8,780 research outputs found
Excitation of high frequency voices from intermediate-mass-ratio inspirals with large eccentricity
The coalescence of a stellar-mass compact object together with an
intermediate-mass black hole, also known as intermediate-mass-ratio inspiral,
is usually not expected to be a viable gravitational wave source for the
current ground-based gravitational wave detectors, due to the generally lower
frequency of such source. In this paper, we adopt the effective-one-body
formalism as the equation of motion, and obtain the accurately calculated
gravitational waveforms by solving the Teukolsky equation in frequency-domain.
We point out that high frequency modes of gravitational waves can be excited by
large eccentricities of intermediate-mass-ratio inspirals. These high frequency
modes can extend to more than 10 Hz, and enter the designed sensitive band of
Advanced LIGO and Advanced Virgo. We propose that such kind of highly eccentric
intermediate-mass-ratio inspirals could be feasible sources and potentially
observable by the ground-based gravitational wave detectors, like the Advanced
LIGO and Advanced Virgo.Comment: 16 pages, 16 figures. Class. Quant. Gravity, accepte
Deformable Convolutional Networks
Convolutional neural networks (CNNs) are inherently limited to model
geometric transformations due to the fixed geometric structures in its building
modules. In this work, we introduce two new modules to enhance the
transformation modeling capacity of CNNs, namely, deformable convolution and
deformable RoI pooling. Both are based on the idea of augmenting the spatial
sampling locations in the modules with additional offsets and learning the
offsets from target tasks, without additional supervision. The new modules can
readily replace their plain counterparts in existing CNNs and can be easily
trained end-to-end by standard back-propagation, giving rise to deformable
convolutional networks. Extensive experiments validate the effectiveness of our
approach on sophisticated vision tasks of object detection and semantic
segmentation. The code would be released
Chronic Heat Stress Weakened the Innate Immunity and Increased the Virulence of Highly Pathogenic Avian Influenza Virus H5N1 in Mice
Chronic heat stress (CHS) can negatively affect immune response in animals. In this study we assessed the effects of CHS on host innate immunity and avian influenza virus H5N1 infection in mice. Mice were divided into two groups: CHS and thermally neutral (TN). The CHS treatment group exhibited reduced local immunity in the respiratory tract, including the number of pulmonary alveolar macrophages and lesions in the nasal mucosa, trachea, and lungs. Meanwhile, CHS retarded dendritic cells (DCs) maturation and reduced the mRNA levels of IL-6 and IFN-β significantly (P < .05). After the CHS treatment, mice were infected with H5N1 virus. The mortality rate and viral load in the lungs of CHS group were higher than those of TN group. The results suggest that the CHS treatment could suppress local immunity in the respiratory tract and innate host immunity in mice significantly and moderately increased the virulence in H5N1-infected mice
On extremal spectral radius of blow-up uniform hypergraphs
Let be an -uniform hypergraph of order and is the
spectral radius of , where is the adjacency
tensor of . A blow-up of respected to a positive integer vector , denoted by , is an
-uniform hypergraph obtained from by replacing each vertex of
with a class of vertices of size and if
, then
for every . Let
be the set of all the blow-ups of such that each
and . Let be the complete
-uniform hypergraph of order , and let be the -uniform
sunflower hypergraph with petals and a kernel of size on
vertices. For any , we prove that
with the left equality holds if and only if , and the right equality holds if and only
if , where is the complete -partite
-uniform hypergraph of order , with parts of size
or . For any , we
determine the exact value of the spectral radius of and characterize the
hypergraphs with maximum spectral radius and minimum spectral radius in
, respectively.Comment: 16 page
N-(3-Chloro-4-ethoxybenzoyl)-N′-(2-methoxyphenyl)thiourea
In the title compound, C17H17ClN2O3S, the central carbonylthiourea unit is nearly planar [maximum atomic deviation = 0.019 (3) Å] and makes dihedral angles of 2.47 (7) and 17.76 (6)° with the terminal benzene rings. An intramolecular N—H⋯O hydrogen bond occurs. Weak intermolecular C—H⋯S and C—H⋯Cl hydrogen bonding is observed in the crystal structure
Efficient Cross-Lingual Transfer for Chinese Stable Diffusion with Images as Pivots
Diffusion models have made impressive progress in text-to-image synthesis.
However, training such large-scale models (e.g. Stable Diffusion), from scratch
requires high computational costs and massive high-quality text-image pairs,
which becomes unaffordable in other languages. To handle this challenge, we
propose IAP, a simple but effective method to transfer English Stable Diffusion
into Chinese. IAP optimizes only a separate Chinese text encoder with all other
parameters fixed to align Chinese semantics space to the English one in CLIP.
To achieve this, we innovatively treat images as pivots and minimize the
distance of attentive features produced from cross-attention between images and
each language respectively. In this way, IAP establishes connections of
Chinese, English and visual semantics in CLIP's embedding space efficiently,
advancing the quality of the generated image with direct Chinese prompts.
Experimental results show that our method outperforms several strong Chinese
diffusion models with only 5%~10% training data
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