Results 21 to 30 of about 44,854 (164)

Multi‐Dimensional Characterization of Sodium‐Ion Battery Materials: Bridging Atomic Structure, Interface Chemistry and Electrochemical Performance

open access: yesRare 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

超高产春玉米氮磷钾的吸收与分配

open access: yesShuitu Baochi Xuebao, 2008
采用田间试验的方法,在供试玉米产量15 435 kg/hm2的超高产水平下,对春玉米氮、磷、钾吸收、分配与转移规律进行了系统研究。结果表明:在灌浆期前,超高产春玉米对氮、磷、钾养分吸收规律变化较为相似,即阶段吸收量和日均吸收量随生育时期的推进逐渐增大;而灌浆期后,植株对氮、磷、钾养分吸收趋势出现显著差异,即氮、磷吸收持续增高,钾吸收迅速下降。养分在各器官体内的分配特点体现在氮、磷分配随生长中心的转移而发生变化,而钾向生长中心的转移变化不明显。
曹国军   +5 more
doaj  

Rates and Influence Factors of Water Nitrification and Inorganic Nitrogen Uptake in Pearl River Estuary [PDF]

open access: yes, 2016
氮是海洋初级生产力的主要限制因素之一,海洋氮循环过程与碳、磷等其它生源要素的循环紧密联系,影响有机物输出,调控海洋生物泵效率和大气二氧化碳水平,在海洋生物地球化学循环过程中扮演极其重要的角色。硝化作用和浮游植物吸收是氮循环中的重要过程,大量人为来源活性氮的排放对河口和近海的生物地球化学过程产生了显著影响,并影响了氮营养盐内部转化过程。本研究于2015年7月间,对珠江口的11个站位进行了调查,覆盖了珠江口淡水区域、咸淡水混合区和冲淡水区。 本研究首次应用氮稳定同位素示踪技术 ...
张骁
core  

Manipulating Terminal Bonds of Ti3C2Tx MXene for Highly Efficient Microwave Absorption and Photothermal Conversion

open access: yesRare Metals, Volume 45, Issue 4, April 2026.
ABSTRACT MXenes have been widely investigated as microwave absorption (MA) materials because of their unique properties. This study introduces a terminal bond manipulation strategy to enhance charge transfer and polarization in Ti3C2Tx, optimizing its MA performance.
Xiang Fang   +8 more
wiley   +1 more source

Cs2SnI6: A Perovskite‐Based Electromagnetic Wave Absorbing Material

open access: yesRare Metals, Volume 45, Issue 4, April 2026.
ABSTRACT Lead halide perovskites and carbon‐based materials are interesting, high‐performing electromagnetic wave absorbing materials. However, only a few studies have been carried out to examine in detail the electromagnetic wave absorption properties of these materials.
Fei Han   +11 more
wiley   +1 more source

高压组合电器中SF6分解产物SO2F2红外吸收特性及其检测传感装置研究

open access: yesGaoya dianqi, 2021
特高压硫酰氟(SO2F2)气体作为气体绝缘全封闭组合电器(GIS)气室中六氟化硫(SF6)分解产物的特征组分,对其进行检测分析可实现GIS设备的早期潜伏性故障识别。搭建光程池温度、压强可调的傅里叶变换红外吸收光谱仪(FTIR)系统,利用FTIR实验及HITRAN数据库得到的吸收谱线参数,对SO2F2气体的红外吸收谱线及其交叉干扰特性进行分析,选取中心波长2 763 cm-1位置作为SO2F2气体的特征吸收峰,并对SO2F2在该波段位置附近受温度和压强影响的红外吸收特性进行研究。结果表明 ...
张施令   +5 more
doaj  

Preparation of Indium Tin Oxide Nanopowders and Study of their Surface Plasmon Resonances and Applications as Heat Isolation Materials [PDF]

open access: yes, 2015
氧化铟锡(ITO)具有优异的高电导和高可见光透光率性质,已广泛应用于透明导电氧化物(TCO)薄膜材料。有关ITO材料的研究,大多集中于其高载流子浓度导致的高电导性质。虽然ITO纳米粉体由于其高载流子浓度,因此具有高的近红外吸收特性,作为热阻隔材料有应用潜力,但,ITO热阻隔材料的相关研究,主要是成膜工艺、膜层性能等方面;而对于关键的基础问题,即,ITO纳米粉体材料的基础问题,尤其是等离子共振(SPR)吸收特性方面的研究尚缺。等离子共振吸收的影响因素,理论上虽然给出了指导,但,针对ITO纳米粉体 ...
脱永峰
core  

Synergistic Electron Density and Oxygen Defect Regulation in Fluorite High‐Entropy Oxides for Superior Ionizing Radiation Shielding

open access: yesRare Metals, Volume 45, Issue 4, April 2026.
ABSTRACT Lightweight and lead‐free radiation shielding materials remain urgently needed. This work designed a fluorite high‐entropy oxide (FHEO) system through a combined computational–experimental route. Density functional theory based on special quasi‐random structures was used to identify thermodynamically stable fluorites from a wide compositional ...
Xiangjie Duan   +9 more
wiley   +1 more source

用32P示踪法研究昆明市水土流失的规律

open access: yesShuitu Baochi Xuebao, 2002
应用32P研究山地水土在不同时间、坡度、方向、深度、距离的吸收和分布规律。结果表明:1g山地土壤对32P的吸收随着深度、距离的增加而减小。土壤对32P的吸收率的最大距离为3470.7969×10-5%,最小为1.2097×10-5%;最大深度为2407.9855×10-5%,最小为0.4752×10-5%。在坡度上,磷的吸收率呈波形变化,即在15°~30°,50°~80°时随坡度的增加而减小,在30°~40°时无明显变化,在40°~50°时随坡度的增加而增加。32P的吸收率与距离、坡度、方向呈显著负相关。
强继业 李佛琳 许丽仙
doaj  

Improvement of Administration Penal Code Legislation in Regulating P2P Lending [PDF]

open access: yes, 2016
P2P网贷是近几年来我国民间金融行业出现的一种新型借贷模式,而且发展非常迅速。其倚靠于当下互联网技术的便捷快速的特性,为目前我国中小企业融资和普通消费者借贷提供了极大的便利。然而,其发展过程中存在的问题也一直受人诟病。这种网络借贷模式的风险性在近几年的发展中暴露无遗,现实中接连出现的P2P平台跑路事件折射出了当前这类平台存在的严重问题。而监管上的滞后也导致这个行业的发展一度失去了正确方向。在我们不断加深对P2P网贷认识的同时,根据其发展现状合理的制定发展计划和法律监管措施显得尤为重要 ...
李波
core  

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