Results 11 to 20 of about 1,225 (117)
Gaoya dianqi, 2022 10 kV架空线路雷击跳闸率高，适用的防雷措施少。相比于架空地线，加装耦合地线的方法具有更好的适用性。文中分析了耦合地线在10 kV架空线路中的防雷机理、安装方式和适用性，认为在现有杆塔和线型条件下应仅加装1根耦合地线。利用ATP-EMTP分别搭建了单回三角形排列和双回直线排列方式的模型，分析了在直击雷和感应雷的作用下，耦合地线对10 kV架空裸导线和绝缘导线耐雷水平的影响。结果表明，对于裸导线，安装耦合地线后的反击耐雷水平和感应雷耐雷水平可提高36.2%～86.3%，雷击导线的耐雷水平可提高4%～13.
杨鑫 +5 more
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Guangtongxin yanjiu, 2021 针对硅光芯片在应用中由于其模场较小存在耦合损耗较大的问题，文章利用一款硅光调制器芯片对其与单模光纤的耦合效率进行了研究。首先对模场匹配理论进行了分析，随后对硅光芯片以及耦合用的单模光纤进行了模场测试，提出了一种提高耦合效率的低成本耦合方式。实验结果表明，该单模光纤与硅光芯片的耦合效率达到70%。利用该方案制作了光组件并进行了四阶脉冲幅度调制（PAM4）眼图测试，得到了较好的眼图。
谭忠祥 +5 more
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Shuitu Baochi Xuebao, 2005 三峡库区春玉米盆栽水肥耦合试验研究结果表明，水分胁迫导致玉米株高和叶面积指数降低，以拔节期受到影响最大；玉米产量与生物量呈显著正相关关系，产量与根重无显著正相关关系；水氮耦合效应显著，适宜水分和中氮处理下玉米的产量最高，玉米生长发育对氮肥的吸收存在一定的阈值，过多施用氮肥会加剧土壤干旱和作物干旱，水和钾耦合效应对玉米产量影响不显著；水分是影响玉米产量的主导因素，其次是氮效应和钾效应。
吕刚 史东梅
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Dianci bileiqi, 2021 基于多导线的Agrawal场-线耦合模型,采用"两步走"方法,从理论层面研究了屏蔽线和三相线路的空间结构变化对耦合电压峰值的影响。笔者从两个方面进行讨论:1)屏蔽线的高度对耦合电压的影响,其他条件不变,发现屏蔽线越高,相线受到的屏蔽效应呈现先增大后减小的趋势。线路结构两边的两根相线在屏蔽线高度为17.05 m时,屏蔽效应达到最大;但对中间的一根相线而言,屏蔽线高度为12.05 m时,屏蔽效应最大。2)保持屏蔽线和三相线的高度不变,通过改变三相线的水平距离(屏蔽线的水平间距也随之改变 ...
宁欣婷 +4 more
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Visible‐Light‐Excited Optical Thermometry in Ca3Sc2Si3O12: Er3+ via an Efficient Eu2+ Bridge
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Er3+ ions are promising for optical thermometry due to their thermally coupled levels. However, their parity‐forbidden transitions result in weak and narrowband absorption, which restricts excitation to infrared lasers (e.g., 808, 980, or 1550 nm). Moreover, the single emission center inherently limits temperature sensitivity. In this work, we
Yi Liu +6 more
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Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Because of superior transportability and high energy capacity, methanol is regarded as a potential hydrogen carrier. Photocatalytic methanol dehydrogenation offers a sustainable and cost‐effective method for releasing hydrogen. Conventional photocatalysts face challenging obstacles, including the low catalytic efficiency and rapid ...
Rundong Chen +9 more
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Functional Ecology, Volume 40, Issue 7, Page 2128-2142, July 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Soil organic nitrogen (SON) transformation is critical for global nutrient cycling and ecosystem productivity, yet how its responsiveness to climate change differs across diverse land use types remains poorly resolved.
Xinyi Yang +10 more
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Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Engineering of the catalyst interface and modulation of transition–metal d–band play critical roles in the electrocatalytic hydrogen evolution reaction (HER). Herein, a synthetic strategy is developed to fabricate nitrogen‐doped carbon nanotubes (N–CNTs)–supported Ni3Se4–CeO2 heterojunction catalysts through a facile chemical vapor deposition (
Zhiqiang Sun +10 more
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Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Cross‐scale assembly of metal (sub) nanoparticles and/or single atoms into millimeter/nanostructured metal monolithic catalysts (Min‐SMCs) is highly appealing for sustainable water cleanup, due to energy‐efficient catalyst recyclability, high infrastructure compatibility, and low metal‐releasing risks.
Jia‐Cheng E. Yang +4 more
wiley +1 more source
四川大学学报. 自然科学版, 2010 本文采用数值模拟的方法研究了参数不均匀性,耦合和噪音的协作效应对单向耦合布鲁塞尔体系相干共振的影响作用,其中噪音仅加于无耦合的控制体系.研究结果发现:具有相同控制参数的耦合体系,在耦合和噪音协作效应的影响下,存在最佳的耦合强度使控制体系的相干共振在受控制体系中得到增强.对于不同控制参数的耦合体系,参数不均匀性,耦合和噪音的协作效应对控制体系相干共振的增强或维持起决定性的作用.另外,当耦合强度和噪音达到临界值时,参数不均匀性的作用消失,此时控制体系和受控制体系之间出现了动力学行为的同步现象 ...
施建成
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