Secondly, the diffusion of bank cards is influenced by the external and internal factors, and the S-shaped logistic curve indicates the characteristics of the bank cards' diffusion.
第二，银行卡在银行业的扩散受到外生因素和内生因素的影响，反映银行卡扩散特点的逻辑曲线呈现S型；
The effect of concentration profile of key components in catalysts and temperature on internal diffusion efficiency factors were also discussed.
讨论了催化剂内部关键组分的摩尔分数分布情况及温度对内扩散效率因子的影响。
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