Results 21 to 30 of about 324,350 (141)
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 7, July 2026.ABSTRACT Light‐activated gas sensors hold significant potential in environmental monitoring and smart Internet of Things (IoT) owing to their advantage in room temperature operation. Nevertheless, due to a narrow light absorption range, high photocarrier recombination rate, and weak redox activity of the sensing material, the performance enhancement of
Jinyong Hu +5 more
wiley +1 more source
Gaoya dianqi, 2020 电晕是造成车顶绝缘子老化的主要因素之一。基于高速气流试验平台,试验研究了高速气流电晕环境下硅橡胶表面的憎水性分布,通过分析高速气流对电晕放电路径和放电电流的影响,讨论了憎水性分布发生偏移的原因。研究发现:高速气流环境下电晕强度较大时,憎水性丧失最严重的部位沿气流方向发生偏移。其原因是:当电晕放电沿针尖发展至针板间隙空间时,高速气流使得电晕放电路径沿气流方向偏转。气流速度一定时,离子所受电场力随电压的增大而增大,高速气流不易将其吹离针板间隙空间 ...
张晓青 +4 more
doaj
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Engineering of the catalyst interface and modulation of transition–metal d–band play critical roles in the electrocatalytic hydrogen evolution reaction (HER). Herein, a synthetic strategy is developed to fabricate nitrogen‐doped carbon nanotubes (N–CNTs)–supported Ni3Se4–CeO2 heterojunction catalysts through a facile chemical vapor deposition (
Zhiqiang Sun +10 more
wiley +1 more source
Shiyou jixie, 2015 涡流工具排液是一种新型气井排水采气工艺。目前国内外针对井下涡流工具的室内及现场试验，仅获得部分宏观工作特性，缺乏深入的理论研究，具体排液机理不够清晰，限制了该工艺的推广应用。鉴于此，采用有限元分析方法建立涡流工具气液两相螺旋流动的数值模型，并借助CFD软件对其流动过程进行仿真。通过流动规律的预测及分析，确定出井下涡流工具排水采气机理。研究结果表明，涡流工具可形成螺旋上升的管壁液膜流和快速上升的中心气核流动；引发的高速螺旋涡流，有效降低了气液流动阻力，提升了采气速度，同时增强了气流的携液能力 ...
杨旭东, 李丽, 张军, 卫亚明
doaj
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT The urgent environmental crisis caused by polyethylene terephthalate (PET) waste necessitates efficient upcycling strategies. Herein, we establish a novel pathway to transform waste PET plastic into a high‐performance catalytic material for mediating the oxygen evolution reaction (OER). Through a one‐step hydrothermal process, waste PET serves
Xin Wang +5 more
wiley +1 more source
, 2014 本发明公开一种旋流气浮油水分离装置及气浮发生器，其中，所述旋流气浮油水分离装置，包括：一根或多根柱型旋流管以及与所述柱型旋流管相连的立式筒型气浮装置，其中：所述柱型旋流管包括旋流腔体、水平切向进液管、溢流出口管和底流出口管；所述立式筒型气浮装置包括气浮筒体、水平侧面进液管、清水出口管、气体出口管、油出口管、液体螺旋导流片和气浮发生器。本发明综合利用了高速旋流原理和气泡吸附作用，整个流程处于流动中进行。本发明适合于陆上和海上采油平台使用 ...
李锋 +7 more
core +1 more source
Biodiversity‐driven spatial conservation planning to delineate temporally stable regions
Conservation Biology, Volume 40, Issue 3, June 2026.Abstract The accelerating loss of biodiversity underscores the critical need for effective conservation strategies, particularly in the face of climate change and anthropogenic pressures. We devised a conservation planning framework that adopts a temporal stacking approach to species distribution models and landscape connectivity analyses. These models
Mattia Iannella +5 more
wiley +1 more source
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT The large‐scale application of titanium is limited by its high production costs, as well as its low utilization and recycling rates. Therefore, efficient recovery of titanium scrap offers a viable pathway to reduce its cost. Molten‐salt electrolysis offers a promising route for upcycling titanium scrap, but the conventional method, which ...
Haoyu Fang +4 more
wiley +1 more source
Sexuality, Gender &Policy, Volume 9, Issue 2, May 2026.ABSTRACT Masculinity significantly influences men's health‐seeking behaviors, yet its intersection with legal frameworks and healthcare access in Sub‐Saharan Africa remains underexplored. This mixed‐methods study investigates how gender norms and structural barriers influence healthcare experiences among 60 middle‐aged men (aged 30–60 years) in Yaoundé,
Ikekhwa Albert Ikhile +1 more
wiley +1 more source