Results 61 to 70 of about 1,246,898 (167)
Gongye shui chuli, 2012 印染废水成分复杂,可生化降解性差。采用Fe-PbO2/不锈钢为阳极,不锈钢为阴极,活性炭为颗粒电极,电催化氧化处理上海某印染厂废水。当pH为3,电流密度为0.028 A/cm2,硫酸铝浓度为0.16 mol/L,极板距离为6 cm,电解时间为10 min时CODCr去除率达到71.1%,BOD5/CODCr由处理前的0.126上升为0.34,可生化降解性明显提高。Fe-PbO2/不锈钢阳极和不锈钢阳极在印染废水中的循环伏安曲线表明镀PbO2层的不锈钢电极具有较好的催化活性。
张大全, 高立新, 杨文莲
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Dianci bileiqi, 2018 针对氧化锌压敏电阻直流作用下的老化问题。利用氧化锌压敏电阻肖特基势垒理论,对氧化锌压敏电阻在正极性和正、负极性直流交替作用下,氧化锌压敏电阻老化规律进行研究,得出以下结论:1)氧化锌压敏电阻在单一极性直流作用下,产生明显的极性效应。此外,极性效应和老化程度均随电流的增加而增大,当达到最高点时,出现减慢的现象。2)正、负极性电流交替作用时,ZnO压敏电阻出现极性补偿现象,使得肖特基势垒高度下降变慢,导致压敏电阻老化程度较单一极性电流作用下缓慢。
苑吉河 +4 more
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Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Sodium‐ion batteries (SIBs) offer a promising, cost‐effective alternative for large‐scale energy storage due to the abundance of sodium. However, their practical deployment is challenged by sluggish interfacial kinetics and unstable interphase formation, which severely limit performance across wide temperature ranges. Here, we demonstrate that
Mingxing Zhang +10 more
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World Affairs, Volume 189, Issue 4, Winter 2026.ABSTRACT The move from unipolarity to a fluid and contested multipolar world order has significantly changed the way African nations form national security policy due to changes in the nature of the strategic environment of those states. Much of the literature has focused on how the actions of major world powers ‐ the United States, China and Russia ...
Chick Edmond +2 more
wiley +1 more source
, 2014 本发明涉及一种有序化气体扩散电极及其制备和应用，所述膜电极由气体扩散层和催化层组成，所述催化层为有序化催化层，其由于气体扩散层表面有序化阵列排布的导电聚合物纳米线及掺杂于导电聚合物纳米线表面的邻苯二甲酸二乙二醇二丙烯酸酯（PDDA）与Pt催化剂粒子相互作用而组成。本发明所述有序化膜电极具有贵金属Pt利用率高、稳定性高等优点，可有效降低燃料电池催化剂成本，提高燃料电池寿命；同时，本发明所述膜电极可有效增强燃料在催化层中的传质，从而提高燃料的利用率；本发明所述有序化膜电极可作为质子交换膜燃料电池 ...
孙公权 +3 more
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Estimating the total mortality of seabirds following a marine heat wave
Conservation Biology, Volume 40, Issue 5, October 2026.Abstract Marine heat waves detrimentally affect a range of marine species, including seabirds, and are increasing in frequency and severity. When thousands of dead seabirds wash up on beaches, the public becomes concerned. However, the number of dead birds recorded on beaches is only a fraction of the total mortality; most birds perish at sea.
Jennifer L. Lavers +3 more
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, 2009 本发明涉及固体氧化物燃料电池，具体说是一种过渡元素钛或钪掺杂的LSM(锰酸锶镧)阴极材料及其应用。该阴极材料组成为 (La1-xSrx)1-yMn1-zMz O3±δ，(0＜x＜1，0＜y＜1，0＜z≤1，-1＜δ＜1)，M为钛元素或钪元素。按质量百分比计，固体氧化物燃料电池阴极由1-100％上述阴极材料和0-99％电解质材料组成；所述电解质材料为5-20mol％Y2O3稳定的 ZrO2、5-20mol％Sc2O3稳定的ZrO2、SmxCe1-xO2、GdxCe1-xO2、YxCe1-xO2 ...
刘 斌 +4 more
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Habitat and spatial trends of U.K. wintering waterbird populations over 50 years
Conservation Biology, Volume 40, Issue 5, October 2026.Abstract The United Kingdom is an important wintering ground for millions of waterbirds. Most U.K. wintering waterbird populations increased between 1970 and the mid‐1990s, but declined thereafter. We examined U.K. population indices in 46 wintering waterbird species in two 25‐year periods, 1970–1994 and 1995–2019, to identify which waterbird groups ...
Blaise Martay +8 more
wiley +1 more source
, 2008 电极与双极板是全钒液流储能电池 (VRB) 的重要部件。电极是电解液传递和发生电化学反应的场所；双极板起到分隔正、负极电解液，连接单电池并集流的作用。设计、开发结构合理、价格低廉、性能优异的电极与双极板对全钒液流储能电池的性能提升、成本控制及商业化推广具有重要意义。 本论文综合考虑了电极与双极板的成本、结构、性能等因素，对不同种类的电极和双极板材料进行了研究、对比、筛选、优化和改性。采用了电化学阳极氧化法对石墨毡电极进行了氧化处理，在其表面引入了含氧官能团 ...
钱鹏
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Gaoya dianqi, 2017 为将极化去极化电流法（PDC）应用于实际运行中变压器油纸绝缘的状态评估,笔者在实验室搭建了油纸绝缘PDC测试试验平台,测试了不同老化程度不同水分含量油浸纸样品的PDC特性曲线,并对测试结果进行对比分析。分析结果表明:在测试时间范围内,老化程度对油浸纸极化电流曲线的前段和中段以及去极化电流曲线的整个测试阶段产生影响;水分含量对油浸纸极化电流曲线的整个测试阶段以及去极化电流曲线中末段产生影响。提出以初始去极化电流idp1作为油浸纸聚合度的映射特征量,稳态极化电流id（电导电流）作为水分含量的映射特征量 ...
黎成林 +5 more
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