Results 21 to 30 of about 16,808 (168)
Jianzhu Gangjiegou Jinzhan, 2010 设计钢管混凝土梁柱长圆孔变型性高强螺栓节点,上下节点板通过高强螺栓拼接连接钢管混凝土柱与钢筋混凝土梁,并引入长圆形螺栓孔以提高节点的延性变形性能。本文通过两个长圆孔变型性高强螺栓节点试件及两个传统焊接节点试件的低周反复加载试验,对不同连接方式节点在地震作用下的承载力、延性变形能力、耗能能力、滞回性能进行研究与对比。试验结果表明,螺栓节点满足节点承载能力,同时其延性性能好于传统焊接节点,节点的延性变形能力通过螺栓在长圆孔中的滑移有明显提高。与焊接节点相比较,最终两个长圆孔变型性螺栓节点发生延性破坏 ...
马人乐 +4 more
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High‐Brightness Delayed Imaging Realized by Embedding Zinc Gallate Nanocrystals Into Glass
Rare Metals, EarlyView.ABSTRACT X‐ray delayed imaging technology leverages an “irradiation‐storage‐thermally stimulated readout” mode, demonstrating unique advantages in intermittent monitoring scenarios such as high‐temperature/high‐radiation environments. This typically requires materials combining abundant carrier‐trapping energy levels with structural thermostability ...
Jun‐Xiao Wu +6 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2017 长QT间期综合征（LQTS）,是指心电图上QT间期延长,伴T波和（或）u波形态异常,临床表现为室性心律失常,晕厥和猝死的一组综合征。其病因包括先天性和获得性两个方面,获得性LQTS主要由各种药物引起。QT间期延长可能发展为室性心律失常如尖端扭转性室速（TdP）,继而发展为室颤甚至猝死。现代麻醉中不同麻醉用药可能诱发心脏复极时间延长,心电图上表现为QT间期延长 ...
吴楠, 马奔卉, 李艳辉, 麻海春
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中西医结合护理Objective To understand the extended care needs of patients with hypertensive intracerebral hemorrhage, investigate the construction methods of extended nursing service and provide reference for clinical nursing practice of hypertensive intracerebral ...
QIU Yajiao (邱亚娇) +2 more
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Rare Metals, EarlyView.ABSTRACT Harnessing solar energy for self‐heating presents an effective strategy to suppress surface ice formation. In this paper, we fabricated nano‐silver‐modified multilayer graphene sheets (Ag@MGs) that integrate photothermal and superhydrophobic properties for anti‐icing applications.
Yihan Zhang +7 more
wiley +1 more source
On the Damage Tolerance of Diffusion Bonded Titanium–Aluminum Phase Biomimetic Composites
Rare Metals, EarlyView.ABSTRACT The biomimetic design principles of natural structures involve the strategic integration of stiff and compliant phases to synergistically enhance strength and toughness. Its evolutionary refined natural armor, characterized by a specialized microarchitecture, enables superior damage tolerance.
Shuai Tong +10 more
wiley +1 more source
Guangtongxin yanjiu, 2020 针对两对被时间延迟分开的脉冲会根据相位和时延的变化影响脉冲间的传输特性,且在脉冲重叠区域会受到交叉相位调制的影响发生干涉现象的问题,文章提出了在色散渐减光纤环镜中观察脉冲对的传输特性,研究结果表明,可根据脉冲对之间的相位和时延变化,观察脉冲对的时域特性和啁啾特性,分析脉冲对在不同情况下的传输特性。
史圣达, 张巧芬
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Rare Metals, EarlyView.ABSTRACT MCrAlX coatings are widely used as bond coats in thermal barrier coating systems to protect turbine blades from high‐temperature oxidation. However, their oxidation resistance is often restricted by uncontrolled microstructures, surface roughness, and aggregation of reactive elements (REs). In this study, high‐repetition‐rate femtosecond laser
Wei Qian +7 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2008 本文对中、日、欧州及美国地震规范地震力计算的结构影响系数的构成进行了分析,认为,美国的结构影响系数中包括了材料的强屈比、超静定结构体系的超强系数以及延性系数;而欧洲的结构影响系数包含了延性系数,对于延性好的结构还允许包含结构体系的超强系数;日本仅包含延性系数;我国也是仅包含延性系数。由于日本采用允许应力设计,还有一个1.4的安全系数,因此比较起来,日本的地震力最大。从结构影响系数的构成看结构在地震作用下产生塑性变形的深度,按照美国规范设计的结构塑性变形要求最高,欧洲次之,我国再次之 ...
童根树, 赵永峰
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Zhejiang Daxue xuebao. Lixue ban, 2017 根据锚点位置固定有否，移动IP协议分为锚点固定的移动性管理协议和分布式移动性管理协议两类，后者允许移动节点在会话开始时动态地选择较近的接入路由器作为锚点，从而可以缩短切换时延并实现近似最优的路由.然而，对于给定的会话，锚点的位置是固定的，在会话持续时间内进行移动节点切换时，切换操作与锚点固定的移动性管理协议相同，存在切换时延长和路由欠优问题.为解决该问题，提出了应用双层指针的分布式移动性管理方案.使用“低层指针”在具有移动性管理功能的接入路由器间建立指向关系以缩短切换时延；使用“高层指针 ...
ZHUDeqing(朱德庆) +1 more
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