Results 41 to 50 of about 1,012,899 (189)

延性損傷モデルを用いた予ひずみ材の延性き裂進展抵抗の予測手法の提案

open access: yesTransactions of the JSME (in Japanese), 2023
Mitsuru Ohata   +5 more
semanticscholar   +1 more source

Recent Advances in Spin–Orbit Torque‐Based Programmable Spin Logic Devices: Toward Flexible Implementations

open access: yesRare Metals, Volume 45, Issue 5, May 2026.
ABSTRACT The rapid expansion of data‐intensive applications has highlighted the fundamental limitations of traditional CMOS‐based von Neumann architectures, particularly in terms of power efficiency, latency, and flexibility. Spin logic devices utilizing spin–orbit torque (SOT) present a promising pathway for nonvolatile, low‐power, and in‐memory ...
Ke‐Yi Wu   +5 more
wiley   +1 more source

高线性度外延及注入GaAs Hall器件

open access: yes, 2002
讨论了外延及注入制作的薄层GaAs Hall器件如何获得高的磁线性度。GaAs Hall器件的磁线性度在高磁场下会有偏离,但可以通过外延及注入的过渡层对有源区进行补偿,在合适的有源区和过渡区的浓度和厚度分布中,可以得到在2.5T的强磁场下,±0.04 ...
郑一阳
core  

拖延、依賴、社會閒散及任務可視性之關聯:以幼保系學生為例 Procrastination, Dependence, Social Loafing and Task Visibility: A Case Study of Early Childhood Care Students

open access: yesJournal of Curriculum Studies
本研究目的在於考驗主動/被動拖延者在依賴型人格及社會閒散現象之差異,以及控制在團體課業分派下,兩者是否因高/低任務可視性而增加社會閒散現象。研究結果為:一、主動拖延者及被動拖延者之兩組模型關係相似;二、主動拖延者比被動拖延者具有較高之壓力偏好、期限因應能力及意圖拖延,較低的依賴型人格,但與被動拖延者具有相似程度之任務反感及失敗恐懼;三、對被動拖延者而言,低任務可視性組會比高任務可視性組產生較高之社會閒散現象。對主動拖延者而言,高任務可視性組則會比低任務可視性組產生較高之社會閒散現象。 The main
邱紹一 Shao-I Chiu   +1 more
doaj   +1 more source

High‐Cycle Fatigue Behavior and Deformation Mechanisms of Al0.5CoCrFeNi High‐Entropy Alloy by Laser Powder Bed Fusion

open access: yesRare Metals, Volume 45, Issue 5, May 2026.
ABSTRACT Laser powder bed fusion (LPBF) can fabricate high‐entropy alloys (HEAs) with refined microstructure and enhanced mechanical properties. However, the deformation and fatigue mechanisms of Al‐containing HEAs produced by LPBF remain unclear. In this work, we systematically investigate the tensile properties, deformation mechanisms, and high‐cycle
Dan Zheng   +4 more
wiley   +1 more source

离子束外延生长半导体性锰硅化合物

open access: yes, 2001
利用质量分析的低能双离子束外延技术得到了半导体性的锰硅化物,Mn_(27)Si_(47)和Mn_(15)Si_(26)。俄歇电子谱谐深度组分测量结果表明,在单晶Si的表面淀积了一薄层厚度约为37.5nm的Mn,另一部分Mn离子成功注入进Si基底里,注入深度为618nm。在840℃条件下在流动N_2气氛中对生长样品进行退火,X射线衍射结果表明退火后Mn_(27)Si_(47)和Mn_(15)Si_(26 ...
刘志凯   +6 more
core  

事件定时系统的自动延时补偿算法研究

open access: yesHe jishu
针对大型加速器定时系统中各节点因光纤长度差异引起的延时问题,提出了一种基于事件定时系统的深度优先多节点自动延时补偿算法,旨在解决因光纤长度差异导致的时间同步问题与长距离光纤传输带来的稳定性问题,并通过测量不同设备的触发信号到达时间,根据算法进行延时调整,采用125 MHz事件时钟,实现8 ns时间精度的延时补偿。在涉及6 m和30 m光纤长度的测试中,延时补偿成功实现了信号输出对齐,对齐精度约为5.5 ns,证明了该算法在保持不同光纤长度同步方面的有效性,该算法提高了事件定时系统的时间同步精度和稳定性 ...
彭 仲达   +3 more
doaj   +1 more source

Elastic Framework Driven Mg2+ Autocapture and Autocatalysis: Mechanistic Origin of Fast Hydrogen Release in 2LiBH4–MgH2

open access: yesRare Metals, Volume 45, Issue 5, May 2026.
ABSTRACT The protracted incubation time has long been the Achilles' heel of the promising 2LiBH4–MgH2 hydrogen storage system. Instead of the usual route‐creating heterogeneous nucleation sites to hasten MgB2 formation, we shortened both de‐ and re‐hydrogenation incubation periods by steering the Mg transformation itself.
Kai Jia   +6 more
wiley   +1 more source

厚表层Si柔性绝缘衬底上SiC薄膜的外延生长

open access: yes, 2004
利用LPCVD方法,在厚表层Si(SOL≈0.5μm)柔性绝缘衬底(SOI)(001)上外延生长出了可与硅衬底上外延晶体质量相比拟的SiC/SOI,表明SOI是一种很有潜力的柔性衬底. Raman 光谱结果表明SiC/SOI外延层比SiC/Si外延层有更大的残存应力,对此从理论上进行了解释.利用X射线衍射(XRD)、原子力显微镜(AFM)、扫描电镜(SEM)和喇曼散射光谱(RAM)技术研究了外延材料的晶体结构 ...
王雷   +5 more
core  

多钢种混用钢梁滞回性能试验研究与有限元分析

open access: yesJianzhu Gangjiegou Jinzhan
设计制作了4个H型钢梁试件,通过拟静力试验得到不同腹板高厚比以及钢种组合下钢梁的破坏形态、滞回曲线、骨架曲线以及延性等,从而评价试件的滞回性能。随后利用有限元软件ABAQUS进行模拟验证,通过参数分析进一步补充不同腹板高厚比和钢种组合对钢梁滞回性能的影响。结果表明:随着腹板高厚比的减小,钢梁的延性和耗能能力均有所提高,且增大腹板厚度对钢梁延性的提高程度大于极限承载力的提高程度;相比同钢种钢梁,多钢种钢梁极限承载力提高了17.4%,延性降低5.6%。随着多钢种钢梁翼缘强度等级的增大 ...
朱爱珠   +4 more
doaj   +2 more sources

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