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Heart rate dynamic time irreversibility analysis method based on equivalent arrangement

A dynamic time and analysis method technology, applied in the field of physiological signal analysis, can solve the problem of no quantitative analysis of heart rate signals, etc., and achieve the effect of simplifying quantitative analysis

Active Publication Date: 2019-12-31
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

Conditional entropy, information storage, etc. have effectively measured the unpredictability and complexity of complex systems from the perspective of information theory. However, there are currently no effective parameters for quantitative analysis of the dynamic imbalance characteristics of heart rate signals.

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  • Heart rate dynamic time irreversibility analysis method based on equivalent arrangement
  • Heart rate dynamic time irreversibility analysis method based on equivalent arrangement
  • Heart rate dynamic time irreversibility analysis method based on equivalent arrangement

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Embodiment Construction

[0035] In order to facilitate those skilled in the art to understand the technical content of the present invention, the content of the present invention will be further explained below in conjunction with the accompanying drawings.

[0036] In order to facilitate understanding of the technical contents of the present invention, the following technical terms are now explained:

[0037] Dynamic time irreversible dTIR

[0038] Time reversibility refers to the property that the characteristics of the time series do not change with the reverse order of time, and the quantification of time irreversibility is for positive and negative sequences {X(t 1 ), X(t 2 ),…,X(t m )} joint probability distribution to measure the difference. The present invention defines dynamical time irreversibility (dTIR, dynamical time irreversibility) as the sequence {X(t 1 ), X(t 2 ),…,X(t m ), X(t m+1 ),…,X(t m+τ )} probability distribution difference and the current state sequence {X(t 1 ), X(t...

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Abstract

The invention discloses a heart rate dynamic time irreversibility analysis method based on equivalent arrangement which is applied to the physiological signal analysis technology field, and aims at solving a problem of lack of effective extraction of dynamic unbalance characteristics in the prior art. In the invention, a dynamic time irreversible concept is innovatively provided, a currently obtained heart rate signal serves as a positive sequence heart rate sequence, a time reverse sequence is performed on the positive sequence heart rate sequence so as to obtain a reverse sequence heart ratesequence. Then, multi-dimensional phase space reconstruction is performed on the positive sequence heart rate sequence and the reverse sequence heart rate sequence. Equivalent arrangement symbolization is performed on a space vector of the reconstructed positive and reverse heart rate sequences, and heart rate dynamic time irreversibility is extracted and identified by calculating a time irreversibility difference between the positive and reverse heart rate sequences in the past and the positive and reverse heart rate sequences in a current state based on equivalent arrangement. The method can be used to effectively extract and identify a dynamic time irreversible characteristic of the heart rates of healthy young people and old people.

Description

technical field [0001] The invention belongs to the technical field of physiological signal analysis, and in particular relates to dynamic imbalance analysis and symbol time series analysis technology of physiological signals. Background technique [0002] Heart rate regulation is mainly regulated by sympathetic and parasympathetic nerves and body fluids, and is affected by various internal (such as mental state, hormones, sleep, etc.) and external (such as temperature, humidity, sound, etc.) factors, so the heart rate regulation system is a typical complex dynamic systems. Imbalance is one of the characteristics of the complex heart rate system, and time irreversibility is an effective indicator to measure the imbalance. Time irreversibility is mainly used to measure the difference in the statistical characteristics of positive and negative sequences, and it is mainly used to measure the difference in joint probability. A variety of time-irreversible analysis methods curr...

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Application Information

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IPC IPC(8): G16H50/50G16H50/20A61B5/024A61B5/00
CPCA61B5/024A61B5/7271G16H50/20G16H50/50
Inventor 姚文坡王毓芳李杰奇郭大庆尧德中
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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