Xinnuo Xu

Alana: Social Dialogue using an Ensemble Model and a Ranker trained on User Feedback

2017 · Edinburgh Napier Research Repository (Edinburgh Napier University)

We describe our Alexa prize system (called ‘Alana’) which consists of an ensemble of bots, combining rule-based and machine learning systems, and using a contextual ranking mechanism to choose system responses. This paper reports on …

Better Conversations by Modeling, Filtering, and Optimizing for Coherence and Diversity

2018

We present three enhancements to existing encoder-decoder models for open-domain conversational agents, aimed at effectively modeling coherence and promoting output diversity: (1) We introduce a measure of coherence as the GloVe embedding similarity between the …