Results 31 to 40 of about 107,299 (154)
Multimodal Deep Learning‐Assisted Microstructural Evaluation System for Sintered NdFeB Magnets
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT The performance of sintered NdFeB magnets, especially coercivity, is critically determined by their complex microstructure. However, a quantitative microstructural evaluation system (MES) is much needed but has long been missing in the community.
Zihao Wang +8 more
wiley +1 more source
Shuitu Baochi Xuebao, 2020 侵蚀泥沙颗粒对深入理解和模拟泥沙及与之有关的化学污染物质输移至关重要。通过对国内外相关研究归纳整理、总结经验，重点围绕土壤水蚀的2个主要过程（细沟间和细沟侵蚀），对侵蚀泥沙颗粒输移形式、各级未分散颗粒的机械组成、不同粒径颗粒的富集规律和分选特征以及影响因素等进行综述与评价。纵观国内外的研究进展，侵蚀泥沙颗粒流失规律的研究已经较为全面和深入，取得了-些共识性成果：（1）未分散状态下的泥沙颗粒粒径分布更适合用来描述、模拟泥沙的输移行为和与之相关的营养污染物质迁移；（2 ...
郝燕芳, 佟帆
doaj
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
Gongye shui chuli采用颗粒粒径选择压与沉降速率选择压相结合的策略，在120 d内成功培养出白色除磷颗粒污泥，颗粒成熟后在反应器内因粒径分化出现分层，按粒径筛分为R1（<2 mm）、R2（2~4 mm）、R3（4~7 mm）、R4（>7 mm）共4组，考察了白色颗粒污泥的除污效能和理化性质。除污效能实验结果表明，在4组粒径范围内，白色颗粒污泥对COD去除效果均较好；4~7 mm的颗粒污泥对TP的去除率最优，达到99.94%；TN的去除率随着粒径的增大而增大，>7 mm的颗粒污泥对TN的去除率最优，达到82.
徐明煌 +3 more
doaj +2 more sources
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Bimodal grain structure (BGS) demonstrates significant potential in synergistically optimizing the strength and plasticity of magnesium alloys. Acquiring the desired BGS consequently became a critical challenge. This study took the Mg‐9Gd‐1Zn‐0.5Zr (wt%, VZ91K) alloy as its subject. From the perspective of BGS formation mechanisms, it suggests
Shuai Yuan +5 more
wiley +1 more source
Shuitu Baochi Xuebao, 2019 为了解驾校不同微环境地表灰尘中Hg的污染情况，使用测汞仪（Hydra II C）测定了芜湖市区26个驾校全粒径和细粒径灰尘样品中Hg的含量，并进行了统计分析。结果表明：芜湖市区驾校地表全粒径和细粒径灰尘中Hg的平均含量分别为49.36，59.97 ng/g，均低于芜湖市土壤背景值，且全粒径与细粒径灰尘中Hg含量存在极显著性差异（P S弯 > 侧方位停车 > 直角转弯 > 坡道定点，细粒径灰尘则表现出：倒车入库 > S弯 > 侧方位停车 > 坡道定点 > 直角转弯，两者呈现出相似的规律，其中倒车入库 ...
王月 +6 more
doaj
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT The commercialization of lithium‐sulfur batteries (LSBs) faces dual challenges of sluggish sulfur redox kinetics and lithium polysulfides (LiPSs) shuttling. Herein, we demonstrate a synergistic strategy combining multidimensional structural confinement with d‐band center modulation to simultaneously suppress LiPSs diffusion and catalyze ...
Shibo Rong +8 more
wiley +1 more source
, 2016 本发明提供了一种超小粒径锡及锡基合金纳米颗粒的制备方法及其应用。具体地，本发明提供了锡-锡基合金-碳纳米管复合材料，其特征在于，包括碳纳米管，以及与所述的碳纳米管复合的锡-锡基合金纳米颗粒，其中，所述的纳米颗粒的粒径为0.1-10nm。所述锡及锡基合金纳米颗粒与碳纳米管的复合材料可用于制备电池负极活性材料，且其应用于锂离子电池时，表现出高容量 ...
韩伟强, 辛凤霞
core
Gaoya dianqi, 2016 为研究动车组支柱绝缘子伞裙不同部位积污特性,将动车组支柱绝缘子伞裙分为迎风面、背风面和侧风面,建立了积污特性的流场计算模型,以质量沉积率为表征积污特性的参数,分析了不同部位质量沉积率与污秽颗粒粒径、气流速度之间的关系,比较了不同部位质量沉积率的差异性。仿真结果表明:迎风面和侧风面质量沉积率随污秽颗粒粒径的增大而增大,背风面质量沉积率随污秽颗粒粒径的增大而减小;不同部位质量沉积率与气流速度的关系受污秽颗粒粒径的影响,当污秽颗粒的粒径大于10μm时,随着气流速度增大,迎风面和侧风面质量沉积率增大 ...
律方成 +5 more
doaj
冻融循环次数和土壤含水率对油松林土壤团聚体及有效态微量元素的影响
Shuitu Baochi Xuebao, 2020 以王茂沟流域典型人工油松林土壤为对象，研究了不同冻融循环次数（0，3，9次）和不同土壤含水率（40%FC，60%FC，80%FC）条件下土壤团聚体组成和团聚体中4种有效态微量元素（Cu、Fe、Mn、Zn）的演变特征。结果表明 ...
姚珂涵, 肖列, 李鹏, 高扬
doaj