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Bioinspired activation of silent synapses in layered materials for extensible neuromorphic computing

Journal of Materiomics 2023年第4期9卷 787-797页

作者： Yan Kang Yabo Chen Yinlong Tan Hao Hao Cheng Li xiangnan xie Weihong Hua Tian Jiang College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangsha410073China Institute for Quantum Information&State Key Laboratory of High Performance Computing College of ComputerNational University of Defense TechnologyChangsha410073China Institute for Quantum Science and Technology College of ScienceNational University of Defense TechnologyChangsha410073China

Activation of silent synapses is of great significance for the extension of neural plasticity related to learning and *** by the activation of silent synapses via receptor insertion in neural synapses,we propose an efficient method for activating artificial synapses through the intercalation of Sn in layered a-MoO_(3).Sn intercalation is capable of switching on the response of layered a-MoO_(3)to the stimuli of visible and near infrared light by decreasing the *** mimics the receptor insertion process in silent neural *** Sn-intercalated MoO_(3)(Sn-MoO_(3))exhibits persistent photoconductivity due to the donor impurity induced by Sn *** enables the two-terminal Sn-MoO_(3)device promising optoelectronic synapse with an ultrahigh paired pulse facilitation(PPF)up to 199.5%.On-demand activation and tunable synaptic plasticity endow the device great potentials for extensible neuromorphic *** performance of the extensible artificial neural network(ANN)based on the Sn-MoO_(3)synapses are demonstrated in pattern ***,the recognition accuracy increases from 89.7%to 94.8%by activating more nodes into the *** is consistent with the recognition process of physical neural network during brain *** intercalation engineering of MoO_(3)may provide inspirations for the design of high-performance neuromorphic computing architectures.

关键词： Activation of silent synapse Intercalation Layered materials Neuromorphic computing

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Helicity‐dependent THz emission induced by ultrafast spin photocurrent in nodal‐line semimetal candidate Mg3Bi2

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Opto-Electronic Advances 2020年第12期3卷 9-16页

作者： Mingyu Tong Yuze Hu xiangnan xie xiegang Zhu Zhenyu Wang Xiang'ai Cheng Tian Jiang College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangsha 410073China National Innovation Institute of Defense Technology Academy of Military Sciences PLA ChinaBeijing 100010China State Key Laboratory of High Performance Computing College of ComputerNational University of Defense TechnologyChangsha 410073China Beijing Academy of Quantum Information Sciences Beijing 100193China Science and Technology on Surface Physics and Chemistry Laboratory Jiangyou 621908China

Helicity-dependent ultrafast spin current generated by circularly polarized photons in topological materials holds the crux to many technological improvements,such as quantum communications,on-chip communication processing and ***,we present the manipulation of helicity-dependent terahertz emission generated in a nodal line semimetal candidate Mg3Bi2 by using photon polarization *** terahertz emission is mainly ascribed to the helicity-dependent photocurrent that is originated from circular photogalvanic effects,and the helicity-independent photocurrent that is attributed to linear photogalvanic *** work will inspire more explorations into novel nodal line semimetals and open up new opportunities for developing ultrafast optoelectronics in the topological system.

关键词： terahertz spin photocurrent nodal-line semimetal topological material

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Experimental Evidence of Topological Surface States in Mg3Bi2 Films Grown by Molecular Beam Epitaxy

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Chinese Physics Letters 2019年第11期36卷 65-69页

作者： Tong Zhou xie-Gang Zhu Mingyu Tong Yun Zhang Xue-Bing Luo xiangnan xie Wei Feng Qiuyun Chen Shiyong Tan Zhen-Yu Wang Tian Jiang Yuhua Tang Xin-Chun Lai Xuejun Yang State Key Laboratory of High Performance Computing College of ComputerNational University of Defense TechnologyChangsha 410073 Science and Technology on Surface Physics and Chemistry Laboratory Jiangyou 621908 National Innovation Institute of Defense Technology Academy of Military Sciences PLA ChinaBeijing 100010 Institute of Materials China Academy of Engineering PhysicsMianyang 621700 College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangsha 410073 Academy of Military Sciences PLA China Beijing 100010 Beijing Academy of Quantum Information Sciences Beijing 100084

Nodal line semimetal(NLS) is a new quantum state hosting one-dimensional closed loops formed by the crossing of two bands. The so-called type-Ⅱ NLS means that these two crossing bands have the same sign in their slopes along the radial direction of the loop, which requires that the crossing bands are either right-tilted or left-tilted at the same time. According to the theoretical prediction, Mg3Bi2 is an ideal candidate for studying the type-Ⅱ NLS by tuning its spin-orbit coupling(SOC). High-quality Mg3 Bi2 films are grown by molecular beam epitaxy(MBE). By in-situ angle resolved photoemission spectroscopy(ARPES), a pair of surface resonance bands around theГ point are clearly seen. This shows that Mg3Bi2 films grown by MBE are Mg(1)-terminated by comparing the ARPES spectra with the first principles calculations results. Moreover, the temperature dependent weak anti-localization effect in Mg3Bi2 films is observed under magneto-transport measurements, which shows clear two-dimensional(2 D) e-e scattering characteristics by fitting with the Hikami–Larkin–Nagaoka model. Therefore, by combining with ARPES, magneto-transport measurements and the first principles calculations, this work proves that Mg3Bi2 is a semimetal with topological surface states. This paves the way for Mg3Bi2 to be used as an ideal material platform to study the exotic features of type-Ⅱ nodal line semimetals and the topological phase transition by tuning its SOC.

关键词： bands topological terminated

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明代江南书香门第的信息行为研究

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图书馆 2016年第10期 39-45页

作者：胡德华屈湘南谢凯任晓磊中南大学信息安全与大数据研究院长沙410083 中南大学湘雅医学院长沙410013

以家族群体为基本单位的书香门第是明代江南地区重要的社会群体。明代江南书香门第普遍具有崇尚登第入仕、重视家庭教育、注重家族文化传承等特点。文章阐述了书香门第在科举应试教育、蒙学教育、女子教育以及家族刻书活动等方面的信息... 详细信息

以家族群体为基本单位的书香门第是明代江南地区重要的社会群体。明代江南书香门第普遍具有崇尚登第入仕、重视家庭教育、注重家族文化传承等特点。文章阐述了书香门第在科举应试教育、蒙学教育、女子教育以及家族刻书活动等方面的信息行为。

关键词：明代江南书香门第信息行为

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La3+掺杂Y2MnCrO6的结构、磁性和电输运性质研究

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低温物理学报 2015年第6期37卷 439-445页

作者：张忠峰郝林谢向男王昊儒朱弘中国科学技术大学物理系

本文采用传统固相反应法制备YLaMnCrO(y=0~0.4,0.9)系列多晶样品.低掺杂样品(y≤0.3)的XRD谱显示,随着La掺杂量的增加,即A位阳离子半径逐渐增大,样品的结构各向异性减小,体系的层状B位阳离子有序逐渐被抑制.同时,变温磁化曲线给出低掺... 详细信息

本文采用传统固相反应法制备YLaMnCrO(y=0~0.4,0.9)系列多晶样品.低掺杂样品(y≤0.3)的XRD谱显示,随着La掺杂量的增加,即A位阳离子半径逐渐增大,样品的结构各向异性减小,体系的层状B位阳离子有序逐渐被抑制.同时,变温磁化曲线给出低掺杂样品在75K以下表现为亚铁磁态,与YMnCrO母相化合物类似.当掺杂量为0.9时,样品的磁转变温度变高,大约为120K.而掺杂量在0.4~0.8之间,样品呈现低掺和高掺双相共存.通过仔细分析低掺杂亚铁磁样品的高温顺磁居里-外斯行为,发现随着La离子掺入,Cr次格子之间的反铁磁耦合作用显著提高,这对体系的亚铁磁性是一个不利因素.该系列样品的电输运性质主要由热激活机制主导,同时随着掺杂量y的增加(y≤0.3),样品的激活能明显减小.这些结果表明,随着A位离子平均半径的增加,YMnCrO氧化物中的亚铁磁性有被抑制的倾向.

关键词： A位离子半径 Cr掺杂锰氧化物亚铁磁性

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某民用飞机显示系统仿真器的设计与实现

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民用飞机设计与研究 2017年第2期 125-130页

作者：沈佳徐志鑫谢寒谢祥南上海航空无线电电子研究所上海200241

航电系统仿真平台以其灵活方便和低成本特点,支持综合航电系统的预先研究、方案设计、详细设计、系统综合,成为综合航电系统研制过程中不可或缺的设计手段。给出了IMA系统仿真平台显示系统仿真器的详细的设计和实现方案,首先介绍了IMA... 详细信息

航电系统仿真平台以其灵活方便和低成本特点,支持综合航电系统的预先研究、方案设计、详细设计、系统综合,成为综合航电系统研制过程中不可或缺的设计手段。给出了IMA系统仿真平台显示系统仿真器的详细的设计和实现方案,首先介绍了IMA系统仿真平台的组成,接着介绍了显示系统仿真器的组成架构,并对显示系统仿真器的硬件配置、航电网络配置、人机交互界面和逻辑处理进行了详细的介绍。最后经过IMA系统仿真试验样件验收测试程序的测试,验证了显示系统仿真器满足验收测试程序的各项功能和性能要求,满足了该型号显示系统仿真器的试验要求。

关键词：民用飞机 IMA系统显示系统仿真器航电网络人机交互

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质量法低温液体流量测量系统换向技术研究与应用

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低温与超导 2024年第7期52卷 53-59页

作者：熊茂涛甘蓉罗凡谢湘南罗雁飞路炜李怡希中国测试技术研究院成都610021

低温液体的特殊物理性质使其极易气化,准确计量其质量流量是技术难题。本文针对低温液体流量测量系统的应用,提出一种尽可能减少低温液体气化情况下实现流量准确计量的测试方法,设计出一套高压气体驱动的低温快速换向装置,并以液氮为试... 详细信息

低温液体的特殊物理性质使其极易气化,准确计量其质量流量是技术难题。本文针对低温液体流量测量系统的应用,提出一种尽可能减少低温液体气化情况下实现流量准确计量的测试方法,设计出一套高压气体驱动的低温快速换向装置,并以液氮为试验介质对该方法和换向装置进行验证试验,证明了用于测试低温液体的有效性,同时提出了用于低温液体准确计量的改进措施,为进一步应用质量法低温液体流量测量系统对多种类型流量计进行性能测试提供了方法和技术手段。

关键词：低温液体流量测量系统质量法换向装置计量性能

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基于I~2C总线的数字示波器存储设计

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现代科学仪器 2009年第1期 34-36页

作者：滕志超谢湘南田书林电子科技大学自动化工程学院中国测试技术研究院

描述了基于I~2C的数字示波器的存储设计,该设计是利用I~2C芯片FM24CL04中的部分存储单元,作为在flash中存储索引值,从而实现波形数据和设置数据的存储,回调以及废弃数据的垃圾回收。本论文首先介绍了一下I~2C协议和芯片的相关信息,接着... 详细信息

描述了基于I~2C的数字示波器的存储设计,该设计是利用I~2C芯片FM24CL04中的部分存储单元,作为在flash中存储索引值,从而实现波形数据和设置数据的存储,回调以及废弃数据的垃圾回收。本论文首先介绍了一下I~2C协议和芯片的相关信息,接着利用表格的方式给出实现这一过程的详细流程,对于垃圾回收,给出了源代码,并对使用的结果进行了评价。

关键词： I~2C 存储数字示波器

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Graph convolution machine for context-aware recommender system

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Frontiers of Computer Science 2022年第6期16卷 81-92页

作者： Jiancan WU xiangnan HE Xiang WANG Qifan WANG Weijian CHEN Jianxun LIAN Xing xie School of Information Science and Technology University of Science and Technology of ChinaHefei230026China National University of Singapore 5 Prince George’s ParkSingapore118404Singapore Google Research Mountain ViewCA94043USA Microsoft Research Asia Beijing100190China

The latest advance in recommendation shows that better user and item representations can be learned via performing graph convolutions on the user-item interaction ***,such finding is mostly restricted to the collaborative filtering(CF)scenario,where the interaction contexts are not *** this work,we extend the advantages of graph convolutions to context-aware recommender system(CARS,which represents a generic type of models that can handle various side information).We propose Graph Convolution Machine(GCM),an end-to-end framework that consists of three components:an encoder,graph convolution(GC)layers,and a *** encoder projects users,items,and contexts into embedding vectors,which are passed to the GC layers that refine user and item embeddings with context-aware graph convolutions on the user-item *** decoder digests the refined embeddings to output the prediction score by considering the interactions among user,item,and context *** conduct experiments on three real-world datasets from Yelp and Amazon,validating the effectiveness of GCM and the benefits of performing graph convolutions for CARS.

关键词： context-aware recommender systems graph convolution

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Liberation characteristics of coal middlings comminuted by jaw crusher and ball mill

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International Journal of Mining Science and Technology 2013年第5期23卷 669-674页

作者： xie Weining He Yaqun Zhu xiangnan Ge Linhan Huang Yajun Wang Haifeng School of Chemical Engineering and Technology China University of Mining & Technology Advanced Analysis & Computation Center China University of Mining & Technology

The associated minerals make coal middlings possess a relatively high ash *** liberation through size reduction can cause recovery ***,effect of comminution facilities on mineral liberation of middlings was *** paper studied the liberation characteristics of middlings crushed with different kinds of fragmentation *** of 3 mm+0.5 mm sampled from a dense medium cyclone were comminuted by a jaw crusher and a ball mill to 0.5 mm with similar size distribution *** generating mechanism of fnes was also *** densimetric analyses indicate that mineral liberation of the product crushed by the jaw crusher is better than that by the ball mill at each *** sizes of 0.125 mm+0.074 mm and 0.074 mm,yields of the product with ash content 11%comminuted by jaw crusher are nearly 20%higher than that by the ball *** micrographs observed by the scanning electron microscopy(SEM)also show the same law for these two fractions and some intergrowth particles still exist in the fraction of 0.5 mm+0.25 mm.

关键词： Coal middlings Fragmentation force Liberation Float and sink test Sectional micrograph

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