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Simulation of Synaptic Short-term Plasticity in the Ba(cF3SO3)2-doped PEO electrolyte film device

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Simulation of Synaptic Short-term Plasticity in the Ba(CF3SO...

tFc'15全国薄膜技术学术研讨会

作者： c.t.chang F.Zeng Laboratory of Advanced Materials(MOE) School of Materials Science and EngineeringTsinghua University

Brain-like computation is a springing-up research field for the construction of novel *** the way of simulating the plasticity of bio-synapses in devices,the signal processing system based on stimulation frequency was *** the device fabricated with barium trifluoromethanesulfonate(Ba(cFSO))-doped ethylene oxide(PEO)electrolyte film,we realized two kinds of synaptic short-term plasticity(StP):short-term depression(StD)and short-term facilitation(StF).With the ionic kinetics inside the PEO matrix,a decreasing charge peak sequence and an increasing discharge peak sequence were generated under the frequency-dependent pulse mode and manifested high-pass filtering and low-pass filtering properties *** addition,apart from the response form,the operation and mechanisms of the device and bio-synapses acting StP were comparable,which were both a filter system possessing weight-changed responses,frequency-dependency and hundreds-of-millisecond ***,we constructed a history-based weight expressions to simulate the charge and discharge peaks of the device resorting to the biological excitatory post-synaptic current(EPSc)model of *** work well confirmned the simulation feasibility of the device and provided a research orientation in brain-computation.

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明潭抽水蓄能电站地下厂房洞室设计

西北水电 1991年第1期 59-64页

作者： S.c.Liu Y.cheng c.t.chang 刘琦凤

明潭(Mingtan)地下厂房洞室是台湾最大的地下厂房之一.洞室的最佳方位及形状是根据地质、应力分析和施工条件确定的.洞顶出露的平行粘土夹层采用高压水射流冲洗软弱夹层井用不收缩的砂浆回填的方法,在总体开挖前从一些小的平洞中进行处... 详细信息

明潭(Mingtan)地下厂房洞室是台湾最大的地下厂房之一.洞室的最佳方位及形状是根据地质、应力分析和施工条件确定的.洞顶出露的平行粘土夹层采用高压水射流冲洗软弱夹层井用不收缩的砂浆回填的方法,在总体开挖前从一些小的平洞中进行处理的.同时,为了加固洞顶,在开挖前从平洞中安装了具有防腐波形护套的高强度预应力锚索.岩石锚杆、预应力锚索及钢纤维喷混凝土组成的柔性支护系统在整个洞室周围形成自支撑岩体,大型地下洞室开挖中采用这种支护系统在台湾尚属首次.

关键词：洞室地下厂房洞顶预应力锚索岩石锚杆钢纤维节理面软弱夹层喷混凝土层理面

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棉花黄萎病病原菌的生理研究

沈阳农学院学报 1956年第1期 55-62页

作者：韦石泉张际中

1.棉黄萎病病原菌,经鉴定后,采用 Verticillium albo-atrum Reinke et Berthold学名。2.最适本病原菌生育的培养基,以改良 czepek’s 组合和马铃薯培养基为最好,在这两种培养基上菌丝生长旺盛,经过4—5天后都能生很多分生孢子,并渐生成... 详细信息

1.棉黄萎病病原菌,经鉴定后,采用 Verticillium albo-atrum Reinke et Berthold学名。2.最适本病原菌生育的培养基,以改良 czepek’s 组合和马铃薯培养基为最好,在这两种培养基上菌丝生长旺盛,经过4—5天后都能生很多分生孢子,并渐生成小菌核。3.本病原菌的发育温度以17°—28℃较好、其中尤以25℃最好。孢子发芽温度以15°—20℃篇最好、在1%葡萄糖液中发芽最好。但在灭菌水中发芽亦好,对营养的要求并不太高。4.本病原菌自苗期(具四真药)开始直至后期,皆能侵入棉株内部,其中尤以用孢子悬浮液于棉根附近接种的办法,得知在开花期至结铃期皆能显现较高的发病率、根据实验记载,在棉花生育期中,接种后一般8—16天左右即能现出病征,此比前人记载期限较早。

关键词：病原菌苗期子登棉黄萎病黄萎病菌生理研究

china, Malaysia, and an Emerging New World Order

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china Report ASEAN 2024年第7期9卷 32-33页

作者： Peter t c chang Institute of china Studies University of Malaya

the strong relationship between china and Malaysia can be a catalyst for advancing a more stable and representative world *** leveraging their close ties,both nations can collaborate on diplomatic initiatives,economic... 详细信息

关键词： order stability catalyst

Progress on the antiferromagnetic topological insulator MnBi2te4

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National Science Review 2024年第2期11卷 33-49页

作者： Shuai Li tianyu Liu chang Liu Yayu Wang Hai-Zhou Lu X.c.Xie Department of Physics Harbin Institute of Technology Shenzhen Institute for Quantum Science and Engineering and Department of Physics Southern University of Science and Technology(SUSTech) Quantum Science center of Guangdong-Hong Kong-Macao Greater Bay Area(Guangdong) Shenzhen Key Laboratory of Quantum Science and Engineering International Quantum Academy Beijing Academy of Quantum Information Sciences Beijing Key Laboratory of Optoelectronic Functional Materials&Micro-Nano Devices Department of Physics Renmin University of China State Key Laboratory of Low Dimensional Quantum Physics Department of PhysicsTsinghua University Frontier Science center for Quantum Information Hefei National Laboratory International center for Quantum Materials School of Physics Peking University Institute for Nanoelectronic Devices and Quantum computing Fudan University

topological materials, which feature robust surface and/or edge states, have now been a research focus in condensed mather physics. they represent a new class of materials exhibiting nontrivial topological phases,and provide a platform for exploring exotic transport phenomena, such as the quantum anomalous Hall effect and the quantum spin Hall effect. Recently, magnetic topological materials have attracted considerable interests due to the possibility to study the interplay between topological and magnetic *** particular, the quantum anomalous Hall and axion insulator phases can be realized in topological insulators with magnetic order. MnBi2te4, as the first intrinsic antiferromagnetic topological insulator discovered, allows the examination of existing theoretical predictions; it has been extensively studied, and many new discoveries have been made. Here we review the progress made on MnBi2te4from both experimental and theoretical aspects. the bulk crystal and magnetic structures are surveyed first, followed by a review of theoretical calculations and experimental probes on the band structure and surface states, and a discussion of various exotic phases that can be realized in MnBi2te4. the properties of MnBi2te4thin films and the corresponding transport studies are then reviewed, with an emphasis on the edge state transport. Possible future research directions in this field are also discussed.

关键词： MnBi2te4 magnetic topological insulator antiferromagnetic quantum anomalous Hall effect axion insulator

Effect of heat treatment on microstructure and mechanical properties of selective laser-melted PH13-8Mo stainless steel

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Journal of Iron and Steel Research International 2024年第4期31卷 945-955页

作者： Yuan Zhang Xiang Liu chang-jun Wang chang Liu School of Material Science and Engineering Kunming University of Science and TechnologyKunming 650093YunnanChina central Iron&Steel Research Institute co. Ltd.Beijing 100081China

PH13-8Mo stainless steel powder with high sphericity and well fluidity was prepared by the plasma rotating electrode *** formed parts with ultra-high purity were manufactured by selective laser *** tensile and impact mechanical properties of the printed parts under three heat treatment regimes were compared to those without heat *** microstructure,grain orientation and phase composition were characterized by electron-backscatter diffraction,X-ray diffraction and transmission electron *** characterization results reveal that the addition of heat treatment makes the grains enlarge,and after different heat treatments,the average grain size from 1.51μm in the printed state increases to 2.78,3.09 and 2.06μm,*** formed parts are mainly composed of martensite and retained ***,the NiAl and M23c precipitates form,which are the major strengthening phases of PH13-8Mo stainless *** optimal heat treatment process is 925℃×1 h water cooling(Wc)+0℃×2 h air cooling(Ac)+540℃×4 h *** this heat treatment process,PH13-8Mo formed parts have the optimal comprehensive mechanical properties:the tensile strength,yield strength and impact energy KU2 are 1492 MPa,1432 MPa and 63 J,*** strengthening and toughening via heat treatment are mainly attributed to dislocation strengthening,the formation of NiAl and M23co precipitates and the change of volume fraction of the retained austenite.

关键词： High-strength stainless steel-Selective laser melting-Heat treatment Microstructure Mechanical property

Inverse-time Backup Protection Based on Unified characteristic Equation for Distribution Networks with High Proportion of Distributed Generations

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Journal of Modern Power Systems and clean Energy 2024年第1期12卷 202-212页

作者： Nana chang Guobing Song Zhongxue chang Yuping Zheng Xingang Yang the School of Electrical Engineering Xi’an Jiaotong UniversityXi’anChina State Key Laboratory of Smart Grid Protection and control NARI Group CorporationNanjingChina Electric Power Research Institute of State Grid Shanghai Electric Power company ShanghaiChina

the setting work of backup protection using steady-state current is tedious,and mismatches occasionally occur due to the increased proportion of distributed generations(DGs)connected to the power ***,there is a practical need to study a backup protection technology that does not require step-by-step setting and can be adaptively *** paper proposes an action sequence adaptive to fault positions that uses only positive sequence fault component(PSFc)*** the influence of DGs,the unified time dial setting can be obtained by selecting specific *** protection performance is improved by using the adjacent upstream and downstream protections to meet the coordination time interval in the case of metallic faults at the near-and far-ends of the ***,the expression and implementation scheme for inverse-time backup protection(ItBP)based on the unified characteristic equation is *** results show that this scheme can adapt to DG penetration scenarios and can realize the adaptive coordination of multi-level relays.

关键词： Inverse-time backup protection(ItBP) distributed generation(DG) positive sequence fault component(PSFc)voltage unified characteristic equation adaptive coordination

Polymeric piezoelectric accelerometers with high sensitivity,broad bandwidth,and low noise density for organic electronics and wearable microsystems

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Microsystems & Nanoengineering 2024年第3期10卷 63-74页

作者： chang Ge Edmond cretu the Department of Electrical and computer Engineering The University of British ColumbiaVancouverBCCanada

Piezoelectric accelerometers excel in vibration *** the emerging trend of fully organic electronic microsystems,polymeric piezoelectric accelerometers can be used as vital front-end components to capture dynamic signals,such as vocal vibrations in wearable speaking assistants for those with speaking ***,high-performance polymeric piezoelectric accelerometers suitable for such applications are *** organic compounds such as PVDF have inferior properties to their inorganic counterparts such as ***,most existing polymeric piezoelectric accelerometers have very unbalanced performance *** often sacrifice resonance frequency and bandwidth for a flat-band sensitivity comparable to those of PZt-based accelerometers,leading to increased noise density and limited application *** this study,a new polymeric piezoelectric accelerometer design to overcome the material limitations of PVDF is *** new design aims to simultaneously achieve high sensitivity,broad bandwidth,and low *** samples were manufactured and characterized,demonstrating an average sensitivity of 29.45 pc/g within a±10 g input range,a 5%flat band of 160 Hz,and an in-band noise density of 1.4μg/√*** results surpass those of many PZt-based piezoelectric accelerometers,showing the feasibility of achieving comprehensively high performance in polymeric piezoelectric accelerometers to increase their potential in novel applications such as organic microsystems.

关键词： piezoelectric polymeric overcome

Recent Progresses of the DAMPE Mission

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空间科学学报 2024年第4期44卷 633-642页

作者： chang Jin Key Laboratory of Dark Matter and Space Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210033 School of Astronomy and Space Science University of Science and Technology of ChinaHefei 230026

the DArk Matter Particle Explorer(DAMPE)is a space high-energy particle andγ-ray detector whose major scientific goals are the indirect detection of dark matter particles,the origin of cosmic rays and highenergyγ-ray *** its successful launch in December 2015,the DAMPE has been operated smoothly in orbit for more than 8 *** direct measurements of the boron-to-carbon and boron-to-oxygen flux ratios,and the proton+Helium spectrum up to 316 teV have been obtained,revealing new spectral features with very high *** search results ofγ-ray spectral line and fractionally charged particles indicate a good potential of DAMPE for indirect dark matter detection and new physical discovery in *** DAMPE measurements are expected to significantly advance our understanding of the fundamental problems in astroparticle physics.

关键词： DAMPE Dark matter Indirect detection cosmic rays