711 research outputs found
Differential effects on natural killer cell production by membrane‐bound cytokine stimulations
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Context-Aware Transformer for 3D Point Cloud Automatic Annotation
3D automatic annotation has received increased attention since manually
annotating 3D point clouds is laborious. However, existing methods are usually
complicated, e.g., pipelined training for 3D foreground/background
segmentation, cylindrical object proposals, and point completion. Furthermore,
they often overlook the inter-object feature relation that is particularly
informative to hard samples for 3D annotation. To this end, we propose a simple
yet effective end-to-end Context-Aware Transformer (CAT) as an automated 3D-box
labeler to generate precise 3D box annotations from 2D boxes, trained with a
small number of human annotations. We adopt the general encoder-decoder
architecture, where the CAT encoder consists of an intra-object encoder (local)
and an inter-object encoder (global), performing self-attention along the
sequence and batch dimensions, respectively. The former models intra-object
interactions among points, and the latter extracts feature relations among
different objects, thus boosting scene-level understanding. Via local and
global encoders, CAT can generate high-quality 3D box annotations with a
streamlined workflow, allowing it to outperform existing state-of-the-art by up
to 1.79% 3D AP on the hard task of the KITTI test set
Reexamining the association of body mass index with overall survival outcomes after liver transplantation
Cloning of neuraminidase (NA) gene and identification of its antiviral activity
Neuraminidase not only works as an antigen, inducing target-specific antibodies, but also plays a role of enzyme activity and destroys the sialic acid receptor required by virus infection of the host cell surface which protects the host from virus damage. In order to explore a new idea to use neuraminidase (NA) gene and produce disease-resistant transgenic poultry, prokaryotic expression vector pGEX-NA was constructed to make NA polyclone antibody. Eukaryotic expression vector pcDNA3.0-NA and pcDNA3.0/EGFP-NA was constructed to reveal its subcelluar location by immunofluorescence and enhanced green fluorescent fusion protein (EGFP). Chicken embryonic fibroblast (CEF) cells were transfected with pcDNA3.0-NA and selected by G418 for two weeks, the transfected cells were challenged by Newcastle disease virus (NDV), the morphology of CEF cells were observed to detect the antiviral ability of NA gene. CEF cells were incubated by the cell lysates extracted from the NIH 3T3 cells, which were transfected with pcDNA3.0-NA. The results show that pGEX-NA could express NA protein in vitro and NA polyclone antibody worked very well; immunofluorescence and EGFP fusion protein revealed that NA protein located at the cytoplasm near the membrane; NDV-CEF inhibition experiment showed the NA protein could resist and delayed CEF cells from NDV infection.Key words: Neuraminidase (NA), newcastle disease virus (NDV), antiviral activity, chicken embryonic fibroblast (CEF)
An Improved Anisotropic Vector Preisach Hysteresis Model Taking Account of Rotating Magnetic Fields
Correction: Pyridine N-oxide promoted hydrosilylation of carbonyl compounds catalyzed by [PSiP]-pincer iron hydrides
Correction for ‘Pyridine N-oxide promoted hydrosilylation of carbonyl compounds catalyzed by [PSiP]-pincer iron hydrides’ by Guoliang Chang et al., Dalton Trans., 2020, 49, 9349–9354, DOI: 10.1039/D0DT00392
Pyridine N-oxide promoted hydrosilylation of carbonyl compounds catalyzed by [PSiP]-pincer iron hydrides
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