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      Belief entropy-of-entropy and its application in the cardiac interbeat interval time series analysis

      , , ,
      Chaos, Solitons & Fractals
      Elsevier BV

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          A Mathematical Theory of Communication

          C. Shannon (1948)
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            Physiological time-series analysis using approximate entropy and sample entropy.

            Entropy, as it relates to dynamical systems, is the rate of information production. Methods for estimation of the entropy of a system represented by a time series are not, however, well suited to analysis of the short and noisy data sets encountered in cardiovascular and other biological studies. Pincus introduced approximate entropy (ApEn), a set of measures of system complexity closely related to entropy, which is easily applied to clinical cardiovascular and other time series. ApEn statistics, however, lead to inconsistent results. We have developed a new and related complexity measure, sample entropy (SampEn), and have compared ApEn and SampEn by using them to analyze sets of random numbers with known probabilistic character. We have also evaluated cross-ApEn and cross-SampEn, which use cardiovascular data sets to measure the similarity of two distinct time series. SampEn agreed with theory much more closely than ApEn over a broad range of conditions. The improved accuracy of SampEn statistics should make them useful in the study of experimental clinical cardiovascular and other biological time series.
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              Multiscale entropy analysis of biological signals

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                Author and article information

                Journal
                Chaos, Solitons & Fractals
                Chaos, Solitons & Fractals
                Elsevier BV
                09600779
                February 2022
                February 2022
                : 155
                : 111736
                Article
                10.1016/j.chaos.2021.111736
                cf81104f-78a1-48aa-a079-0ac16f59c66d
                © 2022

                https://www.elsevier.com/tdm/userlicense/1.0/

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