Results 11 to 20 of about 2,064 (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
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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, Ya‐Hao Li, Jia Xiang, Lu‐Lu Zhang, Bo Yan, Hua‐Chao Tao, Xue‐Lin Yang   +6 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
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Revealing the Roles of Electrolyte Concentration on Transition Metal Dissolution and Reaction Pathway of Anion Adsorption Pseudocapacitance

Rare Metals, Volume 45, Issue 8, August 2026.
ABSTRACT Conventional lithium‐ion battery cathodes predominantly rely on reversible lithium intercalation in bulk, which inevitably induces phase transitions, transition metal migration, and voltage decay. Electrolytic anion adsorption pseudocapacitance provides a chance for bypassing these issues via a surface‐dominated reaction, especially in ...
Hongjin Ren, Xing Cheng, Yuan Wang, Jiahao Jiao, Tianwei Cui, Huiying Zhang, Yilong Niu, Yue Zhou, Xiayan Wang, Biao Li, Li An   +10 more
wiley   +1 more source

Synergistic Enhancement of Strength and Creep Resistance in Additive Manufacturing Ti‐6.5Al‐2Zr‐Mo‐V Alloy via In Situ Co‐Modification With Si and Y Elements

Rare Metals, Volume 45, Issue 8, August 2026.
ABSTRACT The demand for advanced aerospace components necessitates near‐α titanium alloys with enhanced high‐temperature performance and compatibility with additive manufacturing (AM). To address this, an in situ alloying strategy was employed to co‐modify a Ti‐6.5Al‐2Zr‐Mo‐V alloy with Si and Y during laser powder bed fusion.
Zishuo Ma, Qi An, Delong Gong, Junshi Li, Lihua Cui, Yuyang Liu, Jiayu Tian, Rui Zhang, Shuai Wang, Liqin Wang, Lujun Huang   +10 more
wiley   +1 more source

Dual‐Layer Solid Electrolyte Interphase Enables Effective Suppression of Lithium Dendrites

Rare Metals, Volume 45, Issue 8, August 2026.
ABSTRACT The heterogeneous solid electrolyte interphase (SEI) at the Li metal anode often leads to slow and uneven Li+ flux, causing severe Li dendrite growth. Herein, we combine X‐ray photoelectron spectroscopy and cryogenic transmission electron microscopy to demonstrate that a dual‐layer SEI, consisting of an inorganic inner layer and an organic ...
Huaping Wang, Aoxi Qi, Xin Du, Hailong Wang, Jianmin Ma   +4 more
wiley   +1 more source

Flexible MoNb Bimetallic MXene for High‐Performance Lithium‐Sulfur Batteries via Separator Modification

Rare Metals, Volume 45, Issue 8, August 2026.
ABSTRACT Lithium–sulfur batteries have attracted extensive interest owing to their exceptionally high theoretical energy density and environmental benignity. However, their practical performance remains severely constrained by intrinsic challenges, including the polysulfide shuttle effect and large volume expansion during cycling, which markedly ...
Long Jiang, Zhuang Wu, Qi Fan, Shengchao Wang, Wenjie Zhang, Lijing Yu, Dirong Gong, Yunlei Zhou, Kun Liang   +8 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  

Synergy Effects of Dual‐Gel‐Assisted Structural Engineering and Bimetallic Doping Regulation Realize Ultrastable High‐Rate Performance of NASICON Cathodes for Sodium‐Ion Batteries

Rare Metals, Volume 45, Issue 8, August 2026.
ABSTRACT Na‐superionic‐conductor‐type (NASICON) Na4MnV(PO4)3 (NMVP) is an appealing cathode for sodium‐ion batteries (SIBs), but its application is hindered by Jahn–Teller distortions, sluggish Na+ kinetics and poor conductivity, leading to rapid capacity fade.
Huan Liu, Xiao‐Jie Zhang, Jing‐Quan Li, Yu‐Xin Ding, Qing‐Quan Liu, Hai‐Yan Wang, Chu‐Cheng Luo, Zhi‐Hua Zhou, Xiao‐Bing Huang   +8 more
wiley   +1 more source