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Published bySharlene Parks Modified over 8 years ago
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Robust Optimization and Applications in Machine Learning
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Time-series prediction via linear least-squares
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Predicted output
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Properties of solution
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Non-linear prediction and kernels
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Properties of solution
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What is a kernel, anyway? SVM, LR, LS, MPM, PCA, CCA, FDA…
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Example: 2 nd -order polynomial kernel
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A classical way to use kernels
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Transduction framework
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Important property of kernel matrices
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Kernel optimization in least-squares
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Kernel optimization for least-squares
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Kernel optimization via SDP or SOCP
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A non-classical way to use kernels
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Kernel optimization in other problems
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Kernel optimization in SVM classifiers
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Kernel optimization in SVM classifiers (cont’d)
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Link with robust optimization
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Kernel optimization and data fusion mRNA expression data upstream region data (TF binding sites) protein-protein interaction data hydrophobicity data sequence data (gene, protein)
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Challenge
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Example of a Kernel for Genomic Data: Pairwise Comparison Kernel
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1 0 0 1 0 1 0 1 1 0 1 0 1 1 0 1 0 0 0 0 1 1 0 0 0 0 1 0 1 1 0 1 0 0 1 0 1 0 0 1 1 0 0 0 0 0 0 1 0 0 1 0 1 0 0 0 protein 2 Example of a Kernel for Genomic Data: Linear Interaction Kernel
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Exampe of a Kernel for Genomic Data: Diffusion Kernel
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Learning the Optimal Kernel K
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Integrate constructed kernels Learn a linear mix Large margin classifier (SVM) Maximize the margin
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Yeast Protein Function Prediction
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MRF SDP/SVM (binary) SDP/SVM (enriched) Yeast Protein Function Prediction
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MRF SDP/SVM (binary) SDP/SVM (enriched) Yeast Protein Function Prediction
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Part 3: summary
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