Results 21 to 30 of about 9,915 (147)
Zhejiang Daxue xuebao. Lixue ban, 2022 为加快张量积型Said-Ball曲面渐近迭代逼近法的收敛速度，探讨了张量积型Said-Ball曲面渐近迭代逼近法的预处理技术。首先利用对角补偿约化技术构造了预处理子，然后结合矩阵Kronecker积性质，采取预处理渐近迭代逼近法求解张量积型Said-Ball曲面。为进一步降低计算量并提高算法的稳定性，利用广义极小残差法求解预处理方程，得到预处理渐近迭代逼近法的非精确求解方法。分析了预处理渐近迭代逼近法及非精确求解方法的收敛性。最后用数值实例说明预处理子能大大减小迭代矩阵的谱半径 ...
QUANHaorong(全浩荣) +4 more
doaj +1 more source
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT The detection of volatile organic compounds (VOCs) holds significant implications in environmental monitoring and disease diagnosis. Traditional gas detection technologies are constrained by complex operation and high cost, thereby failing to satisfy real‐time detection demands.
Yuening Wang +11 more
wiley +1 more source
Effects of Tusi Erxian Decoction on sperm motility, malondialdehyde and superoxide dismutase in seminal plasma of asthenospermia patients with syndrome of deficiency of kidney yang [PDF]
, 2017 目的:探讨菟丝二仙汤治疗肾阳虚型弱精子症的疗效及相关机制。方法:180例肾阳虚型弱精子症患者随机分为菟丝二仙汤组、右归丸组、西药组(辅酶Q10胶; 囊、维生素E、维生素C),每组60例,分别治疗3个月。比较各组治疗前后精液参数,检测精浆丙二醛(MDA)和超氧化物歧化酶(SOD)变化,比较临床; 疗效。结果:菟丝二仙汤组在改善a级精子、精子活力、精子活率明显优于右归丸以及西药组 ...
卢太坤 +5 more
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Carbon‐Insertion‐Engineered WS2 Hierarchical Heterostructure Enabling Superior Sodium‐Ion Storage
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Tungsten disulfide (WS2) is considered a promising anode material for sodium‐ion batteries (SIBs). However, its practical application is hindered by poor electrical conductivity, large volume changes during cycling, and sluggish ion diffusion kinetics, which lead to unsatisfactory electrochemical performance.
Xiuli Hu +9 more
wiley +1 more source
He jishu质子治疗作为一种先进的放射治疗技术，因其精准的剂量分布和对周围正常组织的最小化损伤而受到重视。质子束的精确剂量测量是确保治疗效果和安全性的关键。光纤剂量计因其独特的优势（如高空间分辨率、实时监测能力、水等效性和抗电磁干扰能力）成为质子治疗剂量学研究的热点。本文综述了光纤剂量计在质子治疗剂量测定中的技术原理、应用现状、发展挑战和未来趋势。首先，本文概述了光纤剂量计的发光机制，并对它们的工作原理进行了介绍；其次，本文讨论了基于不同发光机制的光纤剂量计在临床质子治疗中的实用性、对高剂量率适应性和准确性，同时 ...
王 明 +6 more
doaj +1 more source
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Regulating negative parameters of metacomposites is mainly limited by their unclear mechanisms, which affects their practical applications in new sensing, communication, electromagnetic (EM) protection and other fields. This work proposes a dual‐functional competitive design strategy based on the waste corncob‐derived carbon/polyaniline ...
Qiuyun Yang +4 more
wiley +1 more source
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT The monoclinic CuNb2O6 (M‐CNO) with a columbite structure is a potential anode candidate for advanced lithium‐ion capacitors (LICs). However, its practical application is plagued seriously by the irreversible phase transformation and sluggish kinetics.
Xu‐Ting Li +6 more
wiley +1 more source
EFFECT of PCBs (AROCLOR 1254) on SPERMATOGENESIS in TESTIS of MOUSE [PDF]
, 2009 多氯联苯（PCBs）是一类由人工合成的氯代芳烃类化合物，被称作潜在的内分泌干扰物。由于他们具有类雌激素和抗雄激素的性质，对雄性生殖系统造成极大危害，导致不育和一些性激素依赖的生殖功能丧失。他们能够引起内源性系统改变，类似天然性激素，并抑制性激素实现其功能。 本文目的是研究多氯联苯对雄性小鼠生殖系统的睾丸生长与发育的影响。雄性小鼠随机分成五组，每组21只。采用不同浓度Aroclor1254（0，0.5，5，50，500µg/kg）对小鼠进行灌胃染毒，每星期三次。暴露50天后处死小鼠，称其体重 ...
Joao Manuel Lopes Moreno
core +3 more sources
In Situ Uniform Lithium Enrichment for Dense, High‐Performance LLZO Solid Electrolytes
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT A major challenge in garnet‐type Li7La3Zr2O12 (LLZO) system all‐solid‐state electrolytes is the high porosity that typically remains after sintering, which compromises ionic conductivity and degrades battery cycling performance. To address this, we propose an innovative strategy to achieve uniform lithium enrichment on the surface of ...
Yi‐Yang Xiao +8 more
wiley +1 more source
A preliminary study on relation of seven metals content with humen semen quality [PDF]
, 2010 本实验通过电感耦合等离子体质谱法（ICP-MS）测定精浆中七种金属（铅、镉、铬、锰、铜、砷、硒）的含量并检测精浆酸性磷酸酶（ACP）和α-葡萄糖苷酶的活性，与精液各项指标（精子密度、精子活动率、精子正常形态率等）进行相关性分析。得到以下结果：1.金属元素含量与精子活动率之间存在负相关性。精子活动率越高的样品中，金属含量越低；除镉元素外，其他元素含量与精子密度呈负相关。其中：铜、砷、铅三种元素与密度呈显著相关（PCu=0.002，PMn=0.007，PPb=0.009）；除硒、镉外 ...
李萍
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