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Disasters, Volume 46, Issue 2, Page 301-328, April 2022., 2022 Active conflict settings constitute challenging operating environments for humanitarian health organisations and workers. An emerging feature of some conflicts is direct violence against health workers, facilities, and patients. Since the start of the war in 2011, Syria has endured extreme and deliberate violent attacks on health facilities and workers.
Namrita S. Singh +9 more
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Electrical response and pore structure evolution affected by cyclical plasma breakdown [PDF]
, 2023 Artificial improvement of coal seam permeability is the key to solve the low gas drainage efficiency and prevent gas dynamic disaster. Plasma based on physical discharge is one of the effective means of coal seam antireflection. However, previous studies
Baiquan LIN +3 more
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People and Nature, Volume 2, Issue 4, Page 903-912, December 2020., 2020 Abstract All eight pangolin species are threatened with extinction, largely through demand for their products including scales, meat and body parts. The demand for pangolin scales has gained attention from many conservation groups due to the large volumes involved in illegal trade.
Yifu Wang +3 more
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Gaoya dianqi, 2021 文中将两个球—球气隙串联,模拟双断口断路器模型,串联的两个气隙承受标准雷电冲击电压（1.2/50μs）,空气间隙击穿照片由相机拍摄。实验结果中的击穿现象可分为3种类型,将只有上球隙或下球隙被击穿定义为击穿类型Ⅰ;串联双球隙的非同期击穿定义为击穿类型Ⅱ;串联双球隙的同期击穿定义为击穿类型Ⅲ。进一步研究发现,3种击穿类型的成因与上下间隙的电场强度分布有关,上间隙最大场强与下间隙最大场强之比在6.9～1.52和0.8～0.2之间表现为击穿类型Ⅰ和击穿类型Ⅱ,在1.5～1.52和0.7～0 ...
李秀广 +7 more
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Discharge characteristics and discharge simulation model of long air gaps containing a floating conductor [PDF]
, 2022 Long air gaps containing a floating conductor are common insulation types in power grids. During the transmission line live-line work, the process of lineman entering the transmission line air gap constitutes a live-line work combined air gap, which is a
Gao, Jiachen <1995>
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Gaoya dianqi, 2022 SF6气体在电力绝缘设备中的应用已经非常广泛，计算多种电极结构下SF6气体临界击穿场强对于研究SF6气体放电击穿特性具有重要意义。文中针对SF6气体在多种电极结构下的放电击穿过程开展了详细的理论研究与计算分析。首先，基于已有的SF6气体击穿过程进行理论总结并加以完善；然后，引入阶段先导发展模型，针对稍不均匀电场条件下SF6气体放电击穿过程进行建模，将放电击穿分为3个主要过程：首电子产生阶段、流注初始阶段及先导发展至击穿阶段；最后，结合气体物性参数建立多种电极结构下SF6气体折合临界击穿场强计算综合模型 ...
李晓蔚 +4 more
doaj
Developmental Medicine &Child Neurology, Volume 61, Issue 3, Page E1-E35, March 2019., 2019 目的 本国际临床指南由欧洲残疾儿童学会（the European Academy of Childhood Disability，EACD）牵头制定，旨在解决发育性协调障碍（developmental coordination disorder，DCD）的定义、诊断、评估、干预以及与社会心理方面的临床应用关键问题。 方法 本指南针对五个领域的关键问题，通过文献综述和专家团队的正式讨论达成共识。为保证指南的循证基础，以“机制”、“评估”和“干预”为检索词, 对2012年更新以来提出的最新建议以及新增的“社会心理问题”和“青少年/成人”为检索词进行检索。根据牛津大学循证医学中心证据等级 (证据水平 [level of evidence, LOE]1–4) 将结果进行分类，最终转化为指南建议。并由国际 ...
Jing Hua +6 more
wiley +1 more source
Gaoya dianqi, 2021 为了解气体火花间隙开关的自击穿性能,文中从自击穿实验角度着手,对电场不均匀度进行了仿真计算,测量了两电极气体火花间隙开关不同间隙距离下的自击穿电压,通过计算相对极差和变异系数来分析自击穿电压的稳定性并进行韦布尔检验。实验结果表明,自击穿电压随间隙距离的增大而增大并近似线性关系;间隙距离是影响自击穿电压稳定性的重要因素,自击穿电压的稳定性随间隙距离的增大而增大。从自击穿稳定性角度来看,可以适当增大气体火花间隙开关的电极之间间隙距离来增强自击穿电压稳定性。
满林坤 +5 more
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Gaoya dianqi, 2023 SF6气体在电力绝缘设备中的应用已经非常广泛，研究SF6气体放电击穿特性对于计算金属突出物电极结构下SF6气体临界击穿场强具有重要意义。文中针对SF6气体在金属突出物电极结构下的放电击穿过程开展了详细的理论研究与计算分析。首先，基于已有的SF6气体击穿过程进行理论总结并加以完善；然后，引入阶段先导发展模型，针对稍不均匀电场条件下SF6气体放电击穿过程进行建模。将放电击穿分为3个主要过程，首电子产生阶段、流注初始阶段及先导发展至击穿阶段；最后 ...
赵崇智 +6 more
doaj
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Dielectric ceramics are popular for energy storage materials because of their rapid charge–discharge characteristics, whereas their low energy density and efficiency hinder their miniaturization and integration. In this work, the energy storage performance is significantly enhanced through introducing Al2O3 and TiO2 into the 0.425(Bi0.5Na0.5 ...
Qiansi Zhang +9 more
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