Results 31 to 40 of about 1,128,528 (166)
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT TiFe‐based hydrogen storage alloys have garnered significant attention because of their cost‐effectiveness, high hydrogen capacity, and favorable hydrogen absorption/desorption characteristics. However, practical application was limited by activation challenges and sensitivity to environmental poisoning.
Yuehai Li +8 more
wiley +1 more source
Jixie chuandong, 2000 根据模糊分析和运用可靠性设计的基本理论 ,结合最优化设计技术 ,提出了渐开线少齿差行星传动的模糊可靠性优化设计方法 ;在考虑了全部变量的随机性和离散性约束条件中含有模糊关系和模糊可靠度要求的情况 ,以体积最小为目标建立了行星传动的模糊可靠性优化设计数学模型 ,并给出了优化方法和结果分析。
王剑彬
doaj
Journal of Critical Infrastructure Policy, Volume 7, Issue 1, Spring/Summer 2026.ABSTRACT The relationship between information and communication technology (ICT) infrastructure and environmental quality remains a critical issue for developing regions such as the ECOWAS member states. While some scholars argue that ICT infrastructure exacerbates environmental degradation, others contend that it can enhance environmental performance.
Kouakou A. Yao +2 more
wiley +1 more source
Gaoya dianqi, 2012 现阶段GCB/GIS可靠性设计相对薄弱,断路器传动轴是GCB/GIS连接操动机构驱动机械与灭弧室的关键零部件,笔者建立传动轴强度-应力（SSI）设计模型,以强度、应力基本数据处理方法探讨传动轴可靠性设计,为GCB/GIS结构进行可靠性设计尝试新思路。
刘景博 +6 more
doaj
Gaoya dianqi, 2023 目前中国弹簧操动机构的凸轮优化设计都是针对四连杆机构，对五连杆机构的凸轮优化设计研究较少，目前五连杆机构的凸轮设计还是依靠经验，无法使输出力特性与负载特性合理匹配，导致五连杆机构存在合闸速度大、合闸不可靠的问题。文中根据能量守恒定律提出了一种五连杆弹簧操动机构的凸轮优化设计方法。该方法根据合闸过程中不同位移点的阻力矩，通过设置凸轮轮廓线上对应点动力矩的裕度，使输出力特性根据负载特性的变化进行合理匹配，以获得理想的合闸速度，提高合闸可靠性。试验验证表明，该方法优化后的凸轮即使在合闸弹簧衰减20%能量后 ...
吴小钊, 郑晓果, 李燕燕
doaj
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT The B2 phase is a critical strengthening constituent in AlxFeCoCrNi high‐entropy alloys (HEAs), and introducing such phases onto the nanoscale cellular substructures is an ideal pathway for strengthening alloys fabricated by laser powder bed fusion (L‐PBF).
Xiangjian Zhu +5 more
wiley +1 more source
Review of additively manufactured zinc alloys by laser powder bed fusion for biomedical applications
Rare Metals, Volume 44, Issue 11, Page 8262-8291, November 2025.Graphical abstract AbstractZinc (Zn) and its alloys have emerged as promising candidates for biomedical materials, owing to their controlled degradation kinetics, intrinsic biocompatibility, and the release Zn2+ ions which are known to promote bone regeneration and tissue healing.
Xuan Yang +5 more
wiley +1 more source
Infrastructure and Poverty Traps
Poverty &Public Policy, Volume 17, Issue 3, September 2025.ABSTRACT This paper investigates whether infrastructure development helps poor economies escape low‐income traps or transition to higher‐income levels. Infrastructure has always been central to development policies and is critical for achieving the SDGs.
A. Olatunji, L. Ado‐Kofie, B. Ouattara
wiley +1 more source
Ultrasound in Obstetrics &Gynecology, Volume 66, Issue 3, Page 290-297, September 2025.ABSTRACT Objective The purpose of this cost‐utility analysis was to model the clinical and economic impact of three cervical‐length screening strategies among low‐risk twin pregnancies: two‐step universal screening (at 18–20 and 20–22 weeks), one‐step universal screening (at 18–20 weeks) and no screening.
Y. Khaikin +4 more
wiley +1 more source