Semanlink - Retriever

Parents:

Information retrieval: techniques

Retriever

Related Tags:

Neural Search

Descendants

Dense retriever
Retriever-Reader
- BLINK
- RAG (Retrieval-Augmented Generation)
  - HyDE
  - LLM Fine-tuning vs RAG
  - RAG: Agents
  - RAG: chunking
  - RAG + KG
  - RAG evaluation
  - RAG isn't easy
  - WalkingRAG
- Retriever-Ranker
Sparse retrieval
- SPLADE

4 Documents (Long List)

[2107.05720] SPLADE: Sparse Lexical and Expansion Model for First Stage Ranking

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2023-05-18 About

Jerry Liu sur Twitter : "Tuning top-k for semantic search is challenging... Introducing the LlamaIndex AutoRetriever for vector databases"

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2023-05-13 About

[2206.10658] Questions Are All You Need to Train a Dense Passage Retriever

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> **approach for training dense retrieval models that does not require any labeled training data**. Dense retrieval is a central challenge for open-domain tasks, such as Open QA, where state-of-the-art methods typically require large supervised datasets with custom hard-negative mining and denoising of positive examples.
>
> ART, in contrast, only requires access to unpaired inputs and outputs (e.g. questions and potential answer documents).
>
> It uses a new document-retrieval autoencoding scheme, where
> 1. an input question is used to retrieve a set of evidence documents, and
> 2. the documents are then used to compute the probability of reconstructing the original question.
>
> Training for retrieval based on question reconstruction enables effective unsupervised learning of both document and question encoders, which can be later incorporated into complete Open QA systems without any further finetuning.

[Tweet](doc:2022/07/devendra_singh_sachan_sur_twitt)

> Given an
input question, ART first retrieves a small set
of possible evidences documents. It then recon
structs
the original question by attending to these
documents
>
> The
key idea in ART is to consider the retrieved documents
as a noisy representation of the original
question and question reconstruction probability
as a way of denoising that provides soft-labels for
how likely each document is to have been the correct
result

Refers to [[IZACARD 2012.04584] Distilling Knowledge from Reader to Retriever for Question Answering](doc:2020/12/2012_04584_distilling_knowled)

2022-07-06 About

Devendra Singh Sachan sur Twitter : "ART (Autoencoding-based Retriever Training), an unsupervised method to train a dense retriever that only uses questions and a collection of unpaired documents as the training data."

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2022-07-06 About

Properties

sl:creationDate : 2022-07-06
sl:creationTime : 2022-07-06T23:17:29Z
rdf:type : sl:Tag
skos:prefLabel : Retriever