Results 41 to 50 of about 2,340,835 (157)
Gaoya dianqi, 2008 介绍了特高压交流架空线路用1 000 kV棒形悬式复合绝缘子电场分布计算及均压特性研究等情况,运用三维有限元法,比较了整体单支、1/3和2/3元件组串、1/6和5/6元件组串和一种1/6瓷质绝缘子及5/6复合绝缘子组串,结果可以看出,两复合绝缘子元件组串对电场分布没有任何改善,在结构上复合绝缘子采用整体单支比两元件组串的好;导线侧使用瓷质绝缘子,接地侧使用复合绝缘子组串,可以充分利用瓷质绝缘子良好的耐电弧性和复合绝缘子良好的憎水防污性,比采用整体单支复合绝缘子的电场分布均匀 ...
孙西昌 +4 more
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Gaoya dianqi, 2022 伞裙参数对复合绝缘子的性能有着决定性的影响，为在确定的绝缘距离下得到污闪性能优异的复合绝缘子，文中分别采用人工污秽试验和机器学习的方法对复合绝缘子伞裙结构参数的优化问题开展了研究。机器学习的基础是数据，文中首先对不同伞裙结构参数的12种复合绝缘子试品完成了人工污秽试验，获得了关键伞裙参数对交流污闪电压的影响以及具有优异污闪性能的伞裙参数需满足的条件；其次，为深度挖掘人工污秽试验数据的价值，文中使用RMSprop梯度下降算法建立了以复合绝缘子伞裙结构参数和表面污秽度为输入的4层BP神经网络模型 ...
李晓刚 +4 more
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Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT The composition and structural characteristics of metacomposites are crucial for tuning their negative electromagnetic parameters; however, the lack of a clear structure–property relationship severely limits their application in dielectric and magnetic fields.
Chunyuan Deng +9 more
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, 1999 本文采用集团模型和推广的Hucket分子轨道理论(EHMO)计算c-Si中Er点缺陷及Er-O复合缺陷的原子构型及电子结构。计算结果符合实验及一些文献的第一性原理计算结果,解释了Er有c ...
薛俊明 +6 more
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四川大学学报. 自然科学版, 2007 设φ:BN→BN为全纯映射,ψ∈H(BN),其中H(BN)表示BN上全纯函数集合.定义加权复合算子Wφ,ψf=ψ(fφ),f∈H(BN).作者研究了Hardy空间Hp(BN)上的加权复合算子的有界性、紧性、弱紧性.
柏宏斌, 江治杰
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Gaoya dianqi, 2020 针对复合绝缘子覆冰问题,建立了雨凇环境下复合绝缘子的传热平衡方程,并提出了临界防冰功率密度的计算方法;提出了一种光电混合涂料的制备方法:以共沉淀法制备FeMnCuO4复合金属氧化物粉末作为吸光颜料、以石墨粉作为导电颜料、室温硫化硅橡胶为基料,制备出光电混合涂料;最后对不同比例光电混合型复合绝缘子进行了覆冰试验。计算结果表明复合绝缘子临界防冰功率密度介于23.7～635.6 W/m2之间,环境温度与风速影响显著,防冰用光电混合涂层体积电阻率介于6.38×105～4.47×106Ω·cm之间 ...
舒立春 +6 more
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Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT With the development of industry, fluoride pollution has become increasingly severe. Transition metal phosphides, featuring excellent electrical conductivity and electrochemical stability, are promising electrode materials for capacitive deionization (CDI).
Pengwen Xiao +9 more
wiley +1 more source
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT In this work, In2O3 and three rare earth (RE)‐doped In2O3 composites (Ho, Yb, and Sm‐doped) were prepared via the hydrothermal method. Compared with In2O3 sensors, those fabricated from the three composite materials (RE–In2O3) exhibit varying degrees of enhanced response toward ethylene glycol (EG) gas. At 35% relative humidity (RH) and 250°C,
Chang Liu +9 more
wiley +1 more source
Gaoya dianqi, 2020 高压断路器进出线的复合空心绝缘子主体长约8～10 m,弹性模量远小于瓷绝缘子。复合空心绝缘子在强风下会产生风偏,风偏量受风速大小和工作自身弹性模量影响。大幅风偏是否会引起复合空心绝缘子内外电场强度的畸变,劣化内外绝缘鲜有研究。由于高压复合空心绝缘子成本高,投运时间短,退运下来的样品较少。文中采用有限元分析的方法模拟强风工况,进行电场计算。针对750 kV断路器复合空心绝缘子在强风下振动的1阶模态振型,计算绝缘关键区域的电场强度,阐明风偏对接地屏蔽电极附近的电场畸变的危害最大,并给出了风速阈值 ...
张楠 +7 more
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Integrative Conservation, Volume 5, Issue 2, Page 225-235, June 2026.This study used camera trap data from 6 years between 2016 and 2021 and generalized linear mixed models to explore the factors that influence the spatial density distribution of lynx and its prey populations in warm and cold seasons in Inner Mongolia Hanma National Nature Reserve, China.
Wentao Zhang +11 more
wiley +1 more source