Results 11 to 20 of about 1,692 (112)

IMPLEMENTATION OF THE '数字素养 (SHÙZÌ SÙYǍNG)' INSTRUMENT TO MEASURE THE DIGITAL LITERACY LEVEL OF MANDARIN LANGUAGE EDUCATION STUDENTS

open access: yesJurnal Teknologi Pendidikan : Jurnal Penelitian dan Pengembangan Pembelajaran
The current presence of the internet undeniably facilitates and accelerates individuals' ability to access and disseminate information, even leading to an information explosion. To manage this situation, digital competence is required to face the 6.0 era.
Aiga Ventivani   +3 more
openaire   +1 more source

Multilayer Architecture of PVD/HVOF Coatings Enables Transition in Wear Mechanism and Enhanced Tribological Performance

open access: yesRare Metals, Volume 45, Issue 9, September 2026.
ABSTRACT TiN films deposited by physical vapor deposition (PVD) are widely used as protective films due to their high hardness and wear resistance. However, their application under high‐load conditions is limited by poor load‐bearing capacity and susceptibility to spalling on soft substrates.
Ziyu Wang   +6 more
wiley   +1 more source

In Situ Investigation on the Roles of Microstructural Characteristics in Fatigue Anisotropy and Crack Propagation of LPBF–IN718 Alloy

open access: yesRare Metals, Volume 45, Issue 7, July 2026.
ABSTRACT Laser powder bed fusion (LPBF) of Inconel 718 alloy inevitably introduces pronounced microstructural anisotropy, typified by columnar grains and robust crystallographic texture. This results in direction‐dependent fatigue behavior, raising critical reliability concerns for high‐stakes aerospace applications.
Zhifang Shi   +9 more
wiley   +1 more source

Complexion‐Mediated Dislocation Transfer Enables Exceptional Strength‐Toughness Synergy in Multicomponent‐Alloy Bonded Hardmetal

open access: yesRare Metals, Volume 45, Issue 5, May 2026.
ABSTRACT The inherent brittleness of hardmetals stems from the rigid covalent bond in the ceramic matrix and the sharp ceramic/metal interface, which restricts the nucleation and motion of dislocations. In this study, a novel strategy is proposed to activate significant dislocation behaviors in the WC matrix by employing a non‐equiatomic CoNiFeCr ...
Cheng Qian   +9 more
wiley   +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

高压开关传动系统关键零件的疲劳强度分析与寿命估算

open access: yesGaoya dianqi, 2013
零件疲劳分析与计算对高压开关设备寿命预测起着至关重要的作用。笔者分析了高压开关传动系统关键零件疲劳的特点;建立了零件疲劳极限应力图模型,采用该模型可以计算出零件的疲劳极限与疲劳安全系数,并且可以估算在考虑安全系数前提下零件的疲劳寿命;以某高压断路器传动连杆的疲劳计算为例,对所采用的方法进行了验证。得出了3点结论:①有必要对高压开关零件进行疲劳分析和计算;②借助零件疲劳极限应力图可以较好地进行零件疲劳强度计算;③应力集中和零件材质对疲劳极限和寿命有较大的影响。
程立   +4 more
doaj  

Unpacking the Antecedents of Boredom and Its Impact on University Learners’ Engagement in Languages Other Than English: A Qualitative Study in the Distance Online Learning Context

open access: yesInternational Journal of Applied Linguistics, Volume 35, Issue 3, Page 1121-1133, August 2025.
ABSTRACT Although psychological factors such as emotion and engagement have gained increasing attention for their role in language learning success, a substantial gap remains in understanding the sources of boredom and its impact on learners’ engagement, whether behavioural, affective or cognitive, in languages other than English (LOTE).
Xian Zhao, Danping Wang
wiley   +1 more source

新型立柱式生产储油平台桁架管节点疲劳分析

open access: yesHaiyang gongcheng zhuangbei yu jishu, 2018
研究平台管节点疲劳强度的谱分析法,根据南海海况进行某新型立柱式生产储油平台桁架管节点的疲劳分析。结果表明平台桁架管节点的疲劳强度满足设计要求,而立柱的疲劳强度小于撑管的疲劳强度。分析比较撑管轴向力、面内弯矩和面外弯矩各自对疲劳损伤的贡献,结果表明斜撑管的疲劳损伤主要由轴向力造成,水平撑管的疲劳损伤主要由面内弯矩造成,而面外弯矩对撑管造成的疲劳损伤较小。
马网扣, 刘军
doaj  

Military unmanned aerial vehicle operations through the lens of a high‐reliability system: Challenges and opportunities 从高可靠性系统视角看待军用无人机操作:挑战与机遇 Operaciones de vehículos aéreos militares no tripulados a través de la lente de un sistema de alta confiabilidad: desafíos y oportunidades

open access: yesRisk, Hazards &Crisis in Public Policy, Volume 15, Issue 3, Page 347-373, September 2024.
Abstract This study examines the impact of regulations and standard procedures on safety outcomes in unmanned aerial vehicle (UAV) operations, specifically focussing on Norwegian military UAV systems, from a high‐reliability organization (HRO) perspective. By analyzing data from existing regulations, accident reports, and interviews with military drone
Riana Steen   +2 more
wiley   +1 more source

复杂应力状态下桩腿节点多轴疲劳寿命评估

open access: yesHaiyang gongcheng zhuangbei yu jishu, 2015
引入了一种多轴疲劳寿命评估方法,并对该方法的疲劳评估流程进行研究.使用该方法联合热点应力法对国际公开发表的250多个疲劳试验数据进行多轴疲劳寿命预测,验证了该方法多轴疲劳寿命预测的精确度.最后使用该方法成功对自升式平台K型桩腿节点进行了多轴疲劳寿命评估,可为提高桩腿节点疲劳寿命预测的准确性提供有益参考.
刘英芳   +5 more
doaj  

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