Results 41 to 50 of about 86,621 (160)
Biodiversity‐driven spatial conservation planning to delineate temporally stable regions
Conservation Biology, Volume 40, Issue 3, June 2026.Abstract The accelerating loss of biodiversity underscores the critical need for effective conservation strategies, particularly in the face of climate change and anthropogenic pressures. We devised a conservation planning framework that adopts a temporal stacking approach to species distribution models and landscape connectivity analyses. These models
Mattia Iannella +5 more
wiley +1 more source
Gaoya dianqi, 2009 为了研究灭弧室中物性参数的动态特性,笔者对高压SF6断路器在空载状态下压气缸与喷口喉部的压力特性进行了测试,得到压气缸与喷口喉部气体压力的特性曲线。分析了压力变化与开断时间的关系,比较了不同基压下压气缸与喷口喉部气体压力特性的变化,说明了基压对断路器灭弧室内压力的影响。
刘克彬, 林莘
doaj
"fordi før så skreiv æ Å-G". En studie om andreklassingers valg av stavemåter.
, 2023 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
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, 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
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, 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
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