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Robust Optimization and Applications in Machine Learning

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Presentation on theme: "Robust Optimization and Applications in Machine Learning"— Presentation transcript:

1 Robust Optimization and Applications in Machine Learning

2 Part 2: Robust Classification

3 Data matrix

4 Classification problems

5 What is a linear classifier?

6 Separable data

7 Non-separable data

8 Loss functions

9 Two specific loss functions

10 Generalization error and regularization

11 Regularization and Sparsity

12 Robust classification

13 Formulation of robustness approach

14 Non-separable case

15 Link with worst-case loss minimization

16 Box uncertainty model

17 Formulation

18 Link with worst-case loss minimization

19 Our findings so far

20 Part 2: Robust Classification

21 Classification with interval data

22 Robust classification: main idea

23 Main results

24 Part 2: Robust Classification

25 Robust classification with hinge loss

26 Bound on robust SVM

27 Part 2: Robust Classification

28 Robust LR classification

29 Robust LR: dual

30 Moment matching

31 Part 2: Robust Classification

32 Minimax probability machine

33 Problem statement

34 Problem formulation

35 Marhsall and Olkin’s result
? ?

36 SOCP formulation

37 Dual problem

38 Geometric interpretation

39 Solving the problem

40 Robustness to estimation errors

41 Robust MPM

42 Formulation of Robust MPM
Lemma

43 R-MPM: A Specific Uncertainty Model (1)

44 R-MPM: A Specific Uncertainty Model (2)

45 Robust MPM: Estimation Errors in Means

46 Rost MPM: Estimation Errors in Covariance

47 R-MPM: putting everything together

48 Part 2: summary


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