Results 31 to 40 of about 12,381 (169)
Performance of Pt-Based Catalysts for Dimethyl Ether Catalytic Combustion [PDF]
, 2017 利用二甲醚催化燃烧作为二甲醚重整制氢的热源可有效简化系统和提高效率，通过对比不同载体、不同Pt负载量以及不同助剂对Pt催化剂的性能影响，筛选出了最适合二甲醚低温起燃催化燃烧的催化剂.研究发现，HZSM-5型分子筛作为二甲醚催化燃烧载体具有较好的起燃特性，同时加入助剂Ce可以显著提高催化剂活性，起燃温度相对Pt/HZSM-5降低了58℃.Pt-Ce/HZSM-5催化剂的二甲醚起燃特性实验表明，在过量空气系数为1.1时具有最佳的起燃特性.对Pt-Ce/HZSM-5催化剂进行了稳定性实验 ...
伊立其 +4 more
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Experimental methods for wind tunnel studies of seed dispersal by wind
Applications in Plant Sciences, Volume 14, Issue 1, January-February 2026.Abstract The complexity and variability of natural environments make quantitative studies of seed wind dispersal challenging. Wind tunnel experiments offer a controlled alternative to investigate the mechanisms of seed wind dispersal. This review focuses on wind tunnels and the associated technologies used for studying seed wind dispersal, including ...
Liang Tian +5 more
wiley +1 more source
The study of brain function changes and related molecular mechanism of rat with chronic obstructive pulmonary disease [PDF]
, 2015 目的 慢性阻塞性肺病（chronicobstructivepulmonarydisease，COPD）以不完全可逆的气流受限和全身系统炎症为特征，可造成脑部供氧不足和神经炎症，导致脑细胞损伤。本研究利用分子生物学等方法探究COPD大鼠脑损伤的分子机制，并为快速诊断出COPD和临床治疗提供依据。 材料和方法 材料：雄性SD大鼠由厦门大学实验动物中心提供，体重230-280g，随机分成4组，健康对照组，吸烟组，脂多糖组，吸烟+脂多糖组，饲养在相同环境下，给予充足的水和食物。 研究方法 ...
严亚
core
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Low conductivity and poor oxygen reduction reaction (ORR) catalytic activity limit the bifunctional catalytic performance of layered double hydroxide (LDH) in zinc–air batteries. In this work, an efficient bifunctional electrocatalyst was prepared by loading nitrogen and phosphorus co‐doped carbon quantum dots (NPCQDs) onto a cationic‐vacancy ...
Wenhao Tang +4 more
wiley +1 more source
Dianci bileiqi, 2017 为了解决架空输电线路的雷击问题,研制了一种对建弧率有强烈抑制效果的爆炸强气流灭弧防雷间隙装置,使雷电流通过闪络路径流入大地,同时喷射出大量高压、高速电负性气体迅速熄灭工频续流电弧。建立了爆炸强气流耦合工频电弧的数学模型,运用有限元分析软件AUTODYN分别对爆炸气流场和耦合气流场进行仿真。进行了爆炸强气流截断工频续流电弧试验,并借助摄像机和示波器模拟记录输电线路雷击时灭弧防雷间隙中工频续流电弧的发展变化情况。试验结果表明,爆炸强气流灭弧防雷间隙能在0.4 ms内完全熄灭电弧并抑制重燃。
李世荣 +5 more
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Analysis and Evaluation of Two-dimensional Hypersonic Inlet System Drag [PDF]
, 2015 进气道作为超燃冲压发动机的主要部件，其阻力特性对进气道优化选型、气动减阻、一体化设计等方面都具有重要影响。在高超声速试验中，阻力的直接测量相当困难，测量误差可达到50%以上，因此有必要采用间接方法来研究进气道的阻力特性。目前，学者们采用的阻力估算方法或多或少都存在一些缺陷，无法快速应用于高超声速进气道内部阻力的工程估算。 本文提出一种快速估算进气道阻力的方法，从进气道内控制体的动量定理出发，推导出进气道阻力特性的工程估算公式；重点研究了估算公式的数据处理形式，并分别用理论分析 ...
安平
core
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Developing efficient catalytic thermal desorption systems is of great significance in the field of sustainable soil remediation. Herein, novel Mn–Ce solid solution modified Co3O4 nanocrystals were successfully prepared for the removal of perfluorooctanoic acid (PFOA) in soil.
Yu‐Hao Liu +8 more
wiley +1 more source
Flame Characteristics and Burning Rate of Typical Solid Fuel Under Reduced Gravity [PDF]
, 2011 利用实验时间为2.2 s，低重力水平为l0-2 90简易实验系统，对易升华典型固体燃料试样从常重力到低重力环境过渡的瞬态燃烧过程进行了实验研究，考察了火焰形态、火焰亮度和温度以及燃料试样燃烧速率受重力水平影响的变化趋势，结果表明，随着重力水平的变化，火焰从常重力环境中的湍流扩散火焰，过渡为低重力环境中的层流火焰，火焰高度、亮度和温度以及燃烧速率都随重力水平的下降而降低．由于进入低重力状态后，常重力燃烧诱导的空气流动并没有完全消失，观察到了逆风侧火焰温度、火焰平均亮度，以及燃烧速率因气流作用而回升的现象 ...
张小乐 +4 more
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Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT The design of nanoparticles confined in hollow N‐doped carbon structures is crucial for improving the oxygen reduction reaction (ORR) kinetics, yet achieving this remains a significant challenge. In this work, hollow porous nitrogen‐doped carbon encapsulated FeP/Fe2P (H‐FeP/Fe2P) were successfully constructed via a templating method combined ...
Li‐Xia Wang +8 more
wiley +1 more source
A study on peracetic acid used for disinfection of clean laminar air flow ward
Huli yanjiu, 2004 为观察过氧乙酸用于空气层流洁净病房空气消毒的效果 ,用 1g/m3 、2 g/m3 的过氧乙酸对空气层流洁净病房进行空气消毒。结果 :2 g/m3 过氧乙酸自然挥发熏蒸法进行空气层流洁净病房的消毒效果符合要求。提示 2 g/m3 ...
李芳, 谭瑞珠, 林婷, 王晓珍
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