نتایج جستجو برای: wavelet enhanced ica

تعداد نتایج: 391800  

A. Ahmadian A. Boroomand M.A. Oghabian

Introduction: The accuracy of analyzing Functional MRI (fMRI) data is usually decreases in the presence of noise and artifact sources. A common solution in for analyzing fMRI data having high noise is to use suitable preprocessing methods with the aim of data denoising. Some effects of preprocessing methods on the parametric methods such as general linear model (GLM) have previously been evalua...

Journal: :IEEE transactions on neural networks 2003
Chengjun Liu Harry Wechsler

We present an independent Gabor features (IGFs) method and its application to face recognition. The novelty of the IGF method comes from 1) the derivation of independent Gabor features in the feature extraction stage and 2) the development of an IGF features-based probabilistic reasoning model (PRM) classification method in the pattern recognition stage. In particular, the IGF method first deri...

Journal: :Journal of neuroscience methods 2013
Fengyu Cong Zhaoshui He Jarmo Hämäläinen Paavo H T Leppänen Heikki Lyytinen Andrzej Cichocki Tapani Ristaniemi

This study addresses how to validate the rationale of group component analysis (CA) for blind source separation through estimating the number of sources in each individual EEG dataset via model order selection. Control children, typically reading children with risk for reading disability (RD), and children with RD participated in the experiment. Passive oddball paradigm was used for eliciting m...

2014
Huaqing Wang Ruitong Li Gang Tang Hongfang Yuan Qingliang Zhao Xi Cao Dewen Hu

A Compound fault signal usually contains multiple characteristic signals and strong confusion noise, which makes it difficult to separate week fault signals from them through conventional ways, such as FFT-based envelope detection, wavelet transform or empirical mode decomposition individually. In order to improve the compound faults diagnose of rolling bearings via signals' separation, the pre...

2017
Y. Moudden P. Abrial P. Vielva J.-B. Melin Jean-Luc Starck J.-F. Cardoso J. Delabrouille M. K. Nguyen J.-L. Starck

Spectral matching ICA (SMICA) is a source separation method based on covariance matching in Fourier space that was designed to address in a flexible way some of the general problems raised by Cosmic Microwave Background data analysis. However, a common issue in astronomical data analysis is that the observations are unevenly sampled or incomplete maps with missing patches or intentionally maske...

2004
T. Christ

Background—Although downregulation of L-type Ca current (ICa,L) in chronic atrial fibrillation (AF) is an important determinant of electrical remodeling, the molecular mechanisms are not fully understood. Here, we tested whether reduced ICa,L in AF is associated with alterations in phosphorylation-dependent channel regulation. Methods and Results—We used whole-cell voltage-clamp technique and b...

2013
Astha Agarwal Amita Jain

BACKGROUND & OBJECTIVES All colonizing and invasive staphylococcal isolates may not produce biofilm but may turn biofilm producers in certain situations due to change in environmental factors. This study was done to test the hypothesis that non biofilm producing clinical staphylococci isolates turn biofilm producers in presence of sodium chloride (isotonic) and high concentration of glucose, ir...

2012
Hua Xin Feng Zhou Tao Liu Guang-Yong Li Jing Liu Zhe-Zhu Gao Guang-Yi Bai Hong Lu Zhong-Cheng Xin

This study investigated the effect of Icariin (ICA) supplementation on diabetic retinopathy (DR) in a streptozotocin-induced diabetic rat model system. Fifty Sprague Dawley rats were randomly distributed into a control group and a streptozotocin-induced diabetes group. Diabetic rats were randomly divided into two groups; one group received ICA 5 mg/kg/day for 12 weeks by oral gavage; the other ...

Journal: :Wireless Communications and Mobile Computing 2022

Electroencephalogram (EEG) signal processing is a very important module in the brain-computer interface system. As an physiological feature of human body, EEG signals are closely related to functional state cerebral nervous However, collected on scalp generally weak and inevitably subject various noise interferences. In order remove artifacts from brain computer interfaces (BCIs), fusion algori...

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