Results 11 to 20 of about 12,381 (169)
Dynamic Behaviors of Water Droplets on H2/Air PEMFC Gas Diffusion Layer Surface: VOF Simulations [PDF]
, 2017 在研发和设计H2/空气质子交换膜燃料电池时，如何促进扩散介质及气流通道内液态水的传输是需要考虑的主要问题之一.本文运用FLUENT软件流体体积(VOF)模块模拟了燃料电池气体扩散层表面液滴的形成、脱落及输运行为.液滴受气体剪切力、粘滞力和表面张力的共同影响，对不同的壁面浸润角和不同的气体剪切力，呈现出复杂的液滴动力学行为.考察了通道气体流速和扩散层表面浸润力对液滴行为的影响.结果表明，增大扩散层表面浸润角或入口气流速度均可以促进扩散层表面液滴的跃离，前者对液滴跃离的促进作用更大 ...
蒋方明, 陈旺
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Study of the pitch change of carbon coils during their growth [PDF]
, 2012 In the present paper, carbon coils (CCs) were prepared by CVD. Their morphology, particularly pitch changes of the carbon coils prepared in different conditions were observed.
Dupré, L. +5 more
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Study of the Dump Diffuser Optimization for Gas Turbine Combustors [PDF]
, 2015 扩压器作为连接高压压气机和燃烧室进口的关键部件，能够增压减速、降低流动损失，使燃烧稳定，提高发动机效率。 本文采用实验和数值模拟结合的方法对突扩扩压器进行了深入的研究，利用水槽PIV设备，采集扩压器内部的速度场信息与不同计算模型的计算结果对比，确定最佳的计算模型，确定出雷诺应力模型预测的扩压器流场信息与实验数据吻合的最佳；通过改变前置扩压器扩张角、突扩间隙等几何参数，研究了几何参数对扩压器性能的影响，并提出了计算总压损失和静压恢复的经验公式，利用该公式可以计算最佳扩张角、前置扩压器是否存在分离等重要信息。
徐磊磊
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Overreliance on Orthographic Similarity in L2‐Japanese Conceptual Processing by L1‐Chinese Learners
International Journal of Applied Linguistics, EarlyView.ABSTRACT Orthographic and phonological similarities between first (L1) and second (L2) languages can facilitate L2 processing. Particularly, L1‐Chinese learners of L2‐Japanese can benefit from the shared morphosyllabic Chinese characters (Japanese kanji/Chinese hanzi) because of their similar orthographies.
Xuehan Zhao, Kexin Xiong, Sachiko Kiyama
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利用模仿法训练坤甸国立第三高中理科二年级学生 的Z、c、s和zh、ch、sh的发音技能 [PDF]
, 2017 摘要 语音教学是外语教学基础之一，包括汉语。训练印尼学生学习汉语语音十分重要。印尼学生对一些汉语语音不熟悉，例如z、c、s和zh、ch、sh的音。笔者针对 坤甸国立第三高中理科二年级的学生进行了《利用模仿法训练坤甸国立第三高中理科二年级学生的z、c、s和zh、ch、sh的发音技能》的研究。通过三次教学 实验之后，笔者给学生做了研究。结果显示学生对z、c、s和zh、ch、sh的发音技能有所提高。笔者得出的后测结果是学生对z、c、s和zh、ch、sh的发音技能大部分已经达到50%以上。因此 ...
Mulya, K. (Kiki)
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Piezocatalytic technology utilizes mechanical strain or stress‐induced piezoelectric phenomena to produce robust internal electric fields, markedly improving the separation efficiency of e−‐h+ pairs. This method has emerged as a focal point in catalysis by removing reliance on conventional light or electrical energy via its mechanical‐to ...
Yue Zhou +5 more
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Role of Examinations on Phonatory Airflow and Breathing Airflow in Voice Function Assessment [PDF]
, 2015 第一部分s/z比值在嗓音功能评估中的意义 目的：测量正常嗓音组和声带良性增生性疾病组的s/z比值，确定正常嗓音组的s/z比值范围，比较正常嗓音组和声带疾病组的s/z比值有无显著差异，探讨s/z比值对提示诊断声带疾方法：实验对象为正常对照组58例（男：36例，女：22例），疾病组48例（男：23例，女性：25例）。嘱实验对象先深吸气，呼气起始发/s/音（音强控制在65dB左右）至呼气结束停止发音,同一受试者音强大小变化不超过2dB。检查者记录发声时间。同样的方法测量发/z/的时间 ...
潘晗
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Skin wound injuries are often accompanied by bacterial infections and severe inflammation. Especially, M1‐type macrophages at the wound site can trigger a cascade of inflammatory responses, mediating a vicious cycle of inflammation. Meanwhile, hypoxia further exacerbates vascular damage and constriction in the wound microenvironment, thereby ...
Xianfeng Wang +6 more
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, 1982 本文给出钝头细长锥无粘、平衡和非平衡高超声速绕流流场的数值分析。对存在化学反应的空气,考虑了13种气体组分和22个化学反应,包括N_2、O_2和NO的振动松弛与离介过程之间的耦合反应。头部亚-跨声速区和后身高超声速区分别用直线法和有限差分法进行计算。在来流条件M_∞=20～26,Re_∞=(p_∞u_∞α)/μ_∞=1.5×10~3～5.5×10~6(α为头部半径)的参数范围内,给出了绕流流场和等离子体鞘层诸特性,如激波形状 ...
周正瑾, 马文驹, 高智
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Two‐dimensional (2D) nonlayered niobium nitrides have attracted considerable interest for electrochemical energy storage. However, the synthesis of these materials is hampered by their nonlayered crystal structures, which are characterized by strong three‐dimensional chemical bonding.
Rui Huo +7 more
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