880 research outputs found
A PDTB-Styled End-to-End Discourse Parser
We have developed a full discourse parser in the Penn Discourse Treebank
(PDTB) style. Our trained parser first identifies all discourse and
non-discourse relations, locates and labels their arguments, and then
classifies their relation types. When appropriate, the attribution spans to
these relations are also determined. We present a comprehensive evaluation from
both component-wise and error-cascading perspectives.Comment: 15 pages, 5 figures, 7 table
Discourse parsing: Inferring discourse structure, modeling coherence, and its applications
Ph.DDOCTOR OF PHILOSOPH
Improving Biomedical Entity Linking with Retrieval-enhanced Learning
Biomedical entity linking (BioEL) has achieved remarkable progress with the
help of pre-trained language models. However, existing BioEL methods usually
struggle to handle rare and difficult entities due to long-tailed distribution.
To address this limitation, we introduce a new scheme NN-BioEL, which
provides a BioEL model with the ability to reference similar instances from the
entire training corpus as clues for prediction, thus improving the
generalization capabilities. Moreover, we design a contrastive learning
objective with dynamic hard negative sampling (DHNS) that improves the quality
of the retrieved neighbors during inference. Extensive experimental results
show that NN-BioEL outperforms state-of-the-art baselines on several
datasets.Comment: Accepted by ICASSP 202
PMC-VQA: Visual Instruction Tuning for Medical Visual Question Answering
In this paper, we focus on the problem of Medical Visual Question Answering
(MedVQA), which is crucial in efficiently interpreting medical images with
vital clinic-relevant information. Firstly, we reframe the problem of MedVQA as
a generation task that naturally follows the human-machine interaction, we
propose a generative-based model for medical visual understanding by aligning
visual information from a pre-trained vision encoder with a large language
model. Secondly, we establish a scalable pipeline to construct a large-scale
medical visual question-answering dataset, named PMC-VQA, which contains 227k
VQA pairs of 149k images that cover various modalities or diseases. Thirdly, we
pre-train our proposed model on PMC-VQA and then fine-tune it on multiple
public benchmarks, e.g., VQA-RAD and SLAKE, outperforming existing work by a
large margin. Additionally, we propose a test set that has undergone manual
verification, which is significantly more challenging, even the best models
struggle to solve
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