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；
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.
文献增长大致符合文献增长的逻辑曲线，可分为奠基期（1986—1994）、增长期（1995—2002）、稳定期（2003—2009）。
The growth of literature approximately fit the logistic curve, which could be classified into basic stage(1986—1994), growth stage(1995—2002) and stable stage(2003—2009).
通过对燃气轮机增压站压缩机性能曲线的分析，对压缩机防喘振控制逻辑进行了分析及改进。
The control logic preventing the compressor from surge was analyzed and improved after the performance curve of compressor in gas turbine booster station was analyzed.
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