The effects of temperature, the ratio of ammonia, the ratio of air and the space velocity of catalyst upon the conversion, molar yield and selectivity of the reaction were observed, respectively.
考察了反应温度、氨比、空气比和空速对反应的转化率，摩尔收率和选择性的影响。
The low selectivity of masking materials is one of the restrictions on fabrication process of high aspect ratio of micro-structures.
掩蔽层材料选择比低是硅高深宽比微结构实现的限制之一。
The effects of mole ratio of reactants, selectivity and quantity of catalyst and reaction time on the conversion rate have been studied.
并对原料配比、反应时间、 催化剂的选择及用量对转化率的影响进行了讨论。
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