Paul Yacci

Abstract

Microarrays, which allow for the measurement of thousands of gene expression levels in parallel, have created a wealth of data not previously available to biologists along with new computational challenges. Microarray studies are characterized by a low sample number and a large feature space with many features irrelevant to the problem being studied. This makes feature selection a necessary pre-processing step for many analyses, particularly classification. A Genetic Algorithm -Artificial Neural Network (ANN) wrapper approach is implemented to find the highest scoring set of features for an ANN classifier. Each generation relies on the performance of a set of features trained on an ANN for fitness evaluation. A publically-available leukemia microarray data set (Golub et al., 1999), consisting of 25 AML and 47 ALL Leukemia samples, each with 7129 features, is used to evaluate this approach. Results show an increased performance over Golub's initial findings.

Library of Congress Subject Headings

DNA microarrays--Data processing; Genetic algorithms; Neural networks (Computer science)

Publication Date

5-1-2009

Document Type

Thesis

Department, Program, or Center

Biomedical Sciences (CHST)

Advisor

Gaborski, Roger

Advisor/Committee Member

Haaker, Anne

Advisor/Committee Member

Skuse, Gary

Comments

Note: imported from RIT’s Digital Media Library running on DSpace to RIT Scholar Works. Physical copy available through RIT's The Wallace Library at: QP624.5.D726 Y33 2009

Campus

RIT – Main Campus

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