Results 21 to 30 of about 7,964 (114)
ABSTRACT With high theoretical capacity and low cost, bismuth sulfide (Bi2S3) demonstrates considerable potential as an anode for sodium/potassium‐ion batteries (SIBs/PIBs). Unfortunately, significant volume variation, low electrical conductivity, and dissolution of polysulfides drastically weaken their intrinsic merits.
Fuyu Xiao +11 more
wiley +1 more source
为了揭示喀斯特林下经济活动中人为踩踏对土壤入渗特性的影响规律,以喀斯特山地森林内部(未受干扰区域)、森林小径中央、森林小径边缘和裸地为试验样地,基于盘式入渗试验测定不同负压水头下(-0.5,-3,-6,-9 cm)的非饱和导水率(K9、K6、K3、K0.5)、饱和导水率KS、Gardner α常数和水流贡献率。通过原位染色示踪试验分别估算各样地的剖面染色面积比(DC)、均匀渗透深度(UniFr)和优先流百分比(PF-fr),分析了人为踩踏对喀斯特森林土壤优先流特征的影响。结果表明,森林小径中央的KS ...
李瑶, 刘冬冬, 车陆禄
doaj
Atomically Thin Sn:GaN‐GaN Homojunction for High‐Sensitivity β‐Ray Detection
ABSTRACT Gallium nitride (GaN), a third‐generation wide‐bandgap semiconductor renowned for its superior radiation tolerance, holds promise for advanced β‐ray detection. Herein, a scalable liquid metal‐assisted in situ synthesis method is presented to fabricate Sn‐doped GaN homojunctions via gallium oxide printing followed by ammonolysis, enabling ...
Weiqing Liu +8 more
wiley +1 more source
为了探明盐分在低路基公路边坡土壤中的运移方式,以鹤大高速公路(G11)低路基段边坡土壤为研究对象,引入优先流,来探讨盐分随土壤水分运动的过程。采用亮蓝染色示踪和图像解析方法,分析土壤剖面优先路径水平和垂直分布特征。结果显示:染色区和非染色区的土壤性质存在显著差异,染色区土壤存在较多的孔隙。在水平剖面上,相同影响半径优先路径数量随着土层深度的增加而减少,同一土层中1.0~10.0 mm影响半径的优先路径数量要远远多于>10.0 mm影响半径的优先路径数量。在垂直剖面上,优先流特征指标染色覆盖率(DC ...
张东旭 +4 more
doaj
为探究围封对灌丛草地土壤优先流的影响,以宁夏吴忠市盐池县典型荒漠草原区为研究区,通过野外入渗染色试验、图像处理分析等方法,对围封荒漠草原灌丛草地土壤优先流的影响进行评价。结果表明:(1)围栏封育与放牧管理样地土壤水分入渗特征存在差异,在围栏封育样地,草地、天然柠条林地、人工柠条林地的入渗染色图像分别在0—125,0—115,0—105 cm呈现均匀分布,而在125—240,115—150,105—140 cm呈现染色分支,在放牧管理样地,草地、天然柠条林地、人工柠条林地入渗染色图像分别在0—80,0 ...
徐苗苗 +6 more
doaj
混合式高压直流断路器分断速度快且通态损耗低,能够保证不闭锁换流站的情况下实现线路故障的快速隔离,减小故障范围,是直流电网保护的关键设备之一。首先研究了含混合式直流断路器的柔直系统直流故障限流机理,分析影响直流故障电流峰值以及故障电流持续时间的关键因素,并在现有混合式高压直流断路器基础上,提出一种快速限流的优化技术方案,在转移支路加入故障限流子模块(fault current limiter submodule, FCL_SM),FCL_SM由二极管桥、限流电阻以及限压电路组成 ...
夏克鹏 +5 more
doaj +1 more source
ABSTRACT Semiconductor photocatalysis represents a pivotal frontier in the quest for sustainable energy and environmental remediation. Among the diverse catalytic materials, Bismuth Oxychloride (BiOCl) has emerged as a particularly promising candidate due to its unique layered structure, featuring [Bi2O2]2+ layers intertwined with halogen ions, which ...
Liu Han +5 more
wiley +1 more source
Structural Modulation of Magnetic Softness in Fe‐Based Amorphous Alloys via Pulse Current Training
ABSTRACT Fe‐based amorphous alloys, despite their intrinsically low magnetocrystalline anisotropy, suffer from quasi‐dislocation dipoles and localized stress fields that impede domain‐wall motion and increase coercivity. Here, we introduce pulse current training (PCT) as an energy‐efficient technique to overcome these limitations in a Fe76Si9B10P5 ...
Shumin Ye +13 more
wiley +1 more source
通过野外染色示踪试验结合室内图像解析技术,对北京地区2种类型土壤(淋溶褐土和潮土)进行了优先流染色形态特征及其影响因素研究。结果表明:(1)样地土壤用浓度为4 g/L的亮蓝溶液27.3 L染色后,淋溶褐土基质流深度均值为7.72 cm,潮土为8.56 cm,潮土优先流发生相对滞后;(2)淋溶褐土的优先流比、染色面积比、最大染色深度和长度指数均大于潮土,优先流现象更明显;(3)淋溶褐土优先路径集中区较多,侧向流较发达,且染色面积比和土壤深度相关性大于潮土,两者关系更密切;(4 ...
郑欣 +5 more
doaj
When Public Health Becomes the Weapon: Current and Prospective Consequences of the Genocide in Gaza
ABSTRACT Catastrophic humanitarian conditions during the 2023–2025 genocide in Gaza have caused a public health crisis of exceptional magnitude. This article summarizes key short‐ and long‐term health consequences for Gaza's civilian population and outlines priorities for recovery.
Therese Alexandra Evald +19 more
wiley +1 more source

