Results 21 to 30 of about 9,800 (168)

Bimetallic Mo/Fe‐Doped CoP2 Nanoleaf Array as a Bifunctional Electrocatalyst for Overall Water Splitting

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT The development of efficient and stable bifunctional catalysts remains a key challenge for green hydrogen production via electrochemical water splitting. In this study, a bimetallic Mo/Fe‐doped CoP2 nanoleaf array anchored on carbon cloth (Mo, Fe‐CoP2@CC) was synthesized from zeolitic imidazolate framework‐L (ZIF‐L) via an ion‐exchange and low‐
Xiangqun Zeng   +6 more
wiley   +1 more source

Study on Effects of the Density Current Generator by Experiment and Measurement [PDF]

open access: yes, 2004
The density current generator (Manufacturer: Nakashima Propeller Co., Ltd., Patent owner: Hitachi Metals, Ltd.) is designed to generate vertical circulation over a wide water area harnessing the density current effect.
Watanabe, Masaji, Yamatogi, Toshio
core   +1 more source

Excellent Comprehensive Electromechanical Properties in PZT‐Based Hard High‐Temperature Piezoceramics

open access: yesRare 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

Regulating TGO Nucleation and Growth of MCrAlX Coatings via Femtosecond Laser Remelting: The Role of Reactive Elements in the Oxidation Resistance

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT MCrAlX coatings are widely used as bond coats in thermal barrier coating systems to protect turbine blades from high‐temperature oxidation. However, their oxidation resistance is often restricted by uncontrolled microstructures, surface roughness, and aggregation of reactive elements (REs). In this study, high‐repetition‐rate femtosecond laser
Wei Qian   +7 more
wiley   +1 more source

252 kV三相共箱GIS母线壳体温度场分布特性研究

open access: yesGaoya dianqi, 2017
气体绝缘金属封闭开关(gas insulated switchgear,GIS)在电力系统中应用广泛,其内部触头过热会引发重大事故,因此研究其温度场分布特性具有重要意义。文中设计了252 kV GIS温升实验平台,通过实验获得了GIS母线导体、SF6气体和外壳部位的温度分布情况。针对上述实验平台建立了GIS三维物理模型和数学模型,基于有限元分析法对上述实验获得的GIS母线壳体温度场分布规律进行了仿真佐证。研究结果表明,在GIS壳体内部靠上区域,SF6气体温差较小,梯度不明显,而在GIS壳体内部下方区域 ...
金虎   +5 more
doaj  

Evolutionary and environmental determinants of heat tolerance and acclimation capacity in herpetofauna

open access: yesConservation Biology, Volume 40, Issue 1, February 2026.
Abstract Exploring heat tolerance and acclimation capacity can provide an effective approach to evaluating species’ sensitivity to extremely high temperatures due to climate warming. Despite some work on amphibian and reptile thermophysiological adaptation, related questions remain. We reviewed the literature to provide a synthesis of worldwide data on
Zijian Sun   +8 more
wiley   +1 more source

分体式油浸自冷变压器三维温度场和流场仿真与分析

open access: yesGaoya dianqi, 2021
分体自冷式变压器内部温度场的仿真分析多基于二维仿真,缺乏对油流流场影响的分析。文中建立110 kV水平分体式油浸自冷变压器的三维全尺寸模型,采用有限元分析方法仿真变压器内部温度场和流速场的分布,研究变压器本体与散热器间的水平布置距离对温度场和流速场的影响,分析变压器流场和温度场的耦合关系,并采用短路法温升试验验证仿真结果的准确性。结果表明,变压器内部热点出现在低压绕组B相两侧距绕组底部约0.68 H处,热点温度达369.7 K。随着变压器本体与散热器间的水平布置距离的增大 ...
蒋惠中   +5 more
doaj  

Filling Uniformity of AgNPs in EMI Shielding Patch Regulated by Surface Morphology

open access: yesRare Metals, Volume 45, Issue 1, January 2026.
ABSTRACT Silver nanoparticles (AgNPs) are extensively employed for electromagnetic interference (EMI) shielding owing to their remarkable conductivity, and are commonly incorporated into polymer matrices. Therefore, the uniformity of the AgNP distribution within the polymer matrix is a crucial factor that affects the EMI shielding performance.
Jie Yang   +8 more
wiley   +1 more source

单模光纤分布式喇曼温度传感系统设计

open access: yesGuangtongxin yanjiu, 2009
文章作者在对光纤背向喇曼散射温度效应进行理论分析的基础上,对基于反斯托克斯/斯托克斯散射光强比值型的光纤分布式喇曼温度传感系统作了详细的研究,对系统主要器件的要求进行了计算,研制了基于单模光纤的5 km分布式温度传感器。实验表明,系统能精确地进行分布式测温,温度分辨率为1℃,空间分辨率为2 m。
国兵, 牟志华, 姜明顺, 隋青美
doaj  

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