Results 31 to 40 of about 79,706 (154)
Jianzhu Gangjiegou Jinzhan, 2020 双层柱面网壳的稳定承载能力通常由杆件失稳控制,而杆件中的缺陷对其临界荷载有显著影响。系统地研究了杆件缺陷、节点偏差及其二者耦合作用对不同矢跨比、不同网格数双层柱面网壳的稳定承载能力的影响程度与规律,并提出了确定杆件缺陷分布最不利分布模式的方法。主要得出如下结论:杆件中的缺陷(初弯曲、残余应力)可被等效为杆件弯曲缺陷,其形状可假设为正弦半波、幅值可取为l/400(偏安全);杆件缺陷对网壳承载能力的影响程度与网壳矢跨比、杆件长细比有密切关系,对矢跨比较大、杆件长细比较大的网壳的影响更为显著。在实际工程中 ...
肖姚, 李会军, 韩健
doaj
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
, 2013 自然界的一类生物材料比如骨头、牙齿和贝壳等在长期的演化历史中获得了非常令人瞩目的力学特性,缺陷不敏感就是其中一种。目前弹性结构中的缺陷不敏感现象已经得到了相当多的研究与讨论,但是与时间相关的粘弹性系统的缺陷不敏感特性还鲜有报道,而对于粘弹性性质明显的生物材料,这方面的研究又尤为重要。本文致力于研究一个含有与裂纹的受拉伸粘弹性条带的缺陷不敏感特性,分别基于Griffith模型与Dugdale模型给出了粘弹性条带缺陷不敏感宽度的解析表达 ...
陈磊, 陈少华
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Gaoya dianqi, 2011 为提高脉冲功率系统中高压储能电容器的可靠性,笔者利用直流下局部放电对电容器进行缺陷检测,得到直流局部放电测量数据的统计谱图,提出基于模糊数学理论识别电容器缺陷类型的方法。首先从22个统计算子中挑选出12个具有典型特征的统计算子组成特征向量,然后通过内部缺陷、接触缺陷、重叠缺陷、油质缺陷4种典型缺陷的测量,计算出每种缺陷特征向量的正态分布隶属函数。最后对未知缺陷类型的电容器进行了模糊检测和解剖验证,对含有可视气泡已知缺陷的电容器进行了检测和模糊识别,证明了系统的实用性 ...
王鹏, 吴广宁, 张依强, 张血琴
doaj
Efficient Photocatalytic Removal of Toluene by Synergistic FeCe/TiO2: Performance and Mechanism
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Efficient removal of volatile organic compounds (VOCs) in confined spaces is crucial for environments such as spacecraft and deep‐sea submarines. Metal modification is an effective strategy to enhance the light absorption capacity of titanium dioxide (TiO2) and suppress the recombination of photogenerated charge carriers.
Ke Xu +10 more
wiley +1 more source
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Fast‐charging capability is one of the crucial factors determining the application prospects of sodium‐ion batteries (SIBs). Nevertheless, the mismatched sodium storage kinetics and Coulombic efficiency (CE) in hard carbon anodes are bottlenecks in the implementation of fast‐charging SIBs. Herein, we propose a facile pre‐carbonization strategy
Qixin Liu +8 more
wiley +1 more source
Shiyou jixie, 2015 针对高温高压热采井套管失效概率高的问题，建立了含缺陷套管、水泥环和地层耦合系统有限元模型。将温度场与结构场耦合，并考虑套管强度降低，利用CAE技术计算了完整套管及缺陷套管的Von Mises应力、变形位移和塑性变形。计算得出在缺陷深度、缺陷环向开度、缺陷数量和缺陷环向分布4个结构参数中，套管缺陷深度和环向开度为影响套管强度的最敏感性参数，进行套管安全评定时建议将缺陷深度和缺陷环向开度作为缺陷最敏感性参数。研究结果可为套管安全评定奠定基础，并为揭示套管失效机理提供依据，对预防套损具有指导意义。
刘少胡 +5 more
doaj
Electron‐Donating Multifunctional Molecules: A Strategy for High‐Performance Perovskite Solar Cells
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Multifunctional molecules containing electron‐donating groups are critically important in perovskite solar cells (PSCs), including defect passivation, crystallization modulation, energy level alignment, and other functions. This review systematically examines the application and research progress of such multifunctional molecules in PSCs ...
Heng Liu +14 more
wiley +1 more source
, 2015 应用分子动力学方法,分析了石墨烯条带与单壁辅助纳米碳管的相互作用。考虑不同缺陷分布的石墨烯条带与辅助纳米碳管的相互作用,应用低温形成疏松螺旋结构,再逐渐升温形成纳米碳管的思想,发现缺陷可控纳米碳管能否成功自组装与石墨烯表面缺陷含量密切相关,分析了不同缺陷含量 ...
张存, 陈少华
core +2 more sources
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Solar‐blind ultraviolet (UV) photodetectors (SBPDs) play a critical role in applications including UV communication and fire warning systems. Gallium oxide (Ga2O3) has emerged as a promising material due to its wide bandgap and low cost, but suffers from high dark current and slow response speed caused by oxygen vacancy (VO) defects. This work
Yuhao Lin +14 more
wiley +1 more source