基于共同主成分的多元时间序列降维方法  

Dimension reduction method for multivariate time series based on common principal component

作　　者：李正欣[1] 郭建胜[1] 惠晓滨[1] 宋飞飞[1] 

机构地区：[1]空军工程大学装备管理与安全工程学院,西安710051

出　　处：《控制与决策》2013年第4期531-536,共6页Control and Decision

摘　　要：针对常见的降维方法难以有效保留多元时间序列主要特征的问题,分析了传统主成分分析(PCA)方法在多元时间序列降维中的局限性,提出一种基于共同主成分分析的多元时间序列降维方法,并通过仿真实验比较了两种方法的降维有效性和计算复杂度.实验结果表明,所提出的降维方法能够以相对较小的计算代价,更有效地对多元时间序列进行降维.Existing dimension reduction method for multivariate time series can＇t preserve their feature effectively. Therefore, the drawback of PCA method is analyzed, when it is used in MTS dimension reduction, and based on common principal component analysis, a dimension reduction method for multivariate time series is proposed. The computational complexity and the validity of dimension reduction are compared between different methods. The results of experiments show that the proposed method can reduce dimension effectively at comparatively low computational cost, and at the same time preserve most feature of multivariate time series.

关 键 词：降维 多元时间序列 主成分分析 共同主成分分析 计算复杂度 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]