Results 41 to 50 of about 24,495 (196)
Jianzhu Gangjiegou Jinzhan, 2012 新型金属管混凝土长柱构件稳定性是必须要考虑的一个重要问题。根据高强钢的初始缺陷小于普通钢材,给出了高强钢管混凝土的稳定系数计算公式及常用高强钢管混凝土柱的稳定系数表。由于不锈钢应力-应变曲线没有明显的屈服点和屈服平台,及其弹性模量略小于普通钢材,给出了不锈钢管混凝土柱的稳定系数计算公式及常用的稳定系数表。根据铝合金结构设计规范中铝合金结构稳定系数的计算公式,考虑"统一性"原理,给出了铝合金管混凝土柱的稳定系数计算公式及常用的稳定系数表。并通过有限元模拟结果验证了3种金属管混凝土稳定系数计算公式的正确性。
宫永丽, 查晓雄
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Zhongguo shiyan zhenduanxue, 2022 目的 探讨慢性阻塞性肺疾病（COPD）患者血清IL-34水平变化与患者肺功能的关系。方法 选取2018年1月至2019年12月南部战区总医院收治的COPD患者106例，分为COPD急性加重组（57例）和COPD稳定组（49例）。另选取体检健康者50例纳入对照组。采集血清样本，分别检测3组血清样本中IL-34的表达及肺炎衣原体特异性IgG、IgM、IgA抗体滴度，同步测定COPD患者肺功能，分析IL-34表达变化及其与COPD患者肺功能的关系。结果 与COPD稳定组及对照组相比，COPD急性加重组血清IL-
李永强 +5 more
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Single‐atom catalysis hinges on fundamental challenges in precisely controlling metal‐support interactions and rationally regulating metal–adsorbate relationships. Herein, we report a universal strategy for constructing highly efficient and well‐defined Cu(I) single‐atom catalysts based on a trifurcate AlL3 molecular support.
Donghui Zhang +9 more
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT High‐entropy alloys (HEAs) have attracted considerable interest from researchers owing to their tunable chemical compositions, exceptional structural stability, and promising catalytic properties. However, their large‐scale application is often hindered by complex manufacturing techniques and poor durability.
Sheng Guo +9 more
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT The development of sodium‐ion batteries (SIBs) is limited by slow charge transfer kinetics and large material volume changes caused by the large radius of Na+. Leveraging the excellent physicochemical properties and unique heterostructures of metal selenides, ultrafine hetero‐CuFeSe2‐CoSe2 nanoparticles are in situ wrapped by ...
Ying Zhu +5 more
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Shuitu Baochi Xuebao, 2023 微团聚体是土壤团粒结构的基本组成单元,较大团聚体具有更强的稳定性,其形成与稳定对于土壤有机碳的长期吸存起着决定性作用。目前关于微团聚体形成与稳定性的研究多专注于农业土壤,红壤侵蚀地植被恢复后土壤团聚体稳定性、有机碳分布及微生物群落特征研究也主要集中在大团聚体上,而土壤微团聚体的动态变化及其主要影响因素尚不明确,对于其内在机制更缺乏了解。通过总结土壤微团聚体的形成过程及稳定性,综述了凋落物、根系和菌根对土壤微团聚体形成与稳定的影响,阐述了土壤微团聚体内微生物群落 ...
黄荣珍 +8 more
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT The development of highly efficient and stable nonprecious metal electrocatalysts for the acidic oxygen evolution reaction (OER) is crucial to advance proton exchange membrane (PEM) water electrolysis. In this work, a dual synergistic strategy was proposed by constructing a Ce‐modified MnO2/MnO heterostructure.
Chuanbin Li +7 more
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Zhongshan Daxue xuebao. Yixue kexue ban, 2015 目的】 探讨MRI评估前交叉韧带重建术后膝关节稳定性的价值?【方法】 对158例符合条件的前交叉韧带重建术后患者进行MRI扫描及膝关节临床稳定性检查,分析骨隧道?移植物及内固定装置的影像表现并与临床检查结果对比?依据临床检查将患者分为膝关节不稳组(26例)及稳定组(132例),比较两组胫骨?股骨骨隧道内径的变化,比较两组在骨隧道内口位置?移植物表现及内固定装置的MR征象阳性率;Kappa一致性检验骨隧道内口位置?移植物及固定装置的MR表现和临床检查结果的一致性,计算上述MR征象诊断膝关节稳定性的敏感度 ...
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Zhongguo youzhi为提高核桃蛋白Pickering乳液的稳定性，以核桃蛋白纳米颗粒（Nano-WPI）为稳定剂制备Pickering乳液，分析不同pH（2.0～8.0）和NaCl浓度（0～400 mmol/L）对Pickering乳液乳化活性、粒径、流变特性、热稳定性和贮藏稳定性的影响。结果表明：Pickering乳液稳定性随pH增加先降低后升高；pH为8.0时，Pickering乳液乳化活性最大（32.79 m2/g），平均粒径为3.33 μm，乳液呈弱凝胶特性，热稳定性和贮藏稳定性良好，综合性能最佳 ...
刘炯娜，张恒瑄，蒋雨心，范方宇 LIU Jiongna, ZHANG Hengxuan, JIANG Yuxin, FAN Fangyu
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