Results 41 to 50 of about 77,688 (168)
Gaoya dianqi, 2011 针对液压机构液压系统气体污染的危害问题,介绍了高压断路器液压机构的工作原理,分析了液压系统气体污染产生的途径,重点论述了气体污染对系统运行的危害——造成渗漏油、动作时间不稳定、气蚀等现象,最后提出了防范气体污染的措施,主要从结构设计和整体布置上避免气体的存留,并采取抽真空或加装排气阀的方法进行排气处理,有效控制液压系统的气体污染。
邹高鹏
doaj
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
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Moisture‐enabled electricity generation technology offers a new paradigm for sustainable energy harvesting, but its practical applications are still limited by issues such as low output power and insufficient long‐term stability. In this paper, an asymmetric sandwich‐structured hydrogel moist–electric generator (SSHMEG) with an ion ...
Peng Chen +7 more
wiley +1 more source
Huli yanjiu, 1999 血压计橡皮气袋除用于测量血压外，还可用于临时加压输血中。方法为：于输血前将橡皮气袋紧裹于血袋的外面，准备好后，将血袋挂于输液架上。检查针柄端连接是否牢靠。需加压输血时，先阻断橡皮气袋连接血压计的通气管，然后充气至一定压力（勿过度充气），见滴速加快即可...
李晓敏
doaj
Gaoya dianqi, 2021 SF6气体因其温室效应所带来的问题被越来越多的人所重视,C5F10O（C5）、C4F7N（C4）及其与Air或CO2的混合气体被认为是目前最具潜力替代SF6的绝缘介质。文中基于搭建的可拆实验装置和平台,以板板、同轴两种典型电极结构,实验研究了均匀电场中SF6及其替代气体雷电冲击特性。结果表明:SF6、C5/Air和C4/CO2气体50%击穿电压均随充气压力的升高而增大,SF6气体的上升率最大,C4/CO2上升率最小;在同轴结构下,施加雷电冲击电压的极性对SF6和C4/CO2气体的击穿电压影响相对较大 ...
唐念 +4 more
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Success of restoration strategies in preventing extirpation of 2 critically endangered coral species
Conservation Biology, Volume 40, Issue 2, April 2026.Abstract An unprecedented marine heatwave in 2023 caused widespread coral bleaching and mortality throughout the Caribbean. In the Florida Keys (USA), 2 foundation species, elkhorn coral (Acropora palmata) and staghorn coral (Acropora cervicornis), were severely affected.
Erinn M. Muller +29 more
wiley +1 more source
Gaoya dianqi, 2013 笔者采用压阻式压力传感器和光纤压力传感器对252 kV压气式断路器空载和10 kA开断电流条件下灭弧室内的暂态气压进行了测量,得到了灭弧室内压气缸、喷口上游、喷口喉部、喷口下游4个测点的暂态气压,并对试验方法和测试系统进行了介绍。试验证明,压阻式压力传感器和光纤压力传感器均可以有效测量断路器灭弧室的暂态气压,导压管长度对测量结果的影响不容忽视。
李艳 +4 more
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Genomic responses to increased temperature and pollinator selection in Brassica rapa L.
New Phytologist, Volume 250, Issue 2, Page 1231-1247, April 2026.Summary Rapid environmental change reshapes both abiotic stress and biotic interactions, yet it remains unclear how these combined forces structure plants' genomic adaptation. In particular, the joint influence of temperature and pollinator identity, two ecological axes undergoing simultaneous global shifts, has rarely been quantified at genomic ...
Yanqian Ding, Florian P. Schiestl
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
core +1 more source