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Van der Waals materials-based floating gate memory for neuromorphic computing

Chip 2023年第4期2卷 27-44页

作者： Qianyu Zhang Zirui Zhang Ce Li renjing xu Dongliang Yang Linfeng Sun Centre for Quantum Physics Key Laboratory of Advanced Optoelectronic Quan-tum Architecture and Measurement(MOE)School of PhysicsBeijing Institute of TechnologyBeijing 100081China Beijing Key Lab of Nanophotonics&Ultra-fine Optoelectronic Systems School of PhysicsBeijing Institute of TechnologyBeijing 100081China Thrust of Microelectronics of Function Hub The Hong Kong University of Science and Technology(Guangzhou)Guangzhou 511400China

With the advent of the“Big Data Era”,improving data storage density and computation speed has become more and more urgent due to the rapid growth in different types of *** memory with a floating gate(FG)structure is attracting great attention owing to its advantages of miniaturization,low power consumption and reli-able data storage,which is very effective in solving the problems of large data capacity and high integration ***,the FG memory with charge storage principle can simulate synaptic plasticity perfectly,breaking the traditional von Neumann computing ar-chitecture and can be used as an artificial synapse for neuromorphic computations inspired by the human *** many candidate materials for manufacturing devices,van der Waals(vdW)materials have attracted widespread attention due to their atomic thickness,high mobility,and sustainable miniaturization *** to the arbitrary stacking ability,vdW heterostructure combines rich physics and potential 3D integration,opening up various possibilities for new functional integrated devices with low power consumption and flexible *** paper provides a comprehensive review of memory devices based on vdW materials with FG structure,including the working principles and typical structures of FG structure devices,with a focus on the introduction of various highperformance FG memories and their versatile applications in neuro-morphic ***,the challenges of neuromorphic devices based on FG structures are also *** review will shed light on the design and fabrication of vdW material-based memory devices with FG engineering,helping to promote the development of practical and promising neuromorphic computing.

关键词： Van der Waals materials Floating gate memory Memristor Neuromorphic computing

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Structural plasticity-based hydrogel optical Willshaw model for one-shot on-the-fly edge learning

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InfoMat 2023年第4期5卷 48-59页

作者： Dingchen Wang Dingyao Liu Yinan Lin Anran Yuan Woyu Zhang Yaping Zhao Shaocong Wang Xi Chen Hegan Chen Yi Zhang Yang Jiang Shuhui Shi Kam Chi Loong Jia Chen Songrui Wei Qing Wang Hongyu Yu renjing xu Dashan Shang Han Zhang Shiming Zhang Zhongrui Wang Department of Electrical and Electronic Engineering The University of Hong KongHong Kongthe People's Republic of China ACCESS-AI Chip Center for Emerging Smart Systems InnoHK CentersHong Kong Science ParkHong Kongthe People's Republic of China School of Computer Science and Engineering Faculty of Innovation EngineeringMacao University of Science and TechnologyMacaothe People's Republic of China Key Laboratory of Microelectronics Devices and Integrated Technology Institute of MicroelectronicsChinese Academy of SciencesBeijingthe People's Republic of China Collaborative Innovation Center for Optoelectronic Science Technology International Collaborative Laboratory of 2D Materials for OptoelectronicsScience and Technology of Ministry of EducationInstitute of Microscale OptoelectronicsShenzhen UniversityShenzhenthe People's Republic of China School of Microelectronics Southern University of Science and TechnologyShenzhenthe People's Republic of China Microelectronics Thrust Function Hub of the Hong Kong University of Science and Technology(Guangzhou)Guagndongthe People's Republic of China

Autonomous one-shot on-the-fly learning copes with the high privacy,small dataset,and in-stream data at the *** such learning on digital hardware suffers from the well-known von-Neumann and scaling *** optical neural networks featuring large parallelism,low latency,and high efficiency offer a promising ***,ex-situ training of conventional optical networks,where optical path configuration and deep learning model optimization are separated,incurs hardware,energy and time overheads,and defeats the advantages in edge ***,we introduced a bio-inspired material-algorithm co-design to construct a hydrogel-based optical Willshaw model(HOWM),manifesting Hebbian-rule-based structural plasticity for simultaneous optical path configuration and deep learning model optimization thanks to the underlying opto-chemical *** first employed the HOWM as an all optical in-sensor AI processor for one-shot pattern classification,association and *** then leveraged HOWM to function as a ternary content addressable memory(TCAM)of an optical memory augmented neural network(MANN)for one-shot learning the Omniglot *** HOWM empowered one-shot on-the-fly edge learning leads to 1000boost of energy efficiency and 10boost of speed,which paves the way for the next-generation autonomous,efficient,and affordable smart edge systems.

关键词： associative memory hydrogel one-shot learning optical neural network structural plasticity Willshaw model

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Atomically thin optical lenses and gratings

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Light(Science & Applications) 2016年第1期5卷 562-569页

作者： Jiong Yang Zhu Wang Fan Wang renjing xu Jin Tao Shuang Zhang Qinghua Qin Barry Luther-Davies Chennupati Jagadish Zongfu Yu Yuerui Lu Research School of Engineering College of Engineering and Computer Sciencethe Australian National UniversityCanberraACT 2601Australia Department of Electrical and Computer Engineering University of WisconsinMadisonWI 53706USA Department of Electronic Materials Engineering Research School of Physics and Engineeringthe Australian National UniversityCanberraACT 2601Australia CUDOS Laser Physics CentreResearch School of Physics and Engineeringthe Australian National UniversityCanberraACT 2601Australia

Two-dimensional(2D)materials have emerged as promising candidates for miniaturized optoelectronic devices due to their strong inelastic interactions with *** the other hand,a miniaturized optical system also requires strong elastic light–matter interactions to control the flow of *** we report that a single-layer molybdenum disulfide(MoS2)has a giant optical path length(OPL),around one order of magnitude larger than that from a single-layer of *** such giant OPL to engineer the phase front of optical beams we have demonstrated,to the best of our knowledge,the world’s thinnest optical lens consisting of a few layers of MoS2 less than 6.3 nm *** taking advantage of the giant elastic scattering efficiency in ultra-thin high-index 2D materials,we also demonstrated high-efficiency gratings based on a single-or few-layers of *** capability of manipulating the flow of light in 2D materials opens an exciting avenue towards unprecedented miniaturization of optical components and the integration of advanced optical *** importantly,the unique and large tunability of the refractive index by electric field in layered MoS2 will enable various applications in electrically tunable atomically thin optical components,such as micro-lenses with electrically tunable focal lengths,electrical tunable phase shifters with ultra-high accuracy,which cannot be realized by conventional bulk solids.

关键词： atomically thin grating micro-lens MoS2 two-dimensional

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适用于多种一次调频技术及工况变化的抽汽凝汽式汽轮机数学模型

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中国电机工程学报 2024年第15期44卷 6065-6077,I0019页

作者：黄怡涵郝玲陈磊徐飞徐达睿孙国辉姜楠程仁静新型电力系统运行与控制全国重点实验室(清华大学电机工程与应用电子技术系) 北京市海淀区100084 华能伊敏电厂内蒙古自治区呼伦贝尔市021134

火电机组是目前电力系统中重要的调频资源,其一次调频能力与汽轮机动态密切相关,但现有汽轮机动态数学模型无法准确反映火电机组在多种一次调频技术以及工况变化情况下的一次调频能力。为准确描述火电机组真实的一次调频动态,该文对汽... 详细信息

火电机组是目前电力系统中重要的调频资源,其一次调频能力与汽轮机动态密切相关,但现有汽轮机动态数学模型无法准确反映火电机组在多种一次调频技术以及工况变化情况下的一次调频能力。为准确描述火电机组真实的一次调频动态,该文对汽轮机本体、回热抽汽管道及回热加热器的动态耦合特性进行机理分析,建立适用于主汽阀调节、凝结水节流和高加给水旁路调频技术的汽轮机动态模型;基于机组结构数据及分布式控制系统实测数据,提出跟随工况变化的模型参数在线确定方法;最后,以实际600MW机组为例进行模型验证与仿真分析。结果表明,汽轮机输出功率会受到汽轮机本体和回热系统动态耦合特性的重要影响,且不同工况下机组一次调频能力存在明显差异。该文模型能更准确地描述不同一次调频技术方案及不同运行工况下汽轮机的动态响应特性。

关键词：汽轮机动态模型一次调频回热系统凝结水节流高加给水旁路

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体外循环下冠状动脉旁路移植手术早期呼吸力学变化

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华中科技大学学报（医学版） 2007年第4期36卷 531-533页

作者：许仁镜孙宗全华中科技大学同济医学院附属协和医院心血管外科武汉430022

目的研究体外循环(cardiopulmonary bypass,CPB)下冠状动脉旁路移植手术(coronary artery bypass graft-ing,CABG)早期呼吸力学指标的变化。方法以25例全身麻醉、中低温CPB下行单纯CABG术患者为研究对象。测定开胸前、转流前、转流后、... 详细信息

目的研究体外循环(cardiopulmonary bypass,CPB)下冠状动脉旁路移植手术(coronary artery bypass graft-ing,CABG)早期呼吸力学指标的变化。方法以25例全身麻醉、中低温CPB下行单纯CABG术患者为研究对象。测定开胸前、转流前、转流后、关胸后气道峰压、气道阻力及胸肺顺应性等呼吸力学指标。转流前后血气分析,计算肺泡-动脉氧压差(alveolar-arterial oxygen difference,A-aDO2)。结果CPB前后相比,气道峰压[从(16.9±2.8)cmH2O到(17.6±2.7)cmH2O,P<0.01,1 cmH2O=0.098 kPa]及气道阻力[从(7.8±1.6)cmH2O/(L.s)到(8.5±1.7)cmH2O/(L.s),P<0.01]明显升高,胸肺顺应性[从(64.9±7.3)ml/cmH2O到(62.1±6.9)ml/cmH2O,P<0.01]明显降低。A-aDO2在CPB后明显升高,从(159.2±61.0)mmHg到(203.5±25.4)mmHg(P<0.05,1 mmHg=0.133 kPa)。关胸后呼吸力学指标与开胸前相比都有明显的变化,胸肺顺应性降低18%(P<0.01),气道峰压及气道阻力分别升高5%(P<0.01)及10%(P<0.01)。转流时间与CPB前后的A-aDO2的变化率呈正相关关系(r=0.63,P<0.01)。结论CPB下CABG时开胸及体外循环影响早期呼吸力学的变化,而且CPB时间与肺换气功能损伤程度有密切关系。

关键词：冠状动脉旁路移植术体外循环胸肺顺应性

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基于核酸等温扩增与侧向层析试纸联用鉴定黑胡椒调味品的真实性

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分析试验室 2024年第2期43卷 282-287页

作者：王仁静吴倩彭育勃薛鹏鹏陈伟姚帮本徐建国合肥工业大学食品与生物工程学院合肥230000 安徽省产品质量监督检验研究院合肥230000 嘉兴大学化学与生物工程学院嘉兴314001

本研究以黑胡椒中木瓜籽掺假为代表性研究对象,开发了一种分子扩增与侧向流动层析(LFA)联用方法,通过整合重组酶聚合酶链式扩增反应(RPA)和LFA技术,实现了对黑胡椒样品中木瓜籽掺假的敏感快速检测。该方法的检出限(LOD)为0.1%,整个检测... 详细信息

本研究以黑胡椒中木瓜籽掺假为代表性研究对象,开发了一种分子扩增与侧向流动层析(LFA)联用方法,通过整合重组酶聚合酶链式扩增反应(RPA)和LFA技术,实现了对黑胡椒样品中木瓜籽掺假的敏感快速检测。该方法的检出限(LOD)为0.1%,整个检测过程可以在40 min内完成,适用于现场测试,并成功用于鉴定香料黑胡椒的真实性。

关键词：等温扩增侧向层析试纸真实性鉴定

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香辛料SYBR GREENⅠ染料实时聚合酶链式反应检测方法的建立及应用

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食品科学 2024年第12期45卷 269-275页

作者：杨晴丽王仁静张茹孟宪卓姚帮本陈赵然张旭方建军陈伟合肥工业大学食品与生物工程学院安徽合肥230601 安徽省产品质量监督检验研究院安徽合肥230051 衢州市食品药品检验研究院浙江衢州324000

目的:本研究致力于建立香辛料真实性成分的分子鉴定方法,为香辛料的掺假提供有效的鉴定和检测方法,在不同的使用条件下分别实现定性或半定量分析,为建立相关标准提供一定的基础技术支撑。方法:研究采用SYBR GREENⅠ染料实时聚合酶链式反... 详细信息

目的:本研究致力于建立香辛料真实性成分的分子鉴定方法,为香辛料的掺假提供有效的鉴定和检测方法,在不同的使用条件下分别实现定性或半定量分析,为建立相关标准提供一定的基础技术支撑。方法:研究采用SYBR GREENⅠ染料实时聚合酶链式反应(polymerase chain reaction,PCR)方法,通过设计特异性引物成功建立了特异性检测八角、茴香、胡椒和花椒的分析技术。结果:该方法能够特异性检测出八角、茴香、胡椒、花椒,Ct值在标准品体积分数0.001%~10%范围内线性关系良好。针对八角标准品,检测限为1%;针对茴香、花椒、胡椒标准品,最检测限均为0.001%。利用该方法对5份实际样本进行检测,分别在样本1中未检测出八角、茴香、胡椒、花椒;样本2、3、5中检测出八角、茴香、胡椒;样本4中检测出八角、茴香、胡椒、花椒。结论:本实验建立的SYBR GREENⅠ染料实时PCR方法灵敏度高、重复性好,可应用于实际样品的检测。

关键词：香辛料 SYBR GREENⅠ染料实时聚合酶链式反应检测

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溶胶-凝胶法制备高比表面积CeO_2-TiO_2催化剂及其在模拟烟气中脱除Hg^0的性能

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环境工程学报 2017年第10期11卷 5535-5542页

作者：乔仁静许琦陈凯歌唐喆韩粉女盐城工学院化学与生物工程学院盐城224051 江苏大学化学化工学院镇江212013

以CeO_2作为活性组分、TiO_2作为载体,并以十六烷基三甲基溴化铵(CTAB)为模板剂,采用溶胶-凝胶法制备出高比表面积CeO_2-TiO_2催化剂,通过XRD、BET、SEM和TEM对CeO_2-TiO_2催化剂进行表征,并研究了其在模拟燃煤烟气中Hg^0的氧化性能。... 详细信息

以CeO_2作为活性组分、TiO_2作为载体,并以十六烷基三甲基溴化铵(CTAB)为模板剂,采用溶胶-凝胶法制备出高比表面积CeO_2-TiO_2催化剂,通过XRD、BET、SEM和TEM对CeO_2-TiO_2催化剂进行表征,并研究了其在模拟燃煤烟气中Hg^0的氧化性能。结果表明:当反应温度为250℃时,通入4%O_2、0.001%HCl、0.03%NO以及0.04%SO_2后,CeO_2(0.4)-TiO_2催化剂的Hg^0氧化率最高为85%;烟气中的O_2、HCl和NO均能促进CeO_2(0.4)-TiO_2催化剂对Hg^0的氧化,当反应温度250℃时,通入4%O_2和0.001%~0.003%HCl,Hg^0氧化率稳定在98%左右,而通入4%O_2和0.03%NO后,Hg^0氧化率也能达到53%;在抗硫实验中,当仅通入0.04%SO_2,Hg^0氧化率仅有5%。当0.04%SO_2中添加4%O_2时,CeO_2(0.4)-TiO_2催化剂的Hg^0氧化率提高至62%。

关键词：溶胶-凝胶法 CeO2-TiO2催化剂 Hg0氧化率

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The Formation of Yanshanian Granitic Magma in Dabie Mountains:Dehydration or Aquifer Melting-with Tiantangzhai and Jiuzihe Granites as Examples

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Continental Dynamics 2001年第2期6卷 39-47页

作者： WANG Qiang, ZHAO Zhenhua, QIU Jiaxiang, WANG renjing, xu Jifeng Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou P.R.C 510640 China University of Geosciences, Wuhan, P.R.C 430074 Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou P.R.C 510640 China University of Geosciences Wuhan P.R.C 430074

There are large-areas of late Yanshanian granites in the Dabie Orogen, but the formation mode of the relevant granitic magma is still under discussion. Taking the typical Yanshanian granites in the North Dabie Block - The TG and JG as examples, the Writers endeavor to discuss contain aspects of the formation mode of the granitic magma by studying the characteristics of the chemical compositions of biotite and amphibole of the granites and petrological features of enclaves in the intrusions, in the light of recent results of experimental petrology on dehydration melting and aquifer melting. It is suggested that: (1) Some biotites in the Tiantangzhai and the JGs and their enclaves were residual minerals; (2) Some of the amphiboles could be new-born minerals, and others, residual ones. (3) the banded bodies in granites were residuals of anatexis. (4) The TG and JG were formed by aquifer melting, and the South Dabie Block could be the important source region of water.

关键词： petrogenesis of granite dehydration melting aquifer melting enclaves characteristics aquifer fluid the Dabie Orogen

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High-performance 800-1050 nm seed pulses based on spectral broadening and filtering for petawatt lasers

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High Power Laser Science and Engineering 2023年第1期11卷 61-66页

作者： Wenhai Liang renjing Chen Yilin xu Yaping xuan Peng Wang Jun Liu Ruxin Li State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghaiChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijingChina Zhangjiang Laboratory ShanghaiChina

High-performance 86μJ,11.2 fs pulses with a spectrum range of 800-1050 nm are generated based on 1030 nm,190 fs Yb femtosecond pulses by using multi-plate-based spectral broadening and *** advantage of single beam configuration,the obtained pulses have excellent power and spectral *** the output spectrum is obtained by spectrally filtering the broadened components,the temporal contrast of the output pulses is enhanced by at least four orders of *** with the robust and simple setup,the proposed method is expected to be a competitive option for the generation of seed pulses for 10s-100s petawatt lasers.

关键词： pulse compression seed pulse spectral broadening temporal contrast

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