10,409 research outputs found
The Monkeytyping Solution to the YouTube-8M Video Understanding Challenge
This article describes the final solution of team monkeytyping, who finished
in second place in the YouTube-8M video understanding challenge. The dataset
used in this challenge is a large-scale benchmark for multi-label video
classification. We extend the work in [1] and propose several improvements for
frame sequence modeling. We propose a network structure called Chaining that
can better capture the interactions between labels. Also, we report our
approaches in dealing with multi-scale information and attention pooling. In
addition, We find that using the output of model ensemble as a side target in
training can boost single model performance. We report our experiments in
bagging, boosting, cascade, and stacking, and propose a stacking algorithm
called attention weighted stacking. Our final submission is an ensemble that
consists of 74 sub models, all of which are listed in the appendix.Comment: Submitted to the CVPR 2017 Workshop on YouTube-8M Large-Scale Video
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YATO: Yet Another deep learning based Text analysis Open toolkit
We introduce YATO, an open-source, easy-to-use toolkit for text analysis with
deep learning. Different from existing heavily engineered toolkits and
platforms, YATO is lightweight and user-friendly for researchers from
cross-disciplinary areas. Designed in a hierarchical structure, YATO supports
free combinations of three types of widely used features including 1)
traditional neural networks (CNN, RNN, etc.); 2) pre-trained language models
(BERT, RoBERTa, ELECTRA, etc.); and 3) user-customized neural features via a
simple configurable file. Benefiting from the advantages of flexibility and
ease of use, YATO can facilitate fast reproduction and refinement of
state-of-the-art NLP models, and promote the cross-disciplinary applications of
NLP techniques. The code, examples, and documentation are publicly available at
https://github.com/jiesutd/YATO. A demo video is also available at
https://youtu.be/tSjjf5BzfQg
Quark Delocalization, Color Screening Model and Nucleon-Baryon Scattering
We apply the quark delocalization and color screening model to nucleon-baryon
scattering. A semi-quantitative fit to N-N, N-Lambda and N-Sigma phase shifts
and scattering cross sections is obtained without invoking meson exchange.
Quarks delocalize reasonably in all of the different flavor channels to induce
effective nucleon-baryon interactions with both a repulsive core and with an
intermediate range attraction in the cases expected.Comment: 14 pp. RevTeX plus 13 figs.ps, submitted to Phys. Rev.
SketchBodyNet: A Sketch-Driven Multi-faceted Decoder Network for 3D Human Reconstruction
Reconstructing 3D human shapes from 2D images has received increasing
attention recently due to its fundamental support for many high-level 3D
applications. Compared with natural images, freehand sketches are much more
flexible to depict various shapes, providing a high potential and valuable way
for 3D human reconstruction. However, such a task is highly challenging. The
sparse abstract characteristics of sketches add severe difficulties, such as
arbitrariness, inaccuracy, and lacking image details, to the already badly
ill-posed problem of 2D-to-3D reconstruction. Although current methods have
achieved great success in reconstructing 3D human bodies from a single-view
image, they do not work well on freehand sketches. In this paper, we propose a
novel sketch-driven multi-faceted decoder network termed SketchBodyNet to
address this task. Specifically, the network consists of a backbone and three
separate attention decoder branches, where a multi-head self-attention module
is exploited in each decoder to obtain enhanced features, followed by a
multi-layer perceptron. The multi-faceted decoders aim to predict the camera,
shape, and pose parameters, respectively, which are then associated with the
SMPL model to reconstruct the corresponding 3D human mesh. In learning,
existing 3D meshes are projected via the camera parameters into 2D synthetic
sketches with joints, which are combined with the freehand sketches to optimize
the model. To verify our method, we collect a large-scale dataset of about 26k
freehand sketches and their corresponding 3D meshes containing various poses of
human bodies from 14 different angles. Extensive experimental results
demonstrate our SketchBodyNet achieves superior performance in reconstructing
3D human meshes from freehand sketches.Comment: 9 pages, to appear in Pacific Graphics 202
Nickel isotopic evidence for late-stage accretion of Mercury-like differentiated planetary embryos
Earth’s habitability is closely tied to its late-stage accretion, during which impactors delivered the majority of life-essential volatiles. However, the nature of these final building blocks remains poorly constrained. Nickel (Ni) can be a useful tracer in characterizing this accretion as most Ni in the bulk silicate Earth (BSE) comes from the late-stage impactors. Here, we apply Ni stable isotope analysis to a large number of meteorites and terrestrial rocks, and find that the BSE has a lighter Ni isotopic composition compared to chondrites. Using first-principles calculations based on density functional theory, we show that core-mantle differentiation cannot produce the observed light Ni isotopic composition of the BSE. Rather, the sub-chondritic Ni isotopic signature was established during Earth’s late-stage accretion, probably through the Moon-forming giant impact. We propose that a highly reduced sulfide-rich, Mercury-like body, whose mantle is characterized by light Ni isotopic composition, collided with and merged into the proto-Earth during the Moon-forming giant impact, producing the sub-chondritic Ni isotopic signature of the BSE, while delivering sulfur and probably other volatiles to the Earth
Lobaplatin arrests cell cycle progression in human hepatocellular carcinoma cells
<p>Abstract</p> <p>Background</p> <p>Hepatocellular carcinoma (HCC) still is a big burden for China. In recent years, the third-generation platinum compounds have been proposed as potential active agents for HCC. However, more experimental and clinical data are warranted to support the proposal. In the present study, the effect of lobaplatin was assessed in five HCC cell lines and the underlying molecular mechanisms in terms of cell cycle kinetics were explored.</p> <p>Methods</p> <p>Cytotoxicity of lobaplatin to human HCC cell lines was examined using MTT cell proliferation assay. Cell cycle distribution was determined by flow cytometry. Expression of cell cycle-regulated genes was examined at both the mRNA (RT-PCR) and protein (Western blot) levels. The phosphorylation status of cyclin-dependent kinases (CDKs) and retinoblastoma (Rb) protein was also examined using Western blot analysis.</p> <p>Results</p> <p>Lobaplatin inhibited proliferation of human HCC cells in a dose-dependent manner. For the most sensitive SMMC-7721 cells, lobaplatin arrested cell cycle progression in G<sub>1 </sub>and G<sub>2</sub>/M phases time-dependently which might be associated with the down-regulation of cyclin B, CDK1, CDC25C, phosphorylated CDK1 (pCDK1), pCDK4, Rb, E2F, and pRb, and the up-regulation of p53, p21, and p27.</p> <p>Conclusion</p> <p>Cytotoxicity of lobaplatin in human HCC cells might be due to its ability to arrest cell cycle progression which would contribute to the potential use of lobaplatin for the management of HCC.</p
Identification of a shared gene signature and biological mechanism between diabetic foot ulcers and cutaneous lupus erythemnatosus by transcriptomic analysis
Diabetic foot ulcers (DFU) and cutaneous lupus erythematosus (CLE) are both diseases that can seriously affect a patient’s quality of life and generate economic pressure in society. Symptomatically, both DLU and CLE exhibit delayed healing and excessive inflammation; however, there is little evidence to support a molecular and cellular connection between these two diseases. In this study, we investigated potential common characteristics between DFU and CLE at the molecular level to provide new insights into skin diseases and regeneration, and identify potential targets for the development of new therapies. The gene expression profiles of DFU and CLE were obtained from the Gene Expression Omnibus (GEO) database and used for analysis. A total of 41 common differentially expressed genes (DEGs), 16 upregulated genes and 25 downregulated genes, were identified between DFU and CLE. GO and KEGG analysis showed that abnormalities in epidermal cells and the activation of inflammatory factors were both involved in the occurrence and development of DFU and CLE. Protein-protein interaction network (PPI) and sub-module analysis identified enrichment in seven common key genes which is KRT16, S100A7, KRT77, OASL, S100A9, EPGN and SAMD9. Based on these seven key genes, we further identified five miRNAs(has-mir-532-5p, has-mir-324-3p,has-mir-106a-5p,has-mir-20a-5p,has-mir-93-5p) and7 transcription factors including CEBPA, CEBPB, GLI1, EP30D, JUN,SP1, NFE2L2 as potential upstream molecules. Functional immune infiltration assays showed that these genes were related to immune cells. The CIBERSORT algorithm and Pearson method were used to determine the correlations between key genes and immune cells, and reverse key gene-immune cell correlations were found between DFU and CLE. Finally, the DGIbd database demonstrated that Paquinimod and Tasquinimod could be used to target S100A9 and Ribavirin could be used to target OASL. Our findings highlight common gene expression characteristics and signaling pathways between DFU and CLE, indicating a close association between these two diseases. This provides guidance for the development of targeted therapies and mutual interactions
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