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Báo cáo khoa học: "Logarithmic Opinion Pools for Conditional Random Fields"

Chia sẻ: Nhung Nhung | Ngày: | Loại File: PDF | Số trang:8

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Báo cáo khoa học: "Logarithmic Opinion Pools for Conditional Random Fields"

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Recent work on Conditional Random Fields (CRFs) has demonstrated the need for regularisation to counter the tendency of these models to overfit. The standard approach to regularising CRFs involves a prior distribution over the model parameters, typically requiring search over a hyperparameter space. In this paper we address the overfitting problem from a different perspective, by factoring the CRF distribution into a weighted product of individual “expert” CRF distributions. We call this model a logarithmic opinion pool (LOP) of CRFs (LOP-CRFs). We apply the LOP-CRF to two sequencing tasks. ...

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