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A Time Irreversible Analysis Method of Physiological Signals Based on Amplitude Arrangement

A technology of physiological signal and inverse analysis, applied in medical science, instruments, character and pattern recognition, etc., can solve problems such as errors, time irreversible analysis, concept errors, etc., and achieve the effect of avoiding conceptual errors

Active Publication Date: 2020-07-31
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

In the time irreversible analysis of physiological complex systems, in order to achieve fast and real-time feature extraction, the probability distribution difference of symmetric vectors is often used. However, in the original arrangement method, the arrangement of symmetric vectors is not in a symmetrical form. Many existing The literature uses symmetrical arrangement to measure time irreversible analysis, which has caused many conceptual errors in some existing research work
[0004] The permutation method is very important in the time-irreversible analysis of physiological systems, but the defects of the original permutation method lead to some errors in the time-irreversible analysis of physiological signals, so how to realize the permutation according to the size relationship of the elements in the sequence and the original form of the sequence It is very important for time irreversible analysis and has very important significance

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  • A Time Irreversible Analysis Method of Physiological Signals Based on Amplitude Arrangement
  • A Time Irreversible Analysis Method of Physiological Signals Based on Amplitude Arrangement
  • A Time Irreversible Analysis Method of Physiological Signals Based on Amplitude Arrangement

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Embodiment Construction

[0030] For the convenience of those skilled in the art to understand the technical contents of the present invention, below in conjunction with the attached Figure 1-4 The content of the present invention is further explained.

[0031] Such as figure 1 Shown, a kind of physiological signal time irreversible analysis method based on amplitude arrangement of the present invention comprises the following steps:

[0032] S1. Assuming a physiological sequence X(t) of length L={x(1),x(2),...,x(L)}, perform phase space reconstruction of the sequence X(t) into a multi-dimensional vector where m is the vector dimension, τ is the time delay,

[0033]

[0034] S2. Map the multidimensional vector of the physiological sequence to the magnitude equivalent arrangement to obtain the magnitude arrangement sequence π(n)={π(1),π(2),...,π(L-(m-1)τ)}.

[0035] S21. Hypothesis The vector in is {x 1 ,...,x i-1 ,x i ,x i+1 ,...,x m}, sort the elements in it in ascending order x i,1 i,...

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Abstract

The invention discloses a time-irreversible analysis method of physiological signals based on amplitude arrangement, which is applied in the field of EEG signal processing. Aiming at the problem that the existing arrangement method cannot effectively extract the nonlinear characteristics of EEG signals in time-irreversible analysis, the present invention utilizes arrangement The type and element amplitude relationship effectively reflects the amplitude variation form of the physiological signal vector, especially in the time irreversible analysis, effectively avoiding the conceptual error caused by the difference between the symmetrical vector and the symmetrical arrangement. Better stability in time irreversible quantitative analysis.

Description

technical field [0001] The invention belongs to the field of physiological signal processing, and in particular relates to a symbolic time series analysis and time irreversible analysis technology of physiological signals. Background technique [0002] The human physiological system has interactions at different levels and scales, and is affected by various internal (body fluids, hormones, etc.) and external (temperature, humidity, etc.) factors, so the physiological system is a typical complex system. Imbalance is one of the hallmarks of complex physiological signals, which can be measured by temporal irreversibility. At present, the quantitative analysis of time irreversibility of physiological signals mostly adopts the method of simplified sequence, and the permutation method plays an important role in the analysis of time irreversibility because of its close relationship with multidimensional vectors. [0003] The current arrangement method is based on the element coord...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/0476A61B5/00G06K9/62
CPCA61B5/4094A61B5/7235A61B5/369G06F18/2113
Inventor 姚文坡李俊俊徐达军郭大庆王俊尧德中
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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