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In-Memory Probabilistic Computing Using Gate-Tunable Layer Pseudospins in van der Waals Heterostructures

Chinese Physics Letters 2025年第4期42卷 9-22页

作者： Jiao Xie Jun-Lin Xiong Bin Cheng Shi-Jun Liang Feng Miao Institute of Brain-Inspired Intelligence National Laboratory of Solid State MicrostructuresSchool of PhysicsCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China Institute of Interdisciplinary Physical Sciences School of ScienceNanjing University of Science and TechnologyNanjing 210094China Jiangsu Physical Science Research Center Nanjing 210093China

Layer pseudospins,exhibiting quantum coherence and precise multistate controllability,present significant potential for the advancement of future computing *** this work,we propose an in-memory probabilistic computing scheme based on the electrical manipulation of layer pseudospins in layered materials,by exploiting the interaction between real spins and layer pseudospins.

关键词： layer pseudospinsexhibiting layered materialsby real spins probabilistic computing advancement future computing technologiesin electrical manipulation layer pseudospins memory computing gate tunable layer pseudospins

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Latitudinal distribution and propagation of lightning-generated whistler:A statistical study by Van Allen Probes observation and ray-tracing simulation

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science China Earth sciences 2025年第4期68卷 1291-1297页

作者： Zhaoguo HE Jiang YU Xiangling DING Zuzheng CHEN Nigang LIU Yuguang YE Jun CUI Qiugang ZONG State Key Laboratory of Lunar and Planetary Sciences Macao University of Science and TechnologyMacao999078China CNSA Macao Center for Space Exploration and Science Macao999078China Zhuhai MUST Science and Technology Research Institute Macao University of Science and TechnologyZhuhai519000China Planetary Environmental and Astrobiological Research Laboratory(PEARL) School of Atmospheric SciencesSun Yat-sen UniversityZhuhai519000China Institute of Space Physics and Applied Technology Peking UniversityBeijing100871China

Lightning-generated whistler(LGW)is an important electromagnetic wave in the magnetosphere,causing energetic electron *** we analyze the LGW distribution and propagation using Van Allen Probes data and ray-tracing *** statistics show that LGW occurs more frequently at L<2.5 with higher amplitudes in the northern *** Poynting flux demonstrates that LGW originates from both hemispheres within L~2.5,and propagates into the space as the wave power *** wave normal angle distributions indicate that LGW propagates quasi-parallel to the field line near its source and becomes oblique as the magnetic latitude ***,we use the ray-tracing model to simulate the LGW propagation,and statistically analyze the propagation characteristics of LGW,which are consistent with the observational *** paper presents the latitudinal distribution and propagation properties of LGW based on statistics for the first time,providing new insights into the LGW generation and evolution in the magnetosphere.

关键词： Lightning-generated whistler Ray-tracing model Magnetosphere Wave distribution Wave propagation

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Direct Bonding Techniques of Semiconductor Devices and Thermally Conductive Materials

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Journal of Japan Institute of Electronics Packaging 2023年第5期26卷 441-447页

作者： Matsumae, Takashi Umezawa, Hitoshi Kurashima, Yuichi Takagi, Hideki Device Technology Research Institute National Institute of Advanced Industrial Science and Technology Namiki 1-2-1 Ibaraki Tsukuba305-8564 Japan Advanced Power Electronics Research Center National Institute of Advanced Industrial Science and Technology Midorioka1-8-31 Osaka Ikeda563-8577 Japan

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Influence of ultrasonic agitation on dispersion of fibers in a shell mold for investment casting

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China Foundry 2025年

作者： Zhi-cheng Feng Kai Lü Yan Lu Wen-bo Jin Lei Che School of Materials Science and Engineering Inner Mongolia University of Technology Engineering Research Center of Development and Processing Protection of Advanced Light Metals Ministry of Education The Inner Mongolia Advanced Materials Engineering Technology Research Center

To develop a suitable production process for fiber reinforced investment casting shell mold,three methods were studied:the traditional method （M1）,the method of adding fiber into silica sol with mechanical stirring and ultrasonic agitation （M2）,and the method of adding fiber into slurry with mechanical stirring and ultrasonic agitation for durations of 3,15,30,and 45 min （M3）.The bending strength,high-temperature self-load deformation,and thermal conductivity of the shell molds were *** results reveal that the enhancement of fiber dispersion through ultrasonic agitation improves the comprehensive performance of the shell *** maximum green bending strength of the shell mold by M2reaches 3.29 MPa,which is 29%higher than that of the shell mold prepared by ***,the high-temperature self-load deformation of the shell mold is reduced from 0.62%to 0.44%.In addition,simultaneous ultrasonic agitation and mechanical stirring effectively shorten the slurry preparation time while maintaining comparable levels of fiber *** the process M3-45 min,the fillers are uniformly dispersed in the slurry,and the fired bending strength and the high-temperature self-load deformation reach 6.25 MPa and 0.41%,***,the proposed ultrasonic agitation route is promising for the fabrication of fiber-reinforced shell molds with excellent fibers dispersion.

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Regulation of cryogenic mechanical behaviors of C-added non-equiatomic CoCrFeNiMo ferrous medium-entropy alloy via control of initial microstructure

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材料科学技术（英文版） 2025年第5期208卷 141-151页

作者： Ji Yeong Lee Hyeonseok Kwon Jae Heung Lee Jihye Kwon Jaemin Wang Jae Wung Bae Jongun Moon Byeong-Joo Lee Yoon-Uk Heo Hyoung Seop Kim Department of Materials Science and Engineering Pohang University of Science and Technology(POSTECH)Pohang37673Republic of Korea Department of Metallurgical Engineering Pukyong National UniversityBusan 48513Republic of Korea Division of Advanced Materials Engineering Center for Advanced Powder Materials and PartsKongju National UniversityCheonanChungnam31080Republic of Korea Graduate Institute of Ferrous and Eco Materials Technology Pohang University of Science and Technology77 Cheongam-RoNam-GuPohang 37673Republic of Korea Department of Materials Science and Engineering Pohang University of Science and Technology(POSTECH)Pohang37673Republic of Korea Graduate Institute of Ferrous and Eco Materials Technology Pohang University of Science and Technology77 Cheongam-RoNam-GuPohang 37673Republic of Korea Advanced Institute for Materials Research(WPI-AIMR) Tohoku UniversitySendai980-8577Japan Institute for Convergence Research and Education in Advanced Technology Yonsei UniversitySeoul03722Republic of Korea

This study demonstrated the potential for customizing the desired properties of the Co18.5Cr12Fe55Ni9Mo3.5C2(at.％)ferrous medium-entropy alloy by manipulating the deformation-induced martensite transformation(DIMT)behavior at liquid nitrogen *** was achieved by modify-ing various initial microstructures through annealing at temperatures ranging from 900 to 1200 ℃.The variations in DIMT kinetics were analyzed based on two main factors.(1)Inducing carbide precipitation by annealing at 900 and 1000 ℃ results in changes in the composition within the matrix,which may affect the stability of the face-centered cubic *** with a higher volume fraction of the carbide precipitates exhibit lower ΔGFCC→BCC and faster DIMT kinetics.(2)The onset and kinetics of DIMT are also affected by the use of martensite nucleation sites,which may vary depending on the presence of non-recrystallized regions or the grain *** fine-grained structures,martensite primarily nucleated in the non-recrystallized regions and grain ***,in coarse-grained microstructures,martensite mainly nucleated along the in-grain shear bands and their *** precise control of the microstructure results in superior *** samples annealed at 900 and 1000 ℃ with carbide precipitates and fine grains exhibit ultrahigh ultimate tensile strength,which may reach elevated values up to～1.8 GPa,while those annealed at 1100 and 1200 ℃ with larger grains and no precipitates exhibit a uniform elongation that exceeds 100％.

关键词： Ferrous medium-entropy alloy Deformation-induced martensitic transformation Microstructures Phase stability Precipitation

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Ionizing terahertz waves with 260 MV/cm from scalable optical rectification

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Light(science & Applications) 2024年第6期13卷 1075-1087页

作者： Hyeongmun Kim Chul Kang Dogeun Jang Yulan Roh Sang Hwa Lee Joong Wook Lee Jae Hee Sung Seong Ku Lee Ki-Yong Kim Advanced Photonics Research Institute GISTGwangju61005Korea Department of Physics and Optoelectronics Convergence Research Center Chonnam National UniversityGwangju61186Korea Pohang Accelerator Laboratory POSTECHPohang37673Korea Center for Relativistic Laser Science Institute for Basic ScienceGwangju61005Korea Institute for Research in Electronics and Applied Physics Department of PhysicsUniversity of MarylandCollege ParkMaryland20742USA

Terahertz(THz)waves,known as non-ionizing radiation owing to their low photon energies,can actually ionize atoms and molecules when a sufficiently large number of THz photons are concentrated in time and ***,we demonstrate the generation of ionizing,multicycle,15-THz waves emitted from large-area lithium niobate crystals via phase-matched optical rectification of 150-terawatt laser pulses.A complete characterization of the generated THz waves in energy,pulse duration,and focal spot size shows that the field strength can reach up to 260 megavolts per *** particular,a single-shot THz interferometer is employed to measure the THz pulse duration and spectrum with complementary numerical *** intense THz pulses are irradiated onto various solid targets to demonstrate THz-induced tunneling ionization and plasma *** study also discusses the potential of nonperturbative THz-driven ionization in gases,which will open up new opportunities,including nonlinear and relativistic THz physics in plasma.

关键词： optical interferometer matched

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Robust and dynamic underwater adhesives enabled by catechol-functionalized poly(disulfides) network

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National science Review 2023年第2期10卷 174-182页

作者： Chen-Yu Shi Dan-Dan He Qi Zhang Fei Tong Zhao-Tao Shi He Tian Da-Hui Qu Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Feringa Nobel Prize Scientist Joint Research CenterFrontiers Science Center for Materiobiology and Dynamic ChemistrySchool of Chemistry and Molecular Engineering East China University of Science and Technology

Developing molecular approaches to the creation of robust and water-resistant adhesive materials promotes a fundamental understanding of interfacial adhesion mechanisms as well as future applications of biomedical adhesive ***,we present a simple and robust strategy that combines natural thioctic acid and mussel-inspired iron-catechol complexes to enable ultra-strong adhesive materials that can be used underwater and simultaneously exhibit unprecedentedly high adhesion strength on diverse *** experimental results show that the robust crosslinking interaction of the iron-catechol complexes,as well as high-density hydrogen bonding,are responsible for the ultra-high interfacial adhesion *** embedding effect of the hydrophobic solvent-free network of poly(disulfides) further enhances the *** dynamic covalent poly(disulfides) network also makes the resulting materials re configurable,thus enabling reusability via repeated heating and *** molecule-engineering strategy offers a general and versatile solution to the design and construction of dynamic supramolecular adhesive materials.

关键词： adhesives supramolecular materials dynamic polymers non-covalent crosslink iron-catechol complexes

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Enhancing rheology and mechanical properties of DLP 3D-printed Si_(3)N_(4) materials via composition optimization and gas-pressure sintering

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International Journal of Minerals,Metallurgy and Materials 2025年第5期32卷 1220-1233页

作者： Qing Qin Gang Xiong Lin Han Yujuan Zhang Zhen Shen Changchun Ge Institute of Powder Metallurgy and Advanced Ceramics School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China State Key Laboratory of Multimodal Artificial Intelligence Systems Beijing Engineering Research Center of Intelligent Systems and TechnologyInstitute of AutomationChinese Academy of SciencesBeijing 100190China

Digital light processing(DLP)is a crucial additive manufacturing(AM)technique for producing high-precision ceramic *** study aims to optimize the formulation of Si_(3)N_(4)slurry to enhance both its performance and manufacturability in the DLP process,and investigate key factors such as particle size distribution,photopolymer resin monomer ratios,and dispersant types to im-prove the slurry’s rheological *** these optimizations,a photosensitive Si_(3)N_(4)slurry with 50vol%solid content was de-veloped,exhibiting excellent stability,and low viscosity(2.48 Pa·s at a shear rate of 12.8 s^(-1)).The effects of gas-pressure sintering on the material’s phase composition,microstructure,and mechanical properties were further explored,revealing that this technique significantly increases the flexural strength of the green sample from(109±10.24)to(618±42.15)*** sintered ceramics exhibited high hard-ness((16.59±0.05)GPa)and improved fracture toughness((4.45±0.03)MPa·m^(1/2)).Crack trajectory analysis revealed that crack deflec-tion,crack bridging,and the pull-out of rod-likeβ-Si_(3)N_(4)grains,are the main toughening mechanisms,which could effectively mitigate crack *** these mechanisms,crack deflection and bridging were particularly influential,significantly enhancing the frac-ture toughness of the Si_(3)N_(4)***,this research highlights how monomer formulation and gas-pressure sintering strengthen the performance of Si_(3)N_(4)slurry in the DLP three-dimensional printing *** work is expected to provide new insights for fabricat-ing complex Si_(3)N_(4)ceramic components with superior mechanical properties.

关键词： additive manufacturing Si_(3)N_(4)slurry low viscosity pressure sintering

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Boosted Spider Wasp Optimizer for High-dimensional Feature Selection

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Journal of Bionic Engineering 2024年第5期21卷 2424-2459页

作者： Elfadil A.Mohamed Malik Sh.Braik Mohammed Azmi Al-Betar Mohammed A.Awadallah Artificial Intelligence Research Center(AIRC) College of Engineering and Information TechnologyAjman University346AjmanUnited Arab Emirates Department of Computer Science Al-Balqa Applied UniversityAl-Salt19117Jordan Department of Information Technology Al-Balqa Applied UniversityIrbid21510Jordan Department of Computer Science Al-Aqsa UniversityGaza4051Palestine Artificial Intelligence Research Center(AIRC) Ajman University346AjmanUnited Arab Emirates

With the increasing dimensionality of the data,High-dimensional Feature Selection(HFS)becomes an increasingly dif-ficult *** is not simple to find the best subset of features due to the breadth of the search space and the intricacy of the interactions between *** of the Feature Selection(FS)approaches now in use for these problems perform sig-nificantly less well when faced with such intricate situations involving high-dimensional search *** is demonstrated that meta-heuristic algorithms can provide sub-optimal results in an acceptable amount of *** paper presents a new binary Boosted version of the Spider Wasp Optimizer(BSWO)called Binary Boosted SWO(BBSWO),which combines a number of successful and promising strategies,in order to deal with *** shortcomings of the original BSWO,including early convergence,settling into local optimums,limited exploration and exploitation,and lack of population diversity,were addressed by the proposal of this new variant of *** concept of chaos optimization is introduced in BSWO,where initialization is consistently produced by utilizing the properties of sine chaos mapping.A new convergence parameter was then incorporated into BSWO to achieve a promising balance between exploration and *** exploration mechanisms were then applied in conjunction with several exploitation strategies to effectively enrich the search process of BSWO within the search ***,quantum-based optimization was added to enhance the diversity of the search agents in *** proposed BBSWO not only offers the most suitable subset of features located,but it also lessens the data's redundancy *** was evaluated using the k-Nearest Neighbor(k-NN)classifier on 23 HFS problems from the biomedical domain taken from the UCI *** results were compared with those of traditional BSWO and other well-known meta-heuristics-based *** findings indicate that,in comparison to other competing techn

关键词： High-dimensional features SWO algorithm Feature selection Optimization Machine learning

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Null Width Steering of Antenna Array

Null Width Steering of Antenna Array

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2024 IEEE International Conference on Computational Electromagnetics, ICCEM 2024

作者： Jin, Xin-Ran Wang, Shen-Yun Ding, Guo-Wen Nanjing University of Information Science and Technology Research Center of Applied Electromagnetics Nanjing210044 China

ISBN: (纸本)9798350383317

In this paper, a approach with a tunable null width of the radiation pattern is proposed and validated on a linear patch antenna array. The optimal excitation distribution (OED) is optimized by using the extended method of minimum power transmission efficiency. A generalized wireless power transmission (WPT) system is set up by using the pre-extracted electric fields of each antenna element on a far-field arc. By minimizing the power transmission efficiency (PTE) of the WPT system, a null pattern of the antenna array can be obtained. By selecting electrical fields of multiple spots covering a wide angular space, wide null pattern can be obtained. The null width is steered by the angular space of selected spots. Simulated and tested results indicate that the realized null patterns agree well with the predetermined ones. © 2024 IEEE.

关键词： Antenna arrays

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