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The 25th International Conference on Machine Learning (ICML 2008)

Closed-form Supervised Dimensionality Reduction with Generalized Linear Models

author: Irina Rish, IBM T J Watson Research Center

Description

We propose a family of supervised dimensionality reduction (SDR) algorithms that combine feature extraction (dimensionality reduction) with learning a predictive model in a unified optimization framework, using data- and class-appropriate generalized linear models (GLMs), and handling both classification and regression problems. Our approach uses simple closed-form update rules and is provably convergent. Promising empirical results are demonstrated on a variety of high-dimensional datasets.

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Slides
0:00 Closed-Form Supervised Dimensionality Reduction with Generalized Linear Models
0:20 Outline
1:29 Motivating Application: Brain Imaging (Functional MRI)
3:13 Other High-Dimensional Applications
4:06 Why Dimensionality Reduction?
5:10 Why SUPERVISED Dimensionality Reduction (SDR)?
6:06 SDR: A General Framework
7:39 Related Work : Particular X → U and U → Y
9:24 Our Contributions
10:38 SDR Model: Exponential-Family Distributions with Low-Dimensional Natural Parameters
11:42 Another View: GLMs with Shared "Hidden Data"
12:44 SDR: Optimization Problem
13:54 SDR: Alternate Minimization Algorithm
14:50 Optimization via Auxiliary Functions
15:37 Auxiliary Functions for SDR-GLM
16:36 Key Idea: Combining Auxiliary Functions
17:39 Derivation of Closed-Form Update Rules
18:56 Empirical Evaluation on Simulated Data
19:23 Bernoulli Noise
20:46 Gaussian Noise
21:25 Regularization Parameter (Weight on Data Reconstruction Loss)
22:05 Real-life Data: Sensor Network Connectivity
22:47 Real-life Data: Mental state prediction from fMRI
23:22 Real-life Data: PBAIC 2007 fMRI Dataset
24:51 - Questions

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