Classical feature extraction methods include: Principle Component Analysis, Singular Value Decomposition, Projection Pursuit, Self-Organizing Map, and so on.
传统的特征提取方法主要有：主分量分析、奇异值分解、投影追踪、自组织映射等。
These methods include the Principle component analysis, the Regression analysis, the Grey cognate analysis, the Delphi, the Ordering method, the Analytical Hierarchy Process, Fuzzy method.
目前学术界对土地等级评价所使用的主要方法有：主成分分析法、回归分析法、灰色关联度分析法、特尔斐法、排序法、层次分析法、模糊综合评价法。
The working principle, characteristics and electric parameter selection of the restraint EMI circuit are studied in this paper. The computing methods of electric component parameters are given.
对所设计的抑制电磁干扰电路的工作原理、特点和电气参数选择等进行了研究，给出了相应电气元件参数选择的计算方法。
Combining the principle of the Principal Component Transform and various data processing methods, automatic detection of land using changing information can be implemented by different methods.
结合主成分变换原理和不同的数据处理过程，可以用不同的方式实现土地利用变化信息的自动发现。
Dynamic and static mapping techniques are introduced as the qualitative methods. Statistical methods, inverse calculation and principle component analysis are introduced as the quantitative methods.
其中在定性方法中介绍了静态和动态标测法，在定量方法中则介绍了统计学方法、逆运算方法和主分量分析方法。
Dynamic and static mapping techniques are introduced here as the qualitative methods while statistical methods, inverse calculation and principle component analysis are introduced a.
本文提出了一种基于主分量分析法和反向传播神经网络的图像识别方法，并详细阐述了这种方法的具体实现过程。
Dynamic and static mapping techniques are introduced here as the qualitative methods while statistical methods, inverse calculation and principle component analysis are introduced a.
在定量处理方法中讨论了统计学方法、逆运算方法和主分量分析方法。
Methods of principle component analysis, clustering analysis, comparative analysis and modeling were employed.
研究方法：主成分法，聚类分析法，比较法，模型法。
Methods of principle component analysis, clustering analysis, comparative analysis and modeling were employed.
研究方法：主成分法，聚类分析法，比较法，模型法。
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