Modeling gene regulatory networks from time series data using particle filtering /

Bibliographic Details
Main Author: Amina Noor
Other Authors: Serpedin, Erchin (Thesis advisor), Nounou, Mohamed (Thesis advisor)
Format: Thesis eBook
Language:English
Published: [College Station, Tex.] : [Texas A&M University], [2012]
Subjects:
Online Access:Link to OAK Trust copy

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502 |b Master of Science  |c Texas A&M University  |d 2011  |o http://hdl.handle.net/1969.1/ETD-TAMU-2011-08-9860 
504 |a Includes bibliographical references. 
516 |a Text (Thesis) 
520 3 |a This thesis considers the problem of learning the structure of gene regulatory networks using gene expression time series data. A more realistic scenario where the state space model representing a gene network evolves nonlinearly is considered while a linear model is assumed for the microarray data. To capture the nonlinearity, a particle filter based state estimation algorithm is studied instead of the contemporary linear approximation based approaches. The parameters signifying the regulatory relations among various genes are estimated online using a Kalman filter. Since a particular gene interacts with a few other genes only, the parameter vector is expected to be sparse. The state estimates delivered by the particle filter and the observed microarray data are then fed to a LASSO based least squares regression operation, which yields a parsimonious and efficient description of the regulatory network by setting the irrelevant coefficients to zero. The performance of the aforementioned algorithm is compared with Extended Kalman filtering (EKF), employing Mean Square Error as fidelity criterion using synthetic data and real biological data. Extensive computer simulations illustrate that the particle filter based gene network inference algorithm outperforms EKF and therefore, it can serve as a natural framework for modeling gene regulatory networks. 
500 |a Electronic resource. 
650 4 |a Major Electrical Engineering. 
653 |a gene network modeling 
653 |a lasso 
653 |a particle filter 
700 1 |a Serpedin, Erchin,  |e thesis advisor. 
700 1 |a Nounou, Mohamed,  |e thesis advisor. 
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