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Resistive switching and artificial synaptic performances of memristor based on low-dimensional bismuth halide perovskites

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Nano Research 2023年第7期16卷 10108-10119页

作者： Feifei Luo Yanzhao Wu junwei tong Fubo Tian Xianmin Zhang Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China Department of Physics Freie Universität Berlin14195 BerlinGermany State Key Laboratory of Superhard Materials College of PhysicsJilin UniversityChangchun 130012China

Zero-dimensional(0D)-Cs_(3)Bi_(2)I_(9),two-dimensional(2D)-Cs_(3)Bi_(2)Br_(9),and one-dimensional(1D)-Cs3Bi2Cl9 perovskite films have been successfully grown on indium tin oxide(ITO)glass substrates,which were used to fabricate memristors with the structure of Al/Cs_(3)Bi_(2)X_(9)(X=I,Br,and Cl)/ITO *** current three types of memristors exhibited bipolar resistive switching *** the endurance and retention time tests clearly demonstrated the excellent stability of present ***,the ON/OFF ratio of the 0D-Cs_(3)Bi_(2)I_(9)device is close to 104 at the reading voltage of 0.1 V,which is nearly 100 and 1000 times larger than those of the 1D-Cs3Bi2Cl9 device and the 2D-Cs_(3)Bi_(2)Br_(9)device,*** activation energy of halide vacancies in the Cs_(3)Bi_(2)X_(9)(X=I,Br,and Cl)films was calculated using the density functional theory by considering a minimum migration path,demonstrating the dimensionality of the Cs_(3)Bi_(2)X_(9)(X=I,Br,and Cl)film affected the formation and rupture of conductive ***,the short-term plasticity and long-term plasticity of biological synapse were simulated by evaluating the conductance responses of Al/Cs_(3)Bi_(2)X_(9)(X=I,Br,and Cl)/ITO devices under various voltage pulses in *** duration time of long-term plasticity in all the present devices can last for up to 250 *** 0D-Cs_(3)Bi_(2)I_(9)device showed both the highest spikeduration-dependent plasticity and paired-pulse facilitation indexes compared to the other two ***,the 0DCs_(3)Bi_(2)I_(9)device successfully established the associative learning behavior by simulating the Pavlov’s dog experiment.

关键词： perovskite films low-dimension resistive switching artificial synapse

Electrically manipulating magnetization reversal via energy band engineering

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Science China(Physics,Mechanics & Astronomy) 2023年第5期66卷 181-187页

作者： junwei tong Yanzhao Wu Feifei Luo Fubo Tian Xianmin Zhang Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Material Science and EngineeringNortheastern UniversityShenyang 110819China Department of Physics Freie Universität BerlinBerlin 14195Germany State Key Laboratory of Superhard Materials College of PhysicsJilin UniversityChangchun 130012China

Realization of a magnetization reversal by an external electric field is vital for developing ultra-low-power spintronic *** this report,starting from energy band engineering,a general design principle is proposed for achieving electrical manipulation of a nonvolatile 180°magnetization reversal.A half semiconductor(HSC)and a bipolar magnetic semiconductor(BMS)are selected as the model of magnetic layers,whose conduction-band minimum and valence-band maximum are in the same and opposite spin states,*** on the analysis of virtual hopping and tight-binding models,the interlayer coupling of HSC/insulator/BMS devices is successfully tuned between ferromagnetic and antiferromagnetic interactions by varying electric field ***,the interlayer coupling nearly disappears after removing the electric field,proving the nonvolatile magnetization *** first-principles calculations,the feasibility of present design strategy is further confirmed by a representative device with the structure of CrBr3/h-BN/2H-VSe_(2).This design guideline and physical phenomena may open an avenue to explore magnetoelectric coupling mechanisms and develop next-generation spintronic devices.

关键词： magnetic semiconductor magnetization reversal energy band engineering

“以赛促学,以赛促教”驱动学生创新意识课程教学改革研究——以汽车服务工程专业为例

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时代汽车 2024年第16期 85-87页

作者：童俊炜邓腾树林亮淮泉州师范学院交通与航海学院福建泉州362000 德化县人力资源和社会保障局福建泉州362500

“以赛促学、以赛促教”的教学模式,将竞赛活动作为教学的重要组成部分,形成赛教融合,驱动学生创新意识和动手实践能力,促进教学内容和方法的创新。根据不同年级学生知识体系,选择相关性强的学科竞赛项目,形成差异化的赛教融合教学模式... 详细信息

“以赛促学、以赛促教”的教学模式,将竞赛活动作为教学的重要组成部分,形成赛教融合,驱动学生创新意识和动手实践能力,促进教学内容和方法的创新。根据不同年级学生知识体系,选择相关性强的学科竞赛项目,形成差异化的赛教融合教学模式。同时,教师根据竞赛项目的要求和难点,调整教学方法和手段,使教学更加贴近实际、更加具有针对性。

关键词： “以赛促学以赛促教” 差异化教学模式

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基于AutoCAD的地形模拟与区域土方量算的研究

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科学技术创新 2024年第1期 29-32页

作者：罗胜飞童俊维李志勇郴州市北湖区自然资源事务中心湖南郴州

以AutoCAD为强大平台,凭借VBA开发语言的优势,我们采用软件工程的精湛方法,利用面向对象的建模技术和组件开发方式,巧妙地调用Surfer软件,打造出了一个独特的三维地形动态显示及土方量计算系统。我们深入剖析了构建此系统的核心技术和方... 详细信息

以AutoCAD为强大平台,凭借VBA开发语言的优势,我们采用软件工程的精湛方法,利用面向对象的建模技术和组件开发方式,巧妙地调用Surfer软件,打造出了一个独特的三维地形动态显示及土方量计算系统。我们深入剖析了构建此系统的核心技术和方法,巧妙地采用了三层架构体系,实现了三维地形建模、显示、自由浏览和土方量计算等多项功能。这一系统已经成功应用于浮丘山的三维模拟,能够直观地展示工程场地的宏伟三维场景,对于前期场地平整和土地利用规划起到了重要的指导作用。

关键词： AutoCAD VBA Surfur 三维地形土方量算

High-efficiency resistive switch and artificial synaptic simulation in antimony-based perovskite devices

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Science China(Technological Sciences) 2023年第4期66卷 1141-1151页

作者： LUO FeiFei WU YanZhao tong junwei XU DaKe QIN GaoWu TIAN FuBo ZHANG XianMin Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China Department of Physics Freie Universitat Berlin14195 BerlinGermany State Key Laboratory of Superhard Materials College of PhysicsJilin UniversityChangchun 130012China

Three kinds of Cs_(3)Sb_(2)X_(9)(X=I,Br,Cl)perovskite films have been prepared to fabricate the resistive memory devices with the structure of Al/Cs_(3)Sb_(2)X_(9)(X=I,Br,Cl)/indium tin oxide(ITO)*** devices exhibited a bipolar resistive switching behavior at room temperature by applying scanning voltage of 0→1→0→-1.8→0 *** switching voltages in the Al/Cs_(3)Sb_(2)X_(9)(X=I,Br,Cl)/ITO devices gradually decreased with the X from I,Br to Cl due to the different migration rates of halide vacancy in perovskite films,which is confirmed by the first-principles calculations of activation *** ON/OFF ratio under the reading voltage of 0.1 V significantly increased up to 100 in the Al/Cs_(3)Sb_(2)Cl_(9)/ITO device,which is nearly 10 and 3 times larger than that of the Al/Cs3Sb2I9/ITO device and the Al/Cs_(3)Sb_(2)Br_(9)/ITO device,*** endurance cycles and retention time of current devices were evaluated,showing the excellent electrical ***,the three kinds of Al/Cs_(3)Sb_(2)X_(9)(X=I,Br,Cl)/ITO device can successfully simulate the short-term plasticity of biological *** Al/Cs_(3)Sb_(2)Cl_(9)/ITO device showed the highest paired-pulsed facilitation index compared with that of other two devices,which was explored for the longterm plasticity and learning experience processes of *** addition,the Al/Cs_(3)Sb_(2)Cl_(9)/ITO device established associative learning behavior by simulating the Pavlov’s dog experiment.

关键词： perovskitefilms resistive switching artificial synapse

Multi-prior physics-enhanced neural network enables pixel super-resolution and twin-imagefree phase retrieval from single-shot hologram

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Opto-Electronic Advances 2024年第9期7卷 22-38页

作者： Xuan Tian Runze Li tong Peng Yuge Xue junwei Min Xing Li Chen Bai Baoli Yao State Key Laboratory of Transient Optics and Photonics Xi’an Institute of Optics and Precision MechanicsChinese Academy of SciencesXi’an 710119China University of Chinese Academy of Sciences Beijing 100049China.

Digital in-line holographic microscopy(DIHM)is a widely used interference technique for real-time reconstruction of living cells’morphological information with large space-bandwidth product and compact ***,the need for a larger pixel size of detector to improve imaging photosensitivity,field-of-view,and signal-to-noise ratio often leads to the loss of sub-pixel information and limited pixel ***,the twin-image appearing in the reconstruction severely degrades the quality of the reconstructed *** deep learning(DL)approach has emerged as a powerful tool for phase retrieval in DIHM,effectively addressing these ***,most DL-based strategies are datadriven or end-to-end net approaches,suffering from excessive data dependency and limited generalization ***,a novel multi-prior physics-enhanced neural network with pixel super-resolution(MPPN-PSR)for phase retrieval of DIHM is *** encapsulates the physical model prior,sparsity prior and deep image prior in an untrained deep neural *** effectiveness and feasibility of MPPN-PSR are demonstrated by comparing it with other traditional and learning-based phase retrieval *** the capabilities of pixel super-resolution,twin-image elimination and high-throughput jointly from a single-shot intensity measurement,the proposed DIHM approach is expected to be widely adopted in biomedical workflow and industrial measurement.

关键词： optical microscopy quantitative phase imaging digital holographic microscopy deep learning super-resolution

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基于遗传算法的汽车底盘控制优化技术研究

重庆科技学院学报（自然科学版） 2020年第3期22卷 92-96页

作者：童俊炜蔡祥鹏泉州师范学院航海学院福建泉州362000

为改善汽车底盘控制系统性能,提出了一种优化底盘控制系统参数的方法。通过构建汽车底盘控制系统模型,设计主动悬架系统控制器、主动前轮转向系统滑模变结构控制器及制动系统控制器,选用系统机械和控制参数作为优化变量,以汽车动力学集... 详细信息

为改善汽车底盘控制系统性能,提出了一种优化底盘控制系统参数的方法。通过构建汽车底盘控制系统模型,设计主动悬架系统控制器、主动前轮转向系统滑模变结构控制器及制动系统控制器,选用系统机械和控制参数作为优化变量,以汽车动力学集成性能参数作为优化目标,采用遗传算法进行优化方法设计。仿真实验结果表明,对底盘控制系统参数优化后,提高了汽车的操纵稳定性与乘坐舒适度。

关键词：电动汽车智能控制底盘控制系统设计参数优化遗传算法

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自动变速器比例电磁阀高温失效就车检测法

泉州师范学院学报 2018年第6期36卷 41-45页

作者：蔡祥鹏童俊炜泉州师范学院航海学院福建泉州362000

自动变速器由于高温而产生失效的故障,其主要驱动执行元件比例电磁阀占了很大部分.流经电磁阀线圈的电流是影响比例电磁阀电磁力的主要参数,因此,可采用就车检测比例电磁阀在不同油液温度下的电流方法,判断电磁阀是否高温失效.并通过制... 详细信息

自动变速器由于高温而产生失效的故障,其主要驱动执行元件比例电磁阀占了很大部分.流经电磁阀线圈的电流是影响比例电磁阀电磁力的主要参数,因此,可采用就车检测比例电磁阀在不同油液温度下的电流方法,判断电磁阀是否高温失效.并通过制作脉冲信号发生器和液压实验回路,测试正常温度和高温下电磁阀的电流和压力值,验证了就车电流检测方法的可靠性.

关键词：比例电磁阀高温失效电流就车检测

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基于DOE的汽车外后视镜气动减阻优化

泉州师范学院学报 2022年第2期40卷 84-90页

作者：蔡祥鹏陈基童俊炜泉州师范学院交通与航海学院福建泉州362000 东南(福建)汽车工业有限公司福建福州350119

以国内某款SUV车型的汽车外后视镜作为研究对象,对后视镜进行形貌变形分析,提出基于试验设计的优化方法.对三维模型进行有限元网格无关性验证,通过仿真计算得到该车型初始造型的整车风阻系数C;和后视镜表面压力云图.选取后视镜上半部分... 详细信息

以国内某款SUV车型的汽车外后视镜作为研究对象,对后视镜进行形貌变形分析,提出基于试验设计的优化方法.对三维模型进行有限元网格无关性验证,通过仿真计算得到该车型初始造型的整车风阻系数C;和后视镜表面压力云图.选取后视镜上半部分形貌变形区域上与面网格贴合的控制点作为设计变量,利用均匀拉丁超立方选点方式对变形网格样本点抽样,通过STAR-CCM+软件进行整车气动阻力分析.并相比初始模型,得到最佳减阻方案在整车风阻系数和后视镜表面压力方面都有下降.最后,通过整车风洞试验对优化方案进行实验验证.

关键词：车外后视镜气动阻力均匀拉丁超立方法