Results 21 to 30 of about 8,258 (170)
Pensando - Revista de Filosofia, 2016 Não parece haver, ao menos num primeiro olhar, qualquer ponto de convergência entre a literatura de Lampedusa e a filosofia de Kierkegaard. Contudo, com um pouco mais de investigação, tal percepção revela-se falsa. Ambos os autores situam-se no século XIX e, nesse sentido, há forte conexão entre ambos a partir de uma análise histórica, filosófica e ...
openaire +2 more sources
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT The Schottky barrier height (SBH), which serves as a pivotal determinant of charge carrier injection efficiency in electronic devices, critically governs electrical behavior at metal/semiconductor interfaces. However, pronounced metal‐induced gap states at metal contact interfaces induce Fermi‐level pinning, which constrains the ...
Xiaofei Liu +10 more
wiley +1 more source
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT High‐entropy alloys (HEAs) have attracted considerable interest from researchers owing to their tunable chemical compositions, exceptional structural stability, and promising catalytic properties. However, their large‐scale application is often hindered by complex manufacturing techniques and poor durability.
Sheng Guo +9 more
wiley +1 more source
Investigation of oxygen precipitates and the stability of denuded zone in Czochralski silicon [PDF]
, 2016 铜在硅中不仅具有很大的扩散速率，而且随着温度的降低它的固溶度迅速下降，这两个特性使得铜原子很容易在器件制备过程中沉淀下来，严重影响硅片性能。虽然科研工作者们已经提出了多种工艺使硅片近表面处形成洁净区，但却很少对硅中的氧沉淀和洁净区的稳定性进行深入探讨。因此，本文通过实验分析了氧沉淀和洁净区的稳定性，得出以下结论： （1）研究了热处理方式和铜引入温度对洁净区的形成及其稳定性的影响。研究发现，只有Ramping-低-高热处理能使硅片内生成大量氧沉淀的同时有效形成洁净区。引入铜玷污后，RTP-低 ...
吕耀朝
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Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Porous NiTi alloys are widely used in biomedical and engineering fields. Using the PBF‐LB technique, the TPMS and Voronoi porous parts with a porosity of ∼67% and a minimum feature size of 0.15 ± 0.02 mm were fabricated. Although the bulk sample fabricated with the same parameters is defect‐free, μ‐CT reconstruction on the porous sample ...
Wen‐Hao Zeng +7 more
wiley +1 more source
Investigation of oxygen precipitates and copper complex in Czochralski silicon [PDF]
, 2015 用直拉法生长的单晶硅中，氧是最常见的杂质，硅材料制备过程使用的内吸杂工艺则是以氧沉淀及其诱生缺陷为基础。铜作为最常见的过渡族金属玷污之一，其沉淀及复合体将会较大程度地影响硅材料的性能。因此，研究氧沉淀和铜沉淀及其复合体在直拉硅单晶中的行为，除了具有重要的理论意义外，在实际生产中也可以提高硅器件的性能。本论文利用光学显微镜，傅立叶红外光谱仪及荧光光谱仪对不同热处理方式下硅中氧和铜的行为进行研究，得出的主要结论如下： （1）研究了线性升温（Ramping）的起始温度和升温速率对硅单晶中氧沉淀行为的影响 ...
谢婷婷
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Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT In recent years, the field of magnetic materials has witnessed a paradigm shift from single‐function applications to multifunctional integration, driven by the growing demand for smart materials in advanced technologies. Among various magnetic systems, La(Fe, Si/Al)13‐series materials have emerged as particularly promising candidates due to ...
Irfan Liaquat +2 more
wiley +1 more source
Mobilization and Sedimentary Sequestration of Molybdenum in Waters from Watershed to Estuary [PDF]
, 2015 钼(Mo)在现代海洋中含量较高(105nM)且相对保守，然而河流中Mo含量变化大，变化范围可以由小于1nM到几百nM，前人工作表明影响流域中Mo的因素是多样性的如富粘土及硫矿的河床、农业及工业、矿山排水等，在这些因素中是如何影响流域Mo的分布尚未清晰。Mo由流域向海洋输送的过程中，在河口区通常认为是保守的，但近些年发现其分布并不完全保守，那么Mo在迁移过程中是否存在水体向沉积物的富集。前人研究沉积物中Mo的富集机制提出多种看法，而未达成一致如：氧化环境下，锰氧化物吸附Mo ...
卢水淼
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On the Damage Tolerance of Diffusion Bonded Titanium–Aluminum Phase Biomimetic Composites
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT The biomimetic design principles of natural structures involve the strategic integration of stiff and compliant phases to synergistically enhance strength and toughness. Its evolutionary refined natural armor, characterized by a specialized microarchitecture, enables superior damage tolerance.
Shuai Tong +10 more
wiley +1 more source
Effect of Different Methods of Analgesia on Analgesic after Total Knee Arthroplasty [PDF]
, 2016 目的比较不同镇痛方法（局部镇痛、硬膜外镇痛、静脉镇痛、髂筋膜间隙阻滞复合静脉镇痛）对全膝关节置换术（TKA）术后镇痛的效果影响。 方法择期单侧TKA患者80例，随机分为四组：局部镇痛组（L组）、静脉镇痛组（I组）、硬膜外镇痛组（E组）、髂筋膜间隙阻滞复合静脉镇痛组（F＋I组），术中均采用腰硬联合麻醉。记录术前、术毕1、8、24、48h静息VAS评分和术前、术毕8、24、48h运动VAS评分；记录患者术后其它镇痛药物（凯酚、丁丙诺菲皮贴）的额外使用次数；记录术前、术后8、24h的IL-6和皮质醇水平 ...
郑星星
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