Toward Scalable Learning with Non-uniform Distributions: E ects and a Multi-classi er Approach
نویسندگان
چکیده
Many factors innuence the performance of a learned classiier. In this paper we study diier-ent methods of measuring performance based on a uniied set of cost models and the eeects of training class distribution with respect to these models. Observations from these eeects help us devise a distributed multi-classiier meta-learning approach to learn in domains with skewed class distributions, non-uniform cost per error, and large amounts of data. One such domain is credit card fraud detection and our empirical results indicate that, up to a certain degree of skewed distribution , our approach can signiicantly reduce loss due to illegitimate transactions.
منابع مشابه
Learning with Non - uniform Class and CostDistributions : E ects and a Multi - classi erApproachPHILIP
Many factors innuence a learning process and the performance of a learned classiier. In this paper we investigate the performance eeects of class distribution in the training set. We also study diierent methods of measuring performance based on cost models and the performance eeects of training class distribution with respect to the diierent cost models. Observations from these eeects help us d...
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