On the Training/Test Distributions Gap: A Data Representation Learning Framework
On the Training/Test Distributions Gap: A Data Representation Learning Framework
This chapter discusses some dataset shift learning problems from a formal, statistical point of view. It provides definitions for “multitask learning,” “inductive transfer,” and “domain adaptation,” and discusses the parameters along which such learning scenarios may be taxonomized. The chapter then focuses on one concrete setting of domain adaptation and demonstrates how error bounds can be derived for it. These bounds can be reliably estimated from finite samples of training data, and do not rely on any assumptions concerning similarity between the domain from which the labeled training data is sampled and the target (or test) data. However, they are relative to the performance of some optimal classifier, rather than providing any absolute performance guarantee.
Keywords: dataset shift learning, multitask learning, inductive transfer, domain adaptation, error bounds
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