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ZnO-ITO/WO_(3-x)heterojunction structured memristor for optoelectronic co-modulation neuromorphic computation

Science China Materials 2024年第9期67卷 2838-2847页

作者： Jianyong Pan Tong Wu Wenhao Yang Yang Li Jiaqi Zhang hao kan Shandong Provincial Key Laboratory of Network Based Intelligent Computing School of Information Science and EngineeringUniversity of JinanJinan250022China School of Integrated Circuits Shandong UniversityJinan250101China Key Laboratory of Automobile Materials Ministry of Education College of Materials Science and EngineeringJilin UniversityChangchun130012China

Traditional transistors confront severe challenges of insufficient computing capability and excessive power consumption in large-scale neuromorphic *** address these critical bottlenecks,we propose an optoelectronic memristor based on zinc oxide-indium tin oxide/tungsten oxide(ZnO-ITO/WO_(3-x))heterojunctions as a promising *** applying different types of electrical and optical signals,the device successfully emulates diverse synaptic functions including short-term/long-term synaptic plasticity,alongside short-term and long-term *** the ZnO-ITO functional layer enhances the photoresponse of the WO_(3-x)-based memristor and demonstrates“learning-forgetting-relearning”behavior under optical ***,based on the photoelectric cooperative memristor array,a convolutional neural network for vehicle type recognition is constructed,which solves the problem of zero weight and negative weight *** regard to energy efficiency,the neural network built with this device operates at a power level of only 10^(-3)W,representing a reduction of more than 4 orders of magnitude compared with a standard central ***,the photoelectric memristor proposed in this work provides a new idea for neuromorphic computing and is expected to promote the development of energy-efficient brain-like computing.

关键词： ZnO-ITO/WO_(3-x)heterojunction optoelectronic memristor synaptic plasticity neuromorphic computing convolutional neural network

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乡村振兴战略背景下农村中药材配送问题研究——以陕西省镇坪县为例

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物流工程与管理 2024年第2期46卷 66-69页

作者：阚豪王雨甜程娟金陵科技学院江苏南京211169

新时代和乡村振兴战略背景下,物流配送在乡村经济发展中起到重要作用。考虑到中华优秀传统文化中中医文化的输出和中药材市场需求的不断扩大,文中以镇坪县中药材为研究对象,分析其作为镇坪县首位产业的配送问题。为了改善镇坪县专业人... 详细信息

新时代和乡村振兴战略背景下,物流配送在乡村经济发展中起到重要作用。考虑到中华优秀传统文化中中医文化的输出和中药材市场需求的不断扩大,文中以镇坪县中药材为研究对象,分析其作为镇坪县首位产业的配送问题。为了改善镇坪县专业人才缺乏、运输流程不完善、资源利用率低等中药材配送问题,文中运用现代物流管理、成本管理等理论知识,并结合政府政策规划对镇坪县中药材配送提出一系列建议。

关键词：中药材物流配送乡村振兴镇坪县

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乡村振兴战略背景下现代生鲜农产品配送模式分析

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全国流通经济 2024年第7期 44-47页

作者：阚豪王雨甜史桂芳程娟金陵科技学院江苏南京211169

乡村振兴战略和电子商务背景下,物流对于农村发展是非常重要的组成部分,然而我国物流业起步较晚,在物流配送设备、技术和模式上都存在许多问题。因此如何降低物流成本,提高物流水平成为当下探究的重点问题。本文立足物流配送理论知识,... 详细信息

乡村振兴战略和电子商务背景下,物流对于农村发展是非常重要的组成部分,然而我国物流业起步较晚,在物流配送设备、技术和模式上都存在许多问题。因此如何降低物流成本,提高物流水平成为当下探究的重点问题。本文立足物流配送理论知识,结合我国农村物流配送现状对农村生鲜农产品配送模式进行分析,尝试从增强物流配送技术及基础设施、物流人才培养和改善物流流程三个方面对现代生鲜农产品配送模式进行优化,最后以SWOT模型针对陕西省安康市镇坪县生鲜农产品物流配送进行实例分析,并提出一系列可行的对策建议。

关键词：生鲜农产品配送模式乡村振兴战略

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Aortic heterogeneity across segments and under high fat/salt/glucose conditions at the single-cell level

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National Science Review 2020年第5期7卷 881-896页

作者： Dongxu He Aiqin Mao Chang-Bo Zheng hao kan Ka Zhang Zhiming Zhang Lei Feng Xin Ma Wuxi School of Medicine and School of Food Science and Technology Jiangnan University School of Biotechnology Jiangnan University School of Pharmaceutical Science and Yunnan Key Laboratory of Pharmacology for Natural Products Kunming Medical University

The aorta, with ascending, arch, thoracic and abdominal segments, responds to the heartbeat, senses metabolites and distributes blood to all parts of the body. However, the heterogeneity across aortic segments and how metabolic pathologies change it are not known. Here, a total of 216 612 individual cells from the ascending aorta, aortic arch, and thoracic and abdominal segments of mouse aortas under normal conditions or with high blood glucose levels, high dietary salt, or high fat intake were profiled using single-cell RNA sequencing. We generated a compendium of 10 distinct cell types, mainly endothelial(EC), smooth muscle (SMC), stromal and immune cells. The distributions of the different cells and their intercommunication were influenced by the hemodynamic microenvironment across anatomical segments,and the spatial heterogeneity of ECs and SMCs may contribute to differential vascular dilation and constriction that were measured by wire myography. Importantly, the composition of aortic cells, their gene expression profiles and their regulatory intercellular networks broadly changed in response to high fat/salt/glucose conditions. Notably, the abdominal aorta showed the most dramatic changes in cellular composition, particularly involving ECs, fibroblasts and myeloid cells with cardiovascular risk factor-related regulons and gene expression networks. Our study elucidates the nature and range of aortic cell diversity,with implications for the treatment of metabolic pathologies.

关键词： aorta single-cell RNA sequencing cardiovascular disease

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Anti-Jahn-Teller effect induced ultrafast insulator to metal transition in perovskite BaBiO_(3)

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npj Computational Materials 2022年第1期8卷 2148-2154页

作者： Nan Feng Jian Han Changpeng Lin Zhengwei Ai Chuwen Lan Ke Bi Yuanhua Lin kan-hao Xue Ben Xu State Key Laboratory of Information Photonics and Optical Communications School of ScienceBeijing University of Posts and Telecommunications100876BeijingChina Graduate School of China Academy of Engineering Physics 100193BeijingChina State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua University100084BeijingChina Theory and Simulation of Materials(THEOS) École Polytechnique Fédérale de LausanneCH-1015LausanneSwitzerland School of Integrated Circuits School of Optical and Electronic InformationHuazhong University of Science and Technology430074WuhanChina

The Jahn-Teller(JT)effect involves the ions M with a degenerate electronic state distorting the corner-sharing MO_(6)octahedra to lift the degeneracy,inducing strong coupling of electrons to lattice,and mediating the exotic properties in perovskite ***,the anti-Jahn–Teller(AJT)effect refers to the deformation against the Jahn-Teller-distorted MO_(6)***,it is difficult to experimentally execute both effects descending from the fine-tuning of crystal *** propose the AJT can be introduced by THz laser illumination at 11.71 THz in a candidate superconducting perovskite material BaBiO_(3)near room *** illumination coherently drives the infrared-active phonon that excites the Raman breathing mode through the quadratic-linear nonlinear *** process is characterized by the emergence of an AJT effect,accompanied by an insulator-to-metal transition occurring on the picosecond *** study underlines the important role of crystal structure engineering by coherent phonon excitation in designing optoelectronic devices.

关键词： tuning effect illumination

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Threshold of climate extremes that impact vegetation productivity over the Tibetan Plateau

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Science China Earth Sciences 2024年第6期67卷 1967-1977页

作者： Zhenggang PIAO Xiangyi LI hao XU Kai WANG Shuchang TANG Fei kan Songbai HONG College of Urban and Environmental Sciences Peking UniversityBeijing 100871China

Vegetation growth is adversely impacted by multiple climate extremes related to the water and thermal stress over the Tibetan Plateau(TP).However,it remains unknown at which stress level these climate extremes can trigger the abrupt shifts of vegetation response to climate extremes and result in the maximum vegetation response across *** fill this knowledge gap,we combined the hydrometeorological data and the satellite-derived vegetation index to detect two critical thresholds that determine the response of vegetation productivity to droughts,high-temperature extremes,and low-temperature extremes,respectively,during *** results show that the response of vegetation productivity to droughts rapidly increases once crossing -1.41±0.6 standard deviation(σ)below the normal conditions of soil *** crossing-2.98σ±0.9σ,vegetation productivity is maximum damaged by ***-temperature extremes,which have the two thresholds of 1.34σ±0.4σand 2.31σ±0.4σover TP,are suggested to trigger the strong response of vegetation productivity at a milder stress level than low-temperature extremes(two thresholds:-1.44σ±0.5σand-2.53σ±0.8σ).Moreover,we found the compounded effects of soil moisture deficit in reducing the threshold values of both high-and low-temperature *** on the derived thresholds of climate extremes that impact vegetation productivity,Earth System Models project that southwestern TP and part of the northeastern TP will become the hotspots with a high exposure risk to climate extremes by *** study deciphers the high-impact extreme climates using two important thresholds across TP,which advances the understanding of the vegetation response to different climate extremes and provides a paradigm for assessing the impacts of climate extremes on regional ecosystems.

关键词： Tibetan Plateau Climate extremes Thresholds Vegetation productivity

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Finger-actuated wireless-charging wearable multifunctional sweatsensing system for levodopa and vitamin C

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Nano Research 2024年第4期17卷 3096-3106页

作者： Qihong Ning Shaoqing Feng Qingwen Sun Ruoyao Yu Tangan Li hao Xu Daxiang Cui kan Wang School of Sensing Science and Engineering School of Electronic Information and Electrical EngineeringShanghai Jiao Tong UniversityKey Laboratory of Thin Film and Microfabrication Technology(Ministry of Education)Shanghai 200240China Department of Plastic and Reconstructive Surgery Shanghai Ninth People’s HospitalShanghai Jiao Tong University School of MedicineShanghai 200011China School of Naval Architecture Ocean&Civil EngineeringShanghai Jiao Tong UniversityShanghai 200240China

Efficient portable wearable sweat sensors allow the long-term monitoring of changes in the status of biomarkers in sweat,which can be useful in diagnosis,medication,and nutritional *** this study,we designed and tested a wireless,battery-free,flexible,self-pumping sweat-sensing system that simultaneously tracks levodopa and vitamin C levels in human sweat and detects body *** system includes a microfluidic chip with a self-driven pump and anti-reflux valve,a flexible wireless circuit board,and a purpose-designed smartphone *** microfluidic chip is used for the efficient collection of sweat and the drainage of excess *** dual electrochemical sensing electrodes in the chip are modified with functional materials and appropriate enzymatic reagents,achieving excellent selectivity and *** sensitivities of the levodopa sensor and the vitamin C sensor are 0.0073 and 0.0018μA·μM^(-1),respectively,and the detection correlation coefficients of both exceed *** sensors have a wide linear detection range of 0–100 and 0–1000μM,respectively,and low detection limits of 0.28 and 17.9μM,*** flexible wireless circuit board is equipped with the functions of wireless charging,electrical signal capture and processing,and wireless *** data recorded from each sensor are displayed on a smartphone via a self-developed app.A series of experimental results confirmed the reliability of the sweat-sensing system in noninvasively monitoring important biomarkers in the human body and its potential utility in the comprehensive assessment of biological health.

关键词： self-pumping microfluidic channel wireless charging wearable sensor health monitoring

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MOF-Like 3D Graphene-Based Catalytic Membrane Fabricated by One-Step Laser Scribing for Robust Water Purification and Green Energy Production

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Nano-Micro Letters 2022年第11期14卷 48-61页

作者： Xinyu Huang Liheng Li Shuaifei Zhao Lei Tong Zheng Li Zhuiri Peng Runfeng Lin Li Zhou Chang Peng kan-hao Xue Lijuan Chen Gary J.Cheng Zhu Xiong Lei Ye School of Optical and Electronic Information and Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074People’s Republic of China Hubei Yangtze Memory Laboratories Wuhan 430205People’s Republic of China Institute for Frontier Materials Deakin UniversityGeelongVIC 3216Australia Key Laboratory of New Processing Technology for Nonferrous Metal and Materials(Ministry of Education) Guangxi Key Laboratory of Optical and Electronic Materials and DevicesCollege of Materials Science and EngineeringGuilin University of TechnologyGuilin 541004People’s Republic of China College of Chemistry and Materials Science Hunan Agricultural UniversityHunan 410128People’s Republic of China School of Material Science and Engineering Hunan University of Science and TechnologyXiangtanHunan ProvincePeople’s Republic of China School of Industrial Engineering and Birck Nanotechnology Centre Purdue UniversityWest LafayetteIN 47907USA Institute of Environmental Research at Greater Bay Key Laboratory for Water Quality and Conservation of the Pearl River DeltaMinistry of EducationGuangzhou UniversityGuangzhou 510006GuangdongPeople’s Republic of China

Increasing both clean water and green energy demands for survival and development are the grand challenges of our ***,we successfully fabricate a novel multifunctional 3D graphene-based catalytic membrane(3D-GCM)with active metal nanoparticles(AMNs)loading for simultaneously obtaining the water purification and clean energy generation,via a“green”one-step laser scribing *** as-prepared 3D-GCM shows high porosity and uniform distribution with AMNs,which exhibits high permeated fluxes(over 100 L m^(−2) h^(−1))and versatile super-adsorption capacities for the removal of tricky organic pollutants from wastewater under ultra-low pressure-driving(0.1 bar).After adsorption saturating,the AMNs in 3D-GCM actuates the advanced oxidization process to self-clean the fouled membrane via the catalysis,and restores the adsorption capacity well for the next time membrane *** importantly,the 3D-GCM with the welding of laser scribing overcomes the lateral shear force damaging during the long-term ***,the 3D-GCM could emit plentiful of hot electrons from AMNs under light irradiation,realizing the membrane catalytic hydrolysis reactions for hydrogen energy ***“green”precision manufacturing with laser scribing technology provides a feasible technology to fabricate high-efficient and robust 3D-GCM microreactor in the tricky wastewater purification and sustainable clean energy production as well.

关键词： 3D graphene Laser scribing Catalytic membrane Water purification Hydrogen production

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Point-defect-driven flattened polar phonon bands in fluorite ferroelectrics

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npj Computational Materials 2023年第1期9卷 1120-1128页

作者： Pu Ai Fengjun Yan Wen Dong Shi Liu Junlei Zhao kan-hao Xue Syed Ul Hasnain Bakhtiar Yilong Liu Qi Ma Ling Miao Mengyuan Hua Guangzu Zhang Shenglin Jiang Wei Luo Qiuyun Fu School of Integrated Circuits Engineering Research Centre for Functional Ceramics of the Ministry of Education&Wuhan National Lab for Optoelectronics&Optical Valley Laboratory Huazhong University of Science and Technology430074 WuhanChina Department of Physics School of ScienceWestlake UniversityHangzhou310024 ZhejiangChina School of Optical and Electronic Information Research Centre&Wuhan National Lab for Optoelectronics&Optical Valley Laboratory Huazhong University of Science and Technology430074 WuhanChina Department of Electrical and Electronic Engineering Southern University of Science and Technology518055 ShenzhenChina Shenzhen Huazhong University of Science and Technology Research Institute 518000 ShenzhenP.R.China

The scale-free ferroelectric polarization of fluorite MO_(2)(M=Hf,Zr)due to flat polar phonon bands are promising for nonvolatile *** are also widely introduced to improve the emergent ***,their roles are still not fully understood at the ***,we report a significant effect of point-defect-driven flattening of polar phonon bands with more polar modes and polarization contribution in doped MO_(2).The polar phonon bands in La-doped MO_(2)(M=Hf,Zr)can be significantly flattened,compared with pure ***,the lower energy barrier with larger polarization of VO-only doped MO_(2) compared with La-doped cases suggest that VO and local lattice distortion should be balanced for high-performance fluorite *** work is believed to bridge the relation between point defects and the generally enhanced induced ferroelectricity in fluorite ferroelectrics at the atomic-level and inspire their further property optimization via defect-engineering.

关键词： bands phonon ferroelectric

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Thermal stress simulation analysis of aerospace optical fibers and connectors and related extensions to high-speed railway area

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High-Speed Railway 2024年第2期2卷 122-132页

作者： Feng Zhou Siyuan Yu Zeren Gao Jie kan hao Xu Mengjie Liu The 8th Research Institute of China Electronics Technology Corporation Hefei 230051China Anhui Key Laboratory of Aerospace Optical Fiber Interconnection Technology Hefei 230051China Harbin Institute of Technology Harbin 150001China ANJIANG TEC Wuhu 241000China

Aerospace optical cables and fiber-optic connectors have numerous advantages(e.g.,low loss,wide transmission frequency band,large capacity,light weight,and excellent resistance to electromagnetic interference).They can achieve optical communication interconnections and high-speed bidirectional data transmission between optical terminals and photodetectors in space,ensuring the stability and reliability of data transmission during spacecraft operations in *** have become essential components in high-speed networking and optically interconnected communications for *** stress simulation analysis is important for evaluating the temperature stress concentration phenomenon resulting from temperature fluctuations,temperature gradients,and other factors in aerospace optical cables and connectors under the combined effects of extreme temperatures and vacuum *** this,advanced optical communication technology has been widely used in high-speed railway communication networks to transmit safe,stable and reliable signals,as high-speed railway optical communication in special areas with extreme climates,such as cold and high-temperature regions,requires high-reliability optical cables and ***,based on the finite element method,comprehensive comparisons were made between the thermal distributions of aerospace optical cables and J599III fiber optic connectors under different conditions,providing a theoretical basis for evaluating the performance of aerospace optical cables and connectors in space environments and meanwhile building a technical foundation for potential optical communication applications in the field of high-speed railways.

关键词： Aerospace optical fiber Aerospace optic connector Simulation analysis

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