Results 31 to 40 of about 1,007,156 (143)
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Narrowband near‐infrared (NIR) phosphor‐converted light‐emitting diodes (pc‐LEDs) featuring low full‐width at half maximum (FWHM) and high conversion efficiency are crucial for chemical content evaluation, light therapy, and bioimaging.
Chunshen Li +4 more
wiley +1 more source
, 2010 热毛细迁移现象是流体颗粒(液滴/气泡)在非均匀温度场中由于界面温度梯度引起的非均匀界面张力驱动的运动。它不仅是流体力学中的经典问题之一,而且在诸如空间材料制备、空间流体和热管理系统等应用中也有着重要的应用。本文利用投影法求解了微重力条件下可变形液滴的轴对称热毛细迁移问题,控制方程组基于Level-set方法和连续界面张力模型。数值计算的终端迁移速度和空间实验结果相一致。计算结果表明,不同Marangoni数(Ma)情形具有相同的流场拓扑结构;但随着Ma数的增加,温度场的拓扑结构变化极大 ...
张良, 赵建福, 李晶, 李震东
core +2 more sources
基于无人机红外测试的500kV架空线路在运复合绝缘子温度场特征分析
Dianci bileiqi, 2020 为提升现场复合绝缘子红外测试判定准确率,对现场新投运的123支500 kV复合绝缘子开展基于无人机的红外测试,并提取复合绝缘子温度曲线,统计温差、温度梯度特征,对正常复合绝缘子自身不同部位温度差异的原因进行了讨论,并给出了抑制温度曲线高频干扰的方法。结果表明,现场正常复合绝缘子有相当比例温差超过2 K。正常复合绝缘子温度曲线存在高频变化分量,其来源于伞裙与芯棒之间的温差、红外图像清晰度不足产生的局部温度振荡。通过小波分解与低频分量重构,可有效抑制上述高频分量产生的温差,从而减小现场红外测试结果误判概率。
李特 +6 more
doaj
Gaoya dianqi, 2022 高频变压器是DC/DC变换器的重要电气元件，其内部温度过高会加速绝缘老化，准确预测高频变压器的温度分布有助于其散热设计。文中考虑温度对高频变压器材料电磁特性和空气热物理特性的影响，利用Infolytica有限元软件建立高频变压器的瞬态磁场—温度场双向耦合模型，通过仿真分析，得到高频变压器的磁密分布、损耗分布和温度分布。在此基础上，根据高频变压器的散热路径建立其等效热路模型，计算出稳态温度分布。通过比较分析可知分别使用有限元法和等效热路法得到的计算结果相吻合 ...
孙晨茜, 李琳
doaj
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT High‐power piezoelectric ceramics which have a wide operating temperature range are essential for sensor and actuator applications in extreme conditions. However, their development is fundamentally hindered by the inherent trade‐off among key parameters (TC, d33, Qm).
Rui Yan +10 more
wiley +1 more source
Guangtongxin yanjiu, 2018 基于一维光子晶体反射谱性能的可控性,设计了一种磁流体填充的一维缺陷型光子晶体磁场和温度传感结构。应用全矢量有限元法（FEM）对该结构的反射谱及其反射峰值随磁场和温度的变化进行了仿真研究。数值模拟结果表明,反射峰值随磁场和温度发生规律性移动。当周期为7,磁流体厚度为577.58nm时,磁场灵敏度可达136.4pm/mT,温度灵敏度可达-34pm/℃。该传感结构既具有设计简单和线性度较高的特点,又能在同一结构中分别实现对磁场/温度的测量。
徐雪影, 施伟华
doaj
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
, 2002 该文以激光熔凝表面强韧化处理为背景,应用空间弹塑性有限单元和高精度数值算法自主编制应用软件,模拟工件的瞬时温度场及残余应力场,模拟温度场时考虑液固、固固相变潜热的影响,模拟残余应力场时考虑温度梯度及相变塑性的影响,所有热物性参数和力学参数都随温度而变化,该软件能够弥补大型商用软件在这些方面的不足,这为激光材料表面改性提供力学指导奠定了良好的基础.为开发高能束强化加工工艺技术提供理论依据,从而为进一步开发出更好的应用领域提供良好条件.最后用算例验证了模型的正确性 ...
姚国凤
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Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Polycrystalline SnSe thin film materials have gained increasing attention as a promising solution for fabricating microscale, flexible, self‐powered electronic components in the field of thermoelectric (TE) materials and devices. However, it is still a great challenge to simultaneously achieve preferred crystal orientation and optimize carrier
Wenxia Li +10 more
wiley +1 more source
Rare Metals, Volume 45, Issue 1, January 2026.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