Results 11 to 20 of about 8,387 (117)
Gaoya dianqi, 2020 针对KYN28A—12型交流金属封闭开关设备温升超标问题,基于温升试验结果分析了影响开关柜温升的因素,并提出优化设计方法和解决措施。通过三维建模及有限元分析,得到开关柜三维温度场和流场的分析结果,确定了以改善开关柜触头盒内部流场作为降低温升的主要措施,并设计了一种改善开关柜内流场分布的导流装置。经试验,温升符合有关标准要求,并验证了提升触头盒内部流场可以有效降低开关柜有关位置的温升。
武兴坛 +4 more
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Gaoya dianqi, 2023 高频融冰热效率高，具有实现输电线路在线融冰的发展前景，揭示融冰过程中温升与环境等因素的变化规律对于实际应用具有重要意义。文中建立了覆冰线路高频融冰模型，重点考虑了冰层下移时环境温度、风速和覆冰厚度等因素对冰层内表面温升的影响。研究结果表明：在融冰过程中，对流换热强度影响冰层内表面温升速率，风速降低、环境温度升高，对流换热强度减弱，温升速率均增大，但温升速率随覆冰厚度增大而减小。因而选择合适的环境条件和覆冰厚度时机进行融冰能有效提高温升速率和缩短融冰时间。
曾薇, 周羽生, 黄欣超, 周文晴
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Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Sodium‐ion batteries (SIBs) offer a promising, cost‐effective alternative for large‐scale energy storage due to the abundance of sodium. However, their practical deployment is challenged by sluggish interfacial kinetics and unstable interphase formation, which severely limit performance across wide temperature ranges. Here, we demonstrate that
Mingxing Zhang +10 more
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Gaoya dianqi, 2013 笔者旨在研究单面交流金属封闭开关设备和控制设备（以下简称开关柜）等效温升试验方法代替多面并柜开关柜中间柜进行温升试验的可行性,并采用等效温升试验方法对开关柜进行温升试验。基于GB/T11022—2011与GB 3906—2006中型式试验部分关于温升试验的要求,以开关柜为研究对象进行温升试验,对比分析采用单面开关柜进行温升试验与3面开关柜并柜中间开关柜通电情况下温升试验结果,并采用该温升等效试验方法对开关柜进行试验,对比分析两种通流试验方式下的试验结果。试验结果显示采用单面等效性温升试验方法 ...
贾一凡, 王博, 陆瑶, 李林峰
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Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Laser‐directed energy deposition (L‐DED) offers a flexible route for fabricating γ‐TiAl components, but the as‐deposited microstructure requires post‐processing to overcome limited deformation capability. Here, an L‐DED Ti–48Al–2Cr–2Nb alloy was subjected to solution and solution‐aging treatments.
Mengya Chu +6 more
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四川大学学报. 自然科学版, 1978 我国水轮发电机定子升温计算一直沿用30年代理论,50年代的国外公式进行平均温升计算,按这种方法计算的升温有三个问题:1.把通风与升温完全独立开来,温升计算时不考虑通风冷却条件,反映不出它们的因果关系;2.脱离实际的硬性规定温升分布是轴对称的,不仅是最高温升的地点不对,数值大小也不准确;
王世明, 欧阳全安
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World Affairs, Volume 189, Issue 4, Winter 2026.ABSTRACT Anchored on the sustainable development goals (SDGs) and the Paris Agreement, which seek to limit the global average temperature to well below 2°C above pre‐industrial levels and pursue efforts to limit the temperature to 1.5°C, this study investigates how green energy finance and environmental taxes affect environmental quality, with an ...
Mohammed Musah +4 more
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Gaoya dianqi, 2018 为研究基于红外检测的GIS内部过热缺陷严重程度的评估方法,分别在母线三相共箱结构GIS腔体内的A相和B相设置"工"字形导体,模拟GIS内部导体接触不良引起的过热缺陷,开展了不同电流下的GIS温升实验。实验中,采用电子式测温技术和红外测温技术分别对GIS内部导体以及壳体的温度进行测量。实验结果表明,模拟缺陷分别设置于A相和B相时,前者内部导体和壳体的温升均高于后者。内部导体和壳体的温升在轴向上呈现出先升高后降低的变化趋势,模拟缺陷处的温升值最大。通过分析内部导体和壳体的温升关系 ...
刘凯 +4 more
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Habitat and spatial trends of U.K. wintering waterbird populations over 50 years
Conservation Biology, Volume 40, Issue 5, October 2026.Abstract The United Kingdom is an important wintering ground for millions of waterbirds. Most U.K. wintering waterbird populations increased between 1970 and the mid‐1990s, but declined thereafter. We examined U.K. population indices in 46 wintering waterbird species in two 25‐year periods, 1970–1994 and 1995–2019, to identify which waterbird groups ...
Blaise Martay +8 more
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Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT The performance optimization of ultrahigh‐strength Cu‐15Ni‐8Sn alloy relies on controlling recrystallization and aging precipitation, which are two thermally activated processes constrained by high activation barriers. Conventional heat treatment requires elevated temperatures and prolonged holding time, inevitably leading to grain coarsening ...
Fei Tan +10 more
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