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忆阻器基神经形态计算器件与系统研究进展

电子与封装 2024年第4期24卷 63-74页

作者：郭文斌汪泽清吴祖恒蔺智挺安徽大学集成电路学院合肥230601 安徽省高性能集成电路工程研究中心合肥230601

忆阻器作为新原理器件,与现有互补金属氧化物半导体(CMOS)器件相比,具有结构简单、集成密度高、微缩性好、操作能耗低、易于三维集成等优点,是实现神经形态计算技术的理想存储器件之一。对近年来忆阻器基神经形态计算技术的研究进展进... 详细信息

忆阻器作为新原理器件,与现有互补金属氧化物半导体(CMOS)器件相比,具有结构简单、集成密度高、微缩性好、操作能耗低、易于三维集成等优点,是实现神经形态计算技术的理想存储器件之一。对近年来忆阻器基神经形态计算技术的研究进展进行综述,包括忆阻器基神经突触和神经元功能实现以及忆阻器基神经形态计算系统研究进展,并对当前忆阻器基神经形态计算技术仍然面临的挑战进行总结,对其前景做了展望。

关键词：忆阻器神经形态计算突触神经元

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压气机叶顶间隙流动与控制研究进展

储能科学与技术 2024年第6期13卷 1940-1962页

作者：韩汶昕张雪辉许剑傅力宏蒋鑫郭文宾谢宇超陈海生中国科学院工程热物理研究所北京100190 中国科学院大学北京100049 中国科学院办公厅北京100045 杭州电子科技大学能源研究所浙江杭州310018

压缩空气储能被视为最具发展潜力的物理储能技术,作为其核心部件,压气机的性能表现在较大程度上决定着储能系统的经济性和效率。叶顶间隙流动因其复杂的三维流动特性,对压气机内部流场结构变化存在重要作用,是影响整机性能的关键因素。... 详细信息

压缩空气储能被视为最具发展潜力的物理储能技术,作为其核心部件,压气机的性能表现在较大程度上决定着储能系统的经济性和效率。叶顶间隙流动因其复杂的三维流动特性,对压气机内部流场结构变化存在重要作用,是影响整机性能的关键因素。文章依照叶顶结构特点分类总结了带冠、无冠轴流压气机和开式/半开式、闭式离心压气机叶顶间隙流动产生的机理,根据压气机流动特性,进一步综述国内外压气机叶顶间隙流动的研究进展,形成以下结论:对于无冠轴流压气机,非定常叶顶间隙流动与失速、叶片噪声及振动问题密切相关,需扩充研究成果以优化叶顶设计;带冠轴流压气机缺乏实验和数据支撑,流动控制手段单一,可尝试跨领域应用控制技术;离心压气机叶顶间隙流动研究仍需探索变间隙特性和周向不均匀性对流动结构的影响,并提升应对流场变化的能力。未来研究可着重于高精度数值模拟方法的应用推广、跨领域控制技术的尝试和复合结构的探索。

关键词：压缩空气储能压气机叶顶间隙流动流动控制技术

Atomic scale investigation of FCC→HCP reverse phase transformation in face-centered cubic zirconium

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Journal of Materials Science & Technology 2023年第6期137卷 8-13页

作者： wenbin guo Fuzhou Han Geping Li Yingdong Zhang Muhammad Ali Jie Ren Qichen Wang Fusen Yuan School of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026China Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

Mechanism of FCC→HCP reverse phase transformation in face-centered cubic zirconium(FCC-Zr)along with a concomitant 70.5°rotation ofα-Zr matrix were investigated in zircaloy-4(Zr-4)cladding tube by using transmission electron microscopy(TEM).Results showed that the interaction among a secondary phase particle(SPP)and three FCC-Zr grains resulted in the formation of cross stacking faults in SPP and exerted a drag force on minor axis of the adjacent FCC-Zr ***,when the shear stress along[112]_(FCC-Zr)direction was large enough to initiate the emission of 1/6[112]Shockley partial dislocation on every other(111)_(FCC-Zr)close-packed plane,the stacking sequence would change from ABC ABCA to AB ABABA viz.(0001)planes of the daughter HCP ***,FCC→HCP reverse phase transformation in FCC-Zr was presented.

关键词： Zircaloy-4 Reverse phase transformation Fcc-Zr phase Interaction

瞬变电磁TEM技术在地下电网检测中的应用比较研究

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粘接 2024年第5期51卷 165-168页

作者：贾浩刘鹏涛郭文斌唐亮高阳国网新疆电力有限公司新疆乌鲁木齐830063

为确定地下电网中导体分布,提出了一种基于瞬变电磁(TEM)的地下电网检测方案。通过比较在固定采样时间内不同测量点记录的表面磁场强度,从而确定导体的相关位置。根据磁场强度确定等效电阻率从而绘制等效电阻率的等值线图和三维面图,其... 详细信息

为确定地下电网中导体分布,提出了一种基于瞬变电磁(TEM)的地下电网检测方案。通过比较在固定采样时间内不同测量点记录的表面磁场强度,从而确定导体的相关位置。根据磁场强度确定等效电阻率从而绘制等效电阻率的等值线图和三维面图,其中位于网格中心的点的等效电阻率远小于其他点的等效电阻率,而位于地下导体正上方的点的等效电阻率远高于其他点的等效电阻率。通过案例分析,所提方案可较为准确的给出地下电网的结构。

关键词：地下电网瞬变电磁磁场强度等效电阻率

Teukolsky-like equations with various spins in spherically symmetric spacetime

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Chinese Physics C 2024年第8期48卷 213-223页

作者： Ya guo Hiroaki Nakajima wenbin Lin School of Physical Science and Technology Southwest Jiaotong UniversityChengdu 610031China School of Mathematics and Physics University of South ChinaHengyang 421001China

We study wave equations with various spins on the background of a general spherically symmetric *** obtain the unified expression of the Teukolsky-like master equations and the corresponding radial equations with the general *** also discuss the gauge dependence in the gravitational-wave equations,which have appeared in previous studies.

关键词： gravitational wave effective one-body dynamics Teukolsky equation wave equations Klein-Gordon equation Weyl equation Maxwell equation

Ultra-antifreeze,ultra-stretchable,transparent,and conductive hydrogel for multi-functional flexible electronics as strain sensor and triboelectric nanogenerator

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Nano Research 2022年第6期15卷 5461-5468页

作者： Xinhuan Dai Yong Long Bing Jiang wenbin guo Wei Sha Jiangwen Wang Zifeng Cong Jiwei Chen Bingjun Wang Weiguo Hu Chinese Academy of Sciences Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 101400China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China Center on Nanoenergy Research School of Physical Science and TechnologyGuangxi UniversityNanning 530004China

Conductive hydrogels have become one of the most promising candidates for flexible electronics due to their excellent mechanical flexibility,durability of deformation,and good electrical ***,in real applications,severe environments occur frequently,such as extremely cold *** hydrogels always lack anti-freeze and anti-dehydration ***,the functions of electronic devices based on traditional hydrogels will quickly fail in extreme ***,the development of environmentally robust hydrogels that can withstand extremely low temperatures,overcome dehydration,and ensure the stable operation of electronic devices has become increasingly ***,we report a kind of graphene oxide(GO)incorporated polyvinyl alcohol-polyacrylamide(PVA-PAAm)double network hydrogel(GPPDhydrogel)which shows excellent anti-freeze *** GPPD-hydrogel exhibits not only good flexibility and ultra-high stretchability up to 2,000%,but ensures a high sensitivity when used as the strain sensor at−50°*** importantly,when serving as the electrode of a sandwich-structural triboelectric nanogenerator(TENG),the GPPD-hydrogel endows the TENG high and stable output performances even under−80°***,the GPPD-hydrogel is demonstrated long-lasting moisture retention over 100 *** GPPD-hydrogel provides a reliable and promising candidate for the new generation of wearable electronics.

关键词： triboelectric nanogenerators antifreeze ultra-stretchable hydrogels strain sensors multi-functional flexible electronics

Nano-refinement of the face-centered cubic Zr(Fe,Cr)_(2)secondary phase particles in Zircaloy-4 alloy via localized-shearing/bending-driven fracture under high-temperature compression

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Journal of Materials Science & Technology 2023年第34期165卷 8-16页

作者： Fuzhou Han Geping Li Fusen Yuan wenbin guo Jie Ren Qichen Wang Yingdong Zhang Ali Muhammad Chengze Liu Hengfei Gu Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China University of Chinese Academy of Sciences Beijing 100049China

Nanoparticles are extensively introduced to improve the mechanical,physical,and chemical properties of *** the present study,the underlying nano-refinement mechanisms of face-centered cubic Zr(Fe,Cr)_(2)secondary phase particles(SPPs)that precipitated in Zircaloy-4 alloy under high-temperature compression were investigated in detail by utilizing high-resolution transmission electron microscopy(HRTEM)and conventional TEM *** frequently observed Zr(Fe,Cr)_(2)SPPs were incoherent with the matrix and exhibited brittle fracture behaviors without measurable *** observations revealed two mechanisms underlying the nano-refinement of incoherent micro-sized SPPs via localized shear fracture on{11¯2}SPP and nanoprecipitate-assisted bending fracture,*** latter was,for the first time,found to occur when the movements of large SPPs were blocked by nanometer-sized SPP during alloy ***,two force models were proposed to visualize their potential nano-refinement *** knowledge attained from this study sheds new light on the deformation behaviors of Zr(Fe,Cr)_(2)SPPs and their associated size refinement mechanisms under high-temperature compression,and is expected to greatly benefit the process optimization of zirconium alloys to achieve precipitate nano-refinement.

关键词： Secondary phase particles Nano-refinement mechanism Shearing and bending fracture modes Zirconium alloys High-temperature compression

Jet formation and penetration performance of a double-layer charge liner with chemically-deposited tungsten as the inner liner

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Defence Technology（防务技术） 2024年第3期33卷 374-385页

作者： Bihui Hong wenbin Li Yiming Li Zhiwei guo Binyou Yan Ministerial Key Laboratory of ZNDY Nanjing University of Science and TechnologyNanjing 210094China State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing 100081China Xiamen Tungsten Co. Ltd.Xiamen 361004China

This paper proposes a type of double-layer charge liner fabricated using chemical vapor deposition(CVD)that has tungsten as its inner *** feasibility of this design was evaluated through penetration ***-layer charge liners were fabricated by using CVD to deposit tungsten layers on the inner surfaces of pure T2 copper *** microstructures of the tungsten layers were analyzed using a scanning electron microscope(SEM).The feasibility analysis was carried out by pulsed X-rays,slug-retrieval test and static penetration *** shaped charge jet forming and penetration law of inner tungsten-coated double-layer liner were studied by numerical simulation *** results showed that the double-layer liners could form well-shaped *** errors between the X-ray test results and the numerical results were within 11.07%.A slug-retrieval test was found that the retrieved slug was similar to a numerically simulated *** with the traditional pure copper shaped charge jet,the penetration depth of the double-layer shaped charge liner increased by 11.4% and>10.8% *** summary,the test results are good,and the numerical simulation is in good agreement with the test,which verified the feasibility of using the CVD method to fabricate double-layer charge liners with a high-density and high-strength refractory metal as the inner liner.

关键词： Shaped charge Chemical vapor deposition Tungsten Double-layer charge liner X-ray Penetration

Deformation twinning in octahe dron-base d face-centere d cubic metallic structures:Localized shear-force dipoles drive atomic displacements

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Journal of Materials Science & Technology 2022年第31期126卷 116-126页

作者： Hengfei Gu Chengze Liu Fusen Yuan Fuzhou Han Yingdong Zhang Muhammad Ali wenbin guo Jie Ren Lifeng Zhang Songquan Wu Geping Li Institute of Metal Research Chinese Academy of SciencesShenyang 110016China University of Chinese Academy of Sciences Beijing 100049China University of Science and Technology of China Hefei 230026China Institute of Molecular Plus Tianjin UniversityTianjin 300072China School of Materials Science and Engineering University of Shanghai for Science and TechnologyShanghai 200093China

Twinning is found to impart favorable mechanical,physical and chemical properties to nanostructured *** twinning prevails in face-centered cubic(FCC)nanocrystalline materials upon *** FCC structures,the{111}deformation twinning is traditionally believed to nucleate and grow through layer-by-layer emission of 1/6Shockley partial dislocations on consecutive{111}*** report that deformation twinning is able to occur in crystalline(Fe,Nb)_(23)Zr_(6)nanoparticles(NPs)that have a large Mn 23 Th 6-type FCC structure with a Zr-octahedron as a *** on direct atomic-scale observations,we discover a new zero-net-strain path for the{111}deformation twin-ning in FCC *** form a[¯1¯12]/(111)twin,for example,short(¯1¯11)planes within two adjacent(111)plane layers in the repeated three-layer sequence of(111)planes are shear deformed continuously by a shear-force dipole along the[11¯2]direction like a domino effect,whereas the other(111)plane in the repeated sequence remains *** addition,a loading criterion for deformation twinning of a FCC NP under uniaxial compression is proposed based on our *** work here not only extends the fundamental understanding on deformation twinning in FCC structures,but also opens up studies of deformation behaviors in a class of Mn 23 Th 6-type FCC materials.

关键词： deformation cubic dipole