Results 21 to 30 of about 2,971 (167)

Manipulating Terminal Bonds of Ti3C2Tx MXene for Highly Efficient Microwave Absorption and Photothermal Conversion

open access: yesRare Metals, Volume 45, Issue 4, April 2026.
ABSTRACT MXenes have been widely investigated as microwave absorption (MA) materials because of their unique properties. This study introduces a terminal bond manipulation strategy to enhance charge transfer and polarization in Ti3C2Tx, optimizing its MA performance.
Xiang Fang   +8 more
wiley   +1 more source

地磁感应电流对系统电压影响研究

open access: yesGaoya dianqi, 2020
针对地磁风暴发生时系统电压降低的现象,研究了地磁感应电流引起的直流偏磁对电力系统电压的影响。基于PSCAD/EMTDC平台搭建了地磁感应电流—直流偏磁的仿真模型,并用低频正弦交流电模拟地磁感应电流,记录了变压器无功功率的需求变化和系统的电压,另外研究了地磁感应电流对发电机出力的影响,同时与单极运行直流电流对电压的影响进行对比研究。结果表明,磁感应电流会导致变压器无功需求周期性增多,系统电压周期性降低,最大下降约为10%,同时地磁感应电流会导致发电机有功出力减小、无功出力增大 ...
万毅   +5 more
doaj  

基于电磁斥力—永磁保持式机构的快速真空开关分闸运动特性分析

open access: yesGaoya dianqi, 2022
针对直流电网对快速真空开关分闸要求高的问题,提出了一种基于电磁斥力—永磁保持式机构的快速真空开关。利用有限元方法对永磁保持机构保持力和电磁斥力—永磁保持式机构分闸动作过程多物理场进行仿真分析,得出了永磁体厚度和静铁心内部厚度对永磁保持机构保持力的影响,掌握了变化量对机构分闸动作过程的影响。通过对基于电磁斥力—永磁保持式机构的快速真空开关样机的分闸特性测试,与仿真结果具有高度一致性,证明其正确性,对后续此类机构的优化设计具有指导意义。
张公一   +6 more
doaj  

Study on Manipulating an Individual Cell by Micro Electromagnetic Force with Wire Arrays [PDF]

open access: yes, 2007
在硅片上制作多层交叉网格导线。当给导线通上适当电流并控制通电导线的电流方向,在相应的导线交叉网格区域会产生一个微电磁场,对磁场中的微磁粒子产生吸引力。如果把细胞和这些磁粒子结合在一起,就可以利用该微电磁场对细胞进行定位。改变不同导线的通电时序形成运动的微电磁场,进而可以控制微磁粒子的运动,也就控制了细胞的运动。仿真结果证明,采用导线阵列产生的运动微电磁场,可以对细胞进行精确定位和运动控制。By giving the appropriate current and controlling the ...
席文明, 洪小雅, 钟辉
core  

Cs2SnI6: A Perovskite‐Based Electromagnetic Wave Absorbing Material

open access: yesRare Metals, Volume 45, Issue 4, April 2026.
ABSTRACT Lead halide perovskites and carbon‐based materials are interesting, high‐performing electromagnetic wave absorbing materials. However, only a few studies have been carried out to examine in detail the electromagnetic wave absorption properties of these materials.
Fei Han   +11 more
wiley   +1 more source

Manipulating Micro Particle by Micro Electromagnetic Force by Wire Array [PDF]

open access: yes, 2008
当磁粒子包裹相应的外层物质时,可以与细胞产生选择性黏附,该特性可用于细胞分离、分选、药物运输等。在硅片上制作导线阵列,通过对相应导线阵列的通断电控制,可以操纵微磁粒子运动,也就控制了与其相联的细胞运动。细胞运动到指定位置,借助工具对细胞进行操作,研究细胞特性。 本论文研究工作的主要内容如下: 1.全面地概述了国内外细胞操纵方法的发展状况与工作原理。 2.从理论上对基于导线阵列产生的微电磁力操纵磁粒子方案进行可行性分析,并使用有限元分析软件ANSYS作导线阵列相关的电磁场分布情况模拟分析 ...
洪小雅
core  

Accelerated Ordering of Cu Atoms and Synergistic Dual Anisotropy for Enhanced High‐Frequency Soft Magnetic Properties in Fe‐Based Alloys

open access: yesRare Metals, Volume 45, Issue 4, April 2026.
ABSTRACT The inherent trade‐off between high saturation induction (Bs) and low core loss in soft magnetic materials presents a challenge in the development of high‐frequency power electronics. Here, a processing approach that combines accelerated Cu ordering with dual magnetic anisotropy control in high‐Bs Fe‐based nanostructured cores is examined ...
Xiaoying Li   +11 more
wiley   +1 more source

Performance Test of High-temperature Immersion Pump for In-reactor Purification of Integrated Fast Reactor [PDF]

open access: yes
In the integrated fast reactor project of the China Institute of Atomic Energy, in order to keep the primary circuit sodium within the reactor and prevent radioactive sodium leakage, an in-reactor cold trap is used to purify the impurities in the sodium,
LI Xu1, GENG Xiao1, YAO Zewen1, , YU Chunli1, WU Peng2, YU Genfang2
core   +1 more source

Exceptional Electromagnetic Wave Absorption in High‐Entropy Carbides Enabled by Lattice Distortion Engineering

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT The growing concern over human health issues, driven by increasingly severe electromagnetic pollution from 5G communication, has made the urgent development of high‐performance electromagnetic wave (EMW) absorbing materials. Although carbide‐based materials are promising because of their conductive and polarization losses, existing single ...
Chenqiang Duan   +9 more
wiley   +1 more source

高压直流断路器用快速机械开关电磁缓冲研究

open access: yesGaoya dianqi, 2020
基于电磁斥力机构的快速机械开关是混合式高压直流断路器的核心设备之一,其几毫秒内分闸到位的速动性对直流断路器至关重要,然而其速动性对开关的缓冲提出了更高要求。文中提出了一种适用于电磁斥力机构分闸过程的电磁缓冲方法,介绍了电磁斥力机构和电磁缓冲的基本工作原理,并建立电磁斥力机构电磁缓冲装置的有限元模型,结合其原理仿真分析了缓冲储能电容容量、初始电压和缓冲触发时间对电磁缓冲性能的影响规律。最后对舟山示范工程200 kV直流断路器用快速机械开关进行了电磁缓冲试验,验证了仿真分析的正确性 ...
曾南薰   +6 more
doaj  

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