Results 51 to 60 of about 32,994 (251)
Rare Metals, EarlyView.ABSTRACT Early detection of thermal runaway (TR) is essential for lithium‐ion battery (LIB) safety, as unchecked TR risks catastrophic failures in energy storage systems. Gas‐based sensing offers a faster and more direct approach by detecting decomposition products at the molecular level.
Tianshui Liang +9 more
wiley +1 more source
Fermi Surface Structure Revealed by Quantum Oscillations in Half‐Heusler Semimetal LuAuSn
Rare Metals, EarlyView.ABSTRACT The Fermi surface structure in the half‐Heusler semimetallic compound LuAuSn was systematically investigated using quantum oscillation studies of high‐quality single crystals and first‐principles calculations. Clear bulk quantum oscillation signals were observed for multiple complementary physical properties, including magnetization, Hall ...
Yue Lu +12 more
wiley +1 more source
萨拉乌苏河流域末次间冰阶气候 - 以米浪沟湾剖面为例 [PDF]
, 2007 米浪沟湾剖面末次间冰阶层序粒度和化学元素波动韵律与由古流动砂丘砂和上覆河湖相或古土壤构成的沉积旋回颇为一致。古流动砂丘砂犹如现代流动砂丘砂, 是东亚冬季风主导下干冷气候的产物; 河湖相和古土壤颗粒细化, 化学、生物等地球风化程度增强, 含较多喜暖的软体动物化石, 指示其偏南夏季风主导下的温暖湿润气候。据此, 末次间冰阶萨拉乌苏河流域至少经历了10次温湿(W事件)和9次冷干(C事件)气候波动, 且可划分为MIS3e(58.85~48.98 ka BP)、MIS3d(48.98~39.55 ka BP ...
Chen, D +7 more
core
Dual‐Stage Heat Treatment for Enhanced Hydrogen Storage Properties of Mg−Ni−Y Alloys
Rare Metals, EarlyView.ABSTRACT Mg−Ni−Y alloy is considered to be one of the most promising hydrogen storage materials, but its high dehydrogenation energy barrier hinders its practical application. A dual‐stage heat treatment (490°C × 4 h + 550°C × 4 h) is applied to optimize the microstructure and hydrogen storage performance of a vacuum‐melted Mg94Ni3Y3 alloy.
You Lv +6 more
wiley +1 more source
Gaoya dianqi, 2010 单相自动重合闸是保证电力系统安全稳定的重要举措,在国内外超高压/特高压电力系统中得到了广泛的应用。笔者分析了相电流突变量选相原理及在高压输电线路单相自动重合闸中的应用。用MATLAB7.0仿真了相电流差突变量选相和相电流突变量选相方法,并结合继电保护模块和单相重合闸模块进行仿真分析。结果表明,应用MATLAB对单相自动重合闸故障选相进行仿真分析可获得很好的效果,对理解单相自动重合闸的原理很有帮助。
胥杰 +5 more
doaj
Study of P2-Type Layered Oxides and Mixed-Type Phosphates as Cathode Materials for Sodium Ion Batteries [PDF]
, 2015 随着储能需求的不断增长，钠离子电池作为一类有潜力的廉价能源储存体系开始受到越来越大的关注。为了使钠离子电池在能量密度上具有更强的竞争力，就必须发展具有较高电压的正极材料。正极材料主要可以分为两大类，即氧化物型和聚阴离子型。其中，P2型层状Na-Ni-Mn-O体系和混合聚阴离子型Na4Fe3(PO4)2(P2O7)体系分别在两大类材料中具有相对较高的放电电压。然而，若要使这两类材料体系发挥出较好的电化学性能，仍有许多问题亟待解决。P2型Na-Ni-Mn ...
吴学航
core
Rare Metals, EarlyView.ABSTRACT This study introduces novel nonequiatomic TiZrCoCrMoCux (x = 0, 5, 10; at%) medium‐entropy alloys (MEAx) tailored for orthopedic implants, synergistically combining the biocompatibility of Ti‐based alloys, the wear resistance of CoCrMo alloys, and the antibacterial/osteogenic attributes of Cu. The alloy's microstructure, mechanical properties,
Hang Yu +9 more
wiley +1 more source
500 kV罗平站主变加装中性点限流电抗器电磁暂态研究及设备选型
Gaoya dianqi, 2017 随着电网的发展,部分自耦变压器中压侧电抗常接近于零,导致变压器220 kV侧发生近区单相或两相接地时,故障穿越电流已接近甚至超过变压器可承受短路电流的极限值,为限制罗平站220 kV单相或两相短路电流水平、改善主变运行环境,拟在主变中性点加装限流电抗器。采用最新EMTPE程序,通过对主变接入限流电抗后短路电流水平、过电压及绝缘配合等电磁暂态特性研究,提出了500 kV罗平站主变中性点限流电抗器阻抗选取原则及限流效果、工频及操作过电压水平、流经主变中性点电抗器的工频稳态及暂态电流水平 ...
王典浪, 李东, 杨晓维, 皮天满
doaj
Preparation and formation mechanism of nano-crystalline drug by a biomimetic crystallization pathway [PDF]
, 2016 现有的新药开发过程中，大量的候选药物因其体内生物利用度低，而无法得到最终的开发应用。近年来，已有众多研究表明将难溶性药物制成纳米晶体的形式可以有效改善其生物利用度，并且纳米药物晶体制备工艺具有安全、快捷、能耗低及给药途径多等优势，已成为难溶性药物给药系统研究的新热点，拥有实际生产意义和广阔的应用前景。本论文立足于运用仿生结晶手段制备纳米药物新剂型，以提高其生物利用度为目的。选取吲哚美辛（INN）作为模型药物，聚乙烯吡咯烷酮（PVPK30）和聚乙烯亚胺（PEI600）为高分子辅料；采用反溶剂沉淀法 ...
黄域
core
Optimizing CuO on 3D Ordered Macroporous CeO2 for CO Oxidation in Rich Hydrogen
Rare Metals, EarlyView.ABSTRACT CO preferential oxidation (CO‐PROX) in rich H2 is considered a feasible strategy to solve CO poisoning for fuel cells, but obtaining good activity at low temperatures is still a challenge. Herein, three‐dimensional ordered macroporous (3DOM) CuO/CeO2 catalysts were fabricated by a templating approach, with the metal–support interaction (MSI ...
Xiaohua Chen +7 more
wiley +1 more source