检索结果-内蒙古大学图书馆

Dual-compressed photoacoustic single-pixel imaging

National science Review 2023年第1期10卷 187-195页

作者： Yuning Guo Baowen Li Xiaobo Yin Department of Mechanical Engineering University of Colorado Department of Material Science and Engineering Department of Physics Shenzhen Institute for Quantum Science and Engineering Southern University of Science and Technology Materials Science and Engineering Program University of Colorado

Photoacoustic imaging,an acoustic imaging modality with potentially optical resolution in an optical turbid medium,has attracted great ***,the convergence of wavefront optimization and raster scanning in computational photoacoustic imaging leads to the challenge of fast mapping,especially for a spatial resolution approaching the acoustic deep-subwavelength *** a sparse sampling paradigm,compressive sensing has been applied in numerous fields to accelerate data acquisition without significant quality *** this work,we propose a dual-compressed approach for photoacoustic surface tomography that enables high-efficiency imaging with 3D spatial resolution unlimited by the acoustics in a turbid *** dual-compressed photoacoustic imaging with single-pixel detection,enabled by spatially optical modulation with synchronized temporally photoacoustic coding,allows decoding of the fine optical information from the modulated acoustic signal even when the variance of original photoacoustic signals is *** perform a proof-of-principle numerical demonstration of dual-compressed photoacoustic imaging, that resolves acoustic sub-acoustic-wavelength details with a significantly reduced number of measurements,revealing the potential for dynamic *** dual-compressed concept,which transforms unobtrusive spatial difference into spatio-temporal detectable information,can be generalized to other imaging modalities to re alize efficient,high-spatial-resolution imaging.

关键词： photoacoustic imaging compressive sensing single-pixel imaging surface tomography

来源：评论

学校读者我要写书评

暂无评论

Memory and rejuvenation in glassy systems

引用

Physical Review B 2024年第6期110卷 L060411页

作者： J. Freedberg W. Joe Meese J. He D. L. Schlagel E. Dan Dahlberg R. L. Orbach School of Physics and Astronomy Department of Mechanical Engineering Division of Materials Science and Engineering Texas Materials Institute

The memory effect in a single-crystal spin glass (Cu0.92Mn0.08) has been measured using 1 Hz ac susceptibility techniques over a temperature range of 0.4–0.7Tg, and a model of the memory effect has been developed. A double-waiting-time protocol is carried out where the spin glass is first allowed to age at a temperature below Tg, followed by a second aging at a lower temperature, Tw2, after it has fully rejuvenated. The model is based on calculating typical coincident growth of correlated regions at the two temperatures. It accounts for the absolute magnitude of the memory effect as a function of both waiting times and temperatures. The data can be explained by the memory loss being a function of the relative change in the correlated volume at the first waiting temperature because of the growth in the correlations at the second waiting temperature.

关键词： Aging Collective behavior Dynamical phase transitions Glass transition Magnetic interactions Magnetization dynamics Mesoscopics Nonequilibrium statistical mechanics Polymerization RKKY interaction Disordered systems Spin glasses AC susceptibility measurements Susceptibility measurements

来源：评论

学校读者我要写书评

暂无评论

Facile growth of a heteroepitaxial layer on perovskite oxide surfaces for active and durable fuel cell cathodes

引用

Journal of Energy Chemistry 2025年第4期103卷 1-8页

作者： Shengli Pang Yifan Song Ting Fang Xudong He Jiaxiang Qiu Shuai Ma Yaozheng Qian Gongmei Yang Hongping Li Yangyang Wan Chonglin Chen Institute for Advanced Materials School of Materials Science and Engineering Jiangsu University Department of Physics and Astronomy University of Texas at San Antonio

Polycrystalline perovskite oxide particles are promising candidates for cathode materials in solid oxide fuel ***,their limited activity and stability pose significant challenges for practical *** this study,we demonstrate a novel approach to achieve both high activity and durability in a PrBaCo2O5+δcatalyst through a simple epitaxial layer growth *** found that an amorphous precursor of the highly durable catalyst SmBa0.5Ca0.5CoCuO5+δcan spontaneously adhere to the surface of PrBaCo2O5+δ*** heat treatment,it grows along the perovskite lattice,forming a heteroepitaxial layer with just a few atomic layers *** heterostructure enhances the operational stability of PrBaCo2O5+δtransforming a 78% decrease over 100 h into a 7% *** 100 h,the power output density of the cell with the modified sample is more than 500% higher than that of unmodified PrBaCo2O5+δ.This work presents a new strategy for fabricating heteroepitaxial layers on polycrystalline ceramic catalysts and introduces a pioneering approach for developing high-performance oxygen reduction catalysts and related materials.

关键词： Cathode material Electrocatalyst Oxygen reduction reaction Perovskite oxide Solid oxide fuel cell Surface chemistry

来源：评论

学校读者我要写书评

暂无评论

Investigation of decay mechanisms and associated aspects of exotic nobelium isotopes using the Skyrme energy density formalism

引用

Chinese physics C 2025年第3期49卷 132-142页

作者： Shubhpreet Kaur Raj Kumar Manoj K.Sharma Department of Physics and Materials Science Thapar Institute of Engineering and TechnologyPatiala 147004India

The search for heavy elements has yielded many surprises and enhanced our knowledge of nuclear synthesis and associated dynamical *** new elements and their associated isotopes have been synthesized,information concerning elements with Z≥102,remains ***,concerning the transfermium elements,the nuclear shell structure is key to ensuring nuclear ***,the shell effects have key implications on such *** experimental and theoretical investigations have been conducted to examine the reactions induced by heavy ions and the subsequent decay mechanisms in the superheavy mass *** addition,the region of transfermium elements is of great interest because of the neutron/proton shell ***,our objective is to analyze the decay mechanisms of nuclides having Z=102 nuclei,i.e.,^(248)No*and^(250)No*.An extensive study was conducted using the dynamical cluster-decay model(DCM)based on Quantum Mechanical Fragmentation Theory(QMFT).The focus was to investigate compound nucleus(CN)and non-compound nucleus(nCN)mechanisms,including fusion-fission(ff),quasi-fission(QF),and fast fission(FF).The specific isotopes of interest are^(248)No*and^(250)No*,with attention given to the role of the center-of-mass energy(E_(c.m))and angular momentum(l).The nuclear interaction potential was derived using the Skyrme energy density formalism(SEDF)with the GSkI force *** capture cross-sections were calculated using the-summed Wong *** determination of the probability of compound nucleus formation(PCN)involved a function that is dependent upon the center-of-mass *** lifetimes of the ff and QF channels were also ***,CN and nCN decay mechanisms for two isotopes of Z=102 nobelium were analyzed over the range of center-of-mass values(E_(c.m))considering the quadrupole deformationβ_(2)and optimum orientations(θ_(opt))of the decaying *** fragmentation potential,preformation probability,neck length parameter,and

关键词： super heavy nuclei Z=102 cross-sections lifetimes

来源：评论

学校读者我要写书评

暂无评论

Microstructure and magnetocaloric properties of melt-extracted SmGdDyCoAl high-entropy amorphous microwires

引用

Rare Metals 2024年第3期43卷 1234-1242页

作者： Shi-Jie Wei Hong-Xian Shen Lun-Yong Zhang Lin Luo Xin-Xing Tang Jian-Fei Sun Xiao-Qing Li School of Materials Science and Engineering Harbin Institute of TechnologyHarbin150001China Applied Materials Physics Department of Materials Science and EngineeringKTH-Royal Institute of Technology10044StockholmSweden

This paper presents a systematic investigation of the microstructure and magnetocaloric properties of melt-extracted Sm_(20)Gd_(20)Dy_(20)Co_(20)Al_(20)high-entropy *** fabricated wires exhibited an amorphous structure,and the temperature interval of the undercooled liquid AT was 45 *** microwires underwent a second-order magnetic transition from a ferromagnetic to a paramagnetic state near the Curie temperature(T_(C)=52 K),The maximum magnetic entropy change(-ΔS_M^(max)),the relative cooling power and the refrigeration capacity reached 6.34 J·kg^(-1)·K^(-1).422.09 J·kg^(-1)and 332.94 J·kg^(-1),respectively,under a magnetic field change of 5 *** addition,the temperature-averaged entropy changes with two temperature lifts(3 and 10 K)were 6.32 and 6.27 J·kg^(-1)·K^(-1),*** good magnetocalorie performance highlights the significant potential for the Sm_(20)Gd_(20)Dy_(20)Co_(20)Al_(20)microwires to be used as magnetic refrigerant materials in low-temperature region *** work will serve as a valuable reference for future investigations on low-temperature high-entropy magnetocaloric materials.

关键词： Melt-extraction High-entropy amorphous microwires Magnetocaloric effect Magnetic refrigeration

来源：评论

学校读者我要写书评

暂无评论

Improving wear resistance of 3D printed alumina-based ceramics via sintering temperature

引用

China Foundry 2025年第2期22卷 151-162页

作者： Jing-wen Sun He Li Yun-song Mu Bao-xia Mu Yan-hua Chen Paolo Colombo School of Materials Science and Engineering Xinjiang Key Laboratory of Solid State Physics and DevicesXinjiang UniversityUrumqi 830046China School of Materials Science and Engineering Xinjiang Environmental and Functional Materials Engineering Research CenterXinjiang UniversityUrumqi 830046China School of Physics Science and Technology Xinjiang UniversityUrumqi 830046China Department of Industrial Engineering University of PadovaPadova 35131Italy

Ceramic materials with intricate structures can be efficiently fabricated using stereolithography(SLA)based 3D printing technology,offering advantages over traditional *** temperature has primary effect on properties of *** study investigated the crucial sintering temperature for 3D printed ceramics to ensure the desired *** results indicate that all samples exhibit a consistent layered structure across the experimental sintering *** the sintering temperature is increased from 1,250℃ to 1,350℃,the grain's morphology changes from spherical to *** morphology analysis reveals a decrease in surface roughness at sintering temperatures above 1,350℃.Mechanical tests show improved flexural strength and stiffness as the sintering temperature *** and wear experiments demonstrate that as the sintering temperature increases from 1,450℃ to 1,550℃,the wear pattern on ceramic surfaces transitions from deep pits to shallow *** increase in sintering temperature effectively enhances the wear resistance of 3D printed alumina *** improvement plays a significant role in expanding the application field of these ceramics,prolonging the lifespan of parts,reducing production costs,enhancing performance,and promoting environmental *** this study,ceramics achieve the highest strength and best wear resistance when sintered at 1,600℃,resulting in the best overall performance.

关键词： sintering temperature friction and wear properties stereolithography alumina ceramics

来源：评论

学校读者我要写书评

暂无评论

A Practical Zinc Metal Anode Coating Strategy Utilizing Bulk h-BN and Improved Hydrogen Redox Kinetics

引用

Energy & Environmental materials 2025年第2期8卷 63-71页

作者： Dong Il Kim Hee Bin Jeong Jungmoon Lim Hyeong Seop Jeong Min Kyeong Kim Sangyeon Pak Sanghyo Lee Geon-Hyoung An Sang-Soo Chee Jin Pyo Hong Seung Nam Cha John Hong Department of Physics Research Institute for Natural Science Hanyang University School of Materials Science and Engineering Kookmin University Department of Physics Sungkyunkwan University (SKKU) School of Electronic and Electrical Engineering Hongik University Materials Science and Engineering Kumoh National Institute of Technology Department of Energy Engineering Gyeongsang National University Nano Convergence Materials Center Korea Institute of Ceramic Engineering and Technology (KICET) Division of Nano-Scale Semiconductor Engineering Hanyang University

Achieving high-performance aqueous zinc-ion batteries requires addressing the challenges associated with the stability of zinc metal anodes,particularly the formation of inhomogeneous zinc dendrites during cycling and unstable surface *** study introduces a practical method for scattering untreated bulk hexagonal boron nitride（h-BN） particles onto the zinc anode *** cycling,stabilized zinc fills the interstices of scattered h-BN,resulting in a more favorable（002） ***,zinc dendrite formation is effectively suppressed,leading to improved electrochemical *** zinc with scattered h-BN in a symmetric cell configuration maintains stability 10 times longer than the bare zinc symmetric cell,lasting 500 ***,in a full cell configuration with α-MnO2cathode,increased H+ion activity can effectively alter the major redox kinetics of cycling due to the presence of scattered h-BN on the zinc *** shift in H+ion activity lowers the overall redox potential,resulting in a discharge capacity retention of 96.1% for 300 cycles at a charge/discharge rate of 0.5 *** study highlights the crucial role of surface modification,and the innovative use of bulk h-BN provides a practical and effective solution for improving the performance and stability.

关键词： aqueous zinc ion batteries H+ ion insertion hexagonal boron nitride scattering Zn metal anode

来源：评论

学校读者我要写书评

暂无评论

Syntropic spin alignment at the interface between ferromagnetic and superconducting nitrides

引用

National science Review 2024年第8期11卷 167-179页

作者： Qiao Jin Qinghua Zhang He Bai Meng Yang Yonglong Ga Shengru Chen Haitao Hong Ting Cui Dongke Rong Ting Lin Jia-Ou Wang Chen Ge Can Wang Yanwei Cao Lin Gu Guozhu Song Shanmin Wang Kun Jiang Zhi-Gang Cheng Tao Zhu Hongxin Yang Kui-juan Jin Er-Jia Guo Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of Sciences Spallation Neutron Source Science Center Department of Physics & Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Ningbo Institute of Materials Technology &Engineering Chinese Academy of Sciences Institute of High Energy Physics Chinese Academy of Sciences Songshan Lake Materials Laboratory National Center for Electron Microscopy in Beijing and School of Materials Science and Engineering Tsinghua University Department of Physics Southern University of Science and Technology School of Physics Zhejiang University

The magnetic correlations at the superconductor/ferromagnet（S/F） interfaces play a crucial role in realizing dissipation-less spin-based logic and memory technologies,such as triplet-sup ercurrent spin-valves and 'π'Josephson *** we report the observation of an induced large magnetic moment at high-quality nitride S/F *** polarized neutron reflectometry and DC S QUID measurements,we quantitatively determined the magnetization profile of the S/F bilayer and confirmed that the induced magnetic moment in the adjacent superconductor only exists below ***,the direction of the induced moment in the superconductors was unexpectedly parallel to that in the ferromagnet,which contrasts with earlier findings in S/F heterostructures based on metals or ***-principles calculations verified that the unusual interfacial spin texture observed in our study was caused by the Heisenberg direct exchange coupling with constant J～4.28 meV through d-orbital overlapping and severe charge transfer across the *** work establishes an incisive experimental probe for understanding the magnetic proximity behavior at S/F interfaces and provides a prototype epitaxial 'building block' for superconducting spintronics.

关键词： magnetic proximity effects nitride interfaces polarized neutron reflectometry superconductor/ferromagnetic interfaces superconducting spintronics

来源：评论

学校读者我要写书评

暂无评论

Boundary-induced phase in epitaxial iron layers

引用

Physical Review materials 2024年第8期8卷 L081401-L081401页

作者： Anna L. Ravensburg Mirosław Werwiński Justyna Rychły-Gruszecka Justyn Snarski-Adamski Anna Elsukova Per O. Å. Persson Ján Rusz Rimantas Brucas Björgvin Hjörvarsson Peter Svedlindh Gunnar K. Pálsson Vassilios Kapaklis Department of Physics and Astronomy Institute of Molecular Physics Thin Film Physics Division Department of Physics Chemistry and Biology (IFM) Department of Materials Science and Engineering

We report on the discovery of a boundary-induced body-centered tetragonal iron phase in thin films deposited on MgAl2O4 (001) substrates. We present evidence for this phase using detailed x-ray analysis and ab initio density functional theory calculations. A lower magnetic moment and a rotation of the easy magnetization direction are observed, as compared with body-centered cubic iron. Our findings expand the range of known crystal and magnetic phases of iron, providing valuable insights for the development of heterostructure devices using ultrathin iron layers.

关键词： Crystal structures Magnetic thin films Density functional theory Magneto-optical Kerr effect Scanning transmission electron microscopy X-ray scattering

来源：评论

学校读者我要写书评

暂无评论

Strain-dependent insulating state and Kondo effect in epitaxial SrIrO3 films

引用

Physical Review materials 2024年第7期8卷 L071201-L071201页

作者： Gaurab Rimal Tanzila Tasnim Gabriel Calderon Ortiz George E. Sterbinsky Jinwoo Hwang Ryan B. Comes Department of Physics Department of Materials Science and Engineering Argonne National Laboratory Lemont Illinois 60439 USA

The large spin-orbit coupling in iridium oxides plays a significant role in driving novel physical behaviors, including emergent phenomena in the films and heterostructures of perovskite and Ruddlesden-Popper iridates. In this Letter, we study the role of epitaxial strain on the electronic behavior of thin SrIrO3 films. We find that compressive epitaxial strain leads to metallic transport behavior, but a slight tensile strain shows gapped behavior. Temperature-dependent resistivity measurements are used to examine different behaviors in films as a function of strain. We find Kondo contributions to the resistivity, with stronger effects in films that are thinner and under less compressive epitaxial strain. These results show the potential to tune SrIrO3 into Kondo insulating states and open possibilities for a quantum critical point that can be controlled with strain in epitaxial films.

关键词： Epitaxial strain Kondo effect Thin films Electron microscopy Epitaxy X-ray photoelectron spectroscopy

来源：评论

学校读者我要写书评

暂无评论

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

请选择保存的检索档案：

请选择收藏分类：

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

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

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：