DATE: | Wed, Nov 27, 2013 |
TIME: | 11:45 am |
PLACE: | Council Room (SITE 5-084) |
TITLE: | An Ensemble Method Based on AdaBoost and Meta-Learning |
PRESENTER: | Xuan Liu University of Ottawa |
ABSTRACT:
We propose a new machine learning algorithm: meta-boosting. Using the boosting method a weak learner can be converted into a strong learner by
changing the weight distribution of the training examples. It is often regarded as a method for decreasing both the bias and variance although
it mainly reduces variance. Meta-learning has the advantage of coalescing the results of multiple learners to improve accuracy, which is a
bias reduction method. By combing boosting algorithms with different weak learners using the meta-learning scheme, both of the bias and
variance are reduced. Our experiments demonstrate that this meta-boosting algorithm not only displays superior performance than the best
results of the base-learners but that it also surpasses other recent algorithms
|