检索结果-南通市图书馆

Polarization-encoded neural networks with simplified grating patch

Science China(Technological Sciences) 2025年第2期68卷 269-277页

作者： Chengyan ZHONG Xiang WANG Lingfei LI Yuanchi CUI Lei XIAO Dawei SONG Junxiong guo Wen HUANG yufeng guo Yu LIU College of Integrated Circuit Science and Engineering Nanjing University of Posts and TelecommunicationsNanjing 210023China National and Local Joint Engineering Laboratory of RF Integration and Micro-Assembly Technology Nanjing 210023China College of Integrated Circuits Hangzhou Global Scientific and Technological Innovation Centre Zhejiang UniversityHangzhou 310027China Nanjing Mumusili Technology Co. LTDNanjing 211100China School of Integrated Circuits Tsinghua UniversityBeijing 100084China Institute of Advanced Study School of Electronic Information and Electrical EngineeringChengdu UniversityChengdu 610106China State Key Laboratory of Electronic Thin Films and Integrated Devices School of Integrated Circuit Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengdu 610054China

Optical neural networks(ONNs)offer a promising solution for high-performance,energy-efficient artificial intelligence hardware by leveraging the parallelism and speed of ***,the large-scale implementation of ONNs remains challenging due to the bulky footprint and complex control of optical *** this work,we propose and simulate a plasmonic polarized synaptic architecture that overcomes the diffraction limit and enables ultra-compact *** tuning the polarization state of incident light,the optical transmittance through each plasmonic unit can be dynamically adjusted to represent a synaptic *** plasmonic structures,with features as small as 40 nm,operate well below this limit in the visible spectrum(400-750 nm).Compared with diffraction and interference-based circuit designs,our proposed method achieves a substantial reduction in synaptic density by factors of 150000-fold and 1500-fold,***,we successfully demonstrate a proof-of-concept plasmonic ONN applied to the Canadian Institute for Advanced Research—10 classes(CIFAR-10)dataset using a Visual Geometry Group network with 16 layers(VGG16)*** training for 80 epochs,the network achieves an accuracy of 93%.The polarization-tunable plasmonics paves the way towards scalable ONNs for next-generation artificial intelligence(AI)accelerators and smart sensors.

关键词： optical neural networks polarization dependent nanophotonic ultra-compact devices diffraction limit

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

空间观念素养的培养路径及展望

引用

课程.教材.教法 2025年第1期45卷 100-107页

作者：郭玉峰王伊阳何泉蓉北京师范大学数学科学学院北京100875

如何理解和落实数学核心素养,关系到核心素养引领的基础教育数学课程改革的成效。发展学生的空间观念素养,需要关注“观念”内涵的概念属性及其综合属性,关注空间观念素养的空间结构认知导向及其与数学审美、好奇心、想象力等相关的情... 详细信息

如何理解和落实数学核心素养,关系到核心素养引领的基础教育数学课程改革的成效。发展学生的空间观念素养,需要关注“观念”内涵的概念属性及其综合属性,关注空间观念素养的空间结构认知导向及其与数学审美、好奇心、想象力等相关的情感体验,关注空间观念素养发展的进阶性特征。空间观念素养培养的实现路径包括:基于概念和性质,实现二维与三维图形的相互转化;基于长度和角度,想象和表达物体的空间方位和相互位置关系;基于图形的运动变换规律,感悟图形的维度属性,数形结合解决问题。

关键词：空间观念数学核心素养转化进阶性特征

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Current situation and development trend of titanium metal industry in China

引用

International Journal of Minerals,Metallurgy and Materials 2022年第4期29卷 599-610页

作者： Guanzhou Qiu yufeng guo School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083China

Titanium metal and alloy are key materials for technological development,which significantly promote the development of the hightech economy in *** consumption of high-end titanium materials and the developmental level of the titanium industry are important indexes of a country’s comprehensive ***,at present,the application amount and level of high-end titanium materials in China are limited by many factors,including the dependence of raw materials on imports,high processing cost,and structural imbalance of *** on the characteristics of titanium resources and the current situation of the titanium industry,the whole titanium industrial chain in China should be *** the quality of raw materials is important to produce low-cost,high-end titanium materials using titanium resources with high calcium and magnesium contents in the Panxi *** addition,the steel-titanium joint production is a vital step to reduce the processing cost of titanium ***,the consumption structure of titanium materials should be completed to expand their *** implementing these suggestions,the overall level of China’s titanium industry will be greatly improved,thereby rapidly establishing an advanced scientific and technological country.

关键词： titanium titanium resources prodcution cost high-end titanium material steel-titanium joint prodcution

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Ion-Induced Friction Reduction in Water Nanoflow over Graphene

引用

Acta Mechanica Solida Sinica 2023年第2期36卷 214-220页

作者： Yue Wang yufeng guo Wanlin guo State Key Laboratory of Mechanics and Control of Mechanical Structures MOE Key Laboratory for Intelligent Nano Materials and DevicesCollege of Aerospace EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016China

Our extensive nonequilibrium and equilibrium molecular dynamics simulations reveal the ion-induced interfacial friction reduction of NaCl-containing water nanoflow over *** under a normal pressure,with the increase in ion concentration,the friction coefficients of water nanoflow at the water/graphene interfaces decrease,and the slip lengths and shear viscosities of water nanoflow *** interfacial friction reduction with the increase in ion concentration is mainly attributed to the decrease in interfacial hydrated ions and the weaker binding of water molecules with graphene at a higher ion *** presence of ions changes the hydrogen bond networks and structural configuration of water molecules close to the underlying graphene sheets and plays a key role in reducing the interfacial friction between water nanoflow and graphene.

关键词： Water nanoflow Ion Friction reduction Molecular dynamics

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Electro-lubrication in Janus transition metal dichalcogenide bilayers

引用

Friction 2022年第11期10卷 1851-1858页

作者： Hao LI yufeng guo Wanlin guo State Key Laboratory of Mechanics and Control of Mechanical Structures MOE Key Laboratory for Intelligent Nano Materials and DevicesCollege of Aerospace EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016China

Lubrication induced by a vertical electric field or bias voltage is typically not applicable to twodimensional(2D)van der Waals(vdW)*** performing extensive first-principles calculations,we reveal that the interlayer friction and shear resistance of Janus transition metal dichalcogenide(TMD)MoXY(X/Y=S,Se,or Te,and X≠Y)bilayers under a constant normal force mode can be reduced by applying vertical electric *** maximum interlayer sliding energy barriers between AA and AB stacking of bilayers MoSTe,MoSeTe,and MoSSe decrease as the positive electric field increases because of the more significant counteracting effect from the electric field energy and the more significant enhancement in interlayer charge transfer in AA ***,the presence of negative electric fields decreases the interlayer friction of bilayer MoSTe,because the electronegativity difference between Te and S atoms reduces the interfacial atom charge differences between AA and AB *** results reveal an electro-lubrication mechanism for the heterogeneous interfaces of 2D Janus TMDs.

关键词： Janus transition metal dichalcogenide(TMD) electro-lubrication electric field tuning first-principles calculations

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Ultralow friction of ion-containing water nanodroplets

引用

Nano Research 2023年第1期16卷 1792-1797页

作者： Jie Tan yufeng guo Wanlin guo State Key Laboratory of Mechanics and Control of Mechanical Structures MOE Key Laboratory for Intelligent Nano Materials and DevicesCollege of Aerospace EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016China

We reveal the ultralow friction or superlubricity of water nanodroplets containing cations and anions on graphene substrates at high ion concentration by molecular dynamics *** the ion concentration is higher than 7 wt.%and the nanodroplet diameter is larger than 10 nm,the friction coefficients of water nanodroplets are lower than 10−2,and can decrease to the order of 10−3 with increasing the ion concentration *** a certain ion concentration,the optimal nanodroplet diameter of 17–20 nm exists at which the friction coefficient is the *** ultralow friction behaviors of water nanodroplets containing cations and anions are mainly attributed to the opposite variation trends between the interfacial adhesion energy and surface energy of water nanodroplet with ion concentration,and the interfacial hydrophobicity sustained by high ion *** results unveil the essential role of ions in achieving the superlubricity of water nanodroplets.

关键词： water nanodroplet ion ultralow friction molecular dynamics

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Polarization-encoded neural networks with simplified grating patch

引用

Science China Technological Sciences 2025年第2期 273-281页

作者： Chengyan ZHONG Xiang WANG Lingfei LI Yuanchi CUI Lei XIAO Dawei SONG Junxiong guo Wen HUANG yufeng guo Yu LIU College of Integrated Circuit Science and Engineering Nanjing University of Posts and Telecommunications National and Local Joint Engineering Laboratory of RF Integration and Micro-Assembly Technology College of Integrated Circuits Hangzhou Global Scientific and Technological Innovation Centre Zhejiang University Nanjing Mumusili Technology Co. LTD School of Integrated Circuits Tsinghua University Institute of Advanced Study School of Electronic Information and Electrical Engineering Chengdu University State Key Laboratory of Electronic Thin Films and Integrated Devices School of Integrated Circuit Science and EngineeringUniversity of Electronic Science and Technology of China

Optical neural networks(ONNs) offer a promising solution for high-performance, energy-efficient artificial intelligence hardware by leveraging the parallelism and speed of light. However, the large-scale implementation of ONNs remains challenging due to the bulky footprint and complex control of optical synapses. In this work, we propose and simulate a plasmonic polarized synaptic architecture that overcomes the diffraction limit and enables ultra-compact ONNs. By tuning the polarization state of incident light, the optical transmittance through each plasmonic unit can be dynamically adjusted to represent a synaptic weight. Our plasmonic structures, with features as small as 40 nm, operate well below this limit in the visible spectrum(400–750 nm). Compared with diffraction and interference-based circuit designs, our proposed method achieves a substantial reduction in synaptic density by factors of 150000-fold and 1500-fold, respectively. Furthermore, we successfully demonstrate a proof-of-concept plasmonic ONN applied to the Canadian Institute for Advanced Research—10classes(CIFAR-10) dataset using a Visual Geometry Group network with 16 layers(VGG16) model. After training for 80epochs, the network achieves an accuracy of 93%. The polarization-tunable plasmonics paves the way towards scalable ONNs for next-generation artificial intelligence(AI) accelerators and smart sensors.

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Flexoelectricity enhanced water splitting and hydrogen evolution reaction on grain boundaries of monolayer transition metal dichalcogenides

引用

Nano Research 2022年第2期15卷 978-984页

作者： Mingjie Pu Dong Wang Zhuhua Zhang yufeng guo Wanlin guo State Key Laboratory of Mechanics and Control of Mechanical Structures and MOE Key Laboratory for Intelligent Nano Materials and Devices College of Aerospace EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016China

Our extensive first-principles calculations reveal that the chemical activities of monolayer transition metal dichalcogenides(TMDs)MX_(2)(M=Mo or W,and X=Te,Se,or S)for water splitting and hydrogen evolution are modified and promoted on their grain boundaries(GBs)when in-plane tensile loadings are *** with monolayer TMDs without GBs,the flexoelectricity induced by nonuniform deformation and strain gradient significantly enhances the charge polarizations of X and M atoms at the GB sites of monolayer TMDs,which facilitates the dissociation of water molecules on the GB sites and reduces the reaction barrier of hydrogen evolution *** energy barriers of splitting water molecules and hydrogen adsorption free energies on the GB sites decrease with increasing the flexoelectric *** results highlight an attractive way of utilizing the flexoelectric effect of GB-containing TMDs to improve their surface catalytic capability for hydrogen generation.

关键词： flexoelectricity transition metal dichalcogenides grain boundaries water splitting hydrogen evolution reaction

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

STRENGTH, PLASTICITY, INTERLAYER INTERACTIONS AND PHASE TRANSITION OF LOW-DIMENSIONAL NANOMATERIALS UNDER MULTIPLE FIELDS

引用

Acta Mechanica Solida Sinica 2012年第3期25卷 221-243页

作者： Wanlin guo yufeng guo Zhuhua Zhang Lifeng Wang (State Key Laboratory of Mechanics and Control of Mechanical Structures and Key Laboratory for Intelligent Nano Materials and Devices of MOE Institute of Nanoscience~Nanjing University of Aeronautics and AstronauticsNanjing 210016China)

Atoms are hold together to form different materials and devices through short range interactions such as chemical bonds and long range interactions such as the van der Waals force and electromagnetic interactions. Quantum mechanics is powerful to describe the short range interactions of materials at the nanometer scale, while molecular mechanics and dynamics based on empirical potentials are able to simulate material behaviors at much large scales, but weak in handling of processes including charge transfer and redistributions, such as mechanical-electric coupling of functional nanomaterials, plastic deformation~ fracture and phase transition of nano- materials. These issues are also challenging to quantum mechanics which needs to be extended to van der Waals distance and larger spatial as well as temporal scales. Here, we make brief review and discussions on such kind of mechanical behaviors of some important functional nanomaterials and nanostructures, to probe the frontier of nanomechanics and the trend to multiscale physical mechanics.

关键词： low-dimensional nanomaterials nano device physical mechanics multiple fieldcoupling multiscale

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

锂离子电池过充热失控特征和预警策略研究

引用

电源技术 2025年第1期49卷 132-138页

作者：王博涵刘勇郭宇峰王敏欣辛岳芃天津大学电气自动化与信息工程学院智能电网教育部重点实验室天津300072

随着全球对碳中和目标的追求,锂离子电池储能技术的发展前景广阔,而安全问题是制约锂离子电池储能电站发展的重要障碍。分析了不同充电倍率条件下磷酸铁锂电池的热失控动态特性及其影响因素。通过综合电压、温度和气体释放特征的协同分... 详细信息

随着全球对碳中和目标的追求,锂离子电池储能技术的发展前景广阔,而安全问题是制约锂离子电池储能电站发展的重要障碍。分析了不同充电倍率条件下磷酸铁锂电池的热失控动态特性及其影响因素。通过综合电压、温度和气体释放特征的协同分析,揭示了电池过充过程中的风险阶段及其安全阈值。采用云模型计算,建立了基于电压、温度和气体产生的多变量预警系统,通过基本概率分配(BPA)函数和mass函数来融合传感器数据,实现了磷酸铁锂电池过充危险等级的综合判断,为锂离子电池的安全监测和风险管理提供了切实可行的思路和技术支持。

关键词：锂离子电池热失控过充监测与预警

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：