Results 11 to 20 of about 1,288,619 (148)
, 1984 1979年,日本宇航研究所的Hirano发表了一篇纤维增强层合板铺层角度优化的研究论文。他把与x轴成α_k和—α_k(k表示某一层)方向所铺设的纤维同种、数目相等、基体同一的一个层片定义为一个单层。各个单层之间可以不完全满足单层所定义的条件,这样就考虑到了由N个单层迭合起来的层合板沿厚度方向异质的情况。同时,他还限定各个单层厚度是相等的。每个单层可以取任意的角度。给出层合板的层数,寻求一组铺层角度——各个单层的角度,使临界载荷值最大。由于与迭代起始值有关,他一般是给出8种起始值 ...
吕明身
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Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Magnesium hydride (MgH2) is a promising solid‐state hydrogen storage material due to its high gravimetric capacity and excellent reversibility. However, its practical application is hindered by high thermodynamic stability and sluggish reaction kinetics.
Xingyang Chen +6 more
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Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Developing electrode materials with high capacity and outstanding activity is essential for energy storage and conversion technologies. However, integrating multiple functions into a single material remains challenging. Herein, we synthesized a novel CoP@NiCo layered double hydroxide (CoP@NiCo‐LDH) nano‐electrode using hydrothermal and ...
Ruiyu Li +9 more
wiley +1 more source
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT The limited crack resistance of coarse grain boundaries and coarse interfaces leads to an incompatibility between high‐temperature strength and ductility in TiAl alloys. Tailoring stress‐oriented textures and multiscale heterogeneous interfaces can effectively impede crack propagation, thereby overcoming this trade‐off.
Kexuan Li +7 more
wiley +1 more source
Gaoya dianqi, 2021 将介电功能梯度绝缘（d-FGI）应用在绝缘件上,可以显著改善绝缘件的电场分布,进而有效提升其绝缘性能。在d-FGI绝缘件的设计中,如何选取最佳的介电参数（电导率/介电常数）分布,是该领域研究的关键问题。文中分别采用3种不同类型的算法,对圆台绝缘子模型进行不同形式的介电参数分布优化:基于智能优化算法,对绝缘子进行双层式介电梯度优化;基于迭代优化算法,进行多层式介电梯度优化;基于拓扑优化算法,进行逐点式介电梯度优化。从优化结果中可以看出,这3种优化算法均可有效降低平行平板电极圆台绝缘子结构中电极—绝缘 ...
尹昊阳 +6 more
doaj
Glycerophosphocholine‐Mediated Dual Regulation for Highly Stable Aqueous Iron‐Ion Batteries
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Iron‐ion batteries (FeIB) offer the advantages of low cost and high capacity, demonstrating potential for large‐scale energy storage. However, severe hydrogen evolution reaction (HER) occurs during cycling, which significantly impacts battery lifespan.
Tian Yang +6 more
wiley +1 more source
Dianci bileiqi, 2022 随着城市电网电缆化率不断提高，同隧道内两回高压电缆并行敷设的线路日益增多。由于两回线路间的互相影响，可能会引起电缆护层电流过大，危及电缆安全运行。针对目前双回电缆护层电流特征并不明确的问题，建立了双回电缆护层电流计算模型，分析得到了双回电缆护层电流具有幅值相位都相同的零序特征。应用建立的模型对某双回电缆线路不同负荷时的护层电流进行了计算，计算结果与工程实测结果误差不超过9.2%,解释了该线路护层接地电流异常的原因。对不同相序下护层电流与负荷电流之间的关系进行了研究，结果表明 ...
苑玉宽 +5 more
doaj
全球能源互联网源荷预测是虚拟电厂（virtual power plant，VPP）制定未来调度计划的重要依据。提出一种基于多频组合短期源荷预测的VPP发电侧和用户侧协同优化调度方法。首先对时间序列的负荷数据进行集合经验模态分解（ensemble empirical mode decomposition，EEMD），并将其重构为高低2种频率，使用图卷积神经网络（graph convolution network，GCN）和长短期记忆网络（long short-term memory，LSTM）相结合的GCN ...
吕小红*, 刘维, 刘克恒, 蒋婧
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Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Gradient structures (GS) introduced by plastic deformation have been shown to effectively enhance the surface properties of metallic materials. However, the GS fabricated by existing methods often suffers from limited hardening depth and limited control over the GS layer, which constrain their engineering applications.
Yansong Guo +5 more
wiley +1 more source
World Water Policy, Volume 12, Issue 3, August 2026.ABSTRACT In Ghana, the government has initiated a reform in rural water management to shift away from community‐based management (CBM) to state management, but research assessing the reform is still insufficient. This study aims to critically evaluate the impact of the reform in addressing rural water challenges.
Ernestina Ohenewaah Denchie, Kevin Lo
wiley +1 more source