Results 21 to 30 of about 1,047,854 (148)
Jianzhu Gangjiegou Jinzhan, 2022 开展高温后水冷Q690高强钢的材性试验研究，明确高温对Q690高强钢力学性能的影响规律。在考虑材料非线性和几何非线性的基础上，将高温后水冷Q690高强钢的材性引入数值分析模型，在ABAQUS有限元软件中实现考虑屈曲后性能的Q690高强钢板梁的火灾后剩余承载性能分析。研究结果表明：暴露温度700 ℃为Q690高强钢力学性能变化的分界点。随着暴露温度的升高，fy和fu都表现出先减小后增大的规律。暴露温度对Q690高强钢弹性模量的影响较小。当暴露温度为800 ℃和900 ℃时 ...
华建民 +5 more
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Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT Low‐temperature performance degradation limits lithium‐ion batteries (LIBs) in extreme climates and specialized applications. Electrolytes govern Li+ transport and interfacial reactions, whereas their solvation chemistry controls ionic conductivity, desolvation kinetics, and interphase stability.
Yuqing Chen +7 more
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Gongye shui chuli, 1992 本文以高温酸化——中温甲烷化两相厌氧消化工艺为主,对城市污水厂污泥两相厌氧消化进行了研究。结果表明:城市污水厂污泥经0.5天高温(55 ℃)酸化,VFA可达1370 mg/l左右,高温缩短了酸化时间;高温酸化0.5天,中温(35 ℃)甲烷化8.5天,VSS去除率约达40%。
边兴玉, 肖红, 周增炎
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Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT The high‐value conversion of biomass platform molecules is a key pathway for substituting fossil resources with renewables and promoting sustainable green chemical manufacturing. However, conventional thermocatalytic processes suffer from harsh reaction conditions, high energy consumption, and poor selectivity, whereas photocatalysis enables ...
Tingting Dong +4 more
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World Water Policy, Volume 12, Issue 4, November 2026.ABSTRACT Biochemical oxygen demand (BOD) remains a core indicator of organic pollution in freshwater monitoring, but its role in water policy and practice is changing as water‐quality assessment moves toward predictive, integrative, and decision‐support approaches.
Isadora Favero Roque Cenci +5 more
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Beyond Evidence: How Framing Shapes Public Health Policies During Health Crises
Policy Studies Journal, Volume 54, Issue 4, November 2026.ABSTRACT Does the level of evidence that accompanies policy action depend on how a problem is framed, and on who frames it? This article examines these questions in the context of health crises. Bridging sociological and equivalence framing theories, it treats frames as preexisting interpretive schemes shared within communities of actors, whose ...
Antoine Claude Lemor, Eric Montpetit
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Jianzhu Gangjiegou Jinzhan, 2003 本文是针对鞍钢第二炼钢厂吊车梁加固而进行高温下高强螺栓连接性能的试验研究项目。试验中试件分别在200℃～450℃高温状态下加荷和在加温后冷却状态下加荷,得出了加热温度与滑移荷载（摩擦系数）的关系和摩擦系数的降低系数λ1与加热温度曲线的关系。最终得出在高温下高强螺栓应力松弛是促使滑移荷载下降的主要原因。提出了在200℃高温下高强螺栓连接性能是安全可靠的。
陈禄如
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Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT To improve the strength–toughness balance of IN718, and alleviate the brittleness commonly associated with refractory high‐entropy alloys, this study proposes a novel strategy to fabricate defect‐free IN718/WMoTaNb heterogeneous multiprincipal element alloy coatings via laser‐directed energy deposition.
Zhao Wang +7 more
wiley +1 more source
Gaoya dianqi, 2022 高频变压器是DC/DC变换器的重要电气元件，其内部温度过高会加速绝缘老化，准确预测高频变压器的温度分布有助于其散热设计。文中考虑温度对高频变压器材料电磁特性和空气热物理特性的影响，利用Infolytica有限元软件建立高频变压器的瞬态磁场—温度场双向耦合模型，通过仿真分析，得到高频变压器的磁密分布、损耗分布和温度分布。在此基础上，根据高频变压器的散热路径建立其等效热路模型，计算出稳态温度分布。通过比较分析可知分别使用有限元法和等效热路法得到的计算结果相吻合 ...
孙晨茜, 李琳
doaj
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Systematic studies on the fatigue deformation and damage mechanisms of nickel‐based single‐crystal superalloys (Ni‐SXs) under combined thermal and mechanical conditions remain limited, particularly regarding the influence of strain amplitude on the relative contributions of fatigue and oxidation damage.
Liyin Zhang +7 more
wiley +1 more source