Results 21 to 30 of about 1,407,272 (151)
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Infected bone defects represent a dual therapeutic challenge demanding concurrent infection inhibition and osteogenesis promotion. Systemic antibiotic administration is taken as a classical treatment protocol but often yields inadequate local antibiotic concentrations and delayed bone repair.
Xucai Wang +8 more
wiley +1 more source
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
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Laser powder bed fusion (LPBF) of Inconel 718 alloy inevitably introduces pronounced microstructural anisotropy, typified by columnar grains and robust crystallographic texture. This results in direction‐dependent fatigue behavior, raising critical reliability concerns for high‐stakes aerospace applications.
Zhifang Shi +9 more
wiley +1 more source
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT High‐strength aluminum (Al) alloys are usually unprintable by laser powder bed fusion (LPBF) due to the severe hot cracking along the columnar grains. Doping elements scandium (Sc) and/or zirconium (Zr) is an effective way to eliminate hot cracks by refining the grain size to nearly nanoscale levels.
Zehuan Zhang +15 more
wiley +1 more source
Shuitu Baochi Xuebao, 2004 土壤侵蚀沉积是地球物质循环的重要环节，但人为因素使之加剧并引起许多生态环境问题。以四川紫色丘陵区小流域为例，根据地形部位及土壤性状划分出侵蚀沉积纵横断面，分析其侵蚀沉积特征，并采集土壤样品研究其颗粒组成和分形维数特征。结果表明：侵蚀沉积纵横断面不同地形部位侵蚀沉积特征明显不同，可分冲刷剥蚀、搬运扩散和沉积掩埋3种类型并连为侵蚀沉积链；侵蚀沉积纵横断面的划分对土壤侵蚀与沉积的认识更全面，整体性更强。研究区颗粒组成特别是粘粒含量明显地体现出侵蚀沉积的差异，分形维数综合体现出明显地随高度降低粗粒物质减少 ...
张保华 何毓蓉 徐佩 廖超林 朱波
doaj +2 more sources
Shuitu Baochi Xuebao, 2016 区域表土粒度分布特征可反映该区环境特征，研究风水复合侵蚀区小流域内部表土粒度分布特征，可为探究风水两相侵蚀作用机理提供一定的理论依据。通过野外表土空间采样和室内测定，对地处风蚀复合侵蚀区的东柳沟流域的表土粒度分布特征及其可风蚀性进行研究，结果表明：东柳沟流域各种土地利用类型的表土粒径主要为细砂粒 (50～250 μm)，体积分数为56.59%～86.65%，属于风沙土。流域不同土地利用类型表土粒度性质存在显著差异，草地、农地、灌木地的平均粒径(Mz)分别为77.60，81.66，87.85 μm ...
张 辉 +6 more
doaj
Zhejiang Daxue xuebao. Lixue banAiming at the problem of insufficient local feature extraction of general point cloud classification methods in fine-grained classification tasks, we propose a point cloud-oriented 3D model classification framework, HFE-Net.
白静(BAI Jing) +3 more
doaj +1 more source
Gaoya dianqi, 2023 GIS内自由金属微粒的运动、集聚行为导致金属微粒在电力设备内部分布广泛，使得绝缘子表面的闪络电压降低，对设备的绝缘状态造成潜在性的威胁。本文搭建自由金属微粒机—电联合试验平台，研究机—电共同作用下尖端电极中金属微粒的放电特性与运动特性，总结出工频电压和机械振动对于金属微粒起跳及运动行为的影响规律。试验结果表明尖端电极下，球形微粒与线性微粒均保持在底电极上沿弧面进行小幅滚动，增加工频电压幅值会使得微粒沿弧面晃动的上下界高度提升，增加机械振动幅值会使得微粒出现一定的起跳动作，且运动的随机性增加 ...
王博 +5 more
doaj
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Biodegradable Zn‐based alloys are promising candidates for temporary implants, yet excessive Zn2+ release during degradation may induce cytotoxicity and adverse tissue responses. In this study, Zn‐xBa alloys (x = 0.1 wt%, 0.5 wt%, 1.0 wt% and 3.0 wt%) were developed to achieve controlled corrosion behaviors with improved biocompatibility.
Liu‐Dang Fang +9 more
wiley +1 more source
Shuitu Baochi Xuebao, 2017 探讨樟子松人工林林下土壤粒度特征随林分密度的变化及影响，以期为毛乌素沙地以樟子松为建群种的植物固沙模式提供理论依据。以陕西省榆林市珍稀沙生植物保护基地内8个密度梯度（925～2 700 株/hm2）的沙地樟子松人工林为研究对象，分别采集0—20，20—40 cm 2层土壤样本，测定土壤粒度组成，计算分析平均粒径、标准偏差、偏度、峰态值和分形维数。结果表明：研究区各层土壤粒度组成以砂粒为主，其次是粉粒、黏粒；粒度特征整体呈现粒径较粗、分选较差、偏态正和峰态为中至窄的特点，土壤分形维数分布于1.422～2 ...
马成忠, 丁国栋
doaj