Results 21 to 30 of about 15,349 (135)
A framework for integrating resilience indicators into risk assessments
Conservation Biology, EarlyView.Abstract Globally, ecosystems are increasingly threatened by climate change and human pressures, yet ecosystem risk assessments predominantly emphasize exposure to stressors while overlooking intrinsic ecosystem resilience—the capacity to absorb and recover from disturbances.
Benoît Pichon +4 more
wiley +1 more source
Gaoya dianqi, 2021 为掌握SF6气体的低温放电特性,保证低温环境下SF6气体设备的运行可靠性。文中开展了-50℃至20℃温度范围内,半球头棒板电极下SF6气体的工频击穿试验。同时测量了降温过程中SF6气体的气压随温度的变化。获得了稍不均匀电场中绝对气压0.7 MPa和0.5 MPa的SF6气体的放电电压随温度的变化规律。发现当温度从20℃降低到-50℃时,SF6气体的放电电压和气压均呈现先缓慢降低,再迅速降低趋势,放电电压下降趋势的拐点与气压下降趋势的拐点基本一致,计算发现该拐点温度等于SF6气体的液化温度 ...
王远东 +6 more
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Grain Boundary Density Governs the Discharge Behavior of Mg Anodes in Biodegradable Batteries
Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT Biodegradable magnesium (Mg) alloys have entered clinical use, yet their development as self‐powered absorbable batteries is hindered by poor anode performance, including high self‐corrosion, passivation, and nonuniform dissolution. The role of grain boundary density in governing discharge behavior remains unclear.
Xiaohui Shao +3 more
wiley +1 more source
Gaoya dianqi, 1996 一、概述 SF6气体断路器最初是类似空气断路器的双压式断路器。这种断路器用气泵将SF6气体压入高压贮气室,在开断时,气体从高压贮气室流入气压较低的灭弧室,从而产生气吹作用将电弧熄灭。这种断路器由于充气压力高,SF6气体易液化,使用极不方便。另外,它需要一套抽气系统,结构非常复杂。而后的压气式断路器,在开断短路电流时 ...
游一捷
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Gaoya dianqi, 2021 文中介绍了一种新型环保绝缘气体六氟丙烯（1-C3F6）,并重点研究了1-C3F6与CO2混合气体在不同电极结构和电压特性下的绝缘特性。研究表明:在均匀电场中,1-C3F6/CO2混合气体的50%击穿电压随着电极间距、气压的增加而增加,工频击穿电压随着充气压力的升高而近似线性升高,纯1-C3F6气体在1.25 bar（1 bar=100 k Pa）时的工频击穿电压与SF6接近。此外,在各个充气压力下,1-C3F6/CO2混合气体的工频击穿电压都比C5F10O/Air混合气体高。在稍不均匀电场中,1 ...
周永言 +4 more
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Sexuality, Gender &Policy, Volume 9, Issue 4, November 2026.ABSTRACT This study explores how 2SLGBTQ+ youth in Alberta, Canada—the country's most Conservative province—mobilize queer joy as a form of resistance amid rising anti‐queer and anti‐trans policies under a settler colonial, cisheteropatriarchal regime. Drawing from youth‐produced collages, we demonstrate that this visual arts‐based participatory method
JJ Wright, Gillian Robinson
wiley +1 more source
Gaoya dianqi, 1994 [问]高原环境条件有哪些特点?它对高压电器的运行性能有什么影响?[答]高原环境条件的特点主要是:气压低、气温低、气温日变化大、绝对湿度低和太阳辐射强度比较强烈.由于低气压时的低空气密度会降低空气的耐电压强度、空气的冷却效应以及弧隙的空气介质恢复强度,所以高压电器的空气绝缘耐压下降,由空气冷却的零部件温度增高,并且在空气中灭弧比较困难.气温的日变化大,可能引起高压电器的密封不易保持以及机械结构变形或开裂.低气温对高压电器因气压或空气密度降低而引起的温度增高有补偿作用 ...
涟生
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Policy Studies Journal, Volume 54, Issue 4, November 2026.ABSTRACT This paper examines how governments navigate policy legitimacy during crises through three distinct discursive processes: legitimization, delegitimization, and blame avoidance. Using a sequential mixed‐methods design, the study analyzes Denmark's decision to cull all mink during the COVID‐19 pandemic. The quantitative analysis of 947 newspaper
Olivier Rubin +3 more
wiley +1 more source
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Wearable sweat sensors face persistent trade‐offs between multiplexed detection, signal stability, and wearing comfort. Here, we present a Janus electronic skin (e‐skin) with dual‐mode functionality, offering both thermal and moisture comfort.
Zhi‐Mei Mu +12 more
wiley +1 more source
Gaoya dianqi, 2005 对纳秒脉冲（10/30ns）下真空绝缘闪络电压随气压的变化趋势进行了实验研究,探讨的气压范围介于8×10-4Pa至标准大气压之间。研究发现,当气压位于高真空区域（10-4～10-1Pa）时,随着气压的改变,绝缘闪络电压无明显变化,基本保持恒定。深入剖析真空环境下的气体解吸附过程,得出如下结论:当气压进入高真空阶段时,表面放气已成为主要气体负荷,所释放气体均源于绝缘体表面的解吸附气体。真空闪络现象,事实上是一种在绝缘体表面气体解吸附后所形成一高气密环境中发生的放电过程。
高巍, 孙广生, 严萍
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