Results 31 to 40 of about 471,339 (139)
Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT Atomically thin two‐dimensional (2D) materials have emerged as ideal candidates for realizing high‐density, fast switching, and energy‐efficient memristors. However, ultrathin memristive interlayers, particularly at the atom scale, typically suffer from poor endurance and significant variations.
Yujie Bai +12 more
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Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT Electrocatalytic CO2 reduction reaction (CO2RR) represents a pivotal pathway for the promotion of carbon neutrality and the preparation of highly valuable chemicals. To improve the product selectivity and catalytic efficiency of CO2RR, single‐atom catalysts (SACs) offering highly efficient atomic utilization rates and adjustable electronic ...
Xiaorui Liu +7 more
wiley +1 more source
World Water Policy, Volume 12, Issue 4, November 2026.ABSTRACT This article examines how renewable‐energy expansion is changing water–energy bargaining among Iran, Iraq, and Türkiye in the Tigris–Euphrates basin. Much of the existing literature on transboundary water politics focuses on territorial control, upstream–downstream power asymmetries, legal rules, and hydro‐hegemony but gives less attention to ...
Umud Shokri
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±800 kV直流输电线路正极性侧带电作业电位转移放电特性研究
Dianci bileiqi, 2020 为明确±800 kV直流输电线路带电作业电位转移放电特性,考虑强电场作用下粒子产生、运动和消散过程,构建了基于流体力学理论的电位转移流注放电模型,计算并分析了放电过程中的电场强度、流注发展速度和电流密度随时间的变化规律,以及不同转移距离下的放电电流。结果表明:在电位转移放电过程中,随着放电时间的增加,流注头部电场强度减小、流注发展速度加快、电流密度增大;电位转移棒与导线间的放电电流随着电位转移距离的减小而增大;确定了±800 kV输电线路在正极性导线侧带电作业时最佳电位转移距离为0. 45 m左右。
周晨梦 +7 more
doaj
Dianci bileiqi, 2022 笔者针对钢结构变电站直击雷防护，对雷击过程中变电站接地特性进行研究，相较于通过避雷带引下线接地的现行方案，在采用钢柱直接接地情况下，地表电位升最大值下降幅度达到26.5%。钢结构变电站的导体网络对于具有大量高频分量的雷电流具有明显的电感效应，地表电位升峰值时刻超前于雷电流约5μs。雷电流散流集中于注流点附近的4～5条引下线或者连接线，总散流占比超过90%,相比现行方案，通过钢柱接地的方案散流更加集中于注流点附近的4条连接线，距离注流点最近的连接线分流占比达到了55.19 ...
李凡 +5 more
doaj
特高压混合式MMC低全桥配比下单阀组投退过程中的均压控制 [PDF]
全球能源互联网, 2018 低全桥子模块配比的混合式模块化多电平换流器（modular multi-level converter，MMC）应用于高低阀组拓扑结构的特高压柔性直流系统时，在单阀组在线投入/退出过程中存在半桥子模块持续充/放电引起的子模块电压不均衡问题，严重影响系统安全。通过详细的理论分析，指出阀组投入/退出过程中桥臂电流不存在过零点是导致半桥子模块持续充放电问题的本质原因。为此提出了基于环流注入的单阀组投/退过程中的均压控制，在阀组投退期间控制MMC产生一定的相间环流，人为创造正负交替的桥臂电流，为半桥子模块充 ...
杨美娟 +5 more
doaj +1 more source
Dianci bileiqi湿度影响空气间隙负极性流注放电微观过程，建立棒-板空气间隙负流注放电流体模型以及试验平台。记录放电图像，对比其发展通道宽度及发光强度；测量湿度为40%、50%、60%、70%、80%条件下负极性流注放电电流及，从宏观角度对不同湿度情况下的参量进行对比分析。在数值计算中模拟湿度为0%、30%、60%、90%条件下空气间隙负极性流注放电起始、发展及击穿过程，从微观角度分析水分子对负极性流注放电特性参数的影响规律。研究发现：在棒-板电极结构下，湿度增大促进负极性流注发展。湿度每增大30 ...
王清尘 +5 more
doaj +2 more sources
International Journal of Applied Linguistics, Volume 36, Issue 4, Page 3029-3039, November 2026.ABSTRACT This study examines how foreign language teachers’ beliefs about the medium of instruction and translanguaging evolve over time by revisiting three in‐service teachers twelve years after their initial interviews. Using a qualitative longitudinal design, the study traces how translanguaging was initially framed as pedagogically deficient but ...
Danping Wang
wiley +1 more source
, 2005 该发明专利提供了一种流沙地开沟新技术,将滴灌设备改进用于流沙地开沟。首先,在流沙地上铺设已设计好的注水设备,通过滴灌设备上的毛管对流沙地进行浇水,浇灌的时间主要取决于挖沟的深度,水渗透到所需挖沟的深度后,即可停止浇灌,即可开沟,撤出注水设备用于下一个浇灌区。该技术通过多次流沙地的试验,获得了非常好的效果。解决了“沙液化”现象,在沙地埋设管线、植树造林、石油基地绿化浇灌方面均取得了明显的效果 ...
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Resource Substitution: Local Governments' Issue Attention and Policy Reinvention
Policy Studies Journal, Volume 54, Issue 4, November 2026.ABSTRACT Research on policy reinvention, where a government modifies rather than replicates policy innovations introduced by other governments, has progressed significantly, but how it is influenced by the government's issue attention has not been thoroughly examined.
Yingxin Zhang, Yixue Yao, Kaifeng Yang
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