Results 31 to 40 of about 13,268 (124)
Dianci bileiqi, 2013 电涌保护器（SPD）的能量配合是低压配电系统防雷工程中的重要课题。基于理论计算和ATP-EMTP仿真,研究一端口限压型SPD在短波（8/20μs）和长波（10/350μs）下的能量配合问题,着重分析SPD级间距离和参数配合对这种配合的影响。提出金属氧化物压敏电阻（MOV）伏安特性研究的一种假设,给出了级间电缆的长度与后级SPD分流比的关系曲线。结果表明:短波情况下,10 m的级间电缆可将后级SPD电流限制在总电流的20%以内;长波情况下,80 m的级间电缆才能达到相近的效果。
姜辉 +5 more
doaj
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Photocatalytic molecular oxygen (O2) activation provides a sustainable approach to produce singlet oxygen (1O2) for organic contaminants detoxification. However, the charge carriers‐involved pathway usually suffers from unsatisfactory 1O2 production efficiency owing to energy loss caused by photogenerated hole‐mediated superoxide species (•O2−
Yan‐Biao Shi +8 more
wiley +1 more source
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT With the rapid development of the energy storage industry, aqueous zinc‐ion batteries (AZIBs) have attracted considerable attention in the field of energy storage because of their inherent advantages, thereby emerging as a promising research direction with significant potential.
Lingjiao Fu +8 more
wiley +1 more source
Gaoya dianqi, 2014 适应智能变电站一次设备智能化的迅速发展,研制了新一代整合型变压器智能组件,根据特性功能划分,把测量IED、风冷控制IED、有载分接开关控制IED、非电量保护IED整合为变压器综合监测控制智能组件,结合变压器的就地运行情况完成智能非电量保护、风冷控制、有载分接开关控制,实现变压器智能控制、运行状态监视和综合判断等功能。经过测试和试验,将在北京某新建智能变电站配合变压器本体运行。
包伟 +4 more
doaj
[[abstract]]主要針對物流中心作業流程中的監控與揀貨二部份進行探討。本研究將以現有與未來預期的RFID通訊技術為基礎，利用相關文獻的蒐集，獲得相關資料與數據。再利用數學規劃方法與系統最佳化概念，在相關區位理論限制下，如最大讀取範圍等，以最小佈設成本為目標，發展RFID佈設於物流中心的數學模式。本模式預期為區位設施服務範圍問題（LSCP）與P中位問題（P-median problem），為有效求解實務上所面臨大規模問題，本研究擬應用容易執行且兼具解題速度與精度的巨集式啟發解法 ...
[[corresponding]]邱顯明, 邱顯明
core
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT This study elucidates the oxidation mechanisms governing Y/Hf‐doped AlCoCrFeNiTi high‐entropy alloys (HEAs) and reveals the pivotal role of fabrication processes in dictating high‐temperature oxidation behavior. We demonstrate that casting and spark plasma sintering (SPS) promote Y/Hf segregation, resulting in heterogeneous oxide formation and
Huaqing Yi +5 more
wiley +1 more source
Dianci bileiqi, 2014 通过在实验室内搭建多级SPD以及SPD与被保护设备的线路模型,研究了不同的配置环境（如改变上下两级SPD之间的电缆长度、改变入侵的电涌波形和改变被保护设备的特性等）对于多级SPD之间以及SPD与保护设备之间能量配合和电压保护水平配合的效果。实验结果表明:SPD之间的电缆长度会影响下级SPD的能量分配和残压大小;侵入的电涌波形会改变SPD残压的大小以及引起线路上电涌波形的畸变;被保护设备的阻抗会改变下级SPD和被保护设备之间的能量分配。
赵洋, 行鸿彦, 刘非凡
doaj
Gaoya dianqi, 2023 为提高配网实验室质量监督能力，提出了基于模糊层次法的配电变压器抽检实验室能效评估方法。首先，基于层次分析法和灰色理论，提出以试验设备、软件系统、试验流程以及安全管理为准则层的指标评价体系；接着，计算某配电变压器实验室能效的综合评价值；最后，找出该实验室系统的薄弱环节。研究表明：建立的能效评估体系，CR值均小于0.1，证明文中指标体系的设计是合理的；该实验室综合评价结果I级，物流信息评分值最低，说明该系统的物流过程有待改善。文中指标体系的建立，对物资抽检质量的提升具有促进作用。
丁伟, 乐文静, 罗拥军, 钱辉敏
doaj
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Nanocomposite permanent magnets with reduced rare‐earth content represent a promising class of materials for next‐generation high‐performance applications. However, asynchronous precipitation of soft and hard magnetic phases often results in grain size mismatch and limited coercivity.
Xiaowei Zhang +6 more
wiley +1 more source
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT The development of high‐performance electromagnetic protection materials integrating broadband absorption and effective shielding capabilities is hindered by challenges in simultaneously optimizing multiple electromagnetic properties through conventional material designs.
Changlong Du +9 more
wiley +1 more source