Results 21 to 30 of about 261 (94)
Effect of Thermal Aging and Chemical Treatment on Tensile Properties of Coir Fiber. [PDF]
Effect of thermal aging and chemical treatment on the physical propertiesof coir fiber was investigated. Coir fibers were treated with sodium hydro-xide and glutaraldehyde for 2 h.
Chakradhar, R.P.S. +3 more
core +1 more source
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Fluxgate sensors with Co‐rich amorphous microwires, widely used for their low noise in magnetic field measurements, encounter significant challenges in high‐temperature environments such as well drilling and geological exploration. Prolonged thermal aging degrades the performance of Co‐rich amorphous microwires, resulting in increased noise ...
Lining Pan +10 more
wiley +1 more source
Gaoya dianqi, 2020 开关柜是电力系统中重要的电力设备,开关柜内绝缘件会受到实际工况中不同老化条件（污秽、潮湿凝露、冷热循环、热老化等）的影响而产生老化现象。为了探究不同老化条件对开关柜绝缘件绝缘性能的影响,基于开关柜运行的实际工况,综合考虑了开关柜内导电回路发热、潮湿及凝露、冷热循环、污秽等多个因素对柜内绝缘件性能老化的影响过程,通过开展不同因素组合下的模拟试验,对不同老化条件处理下绝缘件表面局放、耐压进行测量。试验结果表明,污秽老化会使绝缘子表面起晕电压及熄灭电压降低,同时降低绝缘子的耐压能力,且污秽越严重 ...
李旭 +5 more
doaj
Gaoya dianqi, 2022 复合绝缘子运行中异常发热现象频发，其中老化与表面污秽是导致发热的主要原因。文中采用有限元多物理场仿真，结合实测获得的材料参数，分别建立了正常运行、湿热老化、局部涂污及整体涂污等4种典型工况下的复合绝缘子仿真模型，根据湿热老化以及表面污秽的不同发热特征，分别建立静电、电流场两种模型。通过电场计算分析发现：湿热老化后复合绝缘子沿面电场增大、界面电场降低；局部涂污复合绝缘子在涂污处电场稍微下降；整体涂污复合绝缘子由于沿面电流增大造成电场畸变严重。通过以电介质损耗为接口的耦合热场以及电流场 ...
刘宇 +5 more
doaj
, 1992 本文讨论电子元件用环氧树脂配制中的一些问题,包括掺用阻燃环氧与添加阻燃剂等阻燃措施及其阻燃机理,对于因固化收缩与热收缩而产生的内应力的消除,以及利用偶联作用提高耐湿热老化性能等 ...
丁俊琪 +5 more
core
Conceptual trait associations predict impressions of highly variable faces
British Journal of Psychology, Volume 117, Issue 1, Page 337-355, February 2026.Abstract People form consequential trait judgements from seeing others' faces. The influential dynamic interactive theory suggests that trait judgements reflect the combined use of visual cues from faces (e.g. smiling looks trustworthy) with individuals' own conceptual trait associations (e.g.
Barbora Illithova +3 more
wiley +1 more source
, 2020 对自制室温下固化的环氧树脂胶黏剂进行了湿热环境下的加速老化试验。在 70℃，相对湿度 65%、 75%、 85% 和 95% 四个环境下，分别进行了 30 天的老化试验。老化试验之后对胶黏剂试样进行了动态机械热分析（DMA）。温度谱表明，在高温高湿条件下，高温对胶黏剂的后固化增强作用和湿度对其的弱化作用同时存在，但增强作用远大于弱化作用，经过不同湿度老化后的试样储能模量 E' 均较未老化时增大。频率谱表明，未老化试样和在相对湿度 65%， 75%， 85%， 95% 老化 30 天后的试样，在不同温度（
关 龚, 卉 李
core +1 more source
Beyond Motivation: Modeling the Predictive Role of L2 Pride in Informal Digital Learning of English
International Journal of Applied Linguistics, Volume 35, Issue 4, Page 1938-1952, November 2025.ABSTRACT This study investigates the role of second language (L2) pride—an understudied affective factor—in shaping learners’ language learning motivation and involvement with informal digital learning of English (IDLE). Drawing on questionnaire data from 1388 Chinese university EFL students, the study employs structural equation modeling to examine ...
Minlin Minny Zou +3 more
wiley +1 more source
Mechanistic Studies on Room Temperature Seed-Mediated Growth Process of Gold Nanoparticles [PDF]
, 2011 金纳米粒子的制备、性质和应用研究是科学史上最古老和最具生命力的研究课题之一。金纳米粒子性质和应用研究的开展很大程度上依赖于粒径、形状和晶面可控的金纳米粒子制备方法的开发和改进。晶种生长方法已经广泛应用于各种形状金纳米粒子的可控制备。但是，晶种生长方法至今仍然存在着一些缺点和不足，例如特定形状金纳米粒子在产物中的含量达不到性质和应用研究的要求，多数制备过程的重现性较差，特定形状金纳米粒子可控制备方法的开发和改进过程缺乏指导性理论等。 究其原因是由于晶种生长过程是在非平衡条件下进行的复杂的动力学过程 ...
尹秉胜
core
Integrative Conservation, Volume 4, Issue 3, Page 430-441, September 2025.Our study identifies southern China, including mountainous regions and islands, as key areas rich in phylogenetic diversity, and phylogenetic endemism of lizards that are currently under‐protected. Current protected areas however do not adequately cover regions that are critical for preserving the evolutionary history of lizards.
Tao Liang (梁涛) +8 more
wiley +1 more source