59 research outputs found
An Improved Baseline for Sentence-level Relation Extraction
Sentence-level relation extraction (RE) aims at identifying the relationship
between two entities in a sentence. Many efforts have been devoted to this
problem, while the best performing methods are still far from perfect. In this
paper, we revisit two problems that affect the performance of existing RE
models, namely entity representation and noisy or ill-defined labels. Our
improved baseline model, incorporated with entity representations with typed
markers, achieves an F1 of 74.6% on TACRED, significantly outperforms previous
SOTA methods. Furthermore, the presented new baseline achieves an F1 of 91.1%
on the refined Re-TACRED dataset, demonstrating that the pre-trained language
models achieve unexpectedly high performance on this task. We release our code
to the community for future research.Comment: Code available at https://github.com/wzhouad/RE_improved_baselin
Improving Factuality of Abstractive Summarization without Sacrificing Summary Quality
Improving factual consistency of abstractive summarization has been a widely
studied topic. However, most of the prior works on training factuality-aware
models have ignored the negative effect it has on summary quality. We propose
EFACTSUM (i.e., Effective Factual Summarization), a candidate summary
generation and ranking technique to improve summary factuality without
sacrificing summary quality. We show that using a contrastive learning
framework with our refined candidate summaries leads to significant gains on
both factuality and similarity-based metrics. Specifically, we propose a
ranking strategy in which we effectively combine two metrics, thereby
preventing any conflict during training. Models trained using our approach show
up to 6 points of absolute improvement over the base model with respect to
FactCC on XSUM and 11 points on CNN/DM, without negatively affecting either
similarity-based metrics or absractiveness.Comment: ACL 202
An extended ordinary state-based peridynamics for non-spherical horizons
This work presents an extended ordinary state-based peridynamics (XOSBPD)
model for the non-spherical horizons. Based on the OSBPD, we derive the XOSBPD
by introducing the Lagrange multipliers to guarantee the non-local dilatation
and non-local strain energy density (SED) are equal to local dilatation and
local SED, respectively. In this formulation, the XOSBPD removes the limitation
of spherical horizons and is suitable for arbitrary horizon shapes. In
addition, the presented XOSBPD does not need volume and surface correction and
allows non-uniform discretization implementation with various horizon sizes.
Three classic examples demonstrate the accuracy and capability for complex
dynamical fracture analysis. The proposed method provides an efficient tool and
in-depth insight into the failure mechanism of structure components and solid
materials.Comment: 19 pages, 9 figure
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