20 resultados para 151-911C


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A kinetic model has been developed for the prediction of the concentration gelds in an rf plasma reactor. A sample calculation for a SiCl4/H2 system is then performed. The model considers the mixing processes along with the kinetics of seven reactions involving the decomposition of these reactants. The results obtained are compared to those assuming chemical equilibrium. The predictions indicate that an equilibrium assumption will result in lower predicted temperature fields in the reactor. Furthermore, for the chemical system considered here, while differences exist between the concentration fields obtained by the two models, the differences are not substantial.

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1概况 第57届国际宇航大会于2006年10月2—6日在西班牙瓦兰西亚召开,10月1日还召开了国际宇航科学院院士会和国际宇航学会各委员会会议.会议参加人数超过2000人,开幕式大礼堂座无虚席.这次会议的主题是“开创更贴近人民的空间事业(bringing space closer to people)”.大会在瓦兰西亚的大展览馆召开,群众与代表交混.除大会会场外,所有分会会场都是用木板临时安装的,会场条件简单.

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通过 3种密度硬质聚氨酯泡沫塑料的拉伸实验 ,研究了它们的应力 -应变特性及其应变率效应。同时 ,为确定泡沫塑料拉伸失效机理 ,对材料进行了扫描电镜下的细观拉伸实验 ,观察了试件表面胞体的变形与失效过程 ,再结合宏观拉伸试件断口的扫描电镜分析 ,进一步讨论了泡沫塑料在拉伸加载下的失效机理。基于泡沫塑料的拉伸应力 -应变曲线 ,用数值方法拟合了泡沫塑料的拉伸本构关系。

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