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Poverty &Public Policy, Volume 18, Issue 4, December 2026.ABSTRACT Despite efforts, food security remains an elusive goal in rural Africa. Without robust safety nets, households employ alternative coping strategies, including internal and international migration to leverage remittances. Using data from a 2024 nationally representative cross‐sectional survey of 17,942 rural households conducted by the Zimbabwe
Dephine Mazambani +2 more
wiley +1 more source
, 1988 本文应用三维有限元分析了牙周膜的应力分布。重点讨论了根尖区应力分析结果及其对临床解释病因及对诊断的意义。本文将右下第一恒磨牙有限元模型划分为210个单元及1612个节点(用20节点等参元),分析了11种典型受力状况,得出以下结论:(1)在(牙合)面上通过牙周膜几何中心的各种外力在根尖区产生的应力分布均匀,且应力值较小,无拉应力产生;(2 ...
阚常珍 +4 more
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Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT This study systematically investigates the creep behavior of an Al19Co21Fe20Ni40 eutectic high‐entropy alloy (EHEA) at 500°C, focusing on the synergistic effects of heterostructure design and trace boron doping. Thermomechanical processing was employed to produce a heterostructure consisting of alternating lamellar and equiaxed regions.
Xudong Liu +7 more
wiley +1 more source
Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT The separation of light olefins is a crucial process in the petrochemical industry, and developing advanced adsorbent materials is very significant. Aluminum (Al) cluster‐based heterometallic frameworks possess great application prospects but have rarely been investigated for separation applications.
Song‐Yan Sui +4 more
wiley +1 more source
Zhongshan Daxue xuebao. Yixue kexue ban, 2022 膝关节植入物常被用来替换膝关节受损组织，恢复膝关节的正常功能和关节内正常的应力分布。有限元分析（FEA）可利用有限的、相互连接的单元对膝关节植入物植入后的膝关节应力进行精准、快捷的计算，直观的展现植入物植入后的膝关节应力分布情况。本研究通过中国知网、Web of Science、PubMed等数据库调研FEA在膝关节植入物生物力学研究中应用的相关文献，以人工膝关节、人工半月板和前交叉韧带移植物为主体，阐述了通过FEA分析植入物在不同材料结构设置和植入条件下对术后膝关节应力分布的影响 ...
邵佳升, 宋剑
doaj
Jixie chuandong, 1991 齿轮传动设计中,关于齿轮的接触强度,传统的表层应力计算是建立在赫兹干接触分析基础上的,这与齿轮传动的实际工况颇有差别。本文考虑了动态——瞬态弹流润滑对直齿轮表层应力的影响,经数值计算发现,与干接触情况相比,最大表层当量应力更接近表面,并向出口区偏移,且由于轮齿接触区的压力分布和剪应力分布存在二次峰,表层当量等值应力分布有明显的变化。
张和豪, 华东耘, 詹胜龙
doaj
Overdischarge Induced Porous Graphite for Upcycling of Spent Lithium‐Ion Batteries
Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT The upcycling of spent lithium‐ion batteries (LIBs) into high‐performance materials offers both economic and environmental benefits. In this study, the principle of battery discharge‐induced copper dissolution and deposition is applied to fabricate a graphite/nanocopper composite anode.
Yadong Wang +13 more
wiley +1 more source
, 2013 本发明公开了一种残余应力测试分析的局部热扰动方法，包括如下步骤：1）对材料的待测区域加热至该局部区域产生包含初始残余应力贡献的足够大的弹性变形，同时通过红外测温单元测量关键点温度，并通过摄像单元采集所述材料的表面变形过程的图像信息；2）根据所述图像信息通过计算得到热扰动后该局部区域的视应变场εSH，同时，基于有限元法计算局部加热所形成的温度场，并根据温度场T计算得到热弹性应变场εTE；3）根据εSH=εTE+ΔεIN的公式计算得到对应初始残余应力贡献的应变场增量ΔεIN；4）根据公式ΔεIN=[K ...
陈光南, 吴臣武
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Jianzhu Gangjiegou Jinzhan, 2013 为了考察国产Q460高强钢焊接箱形压弯构件的力学性能,以数值积分法和有限单元法对7个已有焊接箱形压弯构件试验进行了数值分析。试件宽厚比分别为8、12、18,长细比分别为35、50、80。介绍的数值模型中考虑了实测的初始挠度、初始偏心及残余应力对构件极限承载力的影响,采用简化的残余应力分布模型、实测残余应力分布与理想弹塑性材料模型、线性强化材料模型相组合,对Q460高强钢焊接箱形压弯构件的极限承载力与荷载-挠度曲线进行了数值计算。为了验证数值分析的准确性,将预测结果与已有试验结果进行了对比,分析结果表明 ...
闫晓雷, 李国强, 陈素文
doaj
World Food Policy, Volume 12, Issue 2, November 2026.ABSTRACT Household food expenditure continues to be a key factor in ensuring the realization of the Human Right to Adequate Food. Particularly in Brazil, access to food can be limited by economic constraints in vulnerable families, especially among farming families, who have been more vulnerable to food insecurity in recent years in the country.
Lucas de Almeida Moura +3 more
wiley +1 more source