plays an important role in energy conversion, biosensors, and a variety of biological processes. Carbon nanotubes, especially for the carbon nanotubes arrays with controlled vertically aligned structures, have displayed great potential as a promising material for regulating ion transport behaviors in the applications of the nanofluidic devices and osmotic energy conversion. Herein, we demonstrate the thermo-controlled ion transport system through the vertically aligned multiwall carbon nanotubes arrays membrane modified by the thermo-responsive hydrogel in a simple and reliable way. The functional carbon nanotubes backbone with the inherent surface charge and interstitial channels structure renders the system improved ion transport behaviors and well controlled switching property by thermo. Based on the integrated properties, the energy output from osmotic power in this system could be regulated by the reversible temperature switches. Moreover, it can realize a higher osmotic energy conversion property regulated by the thermos, which may extend the practical application in the future. The system that combines intelligent response with controlled ion transport behaviors and potential osmotic energy utilizations presents a valuable paradigm for the use of carbon nanotubes and hydrogel composite materials and provides a promising way for applications of nanofluidic devices.

关键词： Carbon nanotubes arrays Ion transport system Interstitial channels Thermo-controlled Osmotic energy

Bioinspired nanofluidic iontronics for brain-like computing

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Nano Research 2024年第2期17卷 503-514页

作者： Lejian yu xipeng Li Chunyi Luo Zhenkang Lei Yilan Wang Yaqi Hou Miao Wang Xu Hou State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Institute of Artificial Intelligence Xiamen UniversityXiamen 361005China Department of Physics Research Institute for Biomimetics and Soft MatterFujian Provincial Key Laboratory for Soft Functional Materials ResearchJiujiang Research InstituteCollege of Physical Science and TechnologyXiamen UniversityXiamen 361005China The Higher Educational Key Laboratory for Biomedical Engineering of Fujian Province Department of BiomaterialsResearch Center of Biomedical Engineering of XiamenCollege of MaterialsXiamen UniversityXiamen 361005China The Institute of Flexible Electronics(IFE Future Technologies)Xiamen UniversityXiamen 361005China Binzhou Institute of Technology Binzhou 256600China Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) Xiamen 361102China Engineering Research Center of Electrochemical Technologies of Ministry of Education Xiamen UniversityXiamen 361005China

The human brain performs computations via a highly interconnected network of *** inspiration from the information delivery and processing mechanism of the human brain in central nervous systems,bioinspired nanofluidic iontronics has been proposed and gradually engineered to overcome the limitations of the conventional electron-based von Neumann architecture,which shows the promising potential to enable efficient brain-like *** and tunable nanofluidic ion transport behaviors and spatial confinement show promising controllability of charge carriers,and a wide range of structural and chemical modification paves new ways for realizing brain-like ***,a comprehensive framework of mechanisms and design strategy is summarized to enable the rational design of nanofluidic systems and facilitate the further development of bioinspired nanofluidic *** review provides recent advances and prospects of the bioinspired nanofluidic iontronics,including ion-based brain computing,comprehension of intrinsic mechanisms,design of artificial nanochannels,and the latest artificial neuromorphic functions ***,the challenges and opportunities of bioinspired nanofluidic iontronics in the pioneering and interdisciplinary research fields are proposed,including brain–computer interfaces and artificial neurons.

关键词： human brain ion transport nanofluidics brain-like computing memristive effect

COATS:Comprehensive observation on the atmospheric boundary layer three-dimensional structure during haze pollution in the North China Plain

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Science China Earth Sciences 2023年第5期66卷 939-958页

作者： Qianhui LI Hongsheng ZHANG Xiaoye ZHANG Xuhui CAI xipeng JIN Lu ZHANG yu SONG Ling KANG Fei HU Tong ZHU Tianjin Key Laboratory for Oceanic Meteorology Tianjin Meteorological Service CenterTianjin Meteorological BureauTianjin 300074China Laboratory for Climate and Ocean-Atmosphere Studies Department of Atmospheric and Oceanic SciencesSchool of PhysicsPeking UniversityBeijing 100871China State Key Laboratory of Severe Weather and Key Laboratory of Atmospheric Chemistry of CMA Chinese Academy of Meteorological SciencesChina Meteorological Administration(CMA)Beijing 100081China State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China

The North China Plain(NCP)is troubled by severe haze pollution and the evolution of haze pollution is closely related to the atmospheric boundary layer(ABL).However,experimental and theoretical studies on the physical-chemical processes of the ABL in the NCP are lacking,with many scientific problems to be *** solve these problems,the Comprehensive Observation on the Atmospheric boundary layer Three-dimensional Structure(COATS)during haze pollution was carried out in the NCP from 2016 to *** COATS experiment adopted a"point-line-surface"spatial layout,obtaining both spatial-temporal profiles of the meteorological and environmental elements in the ABL and the turbulent transport data of fine particulate matter(PM_(2.5))in winter and *** research achievements are as *** spatial-temporal distribution characteristics of the ABL structure and PM_(2.5)concentrations in NCP were *** typical thermal structure of persistent heavy haze events and the pollutant removal mechanism by low-level jets were *** was determined that the spatial structure of the ABL adjusted by the Taihang Mountains is responsible for the heterogeneous distribution of haze pollution in the NCP,and that mountain-induced vertical circulations can promote the formation of elevated pollution *** restraints of the atmospheric internal boundaries on horizontal diffusion of pollutants were *** contribution of the ABL to haze pollution in winter and summer was qualitatively compared and quantitatively *** turbulent transport nature behind the relationship between the atmospheric boundary layer height(ABLH)and surface PM_(2.5)concentrations was *** concept of"aerosol accumulation layer"was defined,and the applicability of the material method in determining ABLH was clarified.A measurement system for obtaining the turbulent flux of PM_(2.5)concentrations was developed,and the turbulence characteristics of PM_(2.5)concentrations w

关键词： COATS experiment Haze pollution ABL three-dimensional structure Aerosol accumulation layer Turbulent flux of PM_(2.5)concentrations North China Plain