Results 61 to 70 of about 20,428 (239)
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT High‐entropy alloys (HEAs) have attracted considerable interest from researchers owing to their tunable chemical compositions, exceptional structural stability, and promising catalytic properties. However, their large‐scale application is often hindered by complex manufacturing techniques and poor durability.
Sheng Guo +9 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2023 为提高整体式桥的梁台结合部抗裂性能与施工便利性，提出一种新型整体式桥台与组合梁结合部构造。采用ABAQUS通用分析软件，考虑钢混界面摩擦滑移效应，建立整体式桥台与组合梁结合部的三维有限元模型。通过仿真计算得到整体式桥台与组合梁结合部的破坏形态与荷载-挠度曲线，分析其极限承载力与传力机理，并与模型试验结果进行对照验证。进一步通过参数化计算分析，得到混凝土强度、钢材强度、钢板厚度与腹板形式对梁台结合部承载性能的影响。研究结果可为整体式桥梁及类似结构的研究提供参考。
范慧敏 +4 more
doaj
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT The development of sodium‐ion batteries (SIBs) is limited by slow charge transfer kinetics and large material volume changes caused by the large radius of Na+. Leveraging the excellent physicochemical properties and unique heterostructures of metal selenides, ultrafine hetero‐CuFeSe2‐CoSe2 nanoparticles are in situ wrapped by ...
Ying Zhu +5 more
wiley +1 more source
A Study on Risk Management of Currency Composition of China’s Foreign Exchange Reserves [PDF]
, 2011 新世纪以来，我国经济和外汇储备规模持续快速增长。截至2010年末，我国外汇储备余额为28473亿美元，远超日本、英国等传统的外汇储备主要持有国，外汇储备总规模居世界第一。然而，持续高速增长的外汇储备和长期以来我国的货币组合配置也带来了巨大的管理成本和风险。当前，美国次贷危机引发的全球经济危机阴霾尚未散去，欧洲主权债务危机继续蔓延，美元及其他主要国际储备货币存在着长期贬值预期。在此大环境下，对外汇储备的货币组合即币种结构的影响因素进行合理分析，对存在的风险进行合理有效的识别及管理 ...
宋君
core
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Multimodal luminescent materials are crucial for advanced information encryption, real‐time dosimetry, and high‐resolution bioimaging, yet integrating orthogonal stimulus‐responsiveness into a single‐component system is challenging. Herein, we report a Pr3+‐doped Ca3Ga2Ge3O12 (CGGO: Pr3+) garnet phosphor that exhibits orthogonally addressable ...
Qi Chen +10 more
wiley +1 more source
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Two‐dimensional (2D) nonlayered niobium nitrides have attracted considerable interest for electrochemical energy storage. However, the synthesis of these materials is hampered by their nonlayered crystal structures, which are characterized by strong three‐dimensional chemical bonding.
Rui Huo +7 more
wiley +1 more source
Gaoya dianqi, 2018 为满足变压器式可控电抗器（controllable reactor of transformer type,CRT）"高阻抗、弱耦合"的设计要求,结合磁集成技术,提出一种结构更为简单、对制作工艺要求更低的CRT实用化本体结构。该结构通过在工作绕组与控制绕组间设置漏磁铁心,使变压器与限流电抗集成在一起构成一个具有"高阻抗"的基本独立单元。将这样多个基本独立单元组合并联构成CRT本体,可实现"弱耦合"。根据对基本独立单元的磁路分析,推导出工作绕组电流的一般表达式以及建立其等效电路,并以实验室样机制作为对象 ...
付鹏宇, 田铭兴, 张宁
doaj
Jianzhu Gangjiegou Jinzhan, 2023 从材料力学原理出发，基于剪力互等定理和轴压构件的二阶弯曲效应，结合十字形双组合角钢构件受压时的实际破坏形态，推导了十字形双组合角钢构件填板连接的理论计算方法，给出了填板连接的一般设计方法；并结合试验结果论证了传统算法的局限性，确定了不同填板布置形式时填板处十字形截面的剪力不均匀分布系数；理论计算方法考虑了十字形双组合角钢构件不同失稳模式的影响，与试验结果相比，其安全裕度在10%以上，较传统算法具有较大的优越性，能够满足输电塔结构设计的一般要求；最后通过精细化数值分析验证了计算方法的准确性和可靠性 ...
何松洋 +5 more
doaj
Studies on Dynamic Substructure Method and Sensitivity Theory and Their Applications in Structural Analysis and Optimization [PDF]
, 2011 随着科学技术的发展和工艺水平的提高，机械产品开始向高速、高精度、高加工性能及自动化方向发展。为解决大型复杂机械产品结构的强度、精度、可靠性等一系列基本问题，结构的分析和优化成为学术和工程界研究的重要课题。一般说来，大型复杂结构的分析优化均会涉及计算可行性和结构设计变量对结构性能影响等方面的问题。 本文包含两方面的内容：1、研究动态子结构方法，并将其应用于装载机车架-油箱子结构当中，通过整体和局部分析在计算精度，计算时间上的比较，说明动态子结构法在作为整体的局部结构分析中的应用；2 ...
郑润昊
core
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Efficient and durable bifunctional electrocatalysts are vital for scalable water electrolysis. Here, we realize cobalt‐vacancy (Covac) engineering in CoFeP supported on N,P‐codoped carbon nanocages (Co1‐vacFeP/NPC) through a simple route comprising a CoFe Prussian blue analog precursor, phosphidation–pyrolysis, tannic‐acid etching, and a ...
Yuan‐Liang Yuan +6 more
wiley +1 more source