Second order optimization for the inference of gene regulatory pathways
| Autor: | Rajat K. De, Mouli Das, C. A. Murthy |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Statistics and Probability
Mathematical optimization Genes Fungal Gene regulatory network Inference Plant Development Flowers Genes Plant Gene Expression Regulation Plant Learning rule Genetics Morphogenesis Animals Humans Gene Regulatory Networks Molecular Biology Mathematics Models Genetic Quantitative Biology::Molecular Networks Gene Expression Regulation Developmental T-Lymphocytes Helper-Inducer Quantitative Biology::Genomics Backpropagation Expression (mathematics) Weighting Computational Mathematics ComputingMethodologies_PATTERNRECOGNITION Stochastic gradient descent Gradient descent Algorithms |
| Zdroj: | Statistical applications in genetics and molecular biology. 13(1) |
| ISSN: | 1544-6115 |
| Popis: | With the increasing availability of experimental data on gene interactions, modeling of gene regulatory pathways has gained special attention. Gradient descent algorithms have been widely used for regression and classification applications. Unfortunately, results obtained after training a model by gradient descent are often highly variable. In this paper, we present a new second order learning rule based on the Newton's method for inferring optimal gene regulatory pathways. Unlike the gradient descent method, the proposed optimization rule is independent of the learning parameter. The flow vectors are estimated based on biomass conservation. A set of constraints is formulated incorporating weighting coefficients. The method calculates the maximal expression of the target gene starting from a given initial gene through these weighting coefficients. Our algorithm has been benchmarked and validated on certain types of functions and on some gene regulatory networks, gathered from literature. The proposed method has been found to perform better than the gradient descent learning. Extensive performance comparison with the extreme pathway analysis method has underlined the effectiveness of our proposed methodology. |
| Databáze: | OpenAIRE |
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