Results 61 to 70 of about 116,687 (175)
Gaoya dianqi, 2023 温度分布是直流电缆运维检修的重要参数之一。由于高压直流输电起步较晚，高压直流电缆的研究不如交流电缆丰富、深入，因此对其温度分布影响因素的研究具有重要意义。通过Comsol有限元软件建立二维对称模型，计算±500 kV高压直流XLPE电缆稳态运行时的温度分布，求出适合电缆长期运行的载流量，并从载流量和环境温度两方面研究温度分布变化。仿真结果表明：载流量对温度分布变化具有较大的影响，当环境温度高于15℃时，导体温度约束载流量大小，环境温度低于15℃时，绝缘层最大允许温差约束载流量大小 ...
吴晶晶, 陈丽安, 严有祥, 赵鹏
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Kinetic Study of Oxidation of Zinc Sulfide Pellets I : Analysis based on the Core Model [PDF]
, 1983 The oxidation of zinc sulfide pellets was studied by use of a thermobalance at temperatures between 590℃ and 960℃. Assuming that the reaction proceeds in topochemical manner, experimental results were analyzed based on the core model to show the effects ...
伏間 正一 +4 more
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Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Forests worldwide are increasingly impacted by drought due to climate change, prompting plants to adapt through dehydration tolerance (DT) and avoidance (DA), two distinct physiological strategies.
Xingyun Liang +11 more
wiley +1 more source
Gaoya dianqi, 2020 利用有限元软件对40.5 kV瓷支柱绝缘子在温度剧变条件下的机械性能进行了仿真研究,包括温度剧变产生的温度应力以及对弯曲载荷和扭转载荷的影响,温度范围为-40～+80℃（初始温度为20℃）。研究发现,在低温或者高温条件下,瓷支柱绝缘子不同介质的连接位置均会出现明显的应力集中现象;同时,在施加弯曲载荷时,高温会使瓷支柱绝缘子承受更大的应力,而在低温时应力会随温度的降低而减小;而在施加扭转载荷时,瓷柱的不同位置在不同温度下所承受的应力有所不同,上瓷根所受应力随温度升高而减小,下瓷根所受应力随温度升高而升高 ...
王博 +6 more
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, 1998 本稿では，国際単位系の基本単位ケルビンで測定される物理量，熱力学的温度の導入のための教程を考察する。この教程では，温度という物理量の存在から出発して，特別な温度である熱力学的温度の定め方，測定方法，単位の選択まで，中等高等科学教科書にみられる各種の導入法を比較吟味しながら，一貫して記述する。そこで，それぞれの導入法では，どこを省略しどこに問題点があるかなどが，あぶり出される。熱力学的温度の理解のために，学習者にとってわかりにくく注意すべき諸点を論述し明らかにする。ここまでの論証に必要な重要項目は ...
Satoshi Taguchi +3 more
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Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Studies have shown that organisms may adjust metabolic rates in response to thermal variability, highlighting metabolic plasticity as a key adaptive mechanism. Understanding the extent of metabolic plasticity of an organism is key to predicting its adaptation to climate
Qian Hu +6 more
wiley +1 more source
Radiant Cooling of Geometrically Simple Shape Bodies : Characteristic value varies with temperature [PDF]
, 1958 In the present paper, the author tried to revise the Bachmann chart based on the Newtons\u27 cooling law. The author applied the approximate method owing to prof. Kawashimo (Tokyo Insti. of Techn.) by considering the variation of the Characteristic value
井村 定久
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Success of restoration strategies in preventing extirpation of 2 critically endangered coral species
Conservation Biology, EarlyView.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, 2018 户外设备长期工作在高温高湿、低温高湿等情况下,极易形成凝露,危害电路设备的正常运行。针对上述现象,文中在人工环境气候室内搭建了真型开关柜凝露试验系统,记录了不同温差及相对湿度条件下凝露形成时间,并测量了未形成凝露时的柜体内壁温度。结果表明:凝露形成时间是由温差和相对湿度共同影响的,当相对湿度不变时,温差越大,凝露形成时间越短;而当温差不变时,相对湿度越高,凝露形成时间也越短;并且,形成凝露的露点温度始终高于物体表面温度。最后,提出可通过减小温差 ...
郭沁 +4 more
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