Results 41 to 50 of about 9,073 (119)

虚拟电厂供需侧双层协调自适应鲁棒优化调度 [PDF]

open access: yes全球能源互联网
源荷预测是虚拟电厂(virtual power plant,VPP)制定未来调度计划的重要依据。提出一种基于多频组合短期源荷预测的VPP发电侧和用户侧协同优化调度方法。首先对时间序列的负荷数据进行集合经验模态分解(ensemble empirical mode decomposition,EEMD),并将其重构为高低2种频率,使用图卷积神经网络(graph convolution network,GCN)和长短期记忆网络(long short-term memory,LSTM)相结合的GCN ...
吕小红*, 刘维, 刘克恒, 蒋婧
doaj   +1 more source

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

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
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

退役磷酸铁锂电池容量一致性及衰减特征研究 [PDF]

open access: yes全球能源互联网, 2018
分别以出租车及换电公交大巴退役磷酸铁锂电池模块为研究对象,测试并分析了其放电容量分布特性。随机抽取若干上述公交大巴退役电池模块拆解成单体电池,从中再随机抽样选取12支进行2000次容量循环测试,选取#1~#4电池的容量循环实验结果,研究其容量衰减特性及衰减率,并对退役电池衰减突变现象进行了分析。研究发现,退役电池剩余容量及容量衰减特性满足梯次利用要求,但是容量不一致性给电池重组及管理带来了挑战,同时个别电池容量存在衰减突变现象,影响梯次利用储能系统可靠运行。
赵光金, 邱武斌
doaj   +1 more source

Synergistic Effect of MOF@CMC‐Derived Magnetic Nanocomposites: Enhancing Electromagnetic Interference Shielding and Joule Heating

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT Emerging as attractive alternatives for sustainable, low‐cost, and high‐performance electromagnetic interference (EMI) shielding, biomass‐derived carbon is nonetheless constrained by a limited repertoire of shielding mechanisms. Herein, a straightforward method was employed to synthesize self‐supporting Co nanoparticles embedded in porous N ...
Yingjie Xu   +6 more
wiley   +1 more source

国网辖区特高压直流线路防雷运行现状分析 [PDF]

open access: yes全球能源互联网, 2018
据统计,国网所辖特高压直流线路雷击故障概率较特高压交流线路高,有必要对国网特高压直流线路防雷运行现状进行分析。国网三大特高压直流线路(复奉线、锦苏线、宾金线,简称“三大直流”)的雷电参数及雷击重启情况表明宾金线的雷击重启率较高。在提出若干影响特高压直流线路雷击重启的因素基础上,分别研究了各因素对雷击重启的影响程度,并基于各因素间的相关性分析,分别得到了单因素和多重因素组合对雷击重启的影响程度。通过电气几何模型,分析杆塔耐雷性能,得出了宾金线雷击重启率高的原因为导线和横担间的空气间隙距离较短 ...
王剑   +6 more
doaj   +1 more source

Solutionism for the Many, Regulation for the Few: How Online Media Bundles the Policies on the Future of Work in Indonesia

open access: yesReview of Policy Research, Volume 43, Issue 2, March 2026.
ABSTRACT The future of work (FoW), that is, how new technologies from automation to artificial intelligence affect the workplace, has become such a salient topic that its framing matters for the evolution of important policy areas from social protection to market and labor regulation.
Achim Kemmerling, Viddy Ranawijaya
wiley   +1 more source

风电场参与电网一次调频最优方案选择与风储协调控制策略研究 [PDF]

open access: yes全球能源互联网, 2019
研究了大型风电场联合集中式储能系统参与电网一次调频的可行性与经济性,并提出一种风储联合调频控制策略。统计分析了正常运行与发生功率缺额事件下实际电网的频率特性,仿真验证了新能源机组参与电网一次调频的必要性;类比火电机组一次调频原理,提出了新能源机组参与一次调频的基本条件;分析了风电机组基于转子惯量、预留备用和配置储能3种调频方案的技术经济性,指出风电场装配集中式储能以承担一次调频是更为经济有效的调频方案。旨在充分利用风机转子惯量以减少配置储能容量,提出一种风储协调的调频控制策略,有效减少储能容量。
刘辉   +4 more
doaj   +1 more source

Mesoporous Hollow Carbon Spheres/Nanofibers Anchored With Conductive Bimetallic for Efficient Microwave Absorption

open access: yesRare Metals, Volume 45, Issue 2, February 2026.
ABSTRACT To break electromagnetic wave absorption (EMA) tech's single‐attenuation bottleneck, enhancing multi‐wave absorption synergy in composites is key for microstructure design. This study uses mesoporous hollow carbon spheres to make metal nanospheres with cobalt, iron, and nickel nanoparticles, then encapsulates them via electrospinning into a ...
Wei‐Lian Zhang   +10 more
wiley   +1 more source

基于改进高斯混合模型的变电站负荷聚类算法 [PDF]

open access: yes全球能源互联网
针对传统高斯混合模型(Gaussian mixture model,GMM)聚类算法中计算复杂、收敛速度慢和人为确定聚类数目时存在盲目性和主观性等不足,提出了一种基于改进GMM的变电站负荷聚类算法。以传统GMM聚类算法为基础,采用k均值(k-means)算法确定初始聚类中心。减少了GMM聚类算法迭代步骤,提高了输出结果的稳定性。输出不同聚类数下聚类结果的Davies-Bouldin(DB)指标、Calinski-Harabasz(CH)指标和轮廓系数(silhouette coefficient,SC),
余浩   +5 more
doaj   +1 more source

面向元宇宙的数字公民身份认证方案

open access: yes智能科学与技术学报, 2022
元宇宙作为虚实融生的三元世界,为人们提供了海量多样化的网络服务,但由于缺乏现实世界的面对面交流且无法打破地理与时间的限制,现有方案无法在高效认证数字公民的同时实现隐私保护与监管。基于此,提出一种面向元宇宙的数字公民身份认证方案。依据身份时效性设计分层认证方案,基于 Paillier 同态加密和保持结构性签名等算法实现去中心化标识符与可验证凭证的双重不可链接,并借助代码嵌入技术保障公民的被遗忘权,保护公民隐私;而且在认证过程中嵌入监管因子,以供日后追责。最后,安全性分析证明了所提方案满足不可链接性 ...
吕秋云   +4 more
doaj   +1 more source

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