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Graphene oxide/Al_(2)O_(3)-based diffusive memristor cells:enabling robust crossbar arrays for multidisciplinary applications

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Rare Metals 2024年第8期43卷 3997-4005页

作者： Chen Liu Jun-Cheng Jin yi-ke xiao Xin-Xin Wang Ping-Yuan Yan Yan-Qiang Cao Li-Yong Jiang Chuan-Xiang Sheng Ye-Feng Yu School of Microelectronics Nanjing University of Science and TechnologyNanjing 210094China School of Science Nanjing University of Science and TechnologyNanjing210094China School of Information Science and Technology Fudan UniversityShanghai 200433China

A memristor crossbar array (MCA) has emerged as a cutting-edge platform for advanced memory and neuromorphic computing hardware,offering unrivaled bit-level storage density.A diffusive memristor cell (DMC) is particularly well-suited for MCA integration due to its inherent threshold switching characteristics as a selector,effectively addressing current sneak path *** DMC's potential is acknowledged,it necessitates furtherexploration of their practical applicability.

关键词： crossbar arrays offering

Tuning the interfacial reaction environment via pH-dependent and induced ions to understand C–N bonds coupling performance in NO3- integrated CO2 reduction to carbon and nitrogen compounds over dual Cu-based N-doped carbon catalyst

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Journal of Energy Chemistry 2025年第1期100卷 273-285页

作者： Tianhang Zhou Chen Shen Zhenghao Wu Xingying Lan yi xiao College of Carbon Neutrality Future Technology State Key Laboratory of Heavy Oil Processing China University of Petroleum (Beijing) Institute of Materials Science TU Darmstadt Department of Chemistry Xi'an Jiaotong-Liverpool University Department of Mechanical and Mechatronics Engineering and Waterloo Institute of Nanotechnology University of Waterloo Waterloo

Dual atomic catalysts （DAC）,particularly copper （Cu2）-based nitrogen （N） doped graphene,show great potential to effectively convert CO2and nitrate （NO3-） into important industrial chemicals such as ethylene,glycol,acetamide,and urea through an efficient catalytical process that involves C–C and C–N ***,the origin of the coupling activity remained unclear,which substantially hinders the rational design of Cu-based catalysts for the N-integrated CO2reduction reaction （CO2RR）.To address this challenge,this work performed advanced density functional theory calculations incorporating explicit solvation based on a Cu2-based N-doped carbon (Cu2N6C10) catalyst for *** calculations are aimed to gain insight into the reaction mechanisms for the synthesis of ethylene,acetamide,and urea via coupling in the interfacial reaction *** to the sluggishness of CO2,the formation of a solvation electric layer by anions （F-,Cl-,Br-,and I-） and cations (Na+,Mg2+,K+,and Ca2+) leads to electron transfer towards the Cu *** process significantly accelerates the reduction of *** results reveal that*CO intermediates play a pivotal role in N-integrated ***,the Cu2-based N-doped carbon catalyst examined in this study has demonstrated the most potential for C–N coupling to *** findings reveal that through the process of a condensation reaction between*CO and NH2OH for urea synthesis,*NO3-is reduced to*NH3,and*CO2to*CCO at dual Cu atom *** dual-site reduction facilitates the synthesis of acetamide through a nucleophilic reaction between NH3and the ketene ***,we found that the I-and Mg2+ions,influenced by pH,were highly effective for acetamide and ammonia synthesis,except when F-and Ca2+were ***,the mechanisms of C–N bond formation were investigated via ab-initio molecular dynamics simulations,and we found that adjusting the micro-environment can change the dominant side reaction,shift

关键词： Condensation reactions

基于非线性零空间的雷达一维距离像目标识别方法

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计算机应用 2011年第A1期31卷 55-57页

作者：易晓柯杨万麟电子科技大学电子工程学院成都611731

针对雷达一维距离像样本对样本姿态角的敏感性、样本分布的非线性、样本残缺等问题,提出一种基于非线性零空间雷达目标一维距离像识别方法,通过引入核函数来处理一维距离像目标样本分布中的非线性问题,采用零空间提取最具辨别力的特征信... 详细信息

针对雷达一维距离像样本对样本姿态角的敏感性、样本分布的非线性、样本残缺等问题,提出一种基于非线性零空间雷达目标一维距离像识别方法,通过引入核函数来处理一维距离像目标样本分布中的非线性问题,采用零空间提取最具辨别力的特征信息,最后使用支持向量机处理样本残缺问题并进行分类识别。该方法能有效解决上述问题,并最终提高雷达一维距离像的识别性能。选取3种不同飞机目标的一维距离像进行了仿真实验,识别结果表明了该方法有较高的识别正确率以及良好的抗噪性能。

关键词：支持向量机非线性零空间一维距离像目标识别

水下目标辐射噪声的子波变换和高阶累积量联合分析

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系统仿真学报 2001年第2期13卷 175-177页

作者：黄建国仪晓可张群飞西北工业大学航海工程学院 22西安710072

将子波变换和高阶累积量联合分析应用于对水下目标辐射噪声的特征提取。首先利用子波变换提取辐射噪声的动态调制分量，然后应用四阶累量对角切片的傅立叶变换（21/2维谱）分析该动态调制的谐波特性。结果表明，该方法可以有效地实现动... 详细信息

将子波变换和高阶累积量联合分析应用于对水下目标辐射噪声的特征提取。首先利用子波变换提取辐射噪声的动态调制分量，然后应用四阶累量对角切片的傅立叶变换（21/2维谱）分析该动态调制的谐波特性。结果表明，该方法可以有效地实现动态调制分量与其他信号的分离，准确提取谐波特征。由于四阶累量对高斯噪声的抑制性，该方法还具有很强的抗噪性。此外，相对与双谱和三谱分析，21/2维谱分析极大减少了计算量，降低了方法的复杂程度，具有较快的运算速度。

关键词：子波变换动态调制高阶累积量水下目标辐射噪声水声

机械设计制造及自动化专业选修课建设的定位思考

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湖南科技学院学报 2006年第11期27卷 291-293页

作者：易晓科湖南理工学院机电系湖南岳阳414000

笔者从机械设计制造及自动化专业选修课教学入手,分析了当前及将来社会对机电专业人才发展的需要,通过对目前机械设计制造及自动化专业课程设置及选修课开设现状的思考,从优化课程设置、合理安排时间,到科学教学与管理进行了一些理性的... 详细信息

笔者从机械设计制造及自动化专业选修课教学入手,分析了当前及将来社会对机电专业人才发展的需要,通过对目前机械设计制造及自动化专业课程设置及选修课开设现状的思考,从优化课程设置、合理安排时间,到科学教学与管理进行了一些理性的探讨。选修课程体系的合理建设和科学管理是高校教学改革的重要措施。

关键词：选修课专业建设理性思考教学改革机械设计制造及自动化专业

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支持向量机的全局局部特征融合目标识别

雷达科学与技术 2011年第2期9卷 180-182,187页

作者：易晓柯电子科技大学电子工程学院四川成都611731

提出一种基于支持向量机的全局局部特征融合目标识别方法,并将其运用到雷达一维距离像目标识别。该方法采用非线性辨别方法与局部保留映射方法分别提取样本的非线性全局特征与局部特征,并进行特征融合,以便提取更全面的样本特征,得到更... 详细信息

提出一种基于支持向量机的全局局部特征融合目标识别方法,并将其运用到雷达一维距离像目标识别。该方法采用非线性辨别方法与局部保留映射方法分别提取样本的非线性全局特征与局部特征,并进行特征融合,以便提取更全面的样本特征,得到更加准确的识别结果,随后采用支持向量机进行分类识别,利用其对于非线性小样本问题的强大处理能力,进一步改善识别结果。对三种飞机目标的实测雷达一维距离像进行了仿真实验,结果表明了方法的有效性。

关键词：特征融合全局特征局部特征支持向量机目标识别

Induced pluripotent stem cell-related approaches to generate dopaminergic neurons for Parkinson's disease

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Neural Regeneration Research 2025年第11期20卷 3193-3206页

作者： Ling-xiao yi Hui Ren Woon Genevieve Saw Li Zeng Eng King Tan Zhi Dong Zhou National Neuroscience Institute Singapore Nanyang Technology University Singapore Department of Neurology Singapore General HospitalSingapore Signature Research Program in Neuroscience and Behavioral Disorders Duke-NUS Medical SchoolSingapore

The progressive loss of dopaminergic neurons in affected patient brains is one of the pathological features of Parkinson's disease,the second most common human neurodegenerative *** the detailed pathogenesis accounting for dopaminergic neuron degeneration in Parkinson's disease is still unclear,the advancement of stem cell approaches has shown promise for Parkinson's disease research and *** induced pluripotent stem cells have been commonly used to generate dopaminergic neurons,which has provided valuable insights to improve our understanding of Parkinson's disease pathogenesis and contributed to anti-Parkinson's disease *** current review discusses the practical approaches and potential applications of induced pluripotent stem cell techniques for generating and differentiating dopaminergic neurons from induced pluripotent stem *** benefits of induced pluripotent stem cell-based research are *** dopaminergic neuron differentiation protocols from induced pluripotent stem cells are *** emerging three-dimension-based brain organoid models compared with conventional two-dimensional cell culture are ***,limitations,challenges,and future directions of induced pluripotent stem cell–based approaches are analyzed and proposed,which will be significant to the future application of induced pluripotent stem cell-related techniques for Parkinson's disease.

关键词： dopaminergic neurons induced pluripotent stem cells Parkinson's disease stem cell approaches

Homologous CoS2 interface with directed electron transfer and strong chloridion repulsion for efficient seawater oxidation

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Science China Chemistry 2025年

作者： Yuan Tian Jiang-Bo Chen Jie ying Ge Tian Yu-Xuan xiao yi Lu Si-Ming Wu Wei Geng Ling Shen xiao-Yu Yang State key Laboratory of Advanced Technology for Materials Synthesis and Processing and School of Materials Science and Engineering and Shenzhen Research Institute & Laoshan Laboratory Wuhan University of Technology School of Chemical Engineering and Technology Sun Yat-Sen University National Energy key Laboratory for New Hydrogen-Ammonia Energy Technologies Foshan Xianhu Laboratory

Seawater electrolysis is a highly promising method to produce high energy density hydrogen,especially in dry areas that have scarce freshwater ***,application of seawater electrolysis is confronted by two major problems associated with catalysts employed for the anodic oxygen evolution reaction （OER） including the competitive hypochlorite evolution reaction（HCER） and strong chloridion （Cl–） triggered *** studies aimed at overcoming these problems,a facile method has been developed to synthesize a homologous CoS2heterojunction as an OER *** to a difference in work functions at the interface and increased electron density,this material has directed electron transfer and strong chloridion repulsion properties,*** have shown that CoS2achieves low overpotentials of 289 and 322 mV at 10 mA cm-2current density in respective alkaline （1 M KOH） and alkaline simulated seawater ***,the outstanding stability of CoS2is reflected in a negligible decline in activity during promotion of the OER for 100 *** of density functional theory calculations reveal that the homologous CoS2heterojunction promotes directed electron transport for optimizing adsorption/desorption of reactive species and heightens the Cl-adsorption energy for strongly repulsing Cl-,phenomena that enhance OER performance in alkaline simulated seawater.

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Electrochemical conversion of methane to bridge the gap in the artificial carbon cycle

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Journal of Energy Chemistry 2025年第1期100卷 286-308页

作者： Yuhao Peng Yuefeng Song Ihar Razanau Juanxiu xiao Wei xiao Di Hu Guoxiong Wang College of Chemistry and Molecular Sciences Hubei Key Laboratory of Electrochemical Power Sources Wuhan University State key Laboratory of Catalysis Dalian National Laboratory for Clean Energy iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) Dalian Institute of Chemical Physics Chinese Academy of Sciences Laboratory of Physical-Chemical Technologies SSPA Scientific and Practical Materials Research Centre of NAS of Belarus State key Laboratory of Marine Resources Utilization in South China Sea Collaborative Innovation Center of Marine Science and Technology School of Marine Science and Engineering Hainan University Department of Chemical and Environmental Engineering University of Nottingham Ningbo China

Methane, an abundant one-carbon（C1） resource, is extensively used in the industrial production of vital fuels and value-added chemicals. However, current industrial methane conversion technologies are energy-and carbon-intensive, mainly due to the high activation energy required to break the inert C–H bond, low selectivity, and problematic side reactions, including CO2emissions and coke deposition. Electrochemical conversion of methane（ECM） using intermittent renewable energy offers an attractive solution, due to its modular reactor design and operational flexibility across a broad spectrum of temperatures and pressures. This review emphasizes conversion pathways of methane in various reaction systems, highlighting the significance and advantages of ECM in facilitating a sustainable artificial carbon cycle. This work provides a comprehensive overview of conventional methane activation mechanisms and delineates the complete pathways of methane conversion in electrolysis contexts. Based on surface/interface chemistry, this work systematically analyzes proposed reaction pathways and corresponding strategies to enhance ECM efficiency towards various target products, including syngas, hydrocarbons, oxygenates, and advanced carbon materials. The discussion also encompasses opportunities and challenges for the ECM process, including insights into ECM pathways, rational electrocatalyst design, establishment of benchmarking protocols, electrolyte engineering, enhancement of CH4conversion rates, and minimization of CO2emission.

关键词： Activation energy