Results 21 to 30 of about 10,465 (119)
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Engineering of the catalyst interface and modulation of transition–metal d–band play critical roles in the electrocatalytic hydrogen evolution reaction (HER). Herein, a synthetic strategy is developed to fabricate nitrogen‐doped carbon nanotubes (N–CNTs)–supported Ni3Se4–CeO2 heterojunction catalysts through a facile chemical vapor deposition (
Zhiqiang Sun +10 more
wiley +1 more source
1,3-对称取代方酸衍生物的分子结构、非线性光学性质及其相互关系
四川大学学报. 自然科学版, 1998 利用ＡＭ１和ＰＭ３方法研究了１，３ 对称取代方酸衍生物的分子结构、电子结构、非线性光学性质及其相互关系．从理论上证明了这类分子在不同强度的外加电场作用下的主要共振形式和电子转移机理．通过定义一套新的分子结构参数ＢＬＤ，建议了一种非线性光学系数α，β ...
王兵, 卢语晖, 孙泽民, 田安民
doaj
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Near‐infrared (NIR) phosphors with broadband and efficient emission are pivotal for the performance of NIR phosphor‐converted light emitting diodes (pc‐LEDs). In this study, the double perovskite phosphor La2MgTiO6:Cr3+ phosphor with broadband emission in the range of 650–950 nm was prepared.
Xu Qian +7 more
wiley +1 more source
Gaoya dianqi, 2015 动车组车顶绝缘子作为车顶的主要绝缘设备,其可靠性直接影响动车组的正常运行。文中基于ANSYS有限元软件分析了车顶绝缘子结构对其电场分布的影响,通过分析洁净状态下和水滴附着状态下绝缘子的电位和电场,得到伞裙结构对绝缘子电场分布特性的影响。结果表明,绝缘子顶部大小伞裙结构的不同配合方式会影响绝缘子的电场分布,尤其水滴附着状态下,绝缘子顶部采用大伞裙结构的会增加绝缘子电场强度,随着电场强度的增加,增加了绝缘子顶部发生局部放电的可能性。
张士宇 +4 more
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Zhejiang Daxue xuebao. Lixue ban, 2018 采用第一性原理研究了 Li过量情况下Cr掺杂LiZnAs体系(Li1.1(Zn1-xCrx)As) (x= 0.1)的稳定构型、磁性来源以及电子结构.首先，通过比较不同构型下Cr掺杂LiZnAs稀磁半导体体系得到稳定构型的能量，发现一定的Li过量、Cr掺杂浓度下，当掺杂的Cr原子之间的初始距离一定时，过剩的Li空位之间的距离对其构型稳定性有较大影响；其次，分析了 Cr掺杂LiZnAs的磁性来源，发现其磁性主要来源于Cr原子的3d轨道；最后，研究了 Cr掺杂LiZnAs体系的电子结构 ...
ZHANGYunli(张云丽) +5 more
doaj +1 more source
Atom Probe Tomography‐Based Analysis of Residual Trace Elements in Advanced Metallic Materials
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Residual trace elements inherited from raw materials strongly influence the mechanical and environmental performance of advanced metallic alloys and recycling materials due to preferable boundary/interface segregation and resultant embrittlement effects, yet their parts per million level concentrations pose significant challenges to ...
Congcong Li +17 more
wiley +1 more source
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT With high theoretical capacity and low cost, bismuth sulfide (Bi2S3) demonstrates considerable potential as an anode for sodium/potassium‐ion batteries (SIBs/PIBs). Unfortunately, significant volume variation, low electrical conductivity, and dissolution of polysulfides drastically weaken their intrinsic merits.
Fuyu Xiao +11 more
wiley +1 more source
四川大学学报. 自然科学版, 2012 采用密度泛函（DFT）中的B3P86方法,结合Dunning的相关一致基组cc-PVTZ,优化计算硼氢化物（BHn）(n=1～5)可能的几何构型,得出最稳定构型的几何参数、电子结构和红外光谱等性质参数,给出了最稳定结构的总能量（ET）、结合能(EBT)、平均结合能(Eav)、电离势(EIP)、能隙（Eg）、费米能级（EF）和氢原子差分吸附能(Ediff)等.结果表明硼氢化物基态稳定结构的电子态分别为:n为奇数为单重态1∑_和1A,n为偶数为双重态2A;由于B原子属于缺电子原子,能与等电子原子H化合 ...
喻凌, 伍冬兰, 曾学锋
doaj
Dianci bileiqi, 2022 为了提高高压输电线路中对绝缘子串检测的实时性,提出了一种基于YOLOv3目标检测算法网络结构的绝缘子串图像快速检测网络结构。根据高压输电线路中绝缘子串目标在图像中所占比例较大的特点,通过去除大特征图上的检测环节达到了精简原始YOLOv3网络结构的目的;同时,由于在高压输电线路中的绝缘子串一般情况下长宽比值较大,通过聚类提取出适合绝缘子串目标的先验anchor框。在darknet深度学习框架下,对原始YOLOv3网络结构和本文网络结构进行实验对比表明 ...
彭闯, 张红民, 王永平
doaj
Kinetic‐Controlled Growth of Iron Chalcogenide Nanosheets Featuring Besnus Transition
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Two‐dimensional (2D) Fe‐based nanosheets have sparked wide attention owing to exotic magnetism, superconductivity and topological phases. However, the synthesis of 2D FemXn (X = Te/Se/S, m, n: integer), typically in a non‐stoichiometric ratio, remains challenging because of narrow thermodynamic windows.
Hongmei Zhang +11 more
wiley +1 more source