Results 31 to 40 of about 8,648 (125)
Abstract Green finance is widely hailed as the solution to environmental and capitalist crises, promising to address climate change and secure future returns. Yet, rather than being market‐driven, it increasingly relies on data‐intensive forecasting models and scenarios that resemble economic planning.
Giulia Dal Maso, Alessandro Maresca
wiley +1 more source
文中对电极间距为5 mm的指形电极下SF6/CF4混合气体中聚四氟乙烯绝缘表面直流闪络特性展开研究,分别测量了当SF6/CF4混合气体中SF6混合比为0%100%、压强为0.10.4 MPa时绝缘试样的直流沿面闪络电压,研究压强、混合比、电压极性等因素对绝缘试样直流沿面闪络特性的影响。实验结果表明:混合气体中SF6混合比一定时,在0.10.4 MPa气压范围内,绝缘试样的直流闪络电压随气压升高而呈线性增加;0.3 MPa的20%SF6/80%CF4气体中绝缘试样的负极性直流闪络电压为52.34 kV ...
杨明智, 林莘, 温苗, 李晓龙
doaj
Desertification is increasing in the Brazilian Semiarid, leading to loss of species and ecosystem services, while precise data on biodiversity distribution and trends are lacking. Public engagement in scientific projects can improve ecosystem protection.
Lucas Rodriguez Forti +3 more
wiley +1 more source
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
ABSTRACT Objective To evaluate the use of twin vs singleton growth charts for detecting small‐for‐gestational‐age (SGA) twins at risk of adverse neonatal outcomes. Methods MEDLINE, EMBASE, CINAHL, Cochrane and Scopus databases were searched electronically from inception to May 2024.
S. Sorrenti +9 more
wiley +1 more source
在较大分子的气体(如SF6)中,正、负电晕起始电压有明显差别,而且随着气体压强增加而增大。而在较小分子的气体(如空气)中,正、负电晕起始电压基本相同。不仅Trichel(负电晕)脉冲是有规律的,在较低气压下的SF6气体中,正电晕脉冲也是有规律的。电晕稳定效应不仅受气压影响,而且受尖端半径的影响。对于空气中的正电晕,当尖端半径很小时,击穿电压并不升高。
李尔宁, 刘延冰, 沈悦
doaj
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
doaj
Bipartisan Failures: How Political Agendas Undermine Core Ethical Principles in Emergency Management
ABSTRACT This paper examines how political agendas across the ideological spectrum compromise ethical principles in emergency management in the United States. Through a literature review and comparative fact‐based scenario analysis, it demonstrates that both conservative and liberal governments have politicized disaster declarations, resource ...
Erik Xavier Wood
wiley +1 more source
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
doaj
"fordi før så skreiv æ Å-G". En studie om andreklassingers valg av stavemåter.
The purpose of this master's thesis has been to look at the choices students in Year 2 make when spelling words. The students participating in this research are in the transition between phonological and orthographic writing, and the study will focus on how these students adopt different spelling strategies. The assignment's data material is taken from
openaire +1 more source

