Results 21 to 30 of about 7,183 (135)
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT MXenes have been widely investigated as microwave absorption (MA) materials because of their unique properties. This study introduces a terminal bond manipulation strategy to enhance charge transfer and polarization in Ti3C2Tx, optimizing its MA performance.
Xiang Fang +8 more
wiley +1 more source
, 2011 通过圆环试验,研究了4种常用减水剂和UEA膨胀剂对混凝土收缩开裂的影响。结果发现:聚羧酸系和萘系高效减水剂对净浆开裂龄期均有延缓作用,但影响规律却不尽相同。随着聚羧酸系减水剂掺量的增多,试件开裂龄期逐渐缩短,抗裂性能下降;而随着萘系减水剂掺量的增多,试件开裂龄期逐渐增长,抗裂性能提高。UEA膨胀剂在6%～12%范围的等量内掺 ...
余彬彬, 刘冬冬, 胡红梅
core
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Ceramic reinforcement is crucial for crafting ultrastrong and wear‐resistant metallic components. However, pronounced stress concentration and strain incompatibility at ceramic–metal interfaces often trigger microcrack initiation and ceramic spalling exacerbating friction under sliding conditions.
Dongting Li +8 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2023 新型位移放大型扭转阻尼器（displacement-amplified torsional damper，DATD）通过铅芯和橡胶的剪切滞回变形实现复合耗能，进一步分析了DATD的工作原理和耗能性能，并对安装有该阻尼器的框架梁柱节点的抗震性能进行了研究。采用ABAQUS软件分别建立DATD、普通现浇节点与安装有DATD的节点的有限元模型，对比DATD有限元分析结果与前期试验结果，二者滞回曲线吻合良好，从而验证该数值模拟方法的有效性。进一步地，对比普通节点与DATD节点在循环荷载作用下的耗能性能 ...
颜学渊 +4 more
doaj
Veterinary Dermatology, Volume 37, Issue 2, Page 200-210, April 2026.Background: Antimicrobial stewardship has become vital given the progressive emergence of multidrug‐resistant bacteria, and novel approaches to the treatment of bacterial infections are needed. Recently, reported synergistic effects of antibacterial drugs and bacteriophage therapy have revealed promising applications for the management of meticillin ...
Sarah Ehling +9 more
wiley +1 more source
, 2006 高强与高性能混凝土胶结料用量较多,砂率较大,粗骨料用量相对较少,而且水胶比较低,常掺有其它掺合料,因此若处理不妥易出现混凝土早期开裂现象.本文在圆环法试验的基础上通过平板法试验,研究分析不同水胶比和不同粉煤灰掺量对高强与高性能混凝土开裂性的影响.研究结果表明,高强与高性能混凝土的裂缝主要发生在早期,因此在早期就应该及时采取控制裂缝的措施;在低水胶比的情况下,水胶比对高强与高性能混凝土抗裂性能的影响较为明显,水胶比越小,开裂越严重;掺入粉煤灰对混凝土抗裂有所改善,但是其掺量对抗裂的影响并不是呈定向规律 ...
郑建岚, 郑翥鹏
core
Novel Non‐Equimolar High‐Entropy Zirconates With Superior Thermophysical Properties
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Rare‐earth zirconates (RE2Zr2O7) are promising candidates for topcoat materials in thermal barrier coatings (TBCs). However, their practical application in TBCs is limited by poor fracture toughness and low thermal expansion coefficient (TEC).
Taoyi Lu +7 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2023 提出一种新型模块装配式灌浆钢梁柱节点，其上、下模块的梁通过螺栓连接，而方钢管柱通过内套承插钢管连接，且钢管柱内壁与承插管外壁设置抗剪键并灌浆。为了研究所提出节点的滞回性能、破坏模式、节点承载力以及节点的转动能力，对2个节点试件进行了低周往复加载试验，结果表明：两试件均发生钢管柱局部屈曲，并最终在梁柱焊接处钢管柱发生开裂；该新型节点的承载力、延性以及耗能能力与比对组未灌浆承插节点基本相同，同时灌浆节点试件的塑性转角满足美国抗震规范的限值要求，表明灌浆节点具有良好的抗震性能。
李涛, 刘明亮, 张彤, 王小平
doaj
The influence of Constituent materials on the shrinkage cracking of Ready-Mixed Concrete and Crack-Resistance optimal design of Concrete Mix Ratio [PDF]
, 2011 随着我国大规模基础设施建设对混凝土的巨大需求，商品混凝土以其专业化生产、精确的质量控制、文明和快速施工等优点在我国土木工程中得到广泛应用。由于商品混凝土的大流动性、胶凝材料用量多、砂率大等特点，混凝土开裂现象有增无减。在混凝土技术可持续发展与混凝土结构耐久性设计的迫切要求下，混凝土早期开裂的防治和抑制研究显的尤为重要。本文针对厦门市商品混凝土的发展现状，对商品混凝土的组成材料和用量进行甄选，优化设计混凝土的配合比，以实现裂缝控制目标。 本文首先概述了商品混凝土的收缩变形与开裂问题 ...
余彬彬
core
SWEET1‐mediated glucose transport is crucial for energy availability in Arabidopsis
New Phytologist, Volume 249, Issue 4, Page 1816-1830, February 2026.Summary The stress‐responsive hormone abscisic acid (ABA) is known for its inhibitory effects on various physiological processes, including seed germination, often resulting in energy deprivation. Interestingly, ABA‐induced germination inhibition can be alleviated by exogenous glucose (Glc), mimicking a functional interplay between ABA and sugar ...
Xueyi Xue +3 more
wiley +1 more source