Results 31 to 40 of about 86,373 (159)
Gaoya dianqi, 2021 SF6替代气体在电力设备中的应用研究越来越广泛,其中氟化腈C4F7N被认为是目前最具潜力实现SF6替代的气体之一。文中结合隔离开关断口结构,研究了C4F7N/CO2二元混合气体的雷电冲击绝缘特性。基于混合气体绝缘试验平台,重点分析了气体种类,电压极性、充气气压、电极距离、C4F7N占比对50%击穿电压的影响规律。试验结果表明:在研究范围内,50%击穿电压随着充气气压、电极距离和C4F7N占比的增大均呈升高趋势。当充气气压升高到100、150、200 k Pa时,对应50%击穿电压（20:80,15 mm）
霍鹏 +6 more
doaj
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Arsenic presents a critical duality as both a hazardous environmental pollutant and an indispensable material for advanced semiconductor technologies. This study proposes an integrated reductive vacuum sublimation strategy, assisted by carbon and lead additives, to purify crude arsenic containing high oxygen (7.4%) and antimony (1326 mg kg−1).
Hongrui Xiang +6 more
wiley +1 more source
Gaoya dianqi, 2019 为研究低气压条件下棒—板空气间隙放电特性,利用低气压放电试验平台针对100～600 mm棒—板空气间隙在交流电压下的放电电压U50与气压P、间隙距离d的关系进行了试验,分析了2～60 kPa气压范围内P与d对U50的影响,得到了U50与P,d之间的关系曲线并提出了2～60 kPa气压范围内的放电电压校正公式。研究结果表明:在2～60 kPa气压范围内不同棒—板间隙的U50-P曲线均存在明显饱和区,随间隙距离减小饱和区向高气压方向移动,根据试验数据所得放电电压校正公式具有较高的精确度 ...
李熙, 夏喻, 陈艳
doaj
Æ E Æ Å – Reshaping the Role of Træna Fishermen
, 2022 This diploma project aims to strengthen the viability of Træna’s community by proposing an ocean research facility in the archipelago, enabling the next generation of local fishermen to collect oceanographic data while working at sea. The idea of the fisherman as oceanographer is inextricably linked to the architectural program on the island of ...
openaire +1 more source
World Water Policy, Volume 12, Issue 2, May 2026.ABSTRACT Water governance has emerged as a critical analytical framework for addressing the complexity of socioecological water systems in contexts of increasing climate vulnerability and anthropogenic pressure. This study presents a systematic review and bibliometric analysis of 50 scientific articles indexed on water governance published between 2018
Roger Pichis‐García +1 more
wiley +1 more source
Gaoya dianqi, 1997 【问】定开距和变开距压气式SF6灭弧室各自的特点是什么? 【答】定开距压气式灭弧室的特点是: （1）开距小,电弧电压低,电弧能量小,对提高开断电流较为有利; （2）压气室离弧区较远,触头间的绝缘强度较高,触头开距可稍小一些; （3）气压室内气体的利用率不如变开距的结构。为了保证足够的气吹时间,压气室的总行程就得增大; （4）压气室内的气体从喷咀内腔向外排出,喷咀的形状和尺寸受到一定的限制。
涟生
doaj
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Piezocatalytic technology utilizes mechanical strain or stress‐induced piezoelectric phenomena to produce robust internal electric fields, markedly improving the separation efficiency of e−‐h+ pairs. This method has emerged as a focal point in catalysis by removing reliance on conventional light or electrical energy via its mechanical‐to ...
Yue Zhou +5 more
wiley +1 more source
, 1999 利用双流体连续介质模型建立了高速掺气水流基本方程，通过量级分析等方法研究了高速掺气水流的压缩性准则。在定常均质掺气水流中，绝热Mach数M决定着压缩性效应的强弱: M< 0.3时流动可视为不可压的 ...
李炜, 赵建福
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Gaoya dianqi, 2016 文中以SF6/N2混合气体作为比较,研究了CF3I/N2混合气体中绝缘子在工频电压和正、负极性雷电冲击电压下的沿面闪络特性。结果表明:在0.10.3 MPa下,CF3I/N2混合气体中绝缘子的工频闪络电压和雷电冲击闪络电压均随气压升高而增大;在较低气压下,CF3I/N2混合气体中绝缘子的负雷电冲击闪络电压比正极性下要低,而当气压高于某临界值时,负极性下闪络电压又会高于正极性;绝缘子在含30%CF3I气体的CF3I/N2混合气体中的绝缘性能基本介于含20%/30%SF6气体的SF6 ...
张辉, 肖登明, 赵谡, 李冰
doaj
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT To address the issues of aluminum (Al) powder agglomeration during combustion and low oxidizer decomposition efficiency in composite solid propellants, this study utilized in situ self‐assembly technology to prepare cobalt‐based hybrid‐coated modified Al powder (Al@CZ).
Chong Chen +11 more
wiley +1 more source