Results 21 to 30 of about 2,893 (165)

Yttrium Addition Co‐Enhances the Plasticity and Corrosion Resistance of TiB2‐Refined Al‐Mg‐Zn Alloys

open access: yesRare Metals, Volume 45, Issue 1, January 2026.
ABSTRACT To address the degradation of corrosion resistance induced by Al‐5Ti‐B grain refiner during the strengthening of Al‐Mg‐Zn alloys, this study innovatively employed a rare earth element yttrium (Y) alloying strategy to achieve synergistic enhancement of mechanical strength and corrosion resistance.
Wen‐Tao Qin   +9 more
wiley   +1 more source

Synthesis and Characterization of Novel Fluorine-Containing Sulfate, Phosphate and Vanadate Compounds [PDF]

open access: yes, 2015
无机开放结构材料具有着许多迷人的性质,在社会的各个领域中均有着广泛的应用。作为无机开放结构材料的一个重要分支,基于[MO4](M=Si、Al、P、B、S等)四面体等构筑而成的化合物在过去的几十年中获得了快速的发展。然而值得注意的是,该类无机化合物中,基于硫酸根基团构筑而成的三维框架结构的研究则很少,这是由于合成方法上的限制所导致的。因此本文系统地探索了新型硫酸盐化合物的合成方法。 此外将F离子引入三维框架结构中可以对材料的结构和性能进行改进,例如为了提高磷酸铁锂的电性能 ...
余子群
core  

Dual‐Rare‐Earth‐Doped Piezoelectric Semiconductor Gallate Solids With Spectral Tuning for Energy Conversion and Photonic Applications

open access: yesRare Metals, Volume 45, Issue 1, January 2026.
ABSTRACT Mechanoluminescent materials have gained significant attention for their unique capability to convert mechanical stimuli into light without external optical or electrical excitation, holding immense promise for applications in safety monitoring, biomedicine, optical anti‐counterfeiting, and intelligent sensing.
Fanlei Qin   +8 more
wiley   +1 more source

三氯化钐对实验性糖尿病大鼠心肌抗氧化能力的影响

open access: yesZhongguo shiyan zhenduanxue, 2012
近年来稀土化合物在农业生产上较为常用,对农作物及动物有增产增效作用,目前已证实植物性食品中含有一定浓度的稀土元素,随着稀土微肥的广泛应用,稀土元素可经食物链进入机体内[1-4],因此稀土对生态环境和人体健康的影响以及对稀土近期及远期生物学效应的研究也越来越引起人们的关注,近年来有些学者报道了较低剂量的稀土化合物经口服、腹腔注射及尾静脉注射可提高机体的免疫力及抗氧化能力[4-6],本实验依据这一点通过对糖尿病大鼠心肌超氧化物歧化酶(SOD)和脂质过氧化物(LPO)的研究 ...
黄可敬, 黄可欣, 李锐, 石搏
doaj  

基于实地和遥感调查的离子型轻稀土尾砂土壤侵蚀对植被修复措施响应

open access: yesShuitu Baochi Xuebao, 2020
稀土开采产生大量尾砂,导致严重土壤侵蚀,伴生水质和地质灾害,评价植被修复措施对稀土尾砂土壤侵蚀治理效果可为措施优选提供理论依据。以寻乌县离子型轻稀土尾砂区为研究区,基于1982—2015年GIMMS NDVI 3 g、DEM等遥感和尾砂理化性状现场调查数据,采用空间代时间方法,结合RUSLE模型及其全微分公式探究不同修复年限土壤侵蚀量对植被修复措施的响应机理。结果表明:1982—2015年研究区土壤侵蚀模数显著下降,倾向率为-60 t/(km2·10a),突变年份为2008年;在植被修复措施实施年 ...
罗建伟, 白桦, 鲁向晖, 赵建民
doaj  

平行夏尔希里:生态资源智能管护及其可持续发展新途径

open access: yes智能科学与技术学报, 2023
新疆夏尔希里自然保护区是一处珍稀生物资源与无法估量的生态价值共融的自然瑰宝,被誉为“中国最后的净土”和“珍稀的天然基因库”。为确保这一自然宝库的可持续发展,提出了“平行夏尔希里”概念,以智能化手段全方位助力其生态资源的精细化管理。核心思想是利用描述智能建立高精度模型,通过预测智能分析生态系统变化,借助引导智能科学地制定保护策略。探索了通过智能科技建立自然保护区管理与应用的新模式,以期推动保护区及其珍贵生物资源的可持续发展。
皮佩定, 倪清桦, 杨静, 康孟珍, 李宣昊, 杜应昆, 王飞跃
doaj   +1 more source

Realizing the Enhanced Electromagnetic Wave Absorption and Self‐Cleaning Pollution in BaFe12O19 Composite

open access: yesRare Metals, Volume 45, Issue 1, January 2026.
ABSTRACT With increasing complex requirement in organic pollution environment, the development of actual electromagnetic wave (EMW) absorbers with high EMW absorption performance and self‐cleaning pollution function is becoming a significant challenge.
Shou‐Hang Lv   +8 more
wiley   +1 more source

Patriotic rabbits or toxic men? Media ideology, entextualization, and enregisterment on Chinese interfaces

open access: yesJournal of Linguistic Anthropology, Volume 35, Issue 2, August 2025.
Abstract This article argues that social actors' media ideologies about digital interfaces are key to the enregisterment of online activities. Focusing on an online register emergent from user activities around Year, Hare, Affair (YHA)—a state‐aligned Chinese animation—I explore how different metadiscourses evaluate this register by entextualizing ...
Jiarui Sun
wiley   +1 more source

低剂量三氯化钐对糖尿病大鼠胃黏膜作用的实验研究

open access: yesZhongguo shiyan zhenduanxue, 2012
目前已证实植物性食品中含有一定浓度的稀土元素,随着稀土微肥的广泛应用,稀土元素可经食物链进入机体内[1-4]。近年来有些学者报道了较低剂量的稀土化合物经口服,腹腔注射及尾静脉注射可使血清中生长激素及胰岛素水平显著升高[5-9],本实验依据这一点探讨口服三氯化钐对糖尿病大鼠胃粘膜的影响,为稀土元素应用于临床以及预防保健提供理论依据。
黄可敬, 黄可欣, 王元春, 石搏
doaj  

Petrochemistry and mineral chemistry studies on metamorphic ultramafic rocks in Yanghou area, Zhenghe Country, Fujian Province, China [PDF]

open access: yes, 1997
Petrochemistry studies indicate that the Yanghou metamorphic ultramafic rocksare composed of metamorphosed harzburgite and burgite and ultramafic cumulate .
Li, JL, Ren, SL, Sun, M, Zhou, XH
core  

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