A directional mutation operator is designed by using the user's uncertain cognitive. The main ingredient analysis is used to identify the user's uncertain cognitive.
利用用户认知的不确定性设计定向变异算子。首先，采用主成分分析法辨识用户认知的不确定性；
The main ingredient analysis, which can solve the traditional analysis problems effectively, is a kind of statistical analysis containing multiple attribute decision-making.
而主成分分析法是一种多指标决策的统计方法，能有效弥补传统分析方法的弊端。
Refer to the relevant literature and data, analysis of the main ingredient of printing process emissions.
参考相关文献和资料，分析印刷过程中产生的废气的主要成分。
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