Results 41 to 50 of about 13,205 (168)
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Managing diabetic wounds requires simultaneously addressing their infectious, oxidative, and regenerative impairments. To address this, this study integrates a piezoelectric BiOCl@CuSe heterojunction (PFM‐verified) into an injectable F127/HA hydrogel, creating an ultrasound‐responsive smart dressing.
Jiayan Guo +5 more
wiley +1 more source
Simulation Analysis and Optimization of Coach Seat and Passenger Coupling Impact System [PDF]
, 2015 据相关资料表明，在客车碰撞所造成的人员伤亡中，因乘员与座椅之间的二次碰撞或座椅与车体相连部位的失效占了相当大的比例。为了提高我国客车在碰撞事故中对乘员的保护能力，客车座椅及其固定点强度的国家标准GB13057-2014目前已从推荐性标准升级为强制性实施标准。为了保证所设计的座椅能满足新法规要求，必须深入研究客车座椅及其固定支架的结构变形及乘员在碰撞过程中的伤害情况。 汽车碰撞过程是一个瞬间的复杂的物理变形过程，它包含了几何非线性，材料弹塑性变形非线性和零部件间复杂的接触非线性等特征 ...
卢琳兆
core
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT With the growing severity of volatile organic compounds (VOCs) pollution, metal‐organic frameworks (MOFs)‐derived materials offer a promising solution through efficient photothermal catalysis. In this paper, M‐MnOx (M = Cu, Ni, Co, Fe) catalysts derived from manganese‐based MOFs were successfully prepared by the sacrificial template method and
Yizhong Liao +10 more
wiley +1 more source
An Empirical Study on the Efficiency of Optimal Portfolio Selection Models [PDF]
, 2016 从Markowitz的均值-方差模型开始，投资组合选择一直是金融领域的一个热门话题，因而学术界对此进行了大量的研究也获得了很多卓有成效的理论成果。但由于估计误差的存在，这些理论上很优异的模型在投资实践中的表现往往不尽如人意，更有学者指出最优化投资组合模型还不如均分模型。因此，本文着眼于中国市场，用A股股市数据对投资组合选择模型的有效性进行了实证研究。本文选取了上交所和深交所正常交易的所有A股公司的月度收益率数据，并将它们分别构成了10个规模投资组合、10个账面市值比投资组合以及25个Fama ...
胡聪
core
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT The large‐scale application of titanium is limited by its high production costs, as well as its low utilization and recycling rates. Therefore, efficient recovery of titanium scrap offers a viable pathway to reduce its cost. Molten‐salt electrolysis offers a promising route for upcycling titanium scrap, but the conventional method, which ...
Haoyu Fang +4 more
wiley +1 more source
Gaoya dianqi, 2015 文中建立了风电场经两种拓扑结构的VSC-MTDC并入电网的模型,两种模型为串联模型和并联模型,并基于两种拓扑结构的比较结果对多端柔性直流输电控制器进行了优化。仿真模型主要包括:风电场等效聚合模型,风电场换流站控制器,直流电缆的Bergeron模型。优化方法采用单纯形算法。将两种拓扑结构的模型进行了仿真分析,仿真结果显示,在考虑到受交流系统扰动以及风电场侧切机情况下的稳定性,并联系统更加适合海上风电场经柔性直流输电并网。采用单纯形优化后的VSC-MTDC动态响应能力相对于优化改进前有了很大的提高。
于永生 +3 more
doaj
Using Genetic Algorithms to Pick Stocks and Manage Portfolio in Technical Analysis System [PDF]
, 2016 在投资领域，如何高效地进行资产配置、获得高收益并控制风险是每个投资者进行投资决策时最为关注的问题，如何有效地选股和进行投资组合管理是一个广泛存在的难题。技术分析是主流的选股方法之一，是通过分析历史的市场数据如股价、成交量等，来预测股票未来的趋势的一种投资分析方法；遗传算法是模拟自然界物种进化的随机全局搜索最优解的算法，目前广泛应用于组合优化、机器学习、自适应控制、信号处理等领域；证券投资组合优化问题的实质就是有限的资产在具有不同风险收益特性的证券之间的优化配置问题 ...
王振华
core
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Diabetic wound infections are a common complication of diabetes, which severely impact patients' quality of life. Effective treatment of diabetic wound infections remains one major challenge in the clinic, partially due to the formation of bacterial biofilm and antibiotic resistance.
Liang Zhou +8 more
wiley +1 more source
Models and Algorithms of Compressed Sensing Magnetic Resonance Imaging under Tight-Frame Image Representation [PDF]
, 2016 压缩感知（CS）技术在加速磁共振成像（MRI）上已经展示非常大的潜力，该技术简称为CS-MRI。它首先通过减少k空间采样数据来加速成像，然后再求解约束图像稀疏性的最优化问题从欠采样的k空间数据中恢复出完整的磁共振图像。如何从有限的数据中快速地重建出高质量的磁共振图像是CS-MRI面临的主要挑战之一。在典型的CS-MRI重建中，正交变换通常用于图像稀疏表示，变换的正交性也使得求解最优化模型具有快速重建算法。近年来，冗余的变换(或字典)因其在磁共振图像稀疏表示的优越性而越来越多地应用于CS-MRI ...
刘运松
core
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Sodium‐ion batteries (SIBs) have emerged as promising candidates for large‐scale energy storage due to their cost‐effectiveness and resource abundance. However, challenges such as sluggish ion diffusion kinetics, structural degradation, and interfacial instability hinder their practical applications.
Yunze Wang +7 more
wiley +1 more source