Results 41 to 50 of about 44,854 (164)
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Precise control of chemical ordering in bimetallic nanocatalysts offers a route to decouple activity and selectivity in acetylene hydrogenation, but direct atomic‐scale evidence linking surface order to catalytic performance is scarce. Here, we tune Pd‐Cu nanoalloys from chemically disordered to highly ordered states by composition control and
Fan Xue +5 more
wiley +1 more source
Shuitu Baochi Xuebao, 2019 为探究烤烟适宜的水磷耦合模式及其对氮、磷、钾养分吸收积累的影响。采用田间小区试验，试验设置3种灌水水平和施磷水平，分别为低水（W1：0.50 L/株）、中水（W2：1.00 L/株）、高水（W3：2.00 L/株）和低磷（P1：32 kg/hm2）、中磷（P2：64 kg/hm2）、高磷（P3：96 kg/hm2），研究了不同施磷量和灌水量条件下烤烟对氮磷钾养分吸收积累的影响。结果表明：施磷量相同时，灌水处理能够明显增加烟株对氮、磷、钾养分的吸收积累量，表现为：W3Pi > W2Pi > W1Pi ...
汤宏 +6 more
doaj
Research on the Preparation and Properties of Iron-based Composites Used as Neutron Absorbing in Gray Control Rod [PDF]
, 2016 中国已从美国西屋公司引进、吸收和消化AP1000核电技术。为了形成自主知识产权的关键核电技术，本文对堆芯关键部件灰控制棒用中子吸收体材料进行了相关研究。基于前期对多种元素的核特性及燃耗分析获得了几种符合灰控制棒性能要求的候选元素，如Tm、Tb和Dy。本文采用粉末冶金方法(高能球磨、冷等静压与烧结)制备出了两种堆芯灰控制棒用中子吸收材料Fe-Tm2O3和Fe-TbFeO3-DyFeO3芯块。采用材料分析方法对球磨粉末、烧结块体进行了微观组织与微观化学分析与表征 ...
刘腾蛟
core
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Expanding near‐infrared (NIR) spectral response and utilizing ultraviolet (UV) photons are effective strategies for enhancing the power conversion efficiency (PCE) of lead halide perovskite solar cells (PSCs). However, the range of NIR spectral response extension and the utilization of UV light for devices are not enough, and the loss of ...
Li He +9 more
wiley +1 more source
Algebraic Representation of A Convex Optimization Problem [PDF]
, 2015 设𝑋,𝑌,𝑍为实线性空间,𝐴⊂𝑋为一非空凸集,并进一步假设𝑌,𝑍分别为楔 𝑃⊂𝑌,𝑄⊂𝑍所诱导的线性序空间.𝑆:𝐴→𝑌,𝑇:𝐴→𝑍为两个凸映射.称系统(1.1) 𝑆(𝑥)
孙小梅
core
A Multifunctional Reducing Molecular Dopant for 16% Efficient Tin Perovskite Solar Cells
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Although lead‐based photovoltaics have seen remarkable progress, tin‐based perovskite solar cells (Sn‐PSCs) continue to face challenges due to their limited power conversion efficiency and insufficient operational stability. The primary cause of this performance gap is the susceptibility of Sn2+ to oxidation, which promotes rapid defect ...
Xianyong Zhou +12 more
wiley +1 more source
Shuitu Baochi Xuebao, 2006 采用^15N-尿素进行盆栽和田间试验，研究了复合氮肥增效剂用量、尿素与复合氮肥增效剂配施对水稻生长、籽粒产量和氮素吸收利用的影响。结果表明，适宜用量（施氮量的20％）的复合氮肥增效剂能显著促进水稻幼苗生长发育；尿素全量配施复合氮肥增效剂不影响水稻生长，能显著提高水稻植株Ndff％、氮吸收总量，氮素利用率和^15N的吸收量,尿素减量5％～15％（即减少施氮7．8～23．7kg／hm^2）配施复合氮肥增效剂基本上不影响水稻生长、籽粒产量和吸氮总量，能显著提高氮素的农学效率、生理效率和氮素利用率；植株吸氮总量、
田秀英, 王正银
doaj +2 more sources
Dianci bileiqi, 2018 220 kV及以上线路常用防雷措施是安装避雷器,需要分析线路遭受雷击后避雷器能量吸收情况以达到合理防护效果。利用EMTP软件搭建220 kV输电线路模型,考虑杆塔接地装置冲击特性,比较线路发生雷击反击和绕击时避雷器的残压与通流,讨论改变杆塔接地装置尺寸、线路档距、线路工作电压相位角等因素对避雷器吸收能量的影响。分析结果表明:线路发生反击时,避雷器残压与通流波形振荡不如绕击时剧烈,吸收的能量也远低于绕击;反击时,避雷器吸收的能量随着接地棒长度的增加而降低,而绕击时,吸收的能量随着接地棒长度的增加而增大 ...
曹冰, 任全会, 肖扬
doaj
Optical Properties and Controlling Factors of Dissolved Organic Matter in the Basin of Northern South China Sea and the Adjacent Kuroshio Region [PDF]
, 2015 有色溶解有机物(CDOM)是海洋碳库的重要组成部分,在海洋真光层内发生的光化学、光生物学过程中扮演着重要的角色,同时也可用来示踪深海生物地球化学循环过程。南海是典型的大洋主控型边缘海,其北部海盆区通过吕宋海峡与邻近的西太平洋黑潮区进行着活跃的物质和能量交换,对整个南海及西太平洋碳的生物地球化学过程有着重要影响。但是,利用CDOM的光谱指纹特征来示踪两个海区碳循环过程的研究还未见报道。本文在搭建海水低浓度CDOM吸收光谱测试系统的基础上,结合三维荧光光谱测定与平行因子分析、主成分分析等手段 ...
王超
core
Rare Metals, Volume 45, Issue 3, March 2026.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