Results 41 to 50 of about 1,225 (117)
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Precise control of chemical ordering in bimetallic nanocatalysts offers a route to decouple activity and selectivity in acetylene hydrogenation, but direct atomic‐scale evidence linking surface order to catalytic performance is scarce. Here, we tune Pd‐Cu nanoalloys from chemically disordered to highly ordered states by composition control and
Fan Xue +5 more
wiley +1 more source
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Against the backdrop of global clean energy transition and surging demand for lithium resources, lithium extraction from salt lakes presents unprecedented development opportunities. Nanofiltration (NF) membrane technology, recognized for its efficiency, energy savings, and environmental benefits, demonstrates significant application potential ...
Wen‐Feng Li +5 more
wiley +1 more source
Guangtongxin yanjiu, 2014 当前以电子作为信息载体的微电子技术遭遇到发展瓶颈。光传输具有带宽大、速率高的特点,将光子载体与电子载体相结合是未来信息传输发展的必然趋势。波导与光纤的高效耦合是实现光电子集成的关键。文章介绍了国内外几种典型耦合器的最新进展,包括楔形耦合器、GRIN（渐变折射率）透镜耦合器和垂直光栅耦合器,并对它们的性能指标、优缺点进行了比较分析,对进一步提高耦合效率的可行性进行了展望。结果表明,垂直光栅耦合器具有耦合效率高、带宽大、工艺成熟、工艺容差大和耦合步骤简单的优势,在光通信与集成光电子学领域有着广阔的应用前景。
周飞亚, 张敏明, 何岩, 刘德明
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Platinum (Pt)‐based catalysts are crucial for the commercialization of hydrogen/metal air batteries, but they suffer from Pt scarcity, high cost, and nanoparticle dissolution/agglomeration, mainly leading to performance degradation. We address this by synthesizing a PtFe alloy catalyst (PtFe–PA–NC) via a phytic acid (PA) assisted pyrolysis ...
Chenyang Shu +9 more
wiley +1 more source
Dianci bileiqi, 2016 线路避雷器和耦合地线都能有效提高输电线路的反击耐雷水平。本文应用PSCAD仿真软件建立220 k V同塔双回输电线路的仿真模型,并进行雷击暂态分析,得到耦合地线以及线路避雷器对耐雷水平的影响,并确定了耦合地线的最佳架设位置以及线路避雷器的最佳安装个数,耦合地线最佳架设位置为下层横担与塔身交点处,单相安装时,避雷器应安装在中层,两相安装时,应都安装在中层。
李景丽 +3 more
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Dianci bileiqi, 2023 针对航空四芯线缆的雷电耦合特性，将仿真分析与试验验证相结合，采用电磁仿真软件建立整机内置四芯线缆模型，依据SAE ARP 5412设置雷电激励，参照RTCA DO-160 G第22章，搭建四芯线缆雷电耦合试验平台，开展航空四芯线缆雷电耦合仿真与试验。研究了雷电进入机身内部的耦合方式、不同雷电波形的作用效果、不同的雷电电流幅值、芯线不同的端接状态等对四芯线缆雷电耦合特性的影响。研究结果表明，四芯线缆雷电耦合仿真与试验结果的时频特性趋势一致性好、但幅值存在差异。在无芯线串扰时 ...
史春蕾 +4 more
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Fe‐based amorphous alloys are attractive soft magnetic materials for next‐generation power electronics, yet simultaneously achieving high saturation magnetic flux density (Bs), low coercivity (Hc), and low core loss under scalable processing conditions remains challenging.
Zhi‐Jun Guo +10 more
wiley +1 more source
Guangtongxin yanjiu, 1990 本文从Ti:LiNbO3波导与光纤的模场分布、数值孔径以及几何尺寸三要素论述Ti:LiNbO3波导与光纤的耦合问题,并扼要介绍几种适合工程应用的高效耦合方法.
胡台光
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Gongye shui chuli, 2022 臭氧催化氧化因其具有氧化能力强、降解效果好且无二次污染等优势被广泛应用在多种工业废水处理中，成为当前工业废水深度处理领域的研究热点之一。如今大部分学者对臭氧催化氧化反应过程中的催化剂反应机理、副产物种类和反应方式等问题仍存在不同见解。通过详细查阅近年来国内外关于臭氧催化氧化及其耦合工艺研究的文献以及其他相关报道资料，分别对该工艺的性能特点和反应机理、处理工业废水的应用、相关耦合工艺以及未来发展方向等四个方面进行了详细综述 ...
李振邦 +3 more
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Guangtongxin yanjiu, 2012 文章应用ZEMAX软件模拟了管芯与光纤在不同偏移量下的耦合效率,并进行了实验验证。结果表明,6.5mm焦距的TO-CAN（晶体管外壳封装）与端面倾斜8°的光纤,在管芯偏移100μm时,耦合效率最大,模拟值为21.9%,实验值为21.32%;5.8mm焦距的TO-CAN与端面倾斜6°的光纤,在管芯偏移80μm时,耦合效率最大,模拟值为11.2%,实验值为10.42%;并且实验结果和仿真结果一致。
孟海杰 +4 more
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