Results 11 to 20 of about 2,055 (126)

Measurement of the A-Value of the Intersystem Transition in Al II at 2670 Å: Å Progress Report [PDF]

International Astronomical Union Colloquium, 1984
Ratios of intensities of spectral lines produced in the radiative decay of collisionally-excited levels of atomic ions are versatile indicators of electron density in astrophysical plasmas when one of the lines involves a metastable level (see the review by Feldman 1981 and references therein). Radiative transition probabilities (A-values) and electron
B. Carol Johnson, H.S. Kwong
openaire   +1 more source

Optical spectrum of the post-AGB Star HD56126 in the wavelength interval 4010-8790 Å Å [PDF]

Astrophysical Bulletin, 2007
The optical spectrum of the post-AGB star HD56126 identified with the infrared source IRAS07134+1005 is studied in detail using high spectral resolution observations (R = 25000 and 60000) performed with the echelle spectrographs of the 6-m telescope. A total of about one and a half thousand absorptions of neutral atoms and ions, absorption bands of C2,
V. G. Klochkova, E. L. Chentsov, N. S. Tavolganskaya, M. V. Shapovalov   +3 more
openaire   +1 more source

La3+ Vacancy Mediated Enhancement of Near‐Infrared Emission in Cr3+‐Activated La2MgTiO6 Phosphors for Multifunctional Applications

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, Quan Liu, Kaiyang Li, Yang Zheng, Weijie Li, Bo Wei, Hongwei Xu, Le Zhang   +7 more
wiley   +1 more source

基于思维进化和L-M法优化BP神经网络的SF₆断路器触头电寿命评估

Gaoya dianqi, 2023
文中分析35 kV SF6断路器一相触头的动态电阻曲线的特点，提取出主触头接触行程、主触头电阻平均值、弧触头接触行程、弧触头电阻平均值和主触头分离时刻动态电阻极大值5个特征参数，分析得到随着烧蚀程度加深，主触头接触行程和弧触头接触行程减小，主触头电阻平均值、弧触头电阻平均值和主触头分离时刻动态电阻极大值增大。提出电寿命指示参数描述触头状态，采用数值表示法，1表示电寿命完好，0表示电寿命完结。以5个特征参数为输入，电寿命指示参数为输出，基于BP神经网络建立电寿命评估模型 ...
马飞越, 黎炜, 王尧平, 王羽, 刘博, 马文长, 刘北阳, 黄河   +7 more
doaj  

Pre‐Established Zincophilic Na2SiO3 Decorated Array‐Like Channels to Regulate the Zn2+ Flux and Interfacial Corrosion for Dendrite‐Free Zinc Anode

Rare Metals, Volume 45, Issue 6, June 2026.
ABSTRACT Aqueous zinc‐ion batteries (AZIBs) have attracted increasing attention in energy storage owing to their high energy density, low redox potential, and cost‐effectiveness. Nevertheless, uncontrolled dendrite accumulation, gas generation, and severe side‐reaction problems hinder the cycling lifespan, which prevents their commercial applications ...
Xiangzhong Kong, Jun Cao, Yanting Cai, Yuyang Ding, Zicong Wang, Liya Rong, Xi Chen, Zhongmin Wan, Jiande Lin   +8 more
wiley   +1 more source

Architecting a Robust Yarn‐Like CNT Framework for Structurally Resilient ZnSe Anodes in Potassium–Ion Batteries

Rare Metals, Volume 45, Issue 6, June 2026.
ABSTRACT The development of structurally stable anodes with high capacities and long cycle lives is essential for the development of potassium–ion batteries. Conversion‐type anodes have attracted considerable attention in potassium–ion batteries (PIBs) due to their high theoretical capacities.
Jeong Ho Na, Hyun Jin Kim, Daiha Shin, Hong Geun Oh, Yun Jae Lee, Haeseong Jang, Jiung Cho, Seung‐Keun Park   +7 more
wiley   +1 more source

From Molecular Motion to Macroscopic Function: Tailoring Tetraarylethylene Supramolecular Architectures for Aggregation‐Induced Emission and Wave Absorption

Rare Metals, Volume 45, Issue 5, May 2026.
ABSTRACT Integrating light emission and electromagnetic wave (EMW) absorption into a single material opens up possibilities for multienvironmental applications. Herein, we propose a novel “molecular engineering‐pyrolysis conversion” strategy to construct a bifunctional system with tunable photoluminescence and efficient EMW absorption performance.
Renjie Wang, Zhanming Wu, Zengjihong Zhao, Hongbin Lu, Yongfeng Liu, Zhiqiang Li, Xiaojun Zeng, Shouzhi Pu   +7 more
wiley   +1 more source

Interfacial Engineering of Sodiophilic Metal Layers on Liquid Alloys for Dendrite‐Free Sodium Metal Anodes

Rare Metals, Volume 45, Issue 5, May 2026.
ABSTRACT Sodium metal batteries hold significant promise for large‐scale energy storage due to the high theoretical capacity and abundant sodium sources, yet sodium‐metal anodes are hindered by dendrite propagation, unstable solid electrolyte interphase, and poor cycling efficiency arising from uneven Na deposition and volume changes.
Nan Xing, Mengnuo Fu, Ran Niu, Haipeng Wang, Xinxin Wang, Zhiyong Mao, Chenlong Dong, Jingjing Chen   +7 more
wiley   +1 more source

简略寿命表的电子计算机程序设计(BASIC语言)

Zhongshan Daxue xuebao. Yixue kexue ban, 1982
寿命表是研究居民健康状况,制定人口规划等的重要方法。寿命表中各项指标可以反映同时出生的一代人的死亡和生存规律。这些指标不受人口年龄构成的影响,可直接用于不同人群中的比较。平均期望寿命是指同时出生的一代人的平均生存年数。而去死因后的期望寿命是假设去掉了某种死因后的平均期望寿命,从而能了解各种疾病对寿命影响的程度。因而寿命表在人口学、流行病学研究等方面被广泛应用 ...
黄小兰
doaj  

High‐Cycle Fatigue Behavior and Deformation Mechanisms of Al0.5CoCrFeNi High‐Entropy Alloy by Laser Powder Bed Fusion

Rare Metals, Volume 45, Issue 5, May 2026.
ABSTRACT Laser powder bed fusion (LPBF) can fabricate high‐entropy alloys (HEAs) with refined microstructure and enhanced mechanical properties. However, the deformation and fatigue mechanisms of Al‐containing HEAs produced by LPBF remain unclear. In this work, we systematically investigate the tensile properties, deformation mechanisms, and high‐cycle
Dan Zheng, Pengda Niu, Kefu Gan, Tiechui Yuan, Ruidi Li   +4 more
wiley   +1 more source