Thursday, January 30, 2020

YouTube recommendations using Mixture of Experts

Interesting read from Youtube Recommendations team (https://lnkd.in/e-k4YqN). They have used shallow tower (Wide and Deep Neural Networks) to remove position bias and introduced a Mixture of Experts to optimize for multiple objectives. Another interesting variation was to use PointWise Similarity for the Learn to Rank Re-Ranker for scalability reasons. It was also interesting to know that they tuned the weights of multiple experts manually. What are your thoughts?

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