108 research outputs found
GW25-e0728 Mechanism of CML/RAGE inducing ERS-mediated apoptosis in atherosclerotic apoE-/- mice
High-Fidelity Eye Animatable Neural Radiance Fields for Human Face
Face rendering using neural radiance fields (NeRF) is a rapidly developing
research area in computer vision. While recent methods primarily focus on
controlling facial attributes such as identity and expression, they often
overlook the crucial aspect of modeling eyeball rotation, which holds
importance for various downstream tasks. In this paper, we aim to learn a face
NeRF model that is sensitive to eye movements from multi-view images. We
address two key challenges in eye-aware face NeRF learning: how to effectively
capture eyeball rotation for training and how to construct a manifold for
representing eyeball rotation. To accomplish this, we first fit FLAME, a
well-established parametric face model, to the multi-view images considering
multi-view consistency. Subsequently, we introduce a new Dynamic Eye-aware NeRF
(DeNeRF). DeNeRF transforms 3D points from different views into a canonical
space to learn a unified face NeRF model. We design an eye deformation field
for the transformation, including rigid transformation, e.g., eyeball rotation,
and non-rigid transformation. Through experiments conducted on the ETH-XGaze
dataset, we demonstrate that our model is capable of generating high-fidelity
images with accurate eyeball rotation and non-rigid periocular deformation,
even under novel viewing angles. Furthermore, we show that utilizing the
rendered images can effectively enhance gaze estimation performance.Comment: Under revie
A Fermi-LAT Study of Globular Cluster Dynamical Evolution in Milky Way Galaxy: Millisecond Pulsars as the Probe
Using archival {\it Fermi}-LAT data with a time span of years, we
study the population of Millisecond Pulsars (MSPs) in Globular Clusters (GlCs)
and investigate their dependence on cluster dynamical evolution in the Milky
Way Galaxy. We show that the -ray luminosity () and
emissivity () are good indicators of the
population and abundance of MSPs in GlCs, and they are highly dependent on the
dynamical evolution history of the host clusters. Specifically speaking, the
dynamically older GlCs with more compact structures are more likely to have
larger and , and these trends can be summarized
as strong correlations with cluster stellar encounter rate and the
specific encounter rate (), with and for
dynamically normal GlCs. However, as GlCs evolve into deep core collapse, these
trends are found to be reversed, implying that strong encounters may have lead
to the ejection of MSPs from core-collapsed Systems. Besides, the GlCs are
found to exhibit larger with increasing stellar mass
function slope, decreasing tidal radius and distances from the Galactic Center
(GC). These correlations indicate that, as GlCs losing kinetic energy and
spiral in towards GC, tidal stripping and mass segregation have a preference in
leading to the loss of normal stars from GlCs, while MSPs are more likely to
concentrate to cluster center and be deposited into the GC. Moreover, we gauge
of GlCs is times larger than the Galactic
bulge, the latter is thought to reside thousands of unresolved MSPs and may
responsible for the GC -ray excess, which support that GlCs are
generous contributors to the population of MSPs in the GC.Comment: 23 pages, 9 figures, 3 tables, accepted for publication in RA
CNx-modified Fe3O4 as Pt nanoparticle support for the oxygen reduction reaction
A novel electrocatalyst support material, nitrogendoped carbon (CNx)-modified Fe3O4 (Fe3O4-CNx), was synthesized through carbonizing a polypyrrole-Fe3O4 hybridized precursor. Subsequently, Fe3O4-CNx-supported Pt (Pt/Fe3O4-CNx) nanocomposites were prepared by reducing Pt precursor in ethylene glycol solution and evaluated for the oxygen reduction reaction (ORR). The Pt/Fe3O4-CNx catalysts were characterized by X-ray diffraction, Raman spectra, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy. The electrocatalytic activity and stability of the as-prepared electrocatalysts toward ORR were studied by cyclic voltammetry and steady-state polarization measurements. The results showed that Pt/ Fe3O4-CNx catalysts exhibited superior catalytic performance for ORR to the conventional Pt/C and Pt/C-CNx catalysts.Web of Scienc
Metastable state nanoparticle-enhanced Raman spectroscopy for highly sensitive detection
Metastable state silver nanoparticle surface-enhanced Raman scattering has been experimentally and theoretically demonstrated; the signal is two to three orders of magnitude higher than that for the traditional method. Ultrasensitive surface-enhanced Raman scattering signals of illicit drug cocaine and organophosphate pesticide methyl-parathion were observed.National Basic Research Program of China[2007CB936603, 2011CB933700]; Hi-tech Research and Development Program of China[2009AA03Z330]; Anhui Provincial Education Department[KJ2010ZD09
GW29-e0787 This study was to investigate whether adiponectin (ADPN) could reduce the formation of foam cells and further inhibit diabetic
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