Results 21 to 30 of about 992,119 (152)
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT In laser‐directed energy deposition (LDED) of TiC/Ti6Al4V composites, a low content of micron‐sized TiC provides a good strengthening effect on hardness and strength, but the improvement in plasticity remains a challenge. By introducing synchronous ultrasonic impact treatment (UIT) into the LDED process, an ultrasonic‐assisted LDED (UA‐LDED ...
Yuzhou Zeng +9 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2021 采用有限元软件ABAQUS建立了用于模拟预应力组合梁在火灾下全过程受力行为的模型,研究拉索防火涂层对预应力连续组合梁抗火性能的影响。考察组合梁跨中挠度、拉索应力及塑性应变随温度的变化,分析了预应力组合梁在高温下的温度变化和破坏模式。结果表明:钢梁下翼缘与腹板升温较快,二者温差很小,而腹板与上翼缘的温差较大;混凝土截面各测点处升温速率由下至上依次降低,上表面与下表面的最高温度差可达约700℃;当拉索有5 mm厚防火涂层时,在升温前期其温度随时间延长而上升的幅度比无防火层时温度上升的幅度要小,同一升温时间下,
周焕廷 +5 more
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Dianci bileiqi, 2003 研究了制造过程中的升温速度、烧结温度、保温时间及冷却速度对氧化锌压敏电阻片电位梯度的影响,对氧化锌压敏电阻片的烧结工艺进行了优化,并从理论上探讨了升温速度、烧结温度、保温时间及冷却速度影响氧化锌压敏电阻片电位梯度的机理。试验结果表明,连续缓慢升温至1200℃保温3h,随炉冷至室温的烧成制度有利于获得优异的电性能。
严群, 唐俊, 陈家钊, 涂铭旌
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Functional Ecology, Volume 40, Issue 9, Page 2726-2736, September 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Decomposition is the transformation of dead organic matter into its inorganic constituents. In most biomes, decomposition rates can be accurately predicted with simple mathematical models, but these models have long under‐predicted decomposition in globally extensive ...
Heather L. Throop +8 more
wiley +1 more source
, 1986 1.引言适时准确地测出加热炉加热段钢的加热温度,控制加热温度和加热时间,对防止钢的过热,过烧和氧化脱碳是国内钢铁部门老企业技术改造挖潜节能的重要技术措施之一。目前国内广泛使用的炉温检测控制方法,多是在炉顶内壁安置热偶测量炉气综合温度,再折合到钢的表面温度,精度约5%
赵裕钤, 李红德, 高灵智
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基于IEC 60287和有限元法的高压海底电缆温度场分析方法
Gaoya dianqi, 2014 高压交联聚乙烯（XLPE）海底电缆结构复杂、敷设环境特殊,分析导体温度时需要考虑较多因素。笔者详细介绍了海缆分层及参数计算注意事项,参照IEC 60287标准进行计算,建立了海缆的精确热路模型,获得了海缆导体温度及各层温度的矩阵方程。采用有限元方法仿真了不同环境温度及负荷下的海缆温度场,环境温度在1424℃之间、电流在100500 A之间变化时,热路模型与有限元仿真获得的导体温度偏差小于0.3℃。仿真结果表明,热路模型得到的导体温度及各层温度关系的计算精度满足要求,且与外界环境温度无关 ...
段佳冰 +3 more
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Multi‐gradient warming reshapes functional traits and adaptive responses of alpine meadow plants
Functional Ecology, Volume 40, Issue 9, Page 2889-2905, September 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Plant functional traits in alpine meadows are critical indicators of ecosystem responses to climate warming, yet dynamic changes in trait networks across warming gradients and their consequences for community functions remain poorly understood.
Zhiwei Yan +6 more
wiley +1 more source
Phenology drives asymmetric responses of ecosystem productivity stability to warming and cooling
Functional Ecology, Volume 40, Issue 9, Page 2959-2971, September 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Ecosystem productivity stability is a key indicator of ecosystem functioning under climate change, but the role of cooling periods in increasingly variable climates remains poorly resolved.
Yao Wei +11 more
wiley +1 more source
Dianci bileiqi, 2015 研究了冲击老化过程中温度对压敏电压和泄漏电流的影响。研究表明,压敏电压呈现弱的负温度特性。随着冲击次数增加,压敏电压与温度的相关性有增强趋势,而且压敏电压随温度变化的波动变得明显。泄漏电流受温度影响较大。随着温度上升,泄漏电流呈指数函数上升,具有较强的正温度特性,且随着冲击次数增加,正温度特性越强。
曹洪亮 +4 more
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Insights Into the Temperature‐Dependent Oxidation Mechanism of Metallic Cerium in H2O‐N2 Atmospheres
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Metallic cerium (Ce), a widely used surrogate for actinide metals, enables mechanistic studies of reactions in complex gas environments under controlled and safer laboratory conditions. Here, the oxidation behavior of Ce in H2O‐N2 mixed atmospheres was investigated from 200°C to 350°C using in situ thermogravimetry–mass spectrometry, in situ X‐
Kun Huang +10 more
wiley +1 more source