Results 31 to 40 of about 44,854 (164)
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT The high operating temperatures and sluggish kinetics of Mg‐based hydrogen storage materials (HSMs) are urgently being addressed. In this work, a novel Mg–Ni–Ga HSM with dual‐phase synergistic catalysis is developed, including the fishbone‐like Mg3Ni2Ga1 catalytic phase and the Mg2Ni phase with stacking faults (SFs).
Shiyang Hu +7 more
wiley +1 more source
Zhongshan Daxue xuebao. Yixue kexue ban, 2008 【目的】建立小型猪正畸牙根吸收动物模型,观察不同力值作用于小型猪下颌乳侧切牙后的牙根吸收情况,研究不同力值对小型猪牙根吸收程度的影响,为正畸临床实践中预防牙根吸收提供参考。【方法】选用北京农业大学提供的6只中国实验用小型猪,5～7月龄,体质量12～16kg(平均体质量13.2kg),共12颗下颌乳侧切牙,随机分为四组,分别施加力值0、100g、200g、300g,每2周加力1次,术后45天切取标本,连续切片后HE染色,行普通光学显微镜形态观察和图像处理分析,并对牙根吸收指数进行统计学分析 ...
谢永建 +4 more
doaj
Enhanced Upconversion Luminescence of Metal-Capped NaGd0.3Yb0.7F4:Er Submicron Particles [PDF]
, 2016 镧系掺杂上转换发光材料因其独特的发光性质在太阳能电池、生物医学等众多领域都具有广阔的应用前景，但其相对较低的发光效率一直是阻碍大规模应用的主要原因。因此寻找合适的手段来高效地提高材料的上转换发光效率是目前的研究热点。研究表明，通过金属微纳结构的表面等离激元可以有效提高材料的上转换发光效率。理论计算显示，当等离激元微腔的尺寸在约200~350nm之间时会形成可见光区的腔模，有可能进一步增强镧系离子的上转换发光。而目前通过主流合成方法获得的上转换发光材料的尺寸通常在10~50nm之间 ...
吕梦云
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Moisture‐enabled electricity generation technology offers a new paradigm for sustainable energy harvesting, but its practical applications are still limited by issues such as low output power and insufficient long‐term stability. In this paper, an asymmetric sandwich‐structured hydrogel moist–electric generator (SSHMEG) with an ion ...
Peng Chen +7 more
wiley +1 more source
Research on Chinese loadwords in Ming and Qing dynasties [PDF]
, 2016 吸收外来词是汉语词汇发展史上的重要现象，同时也是语言接触与文化交流的结果。汉语吸收外来词具有漫长的历史。比如：从两汉到隋唐时期，佛教文化被中国文化吸收，大量佛教词汇传入汉语并极大地丰富了汉语词汇系统，其中一些词在现代汉语中仍然经常被使用，如：“佛”、“地狱”、“忏悔”、“庄严”、“圆满”等。目前学术界对汉语外来词的研究虽然取得了一些成果，但多停留于共时层面的分析描写，对外来词的“史”的研究还极其匮乏，尤其缺乏不同时段汉语外来词发展史的专题研究。 明清在中国历史上是中国与西方社会密切接触的时期。自明末起 ...
赵明
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Political Trust and Aspirations to Influence Social Media During a Crisis: A Longitudinal Study
Policy &Internet, Volume 18, Issue 1, March 2026.ABSTRACT This study investigated how political trust shaped citizens' aspirations to influence others on social media during a COVID‐19 pandemic. Using four‐wave longitudinal survey data (2017–2021; N = 2172) collected from 543 citizens in Finland, we first analysed how political trust moderated the temporal development of individuals' aspirations to ...
Aki Koivula +2 more
wiley +1 more source
Guangtongxin yanjiu, 2015 随着集成光路复杂度的增加,需要在不影响系统正常工作的情况下,在链路内使用光功率监测器对集成光路进行实时监测,有效地进行器件行为分析。文章综述了硅基光功率监测器的最新研究进展。重点阐述了表面态吸收、双光子吸收、锗吸收以及缺陷态吸收机制下的光功率监测方案以及各自的优缺点,最后详细讨论了利用缺陷态吸收机制实现光电转换的巨大优势。
卫欢 +8 more
doaj
Preparation and antioxidant activity of synthesized vanadyl （Ⅳ） trehalose and vanadyl （Ⅳ） carboxymethyl trehalose [PDF]
, 2013 对合成的钒氧海藻糖和钒氧羧甲基海藻糖的结构进行红外光谱分析,并利用ICP-MS测定钒的含量分别为2.9%和3.2%。同时对钒氧海藻糖和钒氧羧甲基海藻糖清除羟基自由基与DPPH自由基的能力进行研究,结果表明,钒氧海藻糖和钒氧羧甲基海藻糖清除DPPH·的能力和清除·OH的能力均比配体的清除能力有显著提高。此外 ...
冯大伟 +4 more
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT In conventional piezoceramics, the coordinated change between the dielectric constant (εr) and the piezoelectric charge constant (d33) usually limits the piezoelectric voltage constant g33 (g33 = d33/εr), a critical figure of merit for piezoelectric sensors.
Xiaoying Feng +7 more
wiley +1 more source
Progress of dye-sensitized water-splitting for hydrogen production [PDF]
, 2006 The mechanism of dye-sensitized water-splitting for hydrogen production is introduced. Research works on the use of different dye molecules and redox mediators are reviewed.
Leung, MKH, Leung, YC, Ni, M
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