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Published byHartono Sudirman Modified over 6 years ago
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Robust Optimization and Applications in Machine Learning
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Part 2: Robust Classification
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Data matrix
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Classification problems
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What is a linear classifier?
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Separable data
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Non-separable data
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Loss functions
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Two specific loss functions
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Generalization error and regularization
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Regularization and Sparsity
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Robust classification
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Formulation of robustness approach
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Non-separable case
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Link with worst-case loss minimization
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Box uncertainty model
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Formulation
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Link with worst-case loss minimization
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Our findings so far
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Part 2: Robust Classification
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Classification with interval data
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Robust classification: main idea
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Main results
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Part 2: Robust Classification
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Robust classification with hinge loss
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Bound on robust SVM
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Part 2: Robust Classification
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Robust LR classification
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Robust LR: dual
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Moment matching
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Part 2: Robust Classification
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Minimax probability machine
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Problem statement
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Problem formulation
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Marhsall and Olkin’s result
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SOCP formulation
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Dual problem
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Geometric interpretation
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Solving the problem
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Robustness to estimation errors
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Robust MPM
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Formulation of Robust MPM
Lemma
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R-MPM: A Specific Uncertainty Model (1)
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R-MPM: A Specific Uncertainty Model (2)
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Robust MPM: Estimation Errors in Means
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Rost MPM: Estimation Errors in Covariance
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R-MPM: putting everything together
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Part 2: summary
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