Results 31 to 40 of about 13,964 (117)
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT A central challenge in high‐performance photoelectrochemical (PEC) systems is mitigating the intrinsic limitations in photogenerated carrier separation and transport, while enabling efficient broad‐spectrum solar harvesting. Inspired by the synergistic effect between plasmonic resonance and heterojunction built‐in electric fields, a ternary ...
Yuhan Zhang +8 more
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Gaoya dianqi, 2015 碟簧作为储能元件是高压断路器用液压操动机构的重要核心部件,其优点是能在很小变形的条件下,承受范围变化很大的载荷。储能碟簧的可靠性直接影响着液压操动机构及高压断路器的整体可靠性。笔者通过碟簧力学特性分析、碟簧应力计算、碟簧力学特性曲线试验、碟簧力学时效性试验及单片碟簧断裂后对整组碟簧性能的影响试验,验证了某高压断路器用液压操动机构储能碟簧的可靠性。
周仙娥 +3 more
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Gaoya dianqi, 2022 在干式空心电抗器的服役过程当中，水分有可能会大量地侵入包封并造成包封内绝缘的严重湿热老化而发生电抗器事故。但是目前对电抗器湿热老化并最终导致起火故障的详细过程和机理没有进行深入研究。由于湿热老化材料耐击穿性能下降，匝间绝缘在过电压的作用下有可能被击穿形成永久的匝间短路通路而发生故障，文中探讨这种短路故障发生的可能性，研究匝间过电压对匝间绝缘的影响。首先分析电抗器端口可能出现的最大过电压，然后利用链形回路计算电抗器在运行过程中可能遭受的最大匝间过电压 ...
李光茂 +5 more
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Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT High‐yield photocatalytic H2O2 production in sacrificial agent‐free pure water constitutes a critical bottleneck requiring urgent advances in energy catalysis. Although ZnIn2S4 (ZIS) exhibits favourable visible light absorption, it is plagued by severe bulk charge carrier recombination and scarce accessible surface‐active sites.
Sheng Liu +7 more
wiley +1 more source
Ultrasound in Obstetrics &Gynecology, Volume 68, Issue 4, Page 492-503, October 2026.ABSTRACT Objectives To identify potential risk factors – among maternal factors, pre‐eclampsia (PE)‐specific biomarkers and estimated risks derived from the first‐trimester Fetal Medicine Foundation (FMF) triple test – that are associated with the subsequent development of preterm PE, and to evaluate predictors of any‐onset PE using time‐to‐event ...
J. Lin +46 more
wiley +1 more source
Scientists’ warning on the global destruction of rock outcrop ecosystems
Conservation Biology, Volume 40, Issue 5, October 2026.Abstract Rock outcrops are geological formations that harbor a highly specialized biota adapted to harsh environmental conditions that differ from their surrounding landscapes. They are globally distributed, especially in old, highly weathered landscapes, and can function as habitat islands containing high levels of endemism and distinct evolutionary ...
Luiza F. A. de Paula +19 more
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Dianci bileiqi, 2007 现生产的ZnO电阻片存在残压高,压比（1.73左右）偏大等缺点,从调整侧面釉高阻层配方入手,在制造工艺基本不变的基础上,减少电阻片侧面釉高阻层配方中Li2CO3的含量,并与生产配方进行了比较。电气性能试验结果表明:1#釉配方性能稳定,ZnO电阻片加速老化性能良好,压比在1.61～1.65,非线性系数在10～13,并通过了2ms方波800A、耐受20次,4/10大电流冲击100kA、耐受2次试验。
郭文杰, 吕宏
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Jianzhu Gangjiegou Jinzhan为研究含H型钢的钢骨混凝土柱在压弯剪扭复合受力作用下的抗震性能，对7个含H型钢的钢骨混凝土柱和1个钢筋混凝土柱进行拟静力试验，探究了扭弯比、轴压比、配箍率等对试件抗震性能的影响，分析了试件在低周反复加载试验中裂缝产生和发展的规律及破坏特征，讨论了各试件的扭矩-扭率滞回曲线、骨架曲线、耗能能力、延性、刚度退化和损伤分析。结果表明：含H型钢的钢骨混凝土柱在复合受力状态下发生受扭破坏，其扭矩-扭率滞回曲线呈捏拢的S形，相较于普通钢筋混凝土试件，其承载能力和抗震性能更优。增大扭弯比、轴压比 ...
邱昕玥, 邵永健, 谢强
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Gaoya dianqi, 2017 随着高压直流输电换流阀自主化的推进,换流阀饱和电抗器逐步实现了国产化并在工程中应用。为了进一步研究换流阀饱和电抗器的性能,文中结合某型式的±500 kV换流阀饱和电抗器,对饱和电抗器的水压耐受能力、直流损耗、饱和特性、温升水平、故障电流耐受能力及冲击电压下的阻抗特性等进行了研究,并将国产和进口饱和电抗器的各项性能进行了对比。结果显示,目前国产饱和电抗器的性能与进口电抗器并无差异,且部分性能指标优于进口电抗器,这既是国内厂家依托工程逐步提高的结果,也表明该型式的国产饱和电抗器的整体性能已达到国际先进水平 ...
张雷 +4 more
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Dianci bileiqi, 2020 探索聚烯烃材料作为硬质复合绝缘子伞套基材的可能性。在聚丙烯和聚乙烯混合树脂中添加阻燃剂、硅油、抗氧化剂等助剂制成聚烯烃材料,评估其机械、电气和憎水性等性能;进一步将聚烯烃材料用作伞套制成棒型悬式绝缘子,开展芯棒材料试验、装配好的芯棒的负荷-时间试验等设计试验,干雷电冲击耐受电压试验、湿工频耐受电压等型式试验。结果表明:聚烯烃绝缘子的主要机械性能和电气性能满足GB/T 19519—2014《架空线路绝缘子标称电压高于1 000 V交流系统用悬垂和耐张复合绝缘子定义、试验方法及接受准则》的要求 ...
史佳 +5 more
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