Results 21 to 30 of about 997,307 (156)
, 2014 本实用新型涉及质谱分析仪器，具体说是磁增强真空紫外光化学电离源，其具体结构包括，电离源腔体，真空紫外灯、激发电极、试剂气体进样管、磁聚焦环、推斥电极、样品气体进样管、传输电极以及差分电极。本电离源利用磁聚焦环对电子的作用，使电子沿螺旋线运动，提高了电子碰撞试剂分子的概率，增加了试剂离子的强度，实现了对真空紫外光化学电离源的电离效率的增强 ...
李海洋 +5 more
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Microstructure Engineering Toward High Cost‐Effective Nd–Fe–B Sintered Magnets: A Review
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Nd–Fe–B sintered magnets, critical for enhancing electromechanical conversion efficiency and operational stability in wind turbines and electric vehicle drives, are prized for their outstanding coercivity, high remanence, and superior maximum energy product.
Dongmin Zhang +5 more
wiley +1 more source
, 2001 磁场流化床 (MagneticallyFluidizedBed ,以下简称MFB)是将磁场引入普通流化床 ,采用磁敏性颗粒为床层介质的流固相处理系统。MFB利用磁场调节颗粒和流体的运动 ,使流化床具有更宽的操作范围和适应性。其中 ,在一定磁场和流动条件下形成的磁稳定流化床 (MagneticallyStabilizedFluidizedBed ,以下简称MSFB)更是兼有固定床的流固接触特性和流化床的压降低、传热传质效率高的优点 ,操作范围较普通流化床变宽 ...
曲红波, 吕秀菊, 欧阳藩, 丛威
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Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT The construction of core–shell grains can enhance the coercivity of Nd2Fe14B magnets. However, it is a significant challenge to elucidate the formation of these core–shell grains particularly regarding the spontaneous core–shell structure in Y‐substituted Nd2Fe14B alloys.
Sining Fan +13 more
wiley +1 more source
2021年5月22日玛多MS7.4地震震前岩石圈磁场变化特征分析
Dizhen xuebao, 2021 本文利用2019年和2020年两期的全国流动地磁矢量数据，针对玛多MS7.4地震震中附近的岩石圈磁场空间分布，分析研究了岩石圈磁场各个分量的震前变化特征。结果表明，玛多MS7.4地震发生前，震中附近的岩石圈磁场分量均发生了不同程度的变化：震中位于各分量的弱变化区域和零变线附近；震中位于各分量的高梯度带和低梯度带之间。本文证实了地震发生前会引起岩石圈磁场变化这一现象，并总结了震前地磁分量的变化特征，为今后强地震（尤其是M≥7.0地震）的震磁关系研究提供了一个震例参考。
Chao Dong +4 more
doaj +1 more source
Enhanced Magnetocaloric Effect in Tb‐Co‐Ni Magnets via Chemical Pressure
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Magnetic refrigeration materials are significantly needed in versatile modern industries, including scientific research, aerospace, and health care, due to their potential applications in gas liquefaction and storage. Herein, a significantly enhanced magnetocaloric effect with a suitable operation temperature range of 53–114 K and a giant ...
Lei Xi +11 more
wiley +1 more source
, 2014 我国有大量常规选矿方法难以利用的铁矿石资源,实现其利用可增加我国铁矿石资源可利用量,缓解铁矿石供应紧张的局面,提高铁矿石供应安全的保障程度。磁化焙烧-磁选是难选铁矿石利用的重要方法,流态化磁化焙烧是近年来研究的热点。本文综述了磁化焙烧原理、竖炉及回转窑磁化焙烧的技术现状及存在问题,介绍了流化床磁化焙烧发展历史和研发现状,着重总结了低温流态化磁化焙烧在焙烧动力学、过程强化、反应器模拟、关键技术研发及产业化示范方面的研究进展,分析了其在褐铁矿、菱铁矿 ...
李洪钟, 朱庆山
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Shuitu Baochi Xuebao, 2007 根据史料记载以及高陵渭河河漫滩沉积物共110个样品磁化率、粒度成分的测定分析,研究了近120年来,该地区沉积物在0～4.0 m深度上磁化率变化特征。结果显示,高陵渭河河漫滩磁化率随深度具有高低变化节律,整个剖面分6个阶段,第1,3,5阶段频率磁化率值高,第2,4,6阶段频率磁化率值低;沉积物磁化率与粒度成分有较好的相关性,表现为频率磁化率值低,沉积物粒度成分细,反之则反。磁化率反映了沉积时期水动力强弱变化,第1,3,5阶段对应洪水规模大的时期,指示沉积时水位高,水量大;第2,4 ...
周晓红, 赵景波
doaj +2 more sources
Shuitu Baochi Xuebao, 2019 通过田间小区磁化水滴灌试验，研究了磁化水膜下滴灌对土壤水盐分布特征、棉花生长特性及产量的影响。结果表明：磁化水灌溉可以提高土壤含水量，促进棉花根系对水分的吸收，0-100 cm土层内磁化强度为3 000 Gs时的土壤含水量最大，保水效果最好。磁化水灌溉可以有效降低土壤盐分含量，加快土壤盐分的淋洗，0-100 cm土层内各磁化水处理土壤平均含盐量表现为3 000 Gs < 4 000 Gs < 1 000 Gs < 5 000 Gs < 0 Gs，磁化淡水处理的土壤脱盐率为2.7%~28.2%，3 000
彭遥 +6 more
doaj
Efficient Spin‐Orbit Torques Enabled by Vanadium‐Induced Orbital Currents for Neuromorphic Computing
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Spin‐orbit torque (SOT) provides an efficient electrical pathway for encoding spin states and underpins emerging, ultrafast, and nonvolatile spintronic memories and logic devices. Reducing the switching current density and power consumption remains a central challenge for practical applications.
Zhonghai Yu +17 more
wiley +1 more source