Results 21 to 30 of about 14,547 (112)
Rare Metals, EarlyView.ABSTRACT The development of highly efficient and stable nonprecious metal electrocatalysts for the acidic oxygen evolution reaction (OER) is crucial to advance proton exchange membrane (PEM) water electrolysis. In this work, a dual synergistic strategy was proposed by constructing a Ce‐modified MnO2/MnO heterostructure.
Chuanbin Li +7 more
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Shuitu Baochi Xuebao, 2016 采用野外实地观测与室内浸水法，对白龙江上游5种典型灌丛林（荚蒾、甘肃柳、中华柳、箭竹、绣线菊）林地枯落物的蓄积量、持水量、持水率和吸水速率进行了研究。结果表明：5种典型灌丛林林地枯落物蓄积量大小依次为箭竹林＞甘肃柳林＞荚蒾林＞中华柳林＞绣线菊林。5种灌丛类型枯落物半分解层的持水量均高于未分解层，中华柳未分解层持水量最高，箭竹半分解层持水量最高，绣线菊未分解层和半分解层持水量都是最小，整个枯落层最大持水量大小为中华柳＞箭竹＞荚蒾＞甘肃柳＞绣线菊 ...
齐 瑞 +6 more
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Rare Metals, EarlyView.ABSTRACT Narrowband near‐infrared (NIR) phosphor‐converted light‐emitting diodes (pc‐LEDs) featuring low full‐width at half maximum (FWHM) and high conversion efficiency are crucial for chemical content evaluation, light therapy, and bioimaging.
Chunshen Li +4 more
wiley +1 more source
Shuitu Baochi Xuebao, 2019 针对花岗岩发育的崩岗土体崩壁失稳等问题，通过单轴抗拉试验，研究了湖北通城地区不同初始含水率的崩岗土体抗拉强度特性。结果表明：初始含水率对崩岗土壤抗拉强度影响明显。土壤抗拉强度特征曲线为单峰型，表土层、红土层和红砂过渡层抗拉特征曲线在含水率WC（24.4%）附近出现抗拉强度峰值，而砂土层在WC（25.8%）出现抗拉强度峰值。崩岗不同层次土壤轴向拉伸长和径向收缩长随初始含水率呈现正相关关系，且土壤轴向拉伸率和径向收缩率与初始含水率拟合出相关系数较高的线性函数关系 ...
冯延云 +3 more
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Rare Metals, EarlyView.ABSTRACT Recently, cobalt/nitrogen co‐doped materials have emerged as heterogeneous catalysts to activate peroxymonosulfate (PMS) and have been applied to advanced oxidation processes for environmental remediation. However, their recyclability and reusability remain major barriers to practical application.
Wen‐Kai Zhu +11 more
wiley +1 more source
Rare Metals, EarlyView.ABSTRACT Photocatalytic hydrogen production from water splitting is a promising strategy for sustainable and clean energy generation. However, the design of low‐cost, highly active photocatalysts remains a critical challenge. In this study, covalent organic frameworks (COFs) were loaded onto the surface of Cd0.9Cu0.1S to fabricate COF/Cd0.9Cu0.1S ...
Yue Zhao +3 more
wiley +1 more source
Shuitu Baochi Xuebao, 2005 通过对金沙江干热河谷新银合欢人工林内枯落物层持水特性的试验研究,总结出林内枯落物层的持水特性。结果表明,新银合欢林内枯落物全年凋落总量为7.03 t/hm2,月平均为0.59 t/hm2,枯落物层的厚度为2.14.5cm,其中12月凋落最盛。枯落物的自然含水量月平均为25.27%,最大月出现在8月,与该区域的降水有较好的拟合关系,但存在滞后效应。持水速率在0.5 h内迅速增大,在浸泡48 h后基本达到最大值,在0.5 h内林内枯落物可以吸收1.2 mm的降水,当降水<11.72 ...
方海东 纪中华 杨艳鲜 拜得珍 廖承飞
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Shuitu Baochi Xuebao, 2019 为了研究滨海沙地沿海防护林凋落物水源涵养功能，采用野外调查和室内浸泡相结合，对滨海沙地4种典型人工林（木麻黄林、湿地松林、尾巨桉林和纹荚相思林）不同分解阶段的凋落物现存量、持水率、持水量和吸水速率进行研究。结果表明：相同林龄的4种人工林凋落物现存量表现为木麻黄林（19.12 t/hm2） > 湿地松林（17.51 t/hm2） > 尾巨桉林（10.90 t/hm2） > 纹荚相思林（10.13 t/hm2），半分解层凋落物储量占比高于未分解层）4种人工林最大持水率在140.55%~206.47 ...
孟庆权 +5 more
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Conservation Biology, EarlyView.Abstract Measuring area‐based conservation outcomes in tropical forests is challenging due to cryptic human disturbances (e.g., hunting). As a result, comparative studies of management strategies providing quantitative outcomes remain scarce, especially in the Neotropics.
Lucy Perera‐Romero +5 more
wiley +1 more source
Shuitu Baochi Xuebao, 2023 以北京市密云板栗林为研究对象,设置植物措施、工程措施和植物+工程措施处理(裸地作为对照)分析不同水土保持单一措施及其组合措施对坡面产流产沙及水沙关系的影响,以期为密云区板栗林水土保持措施的制定提供科学依据。结果表明:植物措施方面,卷柏处理的减流率和减沙率分别为62.8%,88.3%,减流减沙效果优于椰丝毯、狗牙根和结缕草处理;工程措施方面,水平阶处理的减流率和减沙率分别为83.2%,92.9%,减流减沙效果优于鱼鳞坑处理;组合措施方面,水平阶+卷柏处理的减流率和减沙率分别为86.7%,96.1 ...
张萌, 关红杰, 王若水, 张超
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