检索结果-内蒙古大学图书馆

Superconductivity in Cubic La_(3)Al with Interstitial Anionic Electrons

Chinese Physics Letters 2025年第2期42卷 88-97页

作者： Zhijun Tu Peihan Sun Donghan Jia Huiyang Gou Kai Liu Hechang Lei School of Physics and Beijing Key Laboratory of Optoelectronic Functional Materials&MicroNano Devices Renmin University of ChinaBeijing 100872China Key Laboratory of Quantum State Construction and Manipulation(Ministry of Education) Renmin University of ChinaBeijing 100872China Department of Physics School of ScienceHebei University of Science and TechnologyShijiazhuang 050018China Center for High Pressure Science and Technology Advanced Research Beijing 100193China

We observed superconductivity in a cubic La_(3)Al single crystal that exhibits metallic behavior in the normal state without an observable structural transition and enters the superconducting state below T_(c)~6.32 *** characterization and analysis indicate that cubic La_(3)Al is a bulk type-Ⅱ BCS ***,theoretical calculations show that it can host interstitial anionic electrons located at the body center of the cubic unit cell,which confirms electron-phonon coupling as the superconducting ***,cubic La_(3)Al can be considered as a novel electride superconductor.

关键词： mechanism cubic

来源：评论

学校读者我要写书评

暂无评论

Enhancing the Intrinsic Stability of Nonfullerene Acceptors through Dimerization via Ring-locking Strategy

引用

Chinese Journal of Chemistry 2025年第6期43卷 641-649页

作者： Yaxin He Ji Wan Xianglang Sun Jie Min Zhong’an Li Key Laboratory for Material Chemistry of Energy Conversion and Storage Ministry of EducationHubei Key Laboratory of Material Chemistry and Service FailureSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhanHubei430074 China The Institute for Advanced Studies Wuhan UniversityWuhanHubei430072 China

Comprehensive Summary The power conversion efficiencies(PCEs)of non-fullerene acceptor(NFA)-based organic solar cells(OSCs)have undergone an exciting development in recent years,but the poor intrinsic stability of exocyclic ethylene bridges in NFAs poses a significant challenge to their *** this work,we propose a new pyran-locking strategy that can stabilize the exocyclic ethylene bridge connecting the strong electron-deficient 2-(3-oxo-2,3-dihydroinden-1-ylidene)malononitrile end group,based on which two dimerized NFAs(ITBIC-F and TBTBIC-F)with an A-D-π-A-π-D-A structure have been successfully synthesized with significantly improved chemical and photochemical stabilities in comparison with traditional NFAs without the ring-locked *** ITBIC-F and TBTBIC-F-based OSCs not only achieve promising PCEs of 13.03%and 10.01%,respectively,but also show good device stability;the ITBIC-F-based unencapsulated devices can retain 75%and 62%of their initial PCEs,respectively,under continuous heat(85°C)and light irradiation(LED,100 mW·cm^(–2))in a nitrogen atmosphere.

关键词： Organic solar cells Electron acceptors Intrinsic stability Ring-locking strategy Photovoltaic properties

来源：评论

学校读者我要写书评

暂无评论

Photoelectron momentum distributions by an inhomogeneous polarization-gated pulse

引用

Optics Express 2025年第6期33卷 14419-14430页

作者： Sun, Yue Yan, Peng Sun, Qi-Hang School of Materials Science and Engineering Changchun University of Technology Changchun130012 China Changchun University of Technology Key Laboratory of Advanced Structural Materials Ministry of Education Changchun130012 China College of Electronic Science and Engineering Jilin University Changchun130012 China

We theoretically investigate the photoelectron momentum distributions (PMDs) of the argon atom by using an inhomogeneous polarization-gated pulse. The numerical results show that the symmetry of the PMDs is disrupted and a vertical interference stripe appears as the inhomogeneity parameters increase. We illustrate that the interference mechanisms of these vertical interference stripes are different from traditional interference mechanisms, which are interference between direct electrons ionized in the same quarter-cycle. In addition, by analyzing the electron trajectories, we find that the breakdown of symmetry is due to the strong suppression of the positive deviation of electrons along the x-axis by the inhomogeneous PG pulse. © 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

关键词： Photoelectrons

来源：评论

学校读者我要写书评

暂无评论

Research on wear state prediction of ball end milling cutter based on entropy measurement of tool mark texture images

引用

Journal of Central South University 2025年第1期32卷 174-188页

作者： LI Mao-yue LU Xin-yuan LIU Ze-long ZHANG Ming-lei Key Laboratory of Advanced Manufacturing and Intelligent Technology Ministry of EducationHarbin University of Science and TechnologyHarbin 150080China

Efficient tool condition monitoring techniques help to realize intelligent management of tool life and reduce tool usage *** this paper,the influence of different wear degrees of ball-end milling cutters on the texture shape of machining tool marks is investigated,and a method is proposed for predicting the wear state(including the position and degree of tool wear)of ball-end milling cutters based on entropy measurement of tool mark texture ***,data samples are prepared through wear experiments,and the change law of the tool mark texture shape with the tool wear state is ***,a two-dimensional sample entropy algorithm is developed to quantify the texture ***,the processing parameters and tool attitude are integrated into the prediction process to predict the wear value and wear position of the ball end milling *** testing,the correlation between the predicted value and the standard value of the proposed tool condition monitoring method reaches 95.32%,and the accuracy reaches 82.73%,indicating that the proposed method meets the requirement of tool condition monitoring.

关键词： ball-end cutter wear tool condition monitoring surface texture texture quantifier sample entropy

来源：评论

学校读者我要写书评

暂无评论

Evidence of microstructural evolution linked to non-monotonic distribution of micromechanical properties induced by shot peening

引用

材料科学技术（英文版） 2025年第4期207卷 238-245页

作者： Guoxin Lu Qiang Wang Bonnie Attard Huhu Su Shijian Zheng Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of EducationSchool of Materials Science and EngineeringShandong UniversityJinan250061China Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material AECC Beijing Institute of Aeronautical MaterialsBeijing100095China Department of Metallurgy and Materials Engineering University of MaltaMSD2080Malta Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology School of Materials Science and EngineeringHebei University of TechnologyTianjin300130China

The residual stress field induced by surface strengthening processes such as mechanical shot peening and other forms of plastic deformation does not generally exhibit a simple"monotonic"distribution *** researchers have analyzed this fact from a mechanical perspective based on Hertz ***,the micro/nano-scale microstructural changes corresponding to the distribution of residual stress fields still appear to be *** this study,we focused on a widely used material in aviation manufacturing,namely nickel-based superalloy GH4169,as our experimental *** subjected GH4169 alloy to me-chanical strengthening treatment using a shot peening intensity of 0.25 mmA,followed by quantitative testing of micromechanical performance indicators such as microhardness and residual *** thor-oughly investigate the relationship between micromechanical properties and microstructure changes,we utilized transmission electron microscopy(TEM)to observe and analyze shot-peened materials at differ-ent *** findings revealed that the most severe microstructural distortion induced by mechanical shot peening in GH4169 alloy was likely to occur within a depth range of 25 to 75 *** observation aligns with the actual phenomenon that the maximum microhardness and maximum residual compres-sive stress did not manifest on the outermost surface of the *** presenting a detailed analysis of deformation defects such as dislocations,stacking faults,and twinning in different depths of mechan-ically strengthened layers,our study contributes to a deeper understanding and practical application of post-processing technologies based on plastic deformation.

关键词： Mechanical shot peening Surface strengthening Residual stress Microstructure

来源：评论

学校读者我要写书评

暂无评论

High-performance flexible Sb_(2)Se_(3) thin-film photodetector for tunable color imaging and wearable physiological monitoring applications

引用

Nano Research 2025年第2期18卷 687-698页

作者： Shuo Chen Hong-Bo Li Yi Fu Guo-Qiang Liu Muhammad Ishaq Jun Luo Jian-Min Li Bo Che Jing-Ting Luo Liming Ding Tao Chen Guang-Xing Liang Shenzhen Key Laboratory of Advanced Thin Films and Applications Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceState Key Laboratory of Radio Frequency Heterogeneous IntegrationCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China The Hospital of Shenzhen General Station of Exit and Entry Frontier Inspection Shenzhen 518024China Key Laboratory of Artificial Micro-and Nano-structures of Ministry of Education School of Physics and TechnologyWuhan UniversityWuhan 430072China Hefei National Research Center for Physical Sciences at Microscale CAS Key Laboratory of Materials for Energy ConversionDepartment of Materials Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190China

Antimony selenide(Sb_(2)Se_(3))has recently made considerable photovoltaic,advancements in photoelectrochemical,and photodetector research scenarios,owing to its advantageous material merits and superior optoelectronic *** contrast,the exploration of flexible Sb_(2)Se_(3) photoelectric devices are less attempted,though it possesses unique one-dimensional(1D)crystal structure to enable large deformation ***,we develop a flexible Sb2Ses thin-film photodetector on polyimide *** to the high-quality SbSes light absorber and benign interfaces at both back contact and heterojunction regions,the carrier dynamics are effectively *** leading flexible Sb_(2)Se_(3) photodetector showcases self-powered and broadband features,with exceptional responsivity of 0.51 A·W^(-1) and realistic detectivity up to 1.32×10^(13) Jones,ultra-fast response speed of 49 ns/351 ns of rise and decay times,and remarkable mechanical deformation stability,flourishing the high-level development for flexible Sb_(2)Se_(3) ***,a tunable single/dual-color flexible imaging system under band alignment modulation,along with a wearable and accurate heart rate/arterial blood oxygen saturation photoplethysmography detection system highlights the great application potential for flexible Sb,Ses photodetectors.

关键词： Sb_(2)Se_(3) flexible thin-film photodetector color imaging heart rate arterial blood oxygen saturation

来源：评论

学校读者我要写书评

暂无评论

Multi-Scale Time Series Segmentation Network Based on Eddy Current Testing for Detecting Surface Metal Defects

引用

IEEE/CAA Journal of Automatica Sinica 2025年第3期12卷 528-538页

作者： Xiaorui Li Xiaojuan Ban Haoran Qiao Zhaolin Yuan Hong-Ning Dai Chao Yao Yu Guo Mohammad S.Obaidat George Q.Huang the School of Intelligence Science and Technology University of Science and Technology Beijing the Beijing Advanced Innovation Center for Materials Genome Engineering the Key Laboratory of Intelligent Bionic Unmanned Systems and the Institute of Materials Intelligent Technology Liaoning Academy of Materials IEEE the Department of Computer Science Hong Kong Baptist University the School of Computer and Communication Engineering Key Laboratory of Advanced Materials and Devices for Post-Moore Chips Ministry of Education University of Science and Technology Beijing the Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology Beijing the School of Computer and Communication Engineering University of Science and Technology Beijing the King Abdullah Ⅱ School of Information Technology The University of Jordan the Department of Computational Intelligence the School of Computing SRM University the School of Engineering The Amity University The Hong Kong Polytechnic University

In high-risk industrial environments like nuclear power plants, precise defect identification and localization are essential for maintaining production stability and safety. However, the complexity of such a harsh environment leads to significant variations in the shape and size of the defects. To address this challenge, we propose the multivariate time series segmentation network(MSSN), which adopts a multiscale convolutional network with multi-stage and depth-separable convolutions for efficient feature extraction through variable-length templates. To tackle the classification difficulty caused by structural signal variance, MSSN employs logarithmic normalization to adjust instance distributions. Furthermore, it integrates classification with smoothing loss functions to accurately identify defect segments amid similar structural and defect signal subsequences. Our algorithm evaluated on both the Mackey-Glass dataset and industrial dataset achieves over 95% localization and demonstrates the capture capability on the synthetic dataset. In a nuclear plant's heat transfer tube dataset, it captures 90% of defect instances with75% middle localization F1 score.

关键词： Eddy current testing nondestructive testing semantic segmentation time series analysis

来源：评论

学校读者我要写书评

暂无评论

Sequential phosphorization and carbonization with modulated d-p orbital interactions in cobalt phosphides for enhanced polysulfide redox kinetics

引用

Journal of Energy Chemistry 2025年第3期102卷 576-585页

作者： Chenshan Lv Zhi Zheng Liangtao Yang Hailiang Cao Peng Li Yanqin Miao Wei Deng Yuan Chen Key Laboratory of Interface Science and Engineering in Advanced Materials Ministry of EducationCollege of Materials Science and EngineeringTaiyuan University of TechnologyTaiyuan 030024ShanxiChina School of Chemical and Biomolecular Engineering The University of SydneyDarlingtonNew South Wales 2006Australia Shenzhen Institute of Advanced Technology Chinese Academy of SciencesShenzhen 518055GuangdongChina School of Science RMIT UniversityMelbourneVictoria 3000Australia

Cobalt phosphides are potential catalysts to assist the conversion of lithium polysulfides(LiPSs)in lithium-sulfur(Li-S)***,existing synthesis methods have difficulty precisely tuning their band valences,which is crucial to balancing intermediate products'adsorption and conversion abilities in Li-S ***,studies on the relationship between their band structures and electrochemical performance are ***,we report cobalt phosphides(Co_(x)P)with a heterogeneous interface of CoP/Co2P embedded in hollow carbon nanofibers(denoted as Co_(x)P@HCNF)via a one-step sequential phosphorization and carbonization strategy,which is applied as an effective interlayer for Li-S *** Co band valence in CoxP was adjusted to regulate the d-p band *** calculations predict that Co_(x)P with a narrowed d-p band center can optimize the electron transfer kinetics and the adsorption affinity with ***-S full cells with a Co_(x)P@HCNF interlayer demonstrated a high specific capacity of1265 mA h g^(-1)at 0.2C and excellent cycle stability of 788 mA h g^(-1)over 400 cycles at 2.0C.A cell with a lean electrolyte(6.0μL mg^(-1))and a high sulfur loading(6.2 mg cm^(-2))delivered a high areal capacity of4.5 mA h cm^(-2)at *** study demonstrates that bimetallic coupling-induced electronic-state modulation effectively balances the chemical adsorption and catalytic capability for developing high-performance Li-S batteries.

关键词： Lithium-sulfur battery Cobalt phosphide Heterogeneous structures Interlayer

来源：评论

学校读者我要写书评

暂无评论

Characterization, Mechanical Property, Degradation Behavior, and Osteogenic Activity of Zn-Mn Alloy Foam Prepared by Electrodeposition

引用

Acta Metallurgica Sinica (English Letters) 2025年 1-17页

作者： Wang, Tiantian Liu, Lin Liu, Zexin Wang, Kang Yao, Runhua Yao, Xiaohong Hang, Ruiqiang Shanxi Key Laboratory of Biomedical Metal Materials College of Materials Science and Engineering Taiyuan University of Technology Taiyuan030024 China Key Laboratory of Interface Science and Engineering in Advanced Materials Ministry of Education Taiyuan University of Technology Taiyuan030024 China

Zinc (Zn)-based materials show broad application prospects for bone repair due to their biodegradability and good biocompatibility. In particular, Zn metal foam has unique interconnected pore structure that facilitates inward growth of new bone tissue, making it ideal candidates for orthopedic implants. However, pure Zn metal foam shows poor mechanical property, high degradation rate, and unsatisfactory osteogenic activity. Herein, Zinc-manganese (Zn-Mn) alloy foams were electrodeposited in Zn and Mn-containing electrolytes to overcome the concerns. The results showed that Mn could be incorporated into the foams in the form of MnZn13. Zn-Mn alloy foams showed better mechanical property and osteogenic activity as well as moderate degradation rate when compared with pure Zn metal foam. In addition, these properties could also be regulated by preparation process. The peak stress and osteogenic activity increased with deposition current (0.3‒0.5 A) and electrolyte pH (3‒5), but decreased with electrolyte temperature (20‒40 °C), while the degradation rate exhibited opposite tendency, which suggests high deposition current and electrolyte pH and low electrolyte temperature can fabricate Zn-Mn alloy foam with favorable mechanical property, moderate degradation rate, and osteogenic activity. These findings provide a valuable reference for the design and fabrication of novel Zn-based biodegradable materials. © The Chinese Society for Metals (CSM) and Springer-Verlag GmbH Germany, part of Springer Nature 2025.

关键词： Machinability

来源：评论

学校读者我要写书评

暂无评论

Effect of electrochemical hydrogen charging on the microstructure and mechanical behavior of a duplex structured Mg-8wt.%Li alloy

引用

Journal of Magnesium and Alloys 2025年第2期13卷 668-680页

作者： Shuo Wang Daokui Xu Baojie Wang Dongliang Wang Zhiqiang Zhang Li Liu Jie Chen Key Lab of Electromagnetic Processing of Materials Ministry of EducationNortheastern UniversityShenyang110819China Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang110016China Engineering Research Center of Advanced Materials Preparing Technology Ministry of EducationNortheastern UniversityShenyang110819China Binzhou Institute of Technology BinzhouShandong Province256606China Shandong Key Laboratory of Advanced Aluminium Materials and Technology BinzhouShandong Province256606China School of Environmental and Chemical Engineering Shenyang Ligong UniversityShenyang110159China Spallation Neutron Source Science Center Dongguan523803China

In this work,through performing microstructural characterization,tensile testing and failure analysis,the influence of electrochemical hydrogen charging on the microstructure and mechanical behavior of an as-cast Mg-8wt.%Li alloy was *** revealed that after being hydrogen charged at 50 mA/cm2 for respectively 3 h,6 h and 18 h in 0.1 M NaCl solution,obvious HID occurred and the damage degree was gradually increased with the hydrogen charging *** the sample being hydrogen charged for 3 h,micro pores with the diameter ranging from 10~30µm were formed and preferentially present inα-Mg ***,micro cracks with the length ranging from 10~50µm mainly initiated inα-Mg phase,atα-Mg/β-Li interfaces and the peripheries of *** the increase of hydrogen charging time,the numbers of pores and cracks were obviously *** results revealed that the hydrogen charging can simultaneously decrease the tensile strength and ductility of the *** with the uncharged sample,the tensile yield strength,ultimate tensile strength and the elongation ratio to failure were respectively reduced by 5.7%,7.3%,31.7%for the 3h-charged sample and 24.6%,24.8%,67.0%for the 18h-charged *** analysis indicated that hydrogen charging can induce the brittle cracking of the alloy and the size of brittle cracking region being composed of quasi-cleavage facets and interfacial cracks on the fracture surfaces was increased with the hydrogen charging time.

关键词： Magnesium-lithium alloy Microstructure Hydrogen-induced damage Hydrogen embrittlement Mechanical behavior

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：