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Growth and Structure of Sm on an Ultrathin Al2O3/Ni3Al(111) film:A Comprehensive Study

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Growth and Structure of Sm on an Ultrathin Al2O3/Ni3Al(111) ...

Constructing Donor–Acceptor‑Linked COfs Electrolytes to Regulate Electron Density and Accelerate the Li^(+)Migration in Quasi‑Solid‑State Battery

稀土催化在绿色能源和环境保护中的机遇——第十八届全国稀土催化学术会议

作者： Q.Xu,~1 S.Hu,~1 X.feng,~1 D.Chen,~1 j.f.zhu,~(1**) National Synchrotron Radiation Laboratory,University of Science and Technology of China. Hefei 230029,Peoples Republic of China.

The growth and electronic structure of vapor-deposited Sm onto a well-ordered AlO/NiAl(111) ultrathin film under ultrahigh vacuum(UHV) conditions at room-temperature has been studied comprehensively using X-ray photoelectron spectroscopy(XPS),ultraviolet photoelectron spectroscopy(UPS), scanning tunneling microscopy(STM) and low energy electron diffraction(LEED). Our results indicate that at room temperature Sm grows in a layer-by-layer fashion for the first two layers,followed by three-dimensional(3D) *** interaction of Sm with AlO thin films is so strong that deposited Sm is immediately oxidized at *** the oxidation states of Sm and Sm are found at low coverage (f Sm dominates below 0.2 ML and subsequently that of Sm *** increasing Sm coverage,the metallic state of Sm gradually *** the film of 0.2 ML Sm/AlO at Tfurther oxidation of the Sm species where all the Sm species converts to Sm,further annealing at higher temperatures leads to loss of Sm from the surface via subsurface diffusion.

关键词： Samarium Al2O3/Ni3Al(111) XPS UPS STM LEED

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Nano-Micro Letters 2025年第1期17卷 456-471页

作者： Genfu Zhao Hang Ma Conghui Zhang Yongxin Yang Shuyuan Yu Haiye zhu Yongjiang Sun Hong Guo School of Materials and Energy International Joint Research Center for Advanced Energy Materials of Yunnan ProvinceYunnan UniversityKunming 650091People’s Republic of China Yunnan Yuntianhua Co. LtdR&D CenterKunming 650228People’s Republic of China Southwest United Graduate School Kunming 650091People’s Republic of China

Regulation the electronic density of solid-state electrolyte by donor–acceptor(D–A)system can achieve highly-selective Li^(+)transportation and conduction in solid-state Li metal *** study reports a high-performance solid-state electrolyte thorough D–A-linked covalent organic frameworks(COfs)based on intramolecular charge transfer *** other reported COfbased solid-state electrolyte,the developed concept with D–A-linked COfs not only achieves electronic modulation to promote highly-selective Li^(+)migration and inhibit Li dendrite,but also offers a crucial opportunity to understand the role of electronic density in solid-state Li metal *** introduced strong electronegativity f-based ligand in COf electrolyte results in highlyselective Li^(+)(transference number 0.83),high ionic conductivity(6.7×10^(-4)S cm^(−1)),excellent cyclic ability(1000 h)in Li metal symmetric cell and high-capacity retention in Li/LifePO_(4)cell(90.8%for 300 cycles at 5C)than substituted C-and N-based *** is ascribed to outstanding D–A interaction between donor porphyrin and acceptor f atoms,which effectively expedites electron transferring from porphyrin to f-based ligand and enhances Li^(+)***,we anticipate that this work creates insight into the strategy for accelerating Li^(+)conduction in high-performance solid-state Li metal batteries through D–A system.

关键词： Electronic modulation engineering Donor-acceptor-linked covalent organic frameworks Quasi-solid-state Li metal battery

TESTING INEQUALITY CONSTRAINTS IN A LINEAR REGRESSION MODEL WITH SPHERICALLY SYMMETRIC DISTURBANCES

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journal of Systems Science & Complexity 2014年第6期27卷 1204-1212页

作者： zhu Rong ZHOU Sherry Z f Academy of Mathematics and Systems Science Chinese Academy of Sciences Department of Management Sciences City University of Hong Kong

This paper develops a Wald statistic for testing the validity of multivariate inequality constraints in linear regression models with spherically symmetric disturbances,and derive the distributions of the test statistic under null and nonnull *** power of the test is then *** evaluations are also carried out to examine the power performances of the test for the case in which errors follow a multivariate student-t(Mt) distribution.

关键词： Inequality constraint spherically symmetric distribution Wald test.

finite element simulation of elastoplastic fieldnear crack tips and results for a central crackedplate of le-lhp material under tension

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Acta Mechanica Sinica 2019年第4期35卷 828-838页

作者： X. ji f. zhu School of Aerospace Engineering and Applied Mechanics Tongji University Shanghai 200092 China

The elastoplastic field near crack tips is investigated through finite element simulation.A refined mesh model near the crack tip is proposed. In the mesh refining area, element size continuously varies from the nanometer scale to themicrometer scale and the millimeter scale. Graphics of the plastic zone, the crack tip blunting, and the deformed crack tip elements are given in the *** on the curves of stress and plastic strain, closely near the crack tip, the stresssingularity index and the stress intensity factor,as well as the plastic strain singularity index and the plastic strain intensity factor are *** and plastic strainsingular index vary with the load, while the dimensions of the stress and the plastic strain intensity factorsdependon the stress and the plastic strain singularity index, respectively. The singular field near the elastoplastic crack tip is characterized by the stress singularity index and the stress intensity factor, or alternativelythe plastic strain singularity index and the plastic strain *** the end of the paper, following Irwin’s concept of fracture mechanics,σδKσδKcriterion andεδQεδQcriterion are ***, crack tip angle criterion is also presented.

关键词： Crack fracture mechanics Elastoplasticity finite element method Geometry Nonlinearity

基于大数据和无线网络的采摘机器人定位技术研究

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农机化研究 2025年第1期47卷 194-198页

作者：朱雯曦绍兴职业技术学院信息工程学院浙江绍兴312000

分析了5G无线网络定位原理,提出了单基站定位技术和加权质心的5G定位技术,设计了采摘机器人定位系统硬件部分,并基于大数据和无线网络实现了采摘机器人定位系统。试验结果表明:系统具有较好的定位精度,优于单基站定位方法精度,且其定位... 详细信息

分析了5G无线网络定位原理,提出了单基站定位技术和加权质心的5G定位技术,设计了采摘机器人定位系统硬件部分,并基于大数据和无线网络实现了采摘机器人定位系统。试验结果表明:系统具有较好的定位精度,优于单基站定位方法精度,且其定位曲线与北斗定位设备曲线拟合度非常高,稳定性较好。

关键词：采摘机器人 5G无线网络定位单基站加权质心大数据

基于多尺度融合金字塔焦点网络的接触网零部件检测

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工程科学学报 2025年第2期47卷 315-327页

作者：朱新宇崔浩锐宋洋中国民用航空飞行学院航空电子电气学院西南交通大学利兹学院

作为高铁牵引供电系统的重要组成部分，接触网系统承担着向动车组传输电能的重要功能.实际工程运营表明，受弓网交互产生的持续冲击以及外部环境的影响，接触网支撑部件可能会出现“松、脱、断、裂”等缺陷，导致接触网结构可靠性下降... 详细信息

作为高铁牵引供电系统的重要组成部分，接触网系统承担着向动车组传输电能的重要功能.实际工程运营表明，受弓网交互产生的持续冲击以及外部环境的影响，接触网支撑部件可能会出现“松、脱、断、裂”等缺陷，导致接触网结构可靠性下降，严重影响接触网系统稳定运行.因此，及时精确定位接触网支撑部件（CSCs），对保障高铁安全运行和完善接触网检修维护策略具有重大意义.然而，CSCs的检测通常面临着零部件种类多、尺度差异大、部分零部件微小的问题.针对以上问题，本文提出一种基于多尺度融合金字塔焦点网络的接触网零部件检测算法，将平衡模块和特征金字塔模块相结合，提高对小目标的检测性能.首先，设计了可分离残差金字塔聚合模块（SRPAM），用于优化模型多尺度特征提取能力、扩大感受野，缓解CSCs检测的多尺度问题；其次，设计了一种基于平衡特征金字塔的路径聚合网络（PA-BfPN）,用于提升跨层特征融合效率和小目标检测性能.最后，通过对比试验、可视化实验和消融实验证明了所提方法的有效性和优越性.其中，所提的MfPfCOS在CSCs数据集上的检测精度（mAP）能够在达到48.6%的同时，实现30的fLOPs (floating point operations per second)，表明所提方法能够在检测精度和检测速度之间保持良好的平衡.

关键词：深度学习目标检测接触网支撑组件(CSCs) 路径聚合特征金字塔(PA-fPN) 空洞空间卷积池化金字塔(ASPP)

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多感官视角下城市居民滨江空间景观感知偏好

中山大学学报（自然科学版）（中英文） 2025年第1期64卷 182-194页

作者：朱战强李欢中山大学地理科学与规划学院广东广州510006 广东省公共安全与灾害工程技术研究中心广东广州510006

中国城镇化迈入人口城镇化的“下半场”,多感官下的居民景观感知与规划设计是近年空间感知分析与规划设计的热点。然而,现有研究多集中于视觉、听觉单一感官分析或双重感官分析,存在着对嗅觉、触觉等感官缺乏关注,以及对多感官结合分析... 详细信息

中国城镇化迈入人口城镇化的“下半场”,多感官下的居民景观感知与规划设计是近年空间感知分析与规划设计的热点。然而,现有研究多集中于视觉、听觉单一感官分析或双重感官分析,存在着对嗅觉、触觉等感官缺乏关注,以及对多感官结合分析关注很少的理论不足。本文以多感官感知为视角,以广州市滨江公共空间景观作为研究对象,将其分为“自然、人类/人类活动、人造/机械”3种景观要素及33个景观因素,通过构建感知增长率指数,对视觉、听觉、嗅觉和触觉4种感官下的不同类型滨江空间的居民景观感知特征进行评价。结果表明:不同景观要素下4种感官的感知相对敏感度不同,自然景观中嗅觉敏感,人类活动景观中听觉敏感,人造景观中触觉敏感。相对视觉和触觉而言,听觉和嗅觉下居民景观感知需求更容易被忽视。居民对自然声音和自然气味的景观要素感知期待仍需加强,而人类活动声和机械气味则不受欢迎。多感官下的景观要素感知特征在不同类型的公共空间下存在差异,广场和桥下/码头是重点改造空间,需特别关注避免电子设备声和交通噪声的干扰。最后形成了各滨江空间相应的感知设计指引。本文提出,集成多感官的居民景观感知分析可为城市滨江空间规划和设计提供实质性的参考。

关键词：多感官感知滨江空间景观要素偏好广州市

Determination of stress intensity factor with direct stress approach using finite element analysis

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Acta Mechanica Sinica 2017年第5期33卷 879-885页

作者： X.ji f.zhu P.f.He School of Aerospace Engineering and Applied Mechanics Tongji University

In this article, a direct stress approach based on finite element analysis to determine the stress intensity factor is improved. firstly, by comparing the rigorous solution against the asymptotic solution for a problem of an infinite plate embedded a central crack, we found that the stresses in a restrictive interval near the crack tip given by the rigorous solution can be used to determine the stress intensity factor, which is nearly equal to the stress intensity factor given by the asymptotic solution. Secondly, the crack problem is solved numerically by the finite element method. Depending on the modeling capability of the software, we designed an adaptive mesh model to simulate the stress singularity. Thus, the stress result in an appropriate interval near the crack tip is fairly approximated to the rigorous solution of the corresponding crack problem. Therefore, the stress intensity factor may be calculated from the stress distribution in the appropriate interval, with a high accuracy.

关键词： fracture mechanics Stress singularity Stress intensity factor finite element method Direct stress method

Analysis of interlaminar stress and nonlinear dynamic response for composite laminated plates with interfacial damage

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Acta Mechanica Sinica 2008年第6期24卷 709-720页

作者： f.H.zhu .M.fu College of Mechanics and Aerospace Hunan University410082 ChangshaChina

By considering the effect of interfacial damage and using the variation principle, three-dimensional nonlinear dynamic governing equations of the laminated plates with interfacial damage are derived based on the general sixdegrees-of-freedom plate theory towards the accurate stress analysis. The solutions of interlaminar stress and nonlinear dynamic response for a simply supported laminated plate with interfacial damage are obtained by using the finite difference method, and the results are validated by comparison with the solution of nonlinear finite element method. In numerical calculations, the effects of interfacial damage on the stress in the interface and the nonlinear dynamic response of laminated plates are discussed.

关键词： Laminated plates Geometric nonlinearity Accurate stress analysis Interfacial damage Interlaminar stress Nonlinear dynamic response