This work deals with the challenge of learning and reasoning over multi-hop
question answering (QA). We propose a graph reasoning network based on the
semantic structure of the sentences to learn cross paragraph reasoning paths
and find the supporting facts and the answer jointly. The proposed graph is a
heterogeneous document-level graph that contains nodes of type sentence
(question, title, and other sentences), and semantic role labeling sub-graphs
per sentence that contain arguments as nodes and predicates as edges.
Incorporating the argument types, the argument phrases, and the semantics of
the edges originated from SRL predicates into the graph encoder helps in
finding and also the explainability of the reasoning paths. Our proposed
approach shows competitive performance on the HotpotQA distractor setting
benchmark compared to the recent state-of-the-art models.

本文提出了一种基于句子语义结构的图推理网络，用于多步问题回答，其在 HotpotQA 分散器设置基准测试中表现出与最新的最先进模型竞争的性能，可以学习跨段理推路径，找到支持事实和答案。

SRLGRN：语义角色标注图推理网络

SRLGRN: Semantic Role Labeling Graph Reasoning Network

Matching clothing images from customers and online shopping stores has rich
applications in E-commerce. Existing algorithms encoded an image as a global
feature vector and performed retrieval with the global representation. However,
discriminative local information on clothes are submerged in this global
representation, resulting in sub-optimal performance. To address this issue, we
propose a novel Graph Reasoning Network (GRNet) on a Similarity Pyramid, which
learns similarities between a query and a gallery cloth by using both global
and local representations in multiple scales. The similarity pyramid is
represented by a Graph of similarity, where nodes represent similarities
between clothing components at different scales, and the final matching score
is obtained by message passing along edges. In GRNet, graph reasoning is solved
by training a graph convolutional network, enabling to align salient clothing
components to improve clothing retrieval. To facilitate future researches, we
introduce a new benchmark FindFashion, containing rich annotations of bounding
boxes, views, occlusions, and cropping. Extensive experiments show that GRNet
obtains new state-of-the-art results on two challenging benchmarks, e.g.,
pushing the top-1, top-20, and top-50 accuracies on DeepFashion to 26%, 64%,
and 75% (i.e., 4%, 10%, and 10% absolute improvements), outperforming
competitors with large margins. On FindFashion, GRNet achieves considerable
improvements on all empirical settings.

该研究提出了一种新颖的基于相似性金字塔的图推理网络（GRNet）算法，通过多尺度的全局和局部表征学习查询和画廊衣服的相似性，以解决现有算法中将判别的局部信息淹没在全局表征中的不足，进而实现了服装图像在电子商务中的精准检索。