Results 51 to 60 of about 16,458 (194)

Surface‐Embedded Ag@Multilayer Graphene for Photothermal‐Enhanced Superhydrophobic Anti‐Icing Coatings

open access: yesRare 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

负压磁头气动力静态特性 [PDF]

open access: yes, 1993
该文用有限差分法离散Reynolds润滑方程,采用交替方向隐式格式(ADI)求解离散得到的代数方程组 ...
傅仙罗, 王凌志
core  

Dynamic Analysis of a High-rise-Building Structure during an Earthquake Considering Soil-Structure-Interaction [PDF]

open access: yes, 2017
土-结构体系有限元模拟计算分析的复杂性与计算成本,在一定程度上限制了土与结构相互作用分析在高层建筑结构设计中的应用。上部结构数值解与土解析解耦合的土-结构相互作用计算方法,为高层建筑结构提供了有效途径。利用作者提出的耦合算法,对一个钢框架-混凝土核心筒高层结构进行地震作用下的非线性动力分析,讨论了不同强度地震和不同种类地基土对结构地震反应的影响,得出了对实际工程具有指导性意义的结论。The conventional coupling analysis based on a comprehensive ...
卢佳盛, 孙宝印, 李勇
core   +1 more source

Electrospun Carbon Nanofiber‐Based Multifunctional Electrocatalysts for Zinc‐Air Batteries and Overall Water Splitting: Fabrication, Progress, and Perspective

open access: yesRare Metals, EarlyView.
ABSTRACT The development of high‐performance and stable electrocatalysts for oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER) plays a critical role in advancing clean energy technologies, including metal‐air batteries and hydrogen production through overall water splitting.
Chen‐Yu Cai   +4 more
wiley   +1 more source

地震作用下海上风电联接变压器动力模型试验

open access: yesGaoya dianqi, 2022
海上风电联接变压器作为海上风电场的主要设备,其抗震安全性关系到海上风电场的平稳运行。针对海洋平台—附属电气设备在地震作用下的动力传递过程及楼层反应谱研究,以及电气设备的动力响应特性和自身薄弱部位研究,开展了变压器1∶10模型比尺的振动台模型试验研究;模型试验与数值仿真分析结果的对比表明,海洋平台的动力特性会显著影响传递至设备底部的地震加速度的低频部分;结构的应力薄弱部位发生在储油柜下方支架处。基于弹性相似的振动台缩尺模型试验可以反映原型结构的地震动响应特性,为附属设备的抗震反应谱研究提供依据 ...
陈健云   +7 more
doaj  

Multiscale Study of a Synergistic System in Carbon‐Coated Multimetal‐Based Selenides Toward Rapid and Highly Stable Sodium Storage

open access: yesRare Metals, EarlyView.
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

多尺度热工水力分析方法研究及其在海洋核动力小堆中的应用

open access: yesHe jishu
海洋核动力小堆作为未来海洋核能应用的重要形式,其热工水力特性受到周期性流体波动和复杂运动的影响,增加了设计与安全评估的挑战。本研究旨在开发一种多尺度分析方法,通过适应性改造和多层次模拟,系统评估海洋条件下核动力小堆的热工水力行为与安全性。首先,选用STAR-CCM+作为改造系统分析、子通道和计算流体力学(Computational Fluid Dynamics,CFD)等程序的工具,对RELAP5源程序进行了修改,对海洋小堆进行简化建模,以适应海洋环境下的系统行为、组件传热、燃料棒束等关键特性;其次 ...
罗 涵禹, 宋 厚德, 刘 晓晶
doaj   +1 more source

Analysis on the Elastic Lateral Stiffness under Seismic Action for Palace Structure in the Building Standards of Song Dynasty [PDF]

open access: yes, 2015
中国古代木构架房屋具有良好的抗震性能,其中凝结了长达数千年间古代的建筑工程经验与智慧。这种“干架”结构有别于现代刚接杆系结构,其结构受力分析尚不能直接套用现代框架结构计算方法。已有的研究,通过缩尺模型试验,回归分析,拟合出类似于现代钢筋混凝土框架结构的动力学方程,尚未能揭示出符合古代设计思想及技术水平的基本原理。从古代房屋结构的设计、建造方法入手,探寻其本源的科学原理,一方面可以为古代建筑的安全性能评价找到一般性的方法,另一方面,古为今用,可以为现代工程建设带来新的启迪。 本文在深入研读《营造法式 ...
黄燕萍
core  

Bottom‐Up Strategy Toward 3D Porous MXene/MoS2 Nanosheets/Graphene Nanoarchitectures as Highly‐Efficient Hydrogen Evolution Electrocatalysts

open access: yesRare Metals, EarlyView.
ABSTRACT As a core component in the electrochemical water splitting system, the cathode catalyst is capable of boosting the kinetics of the hydrogen evolution reaction (HER), while the scarcity and expenditure of current noble metal‐based electrocatalysts seriously restrict the large‐scale commercial development of hydrogen manufacturing devices. Here,
Haiyan He   +8 more
wiley   +1 more source

[The study on the characteristics of active force of neck muscles under rapid braking conditions]. [PDF]

open access: yesSheng Wu Yi Xue Gong Cheng Xue Za Zhi, 2023
Yuan X, Li F, Lei K, Liu Q.
europepmc   +1 more source

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