Results 21 to 30 of about 23,320 (232)
, 2001 总结了近几年来纳米材料的研究进展，着重从纳米材料的制备、微观结构、力学及热力学性能的研究情况作了一个概述，总结了有关纳米材料的几个研究热点以及分子动力学计算机模拟在纳米材料研究中的应用 ...
刘曰武, 周富信, 文玉华
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Rare Metals, EarlyView.ABSTRACT With the rapid development of the energy storage industry, aqueous zinc‐ion batteries (AZIBs) have attracted considerable attention in the field of energy storage because of their inherent advantages, thereby emerging as a promising research direction with significant potential.
Lingjiao Fu +8 more
wiley +1 more source
Gaoya dianqi, 2015 碟簧作为储能元件是高压断路器用液压操动机构的重要核心部件,其优点是能在很小变形的条件下,承受范围变化很大的载荷。储能碟簧的可靠性直接影响着液压操动机构及高压断路器的整体可靠性。笔者通过碟簧力学特性分析、碟簧应力计算、碟簧力学特性曲线试验、碟簧力学时效性试验及单片碟簧断裂后对整组碟簧性能的影响试验,验证了某高压断路器用液压操动机构储能碟簧的可靠性。
周仙娥 +3 more
doaj
Investigation on optimal thermoeconomic and thermodynamic performances of the refrigeration cycles using ferromagnetic or Gd-based material as the working substance [PDF]
, 2016 当今社会，能源紧缺和环境污染问题日益突出，探寻节能环保的新制冷技术正吸引着越来越多的注意力。具有高效节能、绿色环保、噪音小、结构紧凑的室温磁制冷技术是一种很有潜力的新一代制冷技术的备选。目前，室温磁制冷仍有几大指标需要突破。一是提高制冷机的制冷功率，二是提高制冷机的制冷温跨，三是提高制冷机的热经济性能。当今室温磁制冷发展的两大方向：其一是探索具有高磁热特性的室温磁制冷材料，其二是研制制冷性能指标优的室温磁制冷机。本学位论文是要在提高室温磁制冷机循环的热力学性能和热经济性能方面作出新的有益贡献 ...
徐志超
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Multi‐Functional S‐HA/ASTA NPs Coating on Biodegradable ZE21B Alloy for Cerebrovascular Applications
Rare Metals, EarlyView.ABSTRACT Magnesium (Mg) and its alloys have attracted extensive attention of researchers in the field of cerebrovascular implants due to their good mechanical properties and biosafety. However, rapid degradation and delayed endothelialization pose challenges. To address these issues, this study introduces a multifunctional composite coating.
Aqeela Yasin +4 more
wiley +1 more source
Huli yanjiu, 2008 摘要： （免费在线浏览）急诊科是抢救病人生命的重要场所，护士的临床急救能力直接影响抢救工作的成败［１］。目前急救临床护理教学存在的问题是护生在实习结束后，无法适应临床实践的要求。研究表明，很多护生在护理实践中感到不适应和不能形成复杂的临床技能，因此提倡以能力为中心的护理教育改革［2］。 以问题为基础学习（Problem-based learning，PBL）可以提高学生发现问题、分析问题和解决问题的能力，增强学生创造性思维能力的培养，激发学生的主动性和积极性、培养学生自我提高的能力［3，4 ...
代颖, 王爱平, 董耀东, 张波
doaj
Efficient Simulation Methods for Reinforced Concrete Columns with Encased Steel in High-rise Building Structures [PDF]
, 2016 型钢混凝土柱在建筑结构中往往是主要的承重构件之一，使用合适的数值模型分析其力学性能对高层结构抗震分析有重要的意义。本文综述了目前文献中已有的低含钢率恢复力模型相关研究，分析了其理论、计算流程和算法，并在通用有限元软件OpenSees中编程实现。本文详细推导了模型中基本参数的确定方法，并用于模拟实际高层建筑结构中的型钢混凝土柱。首先，本文用恢复力模型模拟了单根型钢混凝土柱的试验，通过对比验证了模型的精度，研究了其计算效率。其次，本文将恢复力模型用于理想32层高层结构中的单排型钢混凝土构件静、动力分析中 ...
曾志弘
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Rare Metals, EarlyView.ABSTRACT Internal oxidation has been identified as an effective method for enhancing the strength of AgMg alloys. However, the concurrent occurrence of embrittlement remains inadequately understood, thus limiting their broader application. This study investigates the oxidation behavior of AgMg alloys with Mg concentrations ranging from 1 at% to 7 at ...
Hai‐Cheng Zhu +12 more
wiley +1 more source
Rare Metals, EarlyView.ABSTRACT Chlorination roasting has emerged as a promising pyrometallurgical strategy for the selective recovery of lithium from spent lithium‐ion batteries (LIBs). In this study, a natural roasting agent, seawater‐derived chlorides, was employed to selectively extract lithium from spent LiNi0.5Co0.2Mn0.3O2 (NCM523) cathode. MgCl2·6H2O, a main component
Bei‐Lei Zhang +7 more
wiley +1 more source
, 2016 A geothermal well in Ganzi was chosen for the study. To provide a reference for the design and construc?tion of a geothermal plant, power generation techniques were selected and the thermodynamic process was calculat?ed based on cold and heat source ...
卜宪标 +3 more
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