Results 21 to 30 of about 977,818 (173)
ABSTRACT Objective To test the non‐inferiority of extended abdominopelvic ultrasound examination compared with contrast‐enhanced computed tomography (CT) and whole‐body diffusion‐weighted magnetic resonance imaging (WB‐DWI/MRI) in discriminating preoperatively between resectable and non‐resectable disease based on the European Society for Medical ...
D. Fischerova +26 more
wiley +1 more source
One‐Sidedness and the Inferior Function in Coriolanus and Timon of Athens
Abstract For both Jung and Shakespeare, one‐sidedness is the fundamental tragic trait. Jung proposed that as an individual develops, they inevitably associate their identity with certain modes of perception and interaction, and that this leads to psychological polarization.
Sofie Qwarnström
wiley +1 more source
Yttrium Addition Co‐Enhances the Plasticity and Corrosion Resistance of TiB2‐Refined Al‐Mg‐Zn Alloys
ABSTRACT To address the degradation of corrosion resistance induced by Al‐5Ti‐B grain refiner during the strengthening of Al‐Mg‐Zn alloys, this study innovatively employed a rare earth element yttrium (Y) alloying strategy to achieve synergistic enhancement of mechanical strength and corrosion resistance.
Wen‐Tao Qin +9 more
wiley +1 more source
ABSTRACT Ceramic capacitors are critical components in advanced electronic devices, primarily due to their multi‐functionalities in energy/information storage and conversion. However, poor temperature stability remains a long‐standing challenge for practical applications, especially at extremely high‐ or low‐temperature conditions (e.g., > 200°C or ...
Zhi‐Peng Li +7 more
wiley +1 more source
ABSTRACT Diffusion bonding (DB) of near‐α titanium alloys requires high temperatures, which can cause grain coarsening, structural deformations, and degradation of the workpiece's mechanical characteristics. In this study, thermal hydrogen processing (THP) was applied to Ti65, combined with selective magnetron sputtering of a Ti‐Al thin film to promote
Liang‐Wei Kang +9 more
wiley +1 more source
Food security in slow‐onset disasters: A policy review in Southeast Asian regions
Abstract Slow‐onset disasters, a neglected climatic event, affect the agricultural sector in Southeast Asia and threaten regional food security. Improving food security in slow‐onset disasters requires policy development by both regional and national governments.
Hiep N. Le +4 more
wiley +1 more source
在使用传统红外热像法对绝缘子进行检测时,绝缘子的劣化特征并不稳定,容易导致漏检、误检。针对这个问题,本文提出了时间序列模型与红外热像处理技术相结合的劣化绝缘子识别方法。本方法使用中值滤波与线性平滑滤波优化图像质量;采用OTSU分割法结合钢帽、盘面的形态差异将绝缘子钢帽部分进行提取,实现绝缘子钢帽温度的自动提取;考虑到绝缘子温升受到多因素影响,采用ARIMA时间序列模型对绝缘子串温度时间序列进行拟合,对其温升变化进行预测,从预测结果中找到劣化特征明显的温度曲线进行判别;试验结果表明 ...
周友维 +6 more
doaj
近年来,复合绝缘子酥朽断裂问题引起了学术界及工业界的高度重视,但断裂原因一直莫衷一是。研究表明了复合绝缘子酥朽断裂的原因可能包括湿气侵蚀、电蚀、酸性介质腐蚀等因素。针对湿气侵蚀因素,文中研究了复合绝缘子芯棒在湿热条件下的劣化过程。首先观察了芯棒湿热作用后芯棒的宏观形貌,发现芯棒呈现发黄发白的颜色,质地变得疏松,形如腐朽的木头。随后对芯棒在高湿环境下的发热情况进行了观测,发现劣化后芯棒的温升明显高于未劣化芯棒的温升。通过扫描电镜(SEM)、傅里叶红外光谱(FTIR)、热失重分析(TGA ...
王成 +5 more
doaj
本文就本世纪二十年代前后日本悬式绝缘子的劣化情况作了论述。并总结了绝缘子的劣化原固及其后来的改进措施。文中还介绍了从实际输电线路上取下来的劣化绝缘子的分析情况,提出了可供参考的绝缘子劣化的有益数据。
新宫行太, 姜惇
doaj
电力变压器匝间绝缘状态与其安全运行水平密切相关,而在实际研究中由于不能通过真实试验验证和电路分析来预测其匝间绝缘劣化情况,这一直是影响变压器状态检修的技术瓶颈。因此,文中通过数值仿真方法重现配电变压器绕组匝间绝缘劣化过程,探讨匝间绝缘劣化过程中各参数的变化规律,以探究匝间绝缘状态诊断方法。文中首先采用Ansys Electronics Desktop有限元仿真软件建立与实际变压器结构参数一致的“场—路”耦合仿真模型,将配电变压器性能参数的仿真值、解析计算值以及试验值做对比,验证模型正确性 ...
咸日常 +5 more
doaj

