Challenges: Transfer the distance metric from a source domain (such as textual) to another domain (such as visual) that has different feature representation.

Just like human, machine can also find the common knowledge between tasks and transfer the knowledge from one task to another one. In machine learning, we can exploit training examples drawn from some related tasks (source domains) to improve the performance on the target task (target domain). This relates two terms in machine learning, i.e., domain adaptation and transfer learning. Domain adaptation refers to how to reduce the difference between the distributions of source and target domain data. Transfer learning refers to how to extract knowledge from source tasks and apply it to improve the learning performance of a target task. This project aims to study the domain adaptation and transfer learning problems from a causal perspective.

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