Spui, Amsterdam, Netherlands
SEA: Search Engines Amsterdam
This edition of SEA will be held in SPUI25.
16:00 – 16:30 Artem Grotov
16:30 – 17:00 Steve Dodson
17:00 – 18:00 Drinks & Snacks
Details of the talks:
Artem Grotov — Deep Counterfactual Learning
Deep learning is increasingly important for training interactive systems such as search engines and recommenders. They are applied to broad a range of tasks, including ranking, text similarity, and classification. Training neural network to perform classification requires a lot of labeled data. While collecting large supervised labeled data sets is expensive and sometimes impossible, for example for personalized tasks, there often is an abundance of logged data collected from user interactions with an existing system. This type of data is called logged bandit feedback and utilizing it is challenging because such data is noisy, biased and incomplete. We propose a learning method, Constrained Conterfactual Risk Minimisation (CCRM), based on counterfactual risk minimization of empirical Bernstein bound to tackle this problem and learn from logged bandit feedback. We evaluate CCRM on an image classification task. We find that CCRM performs well in practice and outperforms existing methods.
Artem Grotov is a PhD candidate at ILPS, UvA, supervised by Prof. Maarten de Rijke.
Steve Dodson — Extracting Insights from Time Series with Unsupervised Machine Learning
Details for Steve Dodson’s talk will be added soon.