5 research outputs found
Inferring Tabular Analysis Metadata by Infusing Distribution and Knowledge Information
Many data analysis tasks heavily rely on a deep understanding of tables
(multi-dimensional data). Across the tasks, there exist comonly used metadata
attributes of table fields / columns. In this paper, we identify four such
analysis metadata: Measure/dimension dichotomy, common field roles, semantic
field type, and default aggregation function. While those metadata face
challenges of insufficient supervision signals, utilizing existing knowledge
and understanding distribution. To inference these metadata for a raw table, we
propose our multi-tasking Metadata model which fuses field distribution and
knowledge graph information into pre-trained tabular models. For model training
and evaluation, we collect a large corpus (~582k tables from private
spreadsheet and public tabular datasets) of analysis metadata by using diverse
smart supervisions from downstream tasks. Our best model has accuracy = 98%,
hit rate at top-1 > 67%, accuracy > 80%, and accuracy = 88% for the four
analysis metadata inference tasks, respectively. It outperforms a series of
baselines that are based on rules, traditional machine learning methods, and
pre-trained tabular models. Analysis metadata models are deployed in a popular
data analysis product, helping downstream intelligent features such as insights
mining, chart / pivot table recommendation, and natural language QA...Comment: 13pages, 7 figures, 9 table
LIGHT Amplification by NF-κB Contributes to TLR3 Signaling Pathway-Induced Acute Hepatitis
LIGHT is a member of the TNF superfamily and a proinflammatory cytokine involved in liver pathogenesis. Many liver diseases involve activation of Toll-like receptor 3 (TLR3), which is activated by double-stranded RNA (dsRNA). However, the involvement of LIGHT in TLR3 implicated liver diseases is not clear. In this study, we investigated the role of LIGHT in TLR3 involved liver pathogenesis by using a mouse model of TLR3 agonist poly(I:C)-induced hepatitis. We found LIGHT expression at both protein and mRNA level in liver tissues is dramatically increased during the course of poly(I:C)-induced liver injury. This induction depends on NF-κB activation as pretreating the mice with a NF-κB inhibitor abrogates LIGHT upregulation. Importantly, blockade of the LIGHT signaling pathway with the recombinant LIGHT receptor HVEM protein ameliorates liver injury in poly(I:C)-induced hepatitis. Conclusions. These results indicate that LIGHT amplification by NF-κB plays a significant role in TLR3 involved hepatitis and points LIGHT to be a potential drug target for liver disease therapy
Highly Enantioselective Synthesis of Chiral Cyclic Allylic Amines via Rh-Catalyzed Asymmetric Hydrogenation
Highly
regioselective and
enantioselective asymmetric hydrogenation of cyclic dienamides catalyzed
by an Rh-DuanPhos complex has been developed, which provides a readily
accessible method for the synthesis of chiral cyclic allylic amines
in excellent enantioselectivities (up to 99% ee). The products are
valuable chiral building blocks and could be easily transformed to
multisubstituted cyclohexane derivatives