Results 31 to 40 of about 571,238 (180)
Poverty &Public Policy, Volume 18, Issue 2, June 2026.ABSTRACT Rapid urbanisation and persistent socio‐economic inequality continue to entrench multidimensional poverty within South Africa's urban informal settlements, with women and female‐headed households experiencing disproportionate deprivation. This study analysed primary household survey data collected in 2023 from 322 households across three ...
Adrino Mazenda +3 more
wiley +1 more source
智能科学与技术学报, 2019 由于固有的问题复杂性和计算复杂度，三维重建是计算机视觉研究和应用领域非常重要且富有挑战性的课题。目前已有的三维重建算法往往会导致重建的三维模型上存在着明显的空洞、扭曲失真或者模糊不清的部分，而基于机器学习的三维重建算法往往又只能重建简单的分离物体，并表示成三维体元形式。所以这些算法框架对于实际应用来说都还远远不够。从 2014 年起，生成对抗网络被广泛应用于半监督学习，以及产生非真实数据集的应用中。所以本文的重点是采用生产对抗网络原理，来获得高质量的三维重建效果。提出了一种新颖的半监督三维重建算法架构 ...
余翀
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Atom Probe Tomography‐Based Analysis of Residual Trace Elements in Advanced Metallic Materials
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Residual trace elements inherited from raw materials strongly influence the mechanical and environmental performance of advanced metallic alloys and recycling materials due to preferable boundary/interface segregation and resultant embrittlement effects, yet their parts per million level concentrations pose significant challenges to ...
Congcong Li +17 more
wiley +1 more source
Zhongshan Daxue xuebao. Yixue kexue ban, 1988 体外应用RE25-3食管癌细胞系观察了三种维甲类——维甲酸:维胺酯及维胺酸的作用。三种维甲均使细胞的分裂增殖受到抑制,3H-TdR掺入到DNA中减少。染色体数目减少,甚至转化过程中丧失的二倍体重又出现,此外还使细胞的集落形成能力受抑。三者中以维胺酸作用最强;维胺酯与维甲酸相近。
何为民
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Atomically Thin Sn:GaN‐GaN Homojunction for High‐Sensitivity β‐Ray Detection
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Gallium nitride (GaN), a third‐generation wide‐bandgap semiconductor renowned for its superior radiation tolerance, holds promise for advanced β‐ray detection. Herein, a scalable liquid metal‐assisted in situ synthesis method is presented to fabricate Sn‐doped GaN homojunctions via gallium oxide printing followed by ammonolysis, enabling ...
Weiqing Liu +8 more
wiley +1 more source
四川大学学报. 自然科学版, 2008 在研究了现有气象雷达三维风场反演的VVP方法的基础上,提出了一种新的基于三维风场均匀分布假设的三维风场VVP反演算法.采用提出的算法,进行了模拟风场和雷达实测风场的反演实验.按照实验结果进行了反演误差分析.理论和实验结果证明采用风场均匀分布假设的VVP方法,反演的三维风场与雷达实测的三维风场比较吻合.
余艳梅, 冯启航, 谢明, 吴晓红
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Kinetic‐Controlled Growth of Iron Chalcogenide Nanosheets Featuring Besnus Transition
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Two‐dimensional (2D) Fe‐based nanosheets have sparked wide attention owing to exotic magnetism, superconductivity and topological phases. However, the synthesis of 2D FemXn (X = Te/Se/S, m, n: integer), typically in a non‐stoichiometric ratio, remains challenging because of narrow thermodynamic windows.
Hongmei Zhang +11 more
wiley +1 more source
Zhongshan Daxue xuebao. Yixue kexue ban, 2001 【目的】对比研究常规X 线、二维CT 和三维CT 对颌骨肿瘤显示的优缺点。【方法】对51 例颌骨肿瘤患者行常 规X 线、二维CT 和三维CT 检查, 比较分析三种检查方法对颌骨肿瘤显示的特征, 并与手术病理结果相对照。【结果】对下颌 骨肿瘤三种检查方法均能有效地显示, 以三维CT 显示得最为直观明了。对上颌骨肿瘤, 三维CT 通过旋转与切割, 能够立体 直观地显示肿瘤的部位、大小、形状及毗邻关系, 尤其对腭板、眶下壁以及颅底骨质破坏的显示更具优越性;二维CT 对肿瘤的 囊性或实性改变 ...
崇锦, 冉 炜
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Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT NiTi shape memory alloys (SMAs) show excellent performance in vibration damping and corrosion resistance. However, due to low hardness and lack of self‐lubrication, they suffer severe friction and wear during service. Although various strategies including doping and heterostructure design have been proposed, the effects are unsatisfactory.
Huwen Ma +13 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2019 目的研究三维彩色多普勒超声在甲状腺功能亢进症(Graves病)诊断中的应用价值。方法选取本院2017年1月-2018年1月间确诊的65例Graves病患者作为研究资料,选取同期在本院接受健康体检的65位健康受检者作为对照组,对比两组患者甲状腺彩色多普勒超声(彩超)参数、三维彩色多普勒超声(三维彩超)参数的差异性;以确诊结果为金标准,分析彩超、三维彩超诊断结果与金标准间的一致性,计算诊断效能指标;以受试者工作特征(ROC)曲线参数曲线下面积(AUC)分析彩超、三维彩超的诊断价值。结果疾病组甲状腺动脉管径 ...
黄浦
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