نتایج جستجو برای: ica algorithm

تعداد نتایج: 760847  

2015
Sargam Parmar Bhuvan Unhelkar

AbstrACt In commercial cellular networks, like the systems based on direct sequence code division multiple access (DSCD-MA), many types of interferences can appear, starting from multiuser interference inside each sector in a cell to interoperator interference. Also unintentional jamming can be present due to co-existing systems at the same band, whereas intentional jamming arises mainly in mil...

Template matching is a widely used technique in many of image processing and machine vision applications. In this paper we propose a new as well as a fast and reliable template matching algorithm which is invariant to Rotation, Scale, Translation and Brightness (RSTB) changes. For this purpose, we adopt the idea of ring projection transform (RPT) of image. In the proposed algorithm, two novel s...

Journal: :The Open Automation and Control Systems Journal 2015

2011
Andrew Saxe Maneesh Bhand Ritvik Mudur Bipin Suresh Andrew Y. Ng

Independent component analysis (ICA) The ICA algorithm has been applied successfully to modeling V1 simple cell receptive fields [1, 2]. It is closely related to sparse coding methods, and can be cast in terms of a simple generative model [3]: We suppose that our data x ∈ R is an unknown linear mixture of independent, non-Gaussian sources, i.e. x = As where A ∈ Rn×n is unknown. During learning,...

Journal: :Digital Signal Processing 2005
Thang Viet Nguyen Jagdish Chandra Patra Amitabha Das

Simple linear independent component analysis (ICA) algorithms work efficiently only in linear mixing environments. Whereas, a nonlinear ICA model, which is more complicated, would be more practical for general applications as it can work with both linear and nonlinear mixtures. In this paper, we introduce a novel method for nonlinear ICA problem. The proposed method follows the post nonlinear a...

2004
Juan Manuel Górriz Carlos García Puntonet

In this paper we proposed a genetic algorithm to minimize a nonconvex and nonlinear cost function based on statistical estimators for solving blind source separation-independent component analysis problem. In this way a novel method for blindly separating unobservable independent component signals from their linear and non linear (using mapping functions) mixtures is devised. The GA presented i...

Journal: :VLSI Signal Processing 2004
Vince D. Calhoun Godfrey D. Pearlson Tülay Adali

We introduce and apply a synthesis/analysis model for analyzing functional Magnetic Resonance Imaging (fMRI) data using independent component analysis (ICA). Our model assumes statistically independent spatial sources in the brain. We also assume that the fMRI scanner acquires overdetermined data such that there are more time points than brain sources. We discuss the properties of each of the s...

Journal: :Neurocomputing 2007
Heeyoul Choi Seungjin Choi

In this paper we present a method of parameter optimization, relative trust-region learning, where the trust-region method and the relative optimization [21] are jointly exploited. The relative trust-region method finds a direction and a step size with the help of a quadratic model of the objective function (as in the conventional trust-region methods) and updates parameters in a multiplicative...

Journal: :IEEE Sensors Journal 2021

Alcoholism is a widely affected disorder that leads to critical brain deficiencies such as emotional and behavioural impairments. One of the prominent sources detect alcoholism by analysing Electroencephalogram (EEG) signals. Previously, most works have focused on detecting using various machine deep learning algorithms. This paper has used novel algorithm named Sliding Singular Spectrum Analys...

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