Results 31 to 40 of about 165,790 (164)
Dianci bileiqi, 2020 接地体短路温升是校核接地材料短路耐受性能的重要指标,但目前的短路温升计算方法主要在无散流、无传热的空气环境中进行,校核结果未能充分反映接地导体在土壤中的温升特性。笔者采用电磁-温度耦合有限元计算方法模拟短路电流作用下接地导体的散流及地中温升过程。研究发现接地体轴向地中短路温升分布具有两端高中间低的特点,且由于土壤发热与本体发热共同作用,接地体两端温升显著高于空气环境短路温升。同时,土壤电阻率增大及趋肤效应会进一步加剧端部温升。随后结合侵蚀算法模拟了接地导体的过热失效 ...
吴泳聪, 阮江军
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Wildlife Letters, Volume 4, Issue 2, Page 66-72, June 2026.Tracking with GPS and accelerometers shows that great evening bats in subtropical China use two overwintering strategies: some remain in continuous hibernation, while others switch between torpor and activity as temperatures change. This behavioral flexibility, shaped by climate, underscores the importance of protecting diverse roosting habitats for ...
Zhiqiang Wang +7 more
wiley +1 more source
A link between increased temperature and avian body condition in a logged tropical forest
Conservation Biology, Volume 40, Issue 3, June 2026.Abstract The combined effects of anthropogenic disturbances, such as logging and climate change, remain poorly understood; yet, they are the main threats to tropical biodiversity. Most tropical African countries lack long‐term climate data, so climate impacts on biodiversity cannot be assessed.
Moreen Uwimbabazi +7 more
wiley +1 more source
Representation of obligate groundwater‐dwelling copepod diversity in European protected areas
Conservation Biology, Volume 40, Issue 3, June 2026.Abstract Groundwaters sustain diverse surface ecosystems and are populated by metazoan species, mostly invertebrates, that provide fundamental ecological functions and are often of prominent conservation value due to narrow endemism and high phylogenetic rarity.
Francesco Cerasoli +7 more
wiley +1 more source
Gaoya dianqi, 2015 传统交流温升试验电源系统采用电网直接供电,因此只能进行50 Hz温升试验,而无法实施60 Hz温升试验,同时,由于其自动化程度较低,在电网电压波动以及负载随温度变化的情况下,只能通过现场手动调节调压器实现电流的稳定控制,且缺乏有效的远程监控手段,不利于系统运行的综合管理。为解决上述问题,笔者结合温升试验的工艺要求以及试验室的具体试验条件,采用发电机作为温升试验电源,通过调节变频器的输出频率改变拖动电动机的转速,实现了试品对不同试验频率的需求;采用可编程控制器设计了一套温升试验自动控制系统 ...
贾一凡 +6 more
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Conservation Biology, Volume 40, Issue 3, June 2026.Abstract Human development is a driver of global change and a major threat to biodiversity. Protected areas maintain and support biodiversity, but outside stressors, such as climate change and land use change, can negatively influence natural resources within protected areas.
Leah J. Rudge +2 more
wiley +1 more source
Gaoya dianqi, 2018 为综合分析特高压直流输电用干式平波电抗器的损耗与温升,获得其热点位置与热点温升,文中推导了平波电抗器各个包封中直流电流损耗与谐波电流损耗分布的计算方法。针对一台±800 kV/4 000 A特高压干式平波电抗器,分析了加载等效直流电流的温升试验工况下电抗器的损耗分布与实际运行中包含谐波损耗的损耗分布的差异。对温升试验工况下特高压干式平波电抗器的温度场进行了计算,获得其温升分布,通过相应的温升试验,验证了仿真计算结果的可靠性;最后,比较了运行工况与温升试验工况下特高压干式平波电抗器的温升分布的差异 ...
肖彩霞, 李琳, 纪锋, 高冲
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基于热电耦合方法的800 kV GIS隔离开关温度场仿真研究
Gaoya dianqi, 2020 温升是GIS设备的重要考核指标之一,温升过高会导致设备发热严重,进而影响GIS运行的可靠性。为准确分析GIS的发热和温升,基于有限元分析软件,通过热电耦合方法,建立800 kV GIS隔离开关损耗发热的求解模型,在综合考虑导体及外壳不同的散热系数、环境温度和材料电阻率随温度变化等多种因素的基础上,计算分析隔离开关的整体温度场分布。通过温升试验,对比主要部位温升的计算值和试验值,证明了该方法的准确性,为隔离开关的设计提供了参考。
李伟 +4 more
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Harnessing social media data to track species range shifts
Conservation Biology, Volume 40, Issue 3, June 2026.Abstract Biodiversity monitoring programs and citizen science data remain heavily biased toward the Global North. Especially in megadiverse countries with limited biodiversity records, incorporating social media data can help address existing data gaps.
Shawan Chowdhury +15 more
wiley +1 more source
基于NEX-GDDP-CMIP6的不同温升情景下中国气候要素变化
Shuitu Baochi Xuebao目的全球温升对气候系统具有持续性影响，深入理解不同温升情景下气候要素的变化趋势及其空间分布特征，有助于为制定差异化的气候适应策略提供科学依据。方法基于NASA Earth Exchange Global Daily Downscaled Projections （NEX-GDDP-CMIP6）高分辨率数据，评估全球温升1.5~5.0 ℃情景下中国气候要素的变化，重点分析6个关键气候变量的变化趋势及空间分布。结果中国陆地增温速率高于全球平均水平，且相对增幅随全球温升呈加剧趋势。当全球温升1.5 ℃时 ...
温姗姗, 汪辰钰, 翟建青, 周彪
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