🚀 Re2G中FEVER问题编码器的模型卡片

本模型用于将问题编码为向量，可作为近似最近邻索引的查询。它结合上下文编码器，能在信息检索等任务中发挥重要作用。

📚 详细文档

模型详情

RAG、Multi - DPR和KGI的方法是训练一个神经信息检索（IR）组件，并通过其在生成正确输出中的影响进行端到端训练。

训练、评估和推理

训练、评估和推理的代码可在我们的GitHub仓库的re2g分支中找到。

使用方法

使用该模型的最佳方式是调整dpr_apply.py。

引用信息

@inproceedings{glass-etal-2022-re2g,
    title = "{R}e2{G}: Retrieve, Rerank, Generate",
    author = "Glass, Michael  and
      Rossiello, Gaetano  and
      Chowdhury, Md Faisal Mahbub  and
      Naik, Ankita  and
      Cai, Pengshan  and
      Gliozzo, Alfio",
    booktitle = "Proceedings of the 2022 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies",
    month = jul,
    year = "2022",
    address = "Seattle, United States",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/2022.naacl-main.194",
    doi = "10.18653/v1/2022.naacl-main.194",
    pages = "2701--2715",
    abstract = "As demonstrated by GPT-3 and T5, transformers grow in capability as parameter spaces become larger and larger. However, for tasks that require a large amount of knowledge, non-parametric memory allows models to grow dramatically with a sub-linear increase in computational cost and GPU memory requirements. Recent models such as RAG and REALM have introduced retrieval into conditional generation. These models incorporate neural initial retrieval from a corpus of passages. We build on this line of research, proposing Re2G, which combines both neural initial retrieval and reranking into a BART-based sequence-to-sequence generation. Our reranking approach also permits merging retrieval results from sources with incomparable scores, enabling an ensemble of BM25 and neural initial retrieval. To train our system end-to-end, we introduce a novel variation of knowledge distillation to train the initial retrieval, reranker and generation using only ground truth on the target sequence output. We find large gains in four diverse tasks: zero-shot slot filling, question answering, fact checking and dialog, with relative gains of 9{\%} to 34{\%} over the previous state-of-the-art on the KILT leaderboard. We make our code available as open source.",
}

模型描述

模型创建者在相关论文中指出：

正如GPT - 3和T5所展示的，随着参数空间越来越大，Transformer的能力也在不断增强。然而，对于需要大量知识的任务，非参数内存允许模型以亚线性的计算成本和GPU内存需求大幅增长。最近的模型如RAG和REALM已将检索引入到条件生成中。这些模型包含了从段落语料库进行的神经初始检索。我们在此研究基础上，提出了Re2G，它将神经初始检索和重排序结合到基于BART的序列到序列生成中。我们的重排序方法还允许合并来自分数不可比来源的检索结果，从而实现BM25和神经初始检索的集成。为了端到端地训练我们的系统，我们引入了一种新颖的知识蒸馏变体，仅使用目标序列输出的真实值来训练初始检索、重排序器和生成器。我们在四个不同的任务中取得了显著的收益：零样本插槽填充、问答、事实核查和对话，在KILT排行榜上相对于先前的最先进技术有9%到34%的相对提升。我们将代码开源。

📖 使用场景

直接使用

该模型可用于将问题编码为向量，作为近似最近邻索引的查询。它必须与将段落编码为向量并进行索引的上下文编码器结合使用。

📄 许可证

本模型采用Apache 2.0许可证。

📜 引用

BibTeX格式：

@inproceedings{glass-etal-2022-re2g,
    title = "{R}e2{G}: Retrieve, Rerank, Generate",
    author = "Glass, Michael  and
      Rossiello, Gaetano  and
      Chowdhury, Md Faisal Mahbub  and
      Naik, Ankita  and
      Cai, Pengshan  and
      Gliozzo, Alfio",
    booktitle = "Proceedings of the 2022 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies",
    month = jul,
    year = "2022",
    address = "Seattle, United States",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/2022.naacl-main.194",
    doi = "10.18653/v1/2022.naacl-main.194",
    pages = "2701--2715",
    abstract = "As demonstrated by GPT-3 and T5, transformers grow in capability as parameter spaces become larger and larger. However, for tasks that require a large amount of knowledge, non-parametric memory allows models to grow dramatically with a sub-linear increase in computational cost and GPU memory requirements. Recent models such as RAG and REALM have introduced retrieval into conditional generation. These models incorporate neural initial retrieval from a corpus of passages. We build on this line of research, proposing Re2G, which combines both neural initial retrieval and reranking into a BART-based sequence-to-sequence generation. Our reranking approach also permits merging retrieval results from sources with incomparable scores, enabling an ensemble of BM25 and neural initial retrieval. To train our system end-to-end, we introduce a novel variation of knowledge distillation to train the initial retrieval, reranker and generation using only ground truth on the target sequence output. We find large gains in four diverse tasks: zero-shot slot filling, question answering, fact checking and dialog, with relative gains of 9{\%} to 34{\%} over the previous state-of-the-art on the KILT leaderboard. We make our code available as open source.",
}