Results 101 to 110 of about 1,288,263 (229)
Dianci bileiqi, 2019 为了解决一起500 kV GIL三支柱绝缘子炸裂故障,对故障GIL开展现场检查、返厂解体、应力仿真计算、缺陷模拟研究,采用同站运行的GIL单元为试品,开展GIL整体和关键部件工频耐压局放测试分析。研究结果表明:GIL三支柱绝缘子炸裂原因为三支柱绝缘子低电位金属嵌件与环氧树脂交界面存在小间隙,在运行过程中,小间隙逐渐劣化,导致交界面电场畸变,从局放异常发展为三支柱绝缘子炸裂。最后结合GIL三支柱绝缘子炸裂原因和三支柱绝缘子生产工艺流程提出了预防性的措施,为后续工程GIL生产运维提供借鉴。
黎卫国 +5 more
doaj
Batteries &Supercaps, EarlyView.Bi nanoparticle (NP)‐integrated nitrogen‐doped carbon (Bi@nCN) is synthesized via a scalable one‐step carbothermal reduction. Bi NPs dispersed in the carbon matrix relieve stress during the two‐phase alloying reaction, resulting in the excellent electrochemical performance even in chloride‐free electrolytes, and highlighting Bi@nCN as a key enabler for
Woo Joo No +6 more
wiley +1 more source
Gaoya dianqi, 2016 气体绝缘金属封闭输电线路（GIL）凭借着自身优势,在近年来得到很大发展。为了保证GIL使用安全,需要对其外壳接地进行合理的设计和布置。笔者介绍了GIL两种接地方式及各自特点,利用MATLAB Simulink建立三相分体式GIL等值计算模型,结合某800 kV/4 000 A GIL产品参数进行仿真计算,研究了GIL外壳电位分布特征,探究了导流排布置数量、接地点间距对外壳电位及接地点入地电流的影响。计算结果表明,GIL外壳电位呈现出端部高中间低的"V"字形分布;在GIL端部设置导流排对降低外壳电位 ...
王亚楠 +6 more
doaj
\u3cem\u3eFantassin: pour mon pays, la gloire et… des prunes\u3c/em\u3e by Charly Forbes [Review] [PDF]
, 2012 Review of Charly Forbes, Fantassin: pour mon pays, la gloire et… des prunes.
Drolet, Gil
core +1 more source
Activism as education in and through the youth climate justice movement
British Educational Research Journal, EarlyView.Abstract Young people worldwide are increasingly participating in a global movement for climate justice, yet to date, little research has examined how youth climate justice activists conceive of and experience activism as education. The present study used in‐depth, semi‐structured interviews with 16 US climate justice activists (aged 15–17) to address ...
Carlie D. Trott
wiley +1 more source
Gaoya dianqi, 2016 笔者结合实际工作中发现的两起采用超声波法检测到的GIL局部放电异常事例,介绍了如何采用超声波法对GIL设备缺陷进行定位,如何通过超声波法的结果判断GIL设备缺陷类型,通过对测试异常后的设备解体检查,以及应用X射线透视技术进行验证,准确地查找到GIL设备3支柱绝缘子存在的缺陷,为GIL设备的缺陷查找与诊断提供参考。
李红元, 陈禾, 吴德贯, 周禹
doaj
British Educational Research Journal, EarlyView.Abstract By skipping school for their cause, young climate strikers repeatedly demonstrated their priorities in 2019 and 2020. They regularly chose to sacrifice a day of their formal education in favour of collective action. This study asks what we can learn from the reflections of former youth strikers.
Loz J. Hennessy
wiley +1 more source
Biological Reviews, EarlyView.ABSTRACT Effective knowledge of ecological connectivity at sea and at the land–sea interface is key to supporting global policy goals to conserve and restore ocean biodiversity and function. However, a persistent lack of commonality in terminology and understanding around the concept of connectivity in marine ecological studies hampers its integration ...
Audrey M. Darnaude +20 more
wiley +1 more source
Extent, characteristics and policy applications of Key Biodiversity Areas
Biological Reviews, EarlyView.ABSTRACT A global standard for the identification of Key Biodiversity Areas (KBAs) was published 10 years ago to provide a unified set of criteria for identifying ‘sites of significance for the global persistence of biodiversity’. We review the initiative's origins, the KBA identification process, characteristics of the current network, threats, policy
Stuart H. M. Butchart +57 more
wiley +1 more source
Loss, persistence and reversal of phenotypic traits
Biological Reviews, EarlyView.ABSTRACT The irreversibility of complex trait loss has long been a tenet of evolutionary biology. However, this idea is increasingly at odds with the numerous documented exceptions across the Tree of Life. We synthesise this growing body of evidence across a diverse array of taxa and traits, exploring the evolutionary conditions that enable ...
Giobbe Forni +4 more
wiley +1 more source