Results 11 to 20 of about 386,854 (141)
Inverse Thermal Softening Behavior in a High‐Entropy Alloy Under Various Strain Rates
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Although face‐centered cubic high‐entropy alloys (HEAs) have received extensive attention and in‐depth research, most existing studies focus on single temperature or strain rate conditions, lacking systematic investigations into deformation mechanisms under extreme thermomechanical coupling environments.
Zhi Wang +6 more
wiley +1 more source
, 2001 流态是描述气液两相流动体系的基本要素之一。正确判断流态对于气液两相流的研究和工程应用都有重要意义，因而它一直是两相流研究领域的重要方面。本文在对国内外研究现状进行总结的基础上，进行了以下两方面的研究：（1）基于管道压力和管段压力降动态信号处理的气液两相管流流态在线识别的方法研究；（2）非牛顿流体气液两相管流的流态特性。主要的工作以及结果如下：1）对气液两相流流态的定义、转换准则、在线识别方法进行了比较详尽的综述和评议。2）研究了利用管段压降动态信号的功率谱密度分布（PSD）提取流态特征的方法 ...
劳力云
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Gaoya dianqi, 2016 湍流模型参数的合理设置是气流场仿真中的要素之一。对于电流零区湍流模型的选择及湍流参数的设置,研究者持有不同的观点。文中针对零区气流场对标准k-epsilon湍流模型参数敏感度大小的问题,基于磁流体动力学原理,以252 k V压气式结构燃弧阶段的动态仿真为基础,计算了电流过零阶段湍流模型参数C1e对气流场的影响偏差百分比。通过特定监测点处气压与温度的对比,分析讨论了引起敏感度数值差异较大的原因。研究表明,湍流模型参数C1e的改变对喷口区域内气体压力的影响较小,对于气体温度的影响相对较大 ...
吴杰 +6 more
doaj
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Photocatalytic hydrogen peroxide (H2O2) production from water and oxygen driven by solar energy represents a highly promising green and sustainable strategy. Herein, lignin‐derived carbon quantum dots (LCDs) were strategically introduced at the heterojunction between a Bi‐based metal organic framework (Bi‐MOF) and ZnIn2S4 (ZIS).
Wanpeng Sun +8 more
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2015 利用常规和非常规观测资料，对浙江省台州地区2014年3月19日冰雹等强对流天气过程进行了分析.研究发现：(1)冬末春初，前倾槽、地面弱冷空气东移南下的环流形势有利于强对流天气的形成；(2)台州地区高温高湿、不稳定层结、地形抬升及较强的垂直风切变条件，为局地强对流天气的出现提供了基础；(3)受到地形强迫抬升的影响，对流云团由西向东进入台州后加强发展，对流单体移向前方近地层的偏东气流，与对流单体后部的下沉气流相结合，使得对流单体得以维持和发展；(4)雷达回波图上，多个时刻出现了高悬的强回波 ...
GANJingjing(甘晶晶) +2 more
doaj +1 more source
Green Hydrogen in Brazilian Media: Dominant Narratives and Missing Dimensions of the Energy Trilemma
Politics &Policy, Volume 54, Issue 5, October 2026.ABSTRACT Media discourses help shape the visibility and legitimacy of energy transition pathways in the public sphere. This study examines how Brazilian mainstream newspapers framed green hydrogen and assesses the alignment of these narratives with the energy trilemma: energy security, environmental sustainability, and social accessibility. We analyzed
Flávia Mendes de Almeida Collaço +3 more
wiley +1 more source
Shiyou jixie, 2015 针对目前气井涡流携液机理和效率认识不清，现场工程设计与分析主要依据经验，影响应用效果等问题，运用AutoCAD和Fluent流体模拟软件，建立了涡流工具气液两相流场模型，分析了气液混合物通过涡流工具前后的流动轨迹、流型变化特征和携液效率变化规律。研究结果表明，涡流工具将气液两相雾流转换为螺旋环流，液体以液膜形式沿管壁螺旋向上流动，而气体在油管中心以更高的速度流动。这种流态能够降低流动过程中的压力损失24.3%，提高流体速度13.5%，减小持液率3.3%，减弱气液两相之间的滑脱，提高气体携液能力 ...
doaj
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Electrochemical carbon dioxide reduction reaction (CO2RR) powered by renewable electricity offers a sustainable route for producing value‐added carbonaceous chemicals. Herein, a three‐membrane electrolyzer was employed to directly co‐generate carbon monoxide (CO), chlorine (Cl2), and potassium carbonate (K2CO3) from the electrolysis of CO2 and
Shuai Wu +10 more
wiley +1 more source
Gongye shui chuli, 2007 对采用聚丙烯中空纤维膜组件运用膜气提法去除水体中甲基叔丁基醚(MTBE)进行了初步研究,着重考察了温度、气体流速、液体流速及气体压力等因素对去除效果的影响。结果表明,膜气提法是一种比较有效地去除水中MTBE的技术,去除率98%左右;温度、气体流速和液体流速对去除率有显著影响:去除率随水温的升高而增大,随气体流速和液体流速的增加而升高;而气体压力对去除率的影响则不明显。
姜斌, 许丽娟, 纪志永
doaj +2 more sources