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PhysioCover: Recovering the Missing Values in Physiological Data of Intensive Care Units
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  • Journal title : International Journal of Contents
  • Volume 10, Issue 2,  2014, pp.47-58
  • Publisher : The Korea Contents Association
  • DOI : 10.5392/IJoC.2014.10.2.047
 Title & Authors
PhysioCover: Recovering the Missing Values in Physiological Data of Intensive Care Units
Kim, Sun-Hee; Yang, Hyung-Jeong; Kim, Soo-Hyung; Lee, Guee-Sang;
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 Abstract
Physiological signals provide important clues in the diagnosis and prediction of disease. Analyzing these signals is important in health and medicine. In particular, data preprocessing for physiological signal analysis is a vital issue because missing values, noise, and outliers may degrade the analysis performance. In this paper, we propose PhysioCover, a system that can recover missing values of physiological signals that were monitored in real time. PhysioCover integrates a gradual method and EM-based Principle Component Analysis (PCA). This approach can (1) more readily recover long- and short-term missing data than existing methods, such as traditional EM-based PCA, linear interpolation, 5-average and Missing Value Singular Value Decomposition (MSVD), (2) more effectively detect hidden variables than PCA and Independent component analysis (ICA), and (3) offer fast computation time through real-time processing. Experimental results with the physiological data of an intensive care unit show that the proposed method assigns more accurate missing values than previous methods.
 Keywords
Intensive Care Unit;Missing Values;Hidden variable;Real Time Processing and EM-Principle Component Analysis;
 Language
English
 Cited by
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