Results 31 to 40 of about 1,206,397 (158)
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
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
提出一种新型的预应力混凝土叠合板——波纹钢腹板预应力混凝土叠合板(PCCW板),通过对7块跨度为2700mm的PCCW板进行单向均布加载试验,研究了PCCW板的抗弯刚度、抗弯承载力、抗裂性能、钢与混凝土协同工作的整体受力性能。试验结果表明:PCCW板的抗弯承载力和抗弯刚度均较高,完全能满足施工阶段的要求。通过参数比较分析,发现波纹钢腹板厚度、上部混凝土翼缘高度、波纹腹板开孔均对PCCW板的抗弯性能有影响。
侯和涛 +5 more
doaj
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
Novel Non‐Equimolar High‐Entropy Zirconates With Superior Thermophysical Properties
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
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 ...
刘冬冬, 胡红梅, 余彬彬
core
目的将环介导等温扩增(LAMP)技术与抗菌肽裂解法相结合,实现人尿样沙眼衣原体的快速且灵敏的检测。方法选取盘锦市中心医院2019年12月至2020年06月接受尿液衣原体检测的患者100例,分别使用PCR荧光法及LAMP法检测,并进行特异度、灵敏度及临床验证实验。结果与未接受抗菌肽裂解处理的尿液样本相比,裂解后样本反应效率大幅提高,10循环左右即可达到平台期;特异性实验中所用6种常见病原菌(大肠埃希菌、屎肠球菌、表皮葡萄球菌、肺炎克雷伯菌、金黄色葡萄球菌、副溶血链球菌 ...
苏真娟, 王梦涛
doaj
SWEET1‐mediated glucose transport is crucial for energy availability in Arabidopsis
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
ABSTRACT Enhancing the strength of 7000 series high‐strength Al alloys remains a critical challenge to meet the demands of increasingly demanding service environments. In this study, a novel approach is proposed for developing high‐performance Al alloys through a combination of powder mechanical alloying, powder press‐forming, rolling deformation, and ...
Peng‐Fei Ji +4 more
wiley +1 more source
ABSTRACT Tungsten is inherently brittle and particularly prone to thermal stress concentration and crack formation during additive manufacturing processes such as laser cladding, which severely limits its engineering applications as a coating material. To address this issue, this study proposes an in situ toughening strategy involving the introduction ...
Guo‐Xing Chen +12 more
wiley +1 more source

