Evidence map›Paper›PMID 31416258›Full record

ArticleBrain sciences2019

EEG Signals Feature Extraction Based on DWT and EMD Combined with Approximate Entropy.

Na Ji, Liang Ma, Hui Dong, Xuejun Zhang

Abstract read
In one paragraph

Article in Brain sciences, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

24 citing papers in PubMed.

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  20. Deep Feature MiningFrontiers in bioengineering and biotechnology · 2021
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors.

Na JiCollege of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, 210023 Nanjing, China.
Liang MaCollege of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, 210023 Nanjing, China.
Hui DongCollege of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, 210023 Nanjing, China.
Xuejun ZhangCollege of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, 210023 Nanjing, China. xjzhang@njupt.edu.cn.

Funding

National Natural Science Foundation of China No.61271334
6 · The paper itself

Abstract

The classification recognition rate of motor imagery is a key factor to improve the performance of brain-computer interface (BCI). Thus, we propose a feature extraction method based on discrete wavelet transform (DWT), empirical mode decomposition (EMD), and approximate entropy. Firstly, the electroencephalogram (EEG) signal is decomposed into a series of narrow band signals with DWT, then the sub-band signal is decomposed with EMD to get a set of stationary time series, which are called intrinsic mode functions (IMFs). Secondly, the appropriate IMFs for signal reconstruction are selected. Thus, the approximate entropy of the reconstructed signal can be obtained as the corresponding feature vector. Finally, support vector machine (SVM) is used to perform the classification. The proposed method solves the problem of wide frequency band coverage during EMD and further improves the classification accuracy of EEG signal motion imaging.

Indexed as

approximate entropyclassification recognition ratediscrete wavelet transformempirical mode decompositionintrinsic mode functions

Identifiers

PMID31416258
PMCPMC6721346

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.