2,367 research outputs found
Mutimodal Ranking Optimization for Heterogeneous Face Re-identification
Heterogeneous face re-identification, namely matching heterogeneous faces
across disjoint visible light (VIS) and near-infrared (NIR) cameras, has become
an important problem in video surveillance application. However, the large
domain discrepancy between heterogeneous NIR-VIS faces makes the performance of
face re-identification degraded dramatically. To solve this problem, a
multimodal fusion ranking optimization algorithm for heterogeneous face
re-identification is proposed in this paper. Firstly, we design a heterogeneous
face translation network to obtain multimodal face pairs, including
NIR-VIS/NIR-NIR/VIS-VIS face pairs, through mutual transformation between
NIR-VIS faces. Secondly, we propose linear and non-linear fusion strategies to
aggregate initial ranking lists of multimodal face pairs and acquire the
optimized re-ranked list based on modal complementarity. The experimental
results show that the proposed multimodal fusion ranking optimization algorithm
can effectively utilize the complementarity and outperforms some relative
methods on the SCface dataset
Baryons in the light-front approach: the three-quark picture
In this work, a three-quark picture is constructed using a bottom-up approach
for baryons in light-front quark model. The shape parameters, which
characterize the momentum distribution inside a baryon, are determined with the
help of the pole residue of the baryon. The relation between the three-quark
picture and the diquark picture is clarified. In model construction, we find
that Lorentz boost effect plays an important role, and the bottom-up modeling
approach can be generalized to multiquark states. Based on this, a unified
theoretical framework for describing multiquark states may be established. As a
by-product of model construction, we can easily obtain a new and possibly
better definition of baryon interpolating current. The hadron interpolating
currents are the starting point of Lattice QCD and QCD sum rules, and therefore
have important significance.Comment: 17 page
VIDiff: Translating Videos via Multi-Modal Instructions with Diffusion Models
Diffusion models have achieved significant success in image and video
generation. This motivates a growing interest in video editing tasks, where
videos are edited according to provided text descriptions. However, most
existing approaches only focus on video editing for short clips and rely on
time-consuming tuning or inference. We are the first to propose Video
Instruction Diffusion (VIDiff), a unified foundation model designed for a wide
range of video tasks. These tasks encompass both understanding tasks (such as
language-guided video object segmentation) and generative tasks (video editing
and enhancement). Our model can edit and translate the desired results within
seconds based on user instructions. Moreover, we design an iterative
auto-regressive method to ensure consistency in editing and enhancing long
videos. We provide convincing generative results for diverse input videos and
written instructions, both qualitatively and quantitatively. More examples can
be found at our website https://ChenHsing.github.io/VIDiff
Gap Anisotropy in Iron-Based Superconductors: A Point-Contact Andreev Reflection Study of BaFeNiAs Single Crystals
We report a systematic investigation on c-axis point-contact Andreev
reflection (PCAR) in BaFeNiAs superconducting single crystals
from underdoped to overdoped regions (0.075 ). At optimal
doping () the PCAR spectrum feature the structures of two
superconducting gap and electron-boson coupling mode. In the scenario,
quantitative analysis using a generalized Blonder-Tinkham-Klapwijk (BTK)
formalism with two gaps: one isotropic and another angle dependent, suggest a
nodeless state in strong-coupling limit with gap minima on the Fermi surfaces.
Upon crossing above the optimal doping (), the PCAR spectrum show an
in-gap sharp narrow peak at low bias, in contrast to the case of underdoped
samples (), signaling the onset of deepened gap minima or nodes in the
superconducting gap. This result provides evidence of the modulation of the gap
amplitude with doping concentration, consistent with the calculations for the
orbital dependent pair interaction mediated by the antiferromagnetic spin
fluctuations.Comment: 5 pages, 4 figure
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