Semanlink - Retrieval-based NLP ; Question Answering AND Knowledge distillation

Βρες μου:

Search Doc:

Προτιμήσεις...

Ετικέτες

Arxiv Doc - Discuté avec Raphaël - Gautier Izacard - Knowledge-augmented Language Models - Knowledge distillation - Michael Glass - Neural Search - NLP@ENS - NLP@Facebook - Question Answering - Retriever-Reader - Slot filling - Zero shot -

Retrieval-based NLP ; Question Answering AND Knowledge distillation

Common descendants

2 Έγγραφα

[2207.06300] Re2G: Retrieve, Rerank, Generate

Tags:

2022-07-14 About

[2012.04584] Distilling Knowledge from Reader to Retriever for Question Answering

Tags:

> a method to train an information retrieval module for downstream tasks, **without using pairs of queries and documents as annotations**.

Uses two models (standard pipeline for open-domain QA):

- the first one retrieves documents from a large source of knowledge (the retriever)
- the second one processes the support documents to solve the task (the reader).

> First the retriever selects support passages in a large knowledge
source. Then these passages are processed by the reader, along with the question, to generate an
answer

Inspired by knowledge distillation: the reader model is the teacher and the retriever is the student.

> More precisely, we use a sequence-to-sequence model as the reader, and use
the attention activations over the input documents as synthetic labels to train the retriever. 
> (**train the retriever by learning to approximate the attention score of the reader**)

Refers to:

- [REALM: Retrieval-Augmented Language Model Pre-Training](doc:2020/12/2002_08909_realm_retrieval_a)
- [Dehghani: Neural Ranking Models with Weak Supervision](doc:?uri=https%3A%2F%2Farxiv.org%2Fabs%2F1704.08803)

2020-12-11 About